CN109407543B - Verification method and device for voltage response characteristics of electrical model of wind turbine generator - Google Patents
Verification method and device for voltage response characteristics of electrical model of wind turbine generator Download PDFInfo
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Abstract
The invention provides a verification method and a verification device for voltage response characteristics of an electric model of a wind turbine generator, which are characterized in that a calculation time sequence and a simulation time sequence are determined firstly, then an error time sequence and an offset index are determined, and finally the voltage response characteristics of the electric model of the wind turbine generator are verified; the invention has the advantages of accurate simulation, comprehensive verification, clear principle and accurate result, meets the engineering application requirements, does not depend on the type and the composition of the simulation software of the electric power system and the electric model of the wind turbine generator system, and has stronger universality.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a method and a device for verifying voltage response characteristics of an electric model of a wind turbine generator.
Background
The simulation method is characterized in that the grid-connected characteristic of wind power is researched by simulation means, an electric model of the wind power generation set needs to be established, and the electric model of the wind power generation set can accurately simulate the voltage response characteristic of the actual wind power generation set, so that the simulation result has the basis of authenticity and credibility. Decisions based on erroneous simulation results can lead to system disturbances and equipment damage and even large-area grid accidents. Therefore, the voltage response characteristic verification of the wind turbine generator system electric model is a foundation of wind power grid-connected characteristic simulation and is also a precondition for assisting wind power grid-connected planning design and scheduling operation.
Aiming at the simulation and verification of the voltage response characteristic of the electrical model of the wind turbine, the prior art adopts a method for simulating the characteristic of the power grid voltage in the simulation software of the power system and comparing the simulation result of the voltage response characteristic of the wind turbine with the field test result. However, such methods are limited by the applicability of the simulation software of the power system and the uncertainty of the power grid model, so that the accuracy of the obtained simulation result is low. Therefore, when the voltage response characteristics of the electric simulation model of the wind turbine generator are verified, the error influence of the power grid simulation model cannot be eliminated, and the sources of the simulation result and the actually measured result errors are difficult to reasonably define, so that the method has certain limitation in the application of the electric model verification.
In order to avoid the problems, the method can be based on specific power system simulation software, the voltage control link of the electric model of the wind turbine generator is opened, a voltage test signal is connected to the voltage input end of the power grid in the control link of the wind turbine generator, and then the open-loop simulation output result of the electric model of the wind turbine generator is compared with the field test result. However, the method depends on specific power system simulation software, and has the condition of modifying the structure of an electric model of the wind turbine generator and a control link, so that the method is poor in universality. The open loop method is only suitable for verifying the control strategy and the control precision of the electric model, and because the convergence, the control stability, the compatibility of a simulation platform and the like of the simulation of the model cannot be verified due to the lack of interaction with a power grid, the simulation of the voltage response characteristic of the electric model of the wind turbine generator in the prior art is inaccurate, and the verification is incomplete.
Disclosure of Invention
In order to overcome the defects that in the prior art, the voltage response characteristic of the electric model of the wind turbine generator is inaccurate in simulation and incomplete in verification, the invention provides a method and a device for verifying the voltage response characteristic of the electric model of the wind turbine generator.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in one aspect, the invention provides a method for verifying voltage response characteristics of an electrical model of a wind turbine, which comprises the following steps:
determining a calculation time sequence according to the measurement time sequence, and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model;
determining an error time sequence according to the calculated time sequence and the simulation time sequence, and determining an offset index according to the error time sequence;
and verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index.
Before determining the calculation time sequence according to the measurement time sequence, the method comprises the following steps:
acquiring three-phase voltage of a high-voltage side bus of a transformer of the wind turbine generator, three-phase voltage of a low-voltage side bus and three-phase current of an output end of the wind turbine generator by a measuring device to obtain a measuring time sequence;
the sampling frequency of the measuring device is more than or equal to 100Hz.
The measurement time sequence comprises an A-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, a B-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, a C-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, an A-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, a B-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, a C-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, an A-phase current measurement value of an output end of the wind turbine, a B-phase current measurement value of an output end of the wind turbine and a C-phase current measurement value of an output end of the wind turbine.
The determining a calculated time sequence from the measured time sequence comprises:
determining a calculation time sequence according to the measurement time sequence and according to IEC61400-21 standard;
the calculation time sequence comprises a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator output end active current fundamental positive sequence component calculation value, a wind turbine generator output end active current fundamental negative sequence component calculation value, a wind turbine generator output end reactive current fundamental positive sequence component calculation value, a wind turbine generator output end reactive current fundamental negative sequence component calculation value, a wind turbine generator output end active power fundamental positive sequence component calculation value, a wind turbine generator output end active power fundamental negative sequence component calculation value, a wind turbine generator output end reactive power fundamental positive sequence component calculation value and a wind turbine generator output end reactive power fundamental negative sequence component calculation value.
The simulation model is constructed through power system simulation software and comprises an alternating current voltage source model, a wind turbine generator transformer model and a wind turbine generator electric model;
The wind turbine generator transformer model is connected with the alternating current voltage source model through a high-voltage side bus and connected with the wind turbine generator electric model through a low-voltage side bus.
The determining the simulation time sequence according to the calculation time sequence and the pre-constructed simulation model comprises the following steps:
and inputting the calculated value of the fundamental positive sequence component of the high-voltage side bus voltage of the wind turbine generator transformer and the calculated value of the fundamental negative sequence component of the high-voltage side bus voltage of the wind turbine generator transformer in the calculated time sequence into an alternating current voltage source model to obtain a simulation time sequence.
The simulation time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental wave positive sequence component simulation value, a wind turbine generator transformer low-voltage side bus voltage fundamental wave negative sequence component simulation value, a wind turbine generator output end active current fundamental wave positive sequence component simulation value, a wind turbine generator output end active current fundamental wave negative sequence component simulation value, a wind turbine generator output end reactive current fundamental wave positive sequence component simulation value, a wind turbine generator output end reactive current fundamental wave negative sequence component simulation value, a wind turbine generator output end active power fundamental wave positive sequence component simulation value, a wind turbine generator output end active power fundamental wave negative sequence component simulation value, a wind turbine generator output end reactive power fundamental wave positive sequence component simulation value and a wind turbine generator output end reactive power fundamental wave negative sequence component simulation value.
The error time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental wave positive sequence component error value, a wind turbine generator transformer low-voltage side bus voltage fundamental wave negative sequence component error value, a wind turbine generator output end active current fundamental wave positive sequence component error value, a wind turbine generator output end active current fundamental wave negative sequence component error value, a wind turbine generator output end reactive current fundamental wave positive sequence component error value, a wind turbine generator output end reactive current fundamental wave negative sequence component error value, a wind turbine generator output end active power fundamental wave positive sequence component error value, a wind turbine generator output end active power fundamental wave negative sequence component error value, a wind turbine generator output end reactive power fundamental wave positive sequence component error value and a wind turbine generator output end reactive power fundamental wave negative sequence component error value.
The offset index comprises a maximum error, a maximum absolute error, an average error and an average absolute error of each error value in the error time sequence.
The verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index comprises the following steps:
judging whether each error value in the error time sequence meets the respective set range according to the offset index, and if each error value in the error time sequence meets the respective set range, ensuring accurate voltage response characteristics of the electric model of the wind turbine generator; if only the positive sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer and the negative sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer meet respective set ranges in the error time sequence, the voltage response characteristic of the wind turbine is inaccurate.
On the other hand, the invention also provides a verification device for the voltage response characteristic of the electrical model of the wind turbine, which is characterized by comprising the following components:
the first determining module is used for determining a calculation time sequence according to the measurement time sequence and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model;
the second determining module is used for determining an error time sequence according to the calculated time sequence and the simulation time sequence and determining an offset index according to the error time sequence;
and the verification module is used for verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index.
The device also comprises a measurement module, which is specifically used for:
acquiring three-phase voltage of a high-voltage side bus of a transformer of the wind turbine generator, three-phase voltage of a low-voltage side bus and three-phase current of an output end of the wind turbine generator by a measuring device to obtain a measuring time sequence;
the sampling frequency of the measuring device is more than or equal to 100Hz.
The measurement time sequence comprises an A-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, a B-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, a C-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, an A-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, a B-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, a C-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, an A-phase current measurement value of an output end of the wind turbine, a B-phase current measurement value of an output end of the wind turbine and a C-phase current measurement value of an output end of the wind turbine.
The first determining module includes:
a calculation time sequence determining unit for determining a calculation time sequence according to the measurement time sequence and according to IEC61400-21 standard;
the calculation time sequence comprises a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator output end active current fundamental positive sequence component calculation value, a wind turbine generator output end active current fundamental negative sequence component calculation value, a wind turbine generator output end reactive current fundamental positive sequence component calculation value, a wind turbine generator output end reactive current fundamental negative sequence component calculation value, a wind turbine generator output end active power fundamental positive sequence component calculation value, a wind turbine generator output end active power fundamental negative sequence component calculation value, a wind turbine generator output end reactive power fundamental positive sequence component calculation value and a wind turbine generator output end reactive power fundamental negative sequence component calculation value.
The simulation model is constructed through power system simulation software and comprises an alternating current voltage source model, a wind turbine generator transformer model and a wind turbine generator electric model;
The wind turbine generator transformer model is connected with the alternating current voltage source model through a high-voltage side bus and connected with the wind turbine generator electric model through a low-voltage side bus.
The first determining module includes:
the simulation time sequence determining unit is used for inputting the calculated value of the fundamental positive sequence component of the high-voltage side bus voltage of the wind turbine generator transformer and the calculated value of the fundamental negative sequence component of the high-voltage side bus voltage of the wind turbine generator transformer in the calculation time sequence into the alternating current voltage source model to obtain a simulation time sequence.
The simulation time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental wave positive sequence component simulation value, a wind turbine generator transformer low-voltage side bus voltage fundamental wave negative sequence component simulation value, a wind turbine generator output end active current fundamental wave positive sequence component simulation value, a wind turbine generator output end active current fundamental wave negative sequence component simulation value, a wind turbine generator output end reactive current fundamental wave positive sequence component simulation value, a wind turbine generator output end reactive current fundamental wave negative sequence component simulation value, a wind turbine generator output end active power fundamental wave positive sequence component simulation value, a wind turbine generator output end active power fundamental wave negative sequence component simulation value, a wind turbine generator output end reactive power fundamental wave positive sequence component simulation value and a wind turbine generator output end reactive power fundamental wave negative sequence component simulation value.
The error time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental wave positive sequence component error value, a wind turbine generator transformer low-voltage side bus voltage fundamental wave negative sequence component error value, a wind turbine generator output end active current fundamental wave positive sequence component error value, a wind turbine generator output end active current fundamental wave negative sequence component error value, a wind turbine generator output end reactive current fundamental wave positive sequence component error value, a wind turbine generator output end reactive current fundamental wave negative sequence component error value, a wind turbine generator output end active power fundamental wave positive sequence component error value, a wind turbine generator output end active power fundamental wave negative sequence component error value, a wind turbine generator output end reactive power fundamental wave positive sequence component error value and a wind turbine generator output end reactive power fundamental wave negative sequence component error value.
The offset index comprises a maximum error, a maximum absolute error, an average error and an average absolute error of each error value in the error time sequence.
The verification module is specifically configured to:
judging whether each error value in the error time sequence meets the respective set range according to the offset index, and if each error value in the error time sequence meets the respective set range, ensuring accurate voltage response characteristics of the electric model of the wind turbine generator; if only the positive sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer and the negative sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer meet respective set ranges in the error time sequence, the voltage response characteristic of the wind turbine is inaccurate.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
according to the verification method of the voltage response characteristic of the electric model of the wind turbine generator, the calculation time sequence is determined according to the measurement time sequence, the simulation time sequence is determined according to the calculation time sequence and the pre-constructed simulation model, the error time sequence is determined according to the calculation time sequence and the simulation time sequence, the offset index is determined according to the error time sequence, and finally the voltage response characteristic of the electric model of the wind turbine generator is verified according to the offset index;
the verification device for the voltage response characteristics of the electrical model of the wind turbine generator comprises a first determination module, a second determination module and a verification module, wherein the first determination module is used for determining a calculation time sequence according to a measurement time sequence and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model, the second determination module is used for determining an error time sequence according to the calculation time sequence and the simulation time sequence and determining an offset index according to the error time sequence, and the verification module is used for verifying the voltage response characteristics of the electrical model of the wind turbine generator according to the offset index;
According to the technical scheme, based on the three-phase voltage of the high-voltage side bus, the three-phase voltage of the low-voltage side bus and the three-phase current of the output end of the wind turbine generator transformer which are actually measured on site, the problem that the actual wind turbine generator voltage characteristic cannot be accurately simulated due to the fact that the current grid model is limited by uncertainty in the prior art can be effectively solved, closed-loop simulation can be conducted on the wind turbine generator electric model, and the structure and control links for modifying the simulation model are avoided;
the technical scheme provided by the invention is beneficial to improving the accuracy and simulation performance of the electric model of the wind turbine generator, and is beneficial to wind power grid-connected planning design and safe and stable operation of a power grid so as to reduce potential safety hazards of a power system and improve the economical efficiency;
the technical scheme provided by the invention has clear principle and accurate result, meets engineering application requirements, does not depend on the type and the composition of the simulation software of the electric power system and the electric model of the wind turbine generator system, and has stronger universality;
the technical scheme provided by the invention is provided with the alternating current voltage source model, can be applied to influence analysis and characteristic verification of various disturbance or various load interaction in actual engineering, can also be applied to verification of a wind power plant equivalent model, and has wide application prospect in the technical field of wind power grid-connected simulation.
Drawings
FIG. 1 is a flow chart of a method for verifying voltage response characteristics of an electric model of a wind turbine generator system in an embodiment of the invention;
FIG. 2 is a schematic diagram of a point of field measurement signal in an embodiment of the invention;
FIG. 3 is a diagram of a simulation model architecture in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
The embodiment of the invention provides a verification method for voltage response characteristics of an electrical model of a wind turbine generator, wherein a specific flow chart is shown in fig. 1, and the specific process is as follows:
s101: determining a calculation time sequence according to the measurement time sequence, and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model;
s102: determining an error time sequence according to the calculated time sequence and the simulation time sequence determined in the step S101, and determining an offset index according to the error time sequence;
s103: and (3) verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the deviation index determined in the step (S102).
Before determining the calculation time sequence according to the measurement time sequence in step S101, the three-phase voltage of the high-voltage side bus, the three-phase voltage of the low-voltage side bus and the three-phase current of the output end of the wind turbine are collected by a measuring device to obtain a measurement time sequence, the sampling frequency of the measuring device is greater than or equal to 100Hz as shown in fig. 2, and the time of all the measurement signals is synchronous.
The measurement time sequence in S101 includes an a-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, a B-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, a C-phase voltage measurement value of a high-voltage side bus of the wind turbine transformer, an a-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, a C-phase voltage measurement value of a low-voltage side bus of the wind turbine transformer, an a-phase current measurement value of an output end of the wind turbine, a B-phase current measurement value of an output end of the wind turbine, and a C-phase current measurement value of an output end of the wind turbine, and the specific measurement time sequence is shown in table 1, where n is a certain time:
TABLE 1
| (symbol) | Unit (B) | Signal definition |
| u Ha (n) | V | A-phase voltage measurement value of high-voltage side bus of wind turbine transformer |
| u Hb (n) | V | B-phase voltage measurement value of high-voltage side bus of wind turbine transformer |
| u Hc (n) | V | C-phase voltage measurement value of high-voltage side bus of wind turbine transformer |
| u La (n) | V | A-phase voltage measurement value of low-voltage side bus of wind turbine transformer |
| u Lb (n) | V | B-phase voltage measurement value of low-voltage side bus of wind turbine transformer |
| u Lc (n) | V | C-phase voltage measurement value of low-voltage side bus of wind turbine transformer |
| i WTa (n) | A | A-phase current measurement value of output end of wind turbine generator |
| i WTb (n) | A | B-phase current measurement value of output end of wind turbine generator |
| i WTc (n) | A | C-phase current measurement value of output end of wind turbine generator |
In S101, the calculation time sequence is determined according to the measurement time sequence, specifically, the measurement time sequence, and the calculation time sequence is determined according to the IEC61400-21 standard, and electromagnetic high-frequency components with duration less than 20ms should be filtered in the calculation process. The calculation time sequence comprises a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator output end active current fundamental positive sequence component calculation value, a wind turbine generator output end active current fundamental negative sequence component calculation value, a wind turbine generator output end reactive current fundamental positive sequence component calculation value, a wind turbine generator output end reactive current fundamental negative sequence component calculation value, a wind turbine generator output end active power fundamental positive sequence component calculation value, a wind turbine generator output end active power fundamental negative sequence component calculation value, a wind turbine generator output end reactive power fundamental positive sequence component calculation value and a wind turbine generator output end reactive power fundamental negative sequence component calculation value, and the specific calculation time sequence is shown in table 2:
TABLE 2
The simulation model in the S101 is constructed through power system simulation software, a specific structure diagram is shown in FIG. 3, and the simulation model comprises an alternating current voltage source model, a wind turbine generator transformer model and a wind turbine generator electrical model;
the wind turbine generator transformer model is connected with the alternating current voltage source model through a high-voltage side bus and is connected with the wind turbine generator electric model through a low-voltage side bus.
In S101, the specific process of determining the simulation time sequence according to the calculation time sequence and the pre-constructed simulation model is as follows:
and inputting the calculated value of the fundamental positive sequence component of the high-voltage side bus voltage of the wind turbine generator transformer and the calculated value of the fundamental negative sequence component of the high-voltage side bus voltage of the wind turbine generator transformer in the calculated time sequence into an alternating current voltage source model to obtain a simulation time sequence. The simulation time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental wave positive sequence component simulation value, a wind turbine generator transformer low-voltage side bus voltage fundamental wave negative sequence component simulation value, a wind turbine generator output end active current fundamental wave positive sequence component simulation value, a wind turbine generator output end active current fundamental wave negative sequence component simulation value, a wind turbine generator output end reactive current fundamental wave positive sequence component simulation value, a wind turbine generator output end reactive current fundamental wave negative sequence component simulation value, a wind turbine generator output end active power fundamental wave positive sequence component simulation value, a wind turbine generator output end active power fundamental wave negative sequence component simulation value, a wind turbine generator output end reactive power fundamental wave positive sequence component simulation value and a wind turbine generator output end reactive power fundamental wave negative sequence component simulation value, wherein the sampling frequency of the simulation value in the simulation time sequence is consistent with the sampling frequency of a calculation value in the calculation time sequence, and the step length between each sampling point is equal. If necessary, a common time reference should be established for the simulation value and the calculation value by a time synchronization, extraction and interpolation method between sampling values. The simulation time series are specifically shown in table 3:
TABLE 3 Table 3
The error time sequence obtained in the S102 comprises a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component error value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component error value, a wind turbine generator output end active current fundamental positive sequence component error value, a wind turbine generator output end active current fundamental negative sequence component error value, a wind turbine generator output end reactive current fundamental positive sequence component error value, a wind turbine generator output end reactive current fundamental negative sequence component error value, a wind turbine generator output end active power fundamental positive sequence component error value, a wind turbine generator output end active power fundamental negative sequence component error value, a wind turbine generator output end reactive power fundamental positive sequence component error value and a wind turbine generator output end reactive power fundamental negative sequence component error value, and the offset index obtained in the S102 comprises a maximum error, a maximum absolute error, an average error and an average absolute error of each error value in the error time sequence.
In the step S103, the specific process of verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index is as follows:
judging whether each error value in the error time sequence meets the respective set range according to the offset index, wherein the method comprises the following two cases:
1) If each error value in the error time sequence meets the respective set range, the voltage response characteristic of the electrical model of the wind turbine generator is accurate;
2) If only the positive sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer and the negative sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer meet respective set ranges in the error time sequence, the voltage response characteristic of the wind turbine is inaccurate.
The final verification result of the voltage response characteristic of the electric model of the wind turbine generator is shown in the form of a graph and a table, wherein the graph comprises waveform comparison of all simulation time sequences in the table 3 and corresponding calculation time sequences and error time sequences, and the table comprises all offset indexes.
Based on the same inventive concept, the embodiment of the invention also provides a verification device for the voltage response characteristics of the electrical model of the wind turbine generator, which comprises a first determination module, a second determination module and a verification module, wherein the specific functions of the modules are described below:
the first determining module is used for determining a calculation time sequence according to the measurement time sequence and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model;
The second determining module is used for determining an error time sequence according to the calculated time sequence and the simulation time sequence and determining an offset index according to the error time sequence;
and the verification module is used for verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index.
The verification device for the voltage response characteristics of the electrical model of the wind turbine generator provided by the embodiment of the invention comprises a first determination module, a second determination module and a verification module, and also comprises a measurement module, wherein the measurement module acquires the three-phase voltage of a high-voltage side bus of a transformer of the wind turbine generator, the three-phase voltage of a low-voltage side bus and the three-phase current of an output end of the wind turbine generator through the measurement device to obtain a measurement time sequence; the sampling frequency of the measuring device is more than or equal to 100Hz.
The measurement time sequence determined by the first determination module comprises an A-phase voltage measurement value of a high-voltage side bus of the wind turbine generator transformer, a B-phase voltage measurement value of a high-voltage side bus of the wind turbine generator transformer, a C-phase voltage measurement value of a high-voltage side bus of the wind turbine generator transformer, an A-phase voltage measurement value of a low-voltage side bus of the wind turbine generator transformer, a B-phase voltage measurement value of a low-voltage side bus of the wind turbine generator transformer, a C-phase voltage measurement value of an output end of the wind turbine generator, a B-phase current measurement value of an output end of the wind turbine generator and a C-phase current measurement value of an output end of the wind turbine generator.
The first determining module comprises a calculating time sequence determining unit, wherein the calculating time sequence determining unit is specifically used for determining a calculating time sequence according to a measuring time sequence and IEC61400-21 standard, and the calculating time sequence comprises a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculated value, a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculated value, a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component calculated value, a wind turbine generator output end active current fundamental negative sequence component calculated value, a wind turbine generator output end reactive current fundamental positive sequence component calculated value, a wind turbine generator output end reactive current fundamental negative sequence component calculated value, a wind turbine generator output end active power fundamental positive sequence component calculated value, a wind turbine generator output end active power fundamental negative sequence component calculated value, a wind turbine generator output end reactive power fundamental positive sequence component calculated value and a wind turbine generator output end reactive power fundamental negative sequence component calculated value.
The simulation model is built through power system simulation software and comprises an alternating-current voltage source model, a wind turbine transformer model and a wind turbine electric model; the wind turbine generator transformer model is connected with the alternating current voltage source model through a high-voltage side bus and is connected with the wind turbine generator electric model through a low-voltage side bus.
The simulation time sequence determining unit is specifically configured to input a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculation value and a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculation value in the calculation time sequence into an ac voltage source model to obtain a simulation time sequence, where the simulation time sequence includes a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component simulation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component simulation value, a wind turbine generator output end active current fundamental positive sequence component simulation value, a wind turbine generator output end active current fundamental negative sequence component simulation value, a wind turbine generator output end reactive current fundamental negative sequence component simulation value, a wind turbine generator output end active power fundamental positive sequence component simulation value, a wind turbine generator output end active power fundamental negative sequence component simulation value, a wind turbine generator output end reactive power fundamental positive sequence component simulation value and a wind turbine generator output end reactive power fundamental negative sequence component simulation value.
The error time sequence determined by the second determining module comprises a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component error value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component error value, a wind turbine generator output end active current fundamental positive sequence component error value, a wind turbine generator output end active current fundamental negative sequence component error value, a wind turbine generator output end reactive current fundamental positive sequence component error value, a wind turbine generator output end reactive current fundamental negative sequence component error value, a wind turbine generator output end active power fundamental positive sequence component error value, a wind turbine generator output end active power fundamental negative sequence component error value, a wind turbine generator output end reactive power fundamental positive sequence component error value and a wind turbine generator output end reactive power fundamental negative sequence component error value.
The offset index determined by the second determining module includes a maximum error, a maximum absolute error, an average error and an average absolute error of each error value in the error time sequence.
The specific process of the verification module for verifying the voltage response characteristic of the electrical model of the wind turbine generator set according to the offset index is as follows:
judging whether each error value in the error time sequence meets the respective set range according to the offset index, wherein the method comprises the following two cases:
1) If each error value in the error time sequence meets the respective set range, the voltage response characteristic of the electrical model of the wind turbine generator is accurate;
2) If only the positive sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer and the negative sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer meet respective set ranges in the error time sequence, the voltage response characteristic of the wind turbine is inaccurate.
For convenience of description, the parts of the above apparatus are described as being functionally divided into various modules or units, respectively. Of course, the functions of each module or unit may be implemented in the same piece or pieces of software or hardware when implementing the present application.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and a person skilled in the art may still make modifications and equivalents to the specific embodiments of the present invention with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims of the present invention as filed herewith.
Claims (14)
1. The verification method of the voltage response characteristic of the electrical model of the wind turbine generator is characterized by comprising the following steps:
determining a calculation time sequence according to the measurement time sequence, and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model;
determining an error time sequence according to the calculated time sequence and the simulation time sequence, and determining an offset index according to the error time sequence;
Verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index;
acquiring three-phase voltage of a high-voltage side bus of a transformer of the wind turbine generator, three-phase voltage of a low-voltage side bus and three-phase current of an output end of the wind turbine generator by a measuring device to obtain a measuring time sequence;
the simulation model is constructed through power system simulation software and comprises an alternating current voltage source model, a wind turbine generator transformer model and a wind turbine generator electric model;
the wind turbine generator transformer model is connected with the alternating current voltage source model through a high-voltage side bus and is connected with the wind turbine generator electric model through a low-voltage side bus;
the determining the simulation time sequence according to the calculation time sequence and the pre-constructed simulation model comprises the following steps:
inputting the calculated value of the fundamental positive sequence component of the high-voltage side bus voltage of the wind turbine generator transformer and the calculated value of the fundamental negative sequence component of the high-voltage side bus voltage of the wind turbine generator transformer in the calculated time sequence into an alternating current voltage source model to obtain a simulation time sequence;
the verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index comprises the following steps:
judging whether each error value in the error time sequence meets the respective set range according to the offset index, and if each error value in the error time sequence meets the respective set range, ensuring accurate voltage response characteristics of the electric model of the wind turbine generator; if only the positive sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer and the negative sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer meet respective set ranges in the error time sequence, the voltage response characteristic of the wind turbine is inaccurate.
2. The method for verifying voltage response characteristics of an electrical model of a wind turbine according to claim 1, wherein before determining the calculation time series from the measurement time series, the method comprises:
the sampling frequency of the measuring device is more than or equal to 100Hz.
3. The method for verifying voltage response characteristics of a wind turbine generator electrical model according to claim 1, wherein the measurement time sequence includes an a-phase voltage measurement value of a high-voltage side bus of a wind turbine generator transformer, a B-phase voltage measurement value of a high-voltage side bus of the wind turbine generator transformer, a C-phase voltage measurement value of a high-voltage side bus of the wind turbine generator transformer, an a-phase voltage measurement value of a low-voltage side bus of the wind turbine generator transformer, a B-phase voltage measurement value of a low-voltage side bus of the wind turbine generator transformer, a C-phase voltage measurement value of a low-voltage side bus of the wind turbine generator, an a-phase current measurement value of an output end of the wind turbine generator, a B-phase current measurement value of an output end of the wind turbine generator, and a C-phase current measurement value of an output end of the wind turbine generator.
4. The method for verifying voltage response characteristics of an electrical model of a wind turbine as defined in claim 1, wherein determining a calculated time sequence from the measured time sequence comprises:
Determining a calculation time sequence according to the measurement time sequence and according to IEC61400-21 standard;
the calculation time sequence comprises a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator output end active current fundamental positive sequence component calculation value, a wind turbine generator output end active current fundamental negative sequence component calculation value, a wind turbine generator output end reactive current fundamental positive sequence component calculation value, a wind turbine generator output end reactive current fundamental negative sequence component calculation value, a wind turbine generator output end active power fundamental positive sequence component calculation value, a wind turbine generator output end active power fundamental negative sequence component calculation value, a wind turbine generator output end reactive power fundamental positive sequence component calculation value and a wind turbine generator output end reactive power fundamental negative sequence component calculation value.
5. The method for verifying voltage response characteristics of a wind turbine generator electrical model according to claim 1, wherein the simulation time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component simulation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component simulation value, a wind turbine generator output active current fundamental positive sequence component simulation value, a wind turbine generator output active current fundamental negative sequence component simulation value, a wind turbine generator output reactive current fundamental positive sequence component simulation value, a wind turbine generator output reactive current fundamental negative sequence component simulation value, a wind turbine generator output active power fundamental positive sequence component simulation value, a wind turbine generator output active power fundamental negative sequence component simulation value, a wind turbine generator output reactive power fundamental positive sequence component simulation value and a wind turbine generator output reactive power fundamental negative sequence component simulation value.
6. The method for verifying voltage response characteristics of a wind turbine generator electrical model according to claim 1, wherein the error time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component error value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component error value, a wind turbine generator output active current fundamental positive sequence component error value, a wind turbine generator output active current fundamental negative sequence component error value, a wind turbine generator output reactive current fundamental positive sequence component error value, a wind turbine generator output reactive current fundamental negative sequence component error value, a wind turbine generator output active power fundamental positive sequence component error value, a wind turbine generator output active power fundamental negative sequence component error value, a wind turbine generator output reactive power fundamental positive sequence component error value, and a wind turbine generator output reactive power fundamental negative sequence component error value.
7. The method for verifying voltage response characteristics of an electrical model of a wind turbine according to claim 1, wherein the offset index includes a maximum error, a maximum absolute error, an average error, and an average absolute error of each error value in the error time sequence.
8. The utility model provides a verifying attachment of wind turbine generator system electric model voltage response characteristic which characterized in that includes:
the first determining module is used for determining a calculation time sequence according to the measurement time sequence and determining a simulation time sequence according to the calculation time sequence and a pre-constructed simulation model;
the second determining module is used for determining an error time sequence according to the calculated time sequence and the simulation time sequence and determining an offset index according to the error time sequence;
the verification module is used for verifying the voltage response characteristic of the electrical model of the wind turbine generator according to the offset index;
the device also comprises a measurement module, which is specifically used for:
acquiring three-phase voltage of a high-voltage side bus of a transformer of the wind turbine generator, three-phase voltage of a low-voltage side bus and three-phase current of an output end of the wind turbine generator by a measuring device to obtain a measuring time sequence;
the simulation model is constructed through power system simulation software and comprises an alternating current voltage source model, a wind turbine generator transformer model and a wind turbine generator electric model;
the wind turbine generator transformer model is connected with the alternating current voltage source model through a high-voltage side bus and is connected with the wind turbine generator electric model through a low-voltage side bus;
The first determining module includes:
the simulation time sequence determining unit is used for inputting the calculated value of the fundamental positive sequence component of the high-voltage side bus voltage of the wind turbine generator transformer and the calculated value of the fundamental negative sequence component of the high-voltage side bus voltage of the wind turbine generator transformer in the calculation time sequence into the alternating current voltage source model to obtain a simulation time sequence;
the verification module is specifically configured to:
judging whether each error value in the error time sequence meets the respective set range according to the offset index, and if each error value in the error time sequence meets the respective set range, ensuring accurate voltage response characteristics of the electric model of the wind turbine generator; if only the positive sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer and the negative sequence component error value of the low-voltage side bus voltage fundamental wave of the wind turbine transformer meet respective set ranges in the error time sequence, the voltage response characteristic of the wind turbine is inaccurate.
9. The device for verifying voltage response characteristics of an electrical model of a wind turbine generator according to claim 8, wherein the sampling frequency of the measuring device is greater than or equal to 100Hz.
10. The device for verifying voltage response characteristics of a wind turbine generator electrical model according to claim 8, wherein the measurement time sequence includes an a-phase voltage measurement of a high-voltage side bus of a wind turbine generator transformer, a B-phase voltage measurement of a high-voltage side bus of the wind turbine generator transformer, a C-phase voltage measurement of a high-voltage side bus of the wind turbine generator transformer, an a-phase voltage measurement of a low-voltage side bus of the wind turbine generator, a B-phase voltage measurement of a low-voltage side bus of the wind turbine generator, a C-phase voltage measurement of a low-voltage side bus of the wind turbine generator, an a-phase current measurement of an output of the wind turbine generator, a B-phase current measurement of an output of the wind turbine generator, and a C-phase current measurement of an output of the wind turbine generator.
11. The apparatus for verifying voltage response characteristics of a wind turbine generator electrical model of claim 8, wherein the first determination module comprises:
a calculation time sequence determining unit for determining a calculation time sequence according to the measurement time sequence and according to IEC61400-21 standard;
the calculation time sequence comprises a wind turbine generator transformer high-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer high-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component calculation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component calculation value, a wind turbine generator output end active current fundamental positive sequence component calculation value, a wind turbine generator output end active current fundamental negative sequence component calculation value, a wind turbine generator output end reactive current fundamental positive sequence component calculation value, a wind turbine generator output end reactive current fundamental negative sequence component calculation value, a wind turbine generator output end active power fundamental positive sequence component calculation value, a wind turbine generator output end active power fundamental negative sequence component calculation value, a wind turbine generator output end reactive power fundamental positive sequence component calculation value and a wind turbine generator output end reactive power fundamental negative sequence component calculation value.
12. The device for verifying voltage response characteristics of a wind turbine generator electrical model according to claim 8, wherein the simulation time sequence comprises a wind turbine generator transformer low-voltage side bus voltage fundamental positive sequence component simulation value, a wind turbine generator transformer low-voltage side bus voltage fundamental negative sequence component simulation value, a wind turbine generator output active current fundamental positive sequence component simulation value, a wind turbine generator output active current fundamental negative sequence component simulation value, a wind turbine generator output reactive current fundamental positive sequence component simulation value, a wind turbine generator output reactive current fundamental negative sequence component simulation value, a wind turbine generator output active power fundamental positive sequence component simulation value, a wind turbine generator output active power fundamental negative sequence component simulation value, a wind turbine generator output reactive power fundamental positive sequence component simulation value and a wind turbine generator output reactive power fundamental negative sequence component simulation value.
13. The device for verifying voltage response characteristics of a wind turbine generator electrical model according to claim 8, wherein the error time sequence comprises a wind turbine generator transformer low-side bus voltage fundamental positive sequence component error value, a wind turbine generator transformer low-side bus voltage fundamental negative sequence component error value, a wind turbine generator output active current fundamental positive sequence component error value, a wind turbine generator output active current fundamental negative sequence component error value, a wind turbine generator output reactive current fundamental positive sequence component error value, a wind turbine generator output reactive current fundamental negative sequence component error value, a wind turbine generator output active power fundamental positive sequence component error value, a wind turbine generator output active power fundamental negative sequence component error value, a wind turbine generator output reactive power fundamental positive sequence component error value, and a wind turbine generator output reactive power fundamental negative sequence component error value.
14. The device for verifying voltage response characteristics of an electrical model of a wind turbine according to claim 8, wherein the offset index includes a maximum error, a maximum absolute error, an average error, and an average absolute error of each error value in the error time sequence.
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