CN210835636U - Commutation switch type three-phase unbalance treatment device closed-loop simulation test platform - Google Patents
Commutation switch type three-phase unbalance treatment device closed-loop simulation test platform Download PDFInfo
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Abstract
The utility model provides a device closed loop emulation test platform is administered to commutation switch type unbalanced three phase, including real-time digital simulation system, analog output integrated circuit board, analog input integrated circuit board, logic module, power amplification system, surveyed device, signal acquisition system, the device of being surveyed includes commutation host computer and commutation switch, power amplification system includes commutation host computer power amplification system and commutation switch power amplification system. The utility model discloses can develop the control strategy of unbalanced control effect experiment, the unbalanced three-phase voltage is experimental, the short circuit is experimental, lack the looks is experimental, the power is sent back experiments etc. to the unbalanced control device of commutation switch type three-phase, as the powerful replenishment of pure software principle emulation and device monomer test. The method is almost suitable for testing all types of low-voltage loads and fault conditions by enriching the simulation model, has good compatibility and expandability, and greatly reduces the cost and the testing expense for building a testing platform through actual equipment.
Description
Technical Field
The patent of the utility model relates to a device closed loop emulation test platform is administered to commutation switch type unbalanced three phase belongs to emulation test technical field.
Background
The phase-change switch type three-phase unbalance treating device is one kind of low voltage integrated electric appliance and includes two parts, one phase-change main unit and one phase-change switch. The commutation host is arranged at a low-voltage outlet of the transformer and is responsible for monitoring three-phase unbalance information and issuing a switching command of the commutation switch according to a control strategy; the phase-change switch is independently installed in a meter collecting box, a single-phase lower service line pole or a junction box, can monitor load power and current information of a load loop of the phase-change switch and send the load power and the current information to the host, and carries out corresponding phase-change operation according to a phase-change command issued by the phase-change host, so that real-time balanced distribution of three-phase loads in a treatment platform area is realized.
For the test of the commutation switch type three-phase unbalance treatment device, the test is generally focused on the performance of the commutation host and the commutation switch when the two devices operate independently, such as voltage and current detection precision, switching time length, switching inrush current and the like, but the performance detection of the commutation host and the commutation switch in the aspect of matching is still carried out through an actual device experiment at the present stage. And the test platform of the low-voltage distribution network is built through actual equipment, a large amount of high-power load equipment, circuits and the like need to be purchased, the experimental power consumption is large, the expandability is poor, the real-time change of the power grid load is difficult to simulate, the simulation of extreme conditions such as power grid faults is still difficult to realize, and the comprehensive performance test of the tested device is difficult to develop.
The real-time digital simulation system (such as RT-LAB and RTDS real-time digital simulation systems) has strong calculation simulation capability and rich input and output interfaces, can simulate a power supply, a net rack, a load and various operation states thereof through a software model on one hand, and can be physically connected with an actual device on the other hand, so that an operation signal of the software model is output to the actual device, the operation state of the actual device is collected to the software model to form a real-time closed-loop simulation system, and irreplaceable effects are achieved on device control strategy verification and extreme fault condition simulation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device real-time closed loop emulation test platform's design is administered to commutation switch type unbalanced three phase based on real-time digital simulation system, aim at providing a development cost low, can test commutation switch type unbalanced three phase administration device more comprehensively, more closely simulate polymorphic type load and situation of change in practice, verifying attachment is at the control strategy of all kinds of load condition and extreme fault condition, the unbalanced three phase treatment effect and the safety and stability operation of guarantee device.
In order to achieve the above object, the utility model provides a following technical scheme: a closed loop simulation test platform of a commutation switch type three-phase imbalance treatment device comprises a real-time digital simulation system, an analog output board card, an analog input board card, a logic module, a power amplification system, a device to be tested and a signal acquisition system, the device to be tested comprises a phase change host and a phase change switch, the power amplification system comprises a phase change host power amplification system and a phase change switch power amplification system, the real-time digital simulation system operates each electric power equipment model in the power grid system in real time to simulate the power grid and load conditions, the information of each node in the system is fed back to the outside through the analog output board card, and then the signal is output to the tested device through the power amplification system, meanwhile, the phase switching condition of the tested device is detected through a signal acquisition system, the phase switching condition is converted into a signal identified by the model through a logic module, and the running state of the model is modified in real time; the real-time digital simulation system and the tested device form a test closed loop to check the actual operation performance of the tested device.
Preferably, each power equipment model comprises a distribution transformer model, a line model, a three-phase and single-phase load model, a commutation host model, a commutation switch model, a fault model, wind power, photovoltaic and energy storage model.
Preferably, the logic module is a commutation switch switching logic module.
Preferably, the phase change host model acquires three-phase voltage and three-phase current at an outlet of the distribution transformer and outputs the three-phase voltage and the three-phase current to the phase change host power amplification system through the analog output board card according to a certain proportion.
Preferably, the phase change switch model acquires three-phase voltage and load current of the connected loaded access point and outputs the three-phase voltage and the load current to the phase change switch power amplification system through the analog output board card according to a certain proportion; and simultaneously, receiving phase information of the phase change switch of the tested device, and following the phase change of the phase change switch of the tested device through certain logic.
Preferably, the phase change host power amplification system receives real-time operating voltage and current parameters of the analog output board card, amplifies and outputs the real-time operating voltage and current parameters to a voltage transformer and a current transformer of the phase change host and a voltage transformer and a current transformer of the phase change switch, so that the phase change host power amplification system can be compatible with a signal collector of a tested device.
Preferably, signals between each phase voltage, each phase current and each voltage current of the phase-change switch power amplification system are isolated from each other.
Preferably, the signal acquisition system samples and identifies the phase change of the phase change switch of the device to be detected through a relay, and inputs the sampled and identified phase change to the real-time digital simulation system through the analog input board card, so as to realize the detection of the phase change switch output of the device to be detected.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses constitute emulation test platform based on real-time digital simulation system, power amplification system, signal acquisition system, can develop experiments such as unbalanced treatment effect test, three-phase voltage unbalance test, short circuit test, default phase experiment, power back-off test to the control strategy of the unbalanced treatment device of commutation switch type three-phase, can regard as pure software principle emulation and device monomer test's powerful supplementary. The method is almost suitable for testing all types of low-voltage loads and fault conditions by enriching the simulation model, has good compatibility and expandability, and greatly reduces the cost and the testing expense for building a testing platform through actual equipment.
Drawings
FIG. 1 is a block diagram of the overall structure of the present invention;
FIG. 2 is a diagram of a model of a commutation host of the present invention;
FIG. 3 is a diagram of a phase change switch model according to the present invention;
fig. 4 is a wiring diagram of the power amplification system and the commutation host of the present invention;
fig. 5 is a wiring diagram of the power amplification system and the commutation switch of the present invention;
fig. 6 is a structure diagram of the phase change switch switching logic module of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The utility model discloses a software model uses RT-LAB real-time digital simulation system as an example, and other real-time digital simulation system's such as RTDS model is similar.
As shown in fig. 1, the real-time digital simulation system simulates a power grid environment by building various power supplies, grid frames, loads and fault models, and outputs voltage and current of each node to a commutation host and a commutation switch of a device to be tested through an analog output board card and a power amplification system; after the tested device detects the input signal, the tested device responds in the modes of self acquisition, operation, communication, switching and the like; the real-time digital simulation system collects signals of a device to be tested through an analog input board card, converts the signals into signals identified by a software model through modes such as a logic module and the like, and makes corresponding response to form a closed loop.
The real-time digital simulation system runs each power equipment model in the power grid system in real time, simulates the power grid and load conditions, and feeds back information of each node in the system to the outside through the analog output board card. Meanwhile, the real-time digital simulation system collects phase information output by the phase change switch of the tested device and performs the same phase change operation on the phase change switch model in the simulation system, so that the aim of testing the overall treatment performance of the device in the real-time digital simulation system is fulfilled.
The power equipment models comprise a distribution transformer model, a line model, a three-phase and single-phase load model, a commutation host model, a commutation switch model, a fault model, a micro-grid model of wind power, photovoltaic, energy storage and the like.
The phase change host model acquires three-phase voltage and three-phase current at the outlet of the distribution transformer and outputs the three-phase voltage and the three-phase current to the phase change host power amplification system through the analog output board card according to a certain proportion, as shown in fig. 2.
The phase change switch model acquires three-phase voltage and load current of a connected load access point and outputs the three-phase voltage and the load current to a phase change switch power amplification system through an analog output board card according to a certain proportion; meanwhile, phase information of the phase change switch of the device to be tested is received, and the phase information of the phase change switch of the device to be tested is followed by certain logic, as shown in fig. 3.
The phase change host power amplification system receives real-time operating voltage and current parameters of the analog output board card, amplifies and outputs the parameters to a voltage transformer and a current transformer of the actual phase change host and a voltage transformer and a current transformer of the phase change switch, so that the phase change host power amplification system can be compatible with a signal collector of an actual device, as shown in fig. 4. Signals among phase voltages, phase currents and voltage currents of the power amplification system of the phase change host are isolated from one another, the head end of the three-phase voltage output is directly connected with a connecting terminal of the phase change host A, B, C, and the tail end of the three-phase voltage output is connected with an N connecting terminal of the phase change host after being connected in parallel; the head end of the current output terminal is connected with a wiring terminal of the phase-changing host A, B, C, and the tail end of the current output terminal is connected with wiring terminals of the phase-changing hosts a, b and c. Because the signals are isolated from each other, the three-phase voltage output circuit only has one common connection point; each phase voltage output loop and each corresponding phase current output loop only have one common connection point, so that the normal operation of the voltage current loop is not influenced.
Signals among phase voltages, phase currents and voltage currents of the phase change switch power amplification system are isolated from one another, the head end of a three-phase voltage output is directly connected with a connecting terminal of a phase change switch A, B, C, and the tail end of the three-phase voltage output is connected with a connecting terminal of a phase change switch N after being connected in parallel; because only one current signal is needed to be input into the phase change switch, the head end of the A-phase current output terminal is connected with the connecting terminal of the phase change switch A, B, C, and the tail end of the A-phase current output terminal is connected with the connecting terminal of the phase change switch k, as shown in FIG. 5. Because the signals are isolated from each other, the three-phase voltage output circuit only has one common connection point; the voltage output loops of each phase and the phase A current output loop only have a common connection point, so that the normal operation of the voltage current loop is not influenced.
The signal acquisition system passes 220V: the 5V voltage transformer respectively collects the voltage between the connecting terminal of the commutation switch A, B, C and the N connecting terminal to obtain secondary voltages Ux, Uy and Uz and the voltage between the connecting terminal of the commutation switch k and the N connecting terminal to obtain a secondary voltage Uk.
The signal acquisition system samples and identifies the phase change of the phase change switch of the device to be detected through the relay, and inputs the sampled and identified phase change into the real-time digital simulation system through the analog input board card, so that the phase change switch output of the device to be detected is detected, as shown in fig. 6.
The commutation switch switching logic acquires the commutation switches Ux, Uy, Uz and Uk of the tested device and calculates the difference values of the Ux, Uy, Uz and Uk to obtain the phase of the connected load of the commutation switches. Because Ux, Uy and Uz are respectively equal to three-phase voltages Ua, Ub and Uc of the phase change switch access point, and Uk is equal to the voltage of the phase change switch with load. When the phase change switch is switched to the a phase,
therefore, the phase of the tested device phase change switch can be obtained by directly comparing the difference values of Ux, Uy, Uz and Uk.
The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides a device closed loop emulation test platform is administered to commutation switch type unbalanced three phase which characterized in that: the real-time digital simulation system operates each power equipment model in the power grid system in real time to simulate the power grid and load conditions, feeds back information of each node in the system to the outside through the analog output board card, outputs a signal to the tested device through the power amplification system, detects the phase switching condition of the tested device through the signal acquisition system, converts the phase switching condition into a signal identified by the model through the logic module, and modifies the operating state of the model in real time; the real-time digital simulation system and the tested device form a test closed loop to check the actual operation performance of the tested device.
2. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 1, wherein: the power equipment models comprise a distribution transformer model, a line model, a three-phase and single-phase load model, a commutation host model, a commutation switch model, a fault model, wind power, photovoltaic and energy storage models.
3. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 1, wherein: the logic module is a commutation switch switching logic module.
4. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 2, wherein: the phase change host model acquires three-phase voltage and three-phase current at an outlet of the distribution transformer and outputs the three-phase voltage and the three-phase current to the phase change host power amplification system through the analog output board card according to a certain proportion.
5. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 2, wherein: the phase change switch model acquires three-phase voltage and load current of a connected loaded access point and outputs the three-phase voltage and the load current to a phase change switch power amplification system through an analog output board card according to a certain proportion; and simultaneously, receiving phase information of the phase change switch of the tested device, and following the phase change of the phase change switch of the tested device through certain logic.
6. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 1, wherein: the phase change host power amplification system receives real-time running voltage and current parameters of the analog output board card, amplifies and outputs the parameters to a voltage transformer and a current transformer of the phase change host and a voltage transformer and a current transformer of the phase change switch, and enables the phase change host power amplification system to be compatible with a signal collector of a tested device.
7. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 1, wherein: signals among the phase voltages, the phase currents and the voltage currents of the phase-change switch power amplification system are isolated from each other.
8. The closed-loop simulation test platform for the commutation switch type three-phase imbalance treatment device according to claim 1, wherein: the signal acquisition system samples and identifies the phase change of the phase change switch of the device to be detected through the relay, and inputs the sampled and identified phase change into the real-time digital simulation system through the analog input board card, so that the phase change switch output of the device to be detected is detected.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118011868A (en) * | 2024-04-08 | 2024-05-10 | 杭州沃镭智能科技股份有限公司 | Rotary transformer and eddy current position sensor simulation board card |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118011868A (en) * | 2024-04-08 | 2024-05-10 | 杭州沃镭智能科技股份有限公司 | Rotary transformer and eddy current position sensor simulation board card |
| CN118011868B (en) * | 2024-04-08 | 2024-06-11 | 杭州沃镭智能科技股份有限公司 | Rotary transformer and eddy current position sensor simulation board card |
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