CN103277250B - The appraisal procedure of wind-powered electricity generation amount is abandoned in large-scale wind electricity base based on mark post unit - Google Patents
The appraisal procedure of wind-powered electricity generation amount is abandoned in large-scale wind electricity base based on mark post unit Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses the appraisal procedure that wind-powered electricity generation amount is abandoned in a kind of large-scale wind electricity base based on mark post unit, comprise the following steps: the average output coefficient calculating wind energy turbine set every 5 minutes all mark post units, calculate this wind energy turbine set real-time start capacity of every 5 minutes, calculate this wind energy turbine set theory of every 5 minutes to exert oneself, calculate every 5 minutes abandon wind-powered electricity generation amount, draw and abandon wind-powered electricity generation amount in whole wind energy turbine set certain hour section, by calculate each wind energy turbine set in wind power base abandon that wind-powered electricity generation measures whole wind power base abandon wind-powered electricity generation amount.Realize simple to operate, cost is low and can accurately carry out abandoning the advantage that wind-powered electricity generation gauge calculates.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a method for evaluating the abandoned wind power quantity of a large wind power base based on a benchmark set.
Background
The wind power station wind abandoning amount is the amount of electric power which can not be sent out due to the influence of factors such as a power grid transmission channel, safe operation requirements and the like, and the electric power of the wind power station does not include the amount of electric power which can not be sent out due to the reasons such as the equipment failure of a fan and the like of the wind power station.
Wind abandonment is a common phenomenon in the large-scale development process of wind power and is very similar to water abandonment in the process of hydroelectric power generation. The large wind power base is wide in coverage area and generally comprises a plurality of wind power plants or wind power plant groups, and wind abandon to a certain extent can be caused by factors such as the delivery limit of a power grid transmission channel, real-time load balance and the like. The method has the advantages that the abandoned wind is accurately and scientifically known, and the abandoned wind power quantity is calculated in a reasonable mode, so that the healthy and stable development of the large-scale wind power is facilitated, the dispatching operation level of the power grid is facilitated, the coordinated development of wind power planning and power grid planning is promoted, and the utilization rate of clean energy is improved.
At present, the evaluation algorithm of abandoned wind power quantity is not standardized in the wind power industry in China, and the existing method generally calculates the difference between the output of a wind power plant and the installed capacity and then integrates the difference to obtain the abandoned wind power quantity. However, for a wind power base of ten million kilowatts, the actual output concurrency rate of each wind power plant is generally low, so that the calculation by the method generally causes inaccuracy of the calculation of the wind curtailment electric quantity. The other method is that the wind power curtailment is estimated by measuring the actual wind energy resources by the wind measuring tower, calculating the theoretical output of the unit under the condition of no wind curtailment and comparing with the actual generated energy, but the method is premised on that all wind power stations in the wind power base are provided with corresponding wind measuring towers, but when the wind power stations are not provided with corresponding wind measuring towers, the method is invalid, and particularly for a wind power base of ten million kilowatts, the corresponding wind measuring tower is difficult to establish for each wind power station. The method has high cost and complex operation.
Disclosure of Invention
The invention aims to provide a method for evaluating the abandoned wind power quantity of a large wind power base based on a benchmark set, aiming at the problems, so as to realize the advantages of simple operation, low cost and accurate calculation of the abandoned wind power quantity.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for evaluating the abandoned wind power quantity of a large wind power base based on a benchmark set comprises the following steps:
the method comprises the following steps: the running states of all the units of the wind power plant and the real-time output of each unit are obtained through the real-time information of the fans uploaded every 5 minutes of the wind power plant, and the average output coefficient of all the benchmarking units of the wind power plant every 5 minutes is calculated according to the following formula:
wherein,is the actual output of the ith benchmarking unit,the single machine capacity of the ith platform benchmark set is shown, and samp represents the set of the benchmark sets;
step two: calculating the real-time starting capacity of the wind power plant every 5 minutes, wherein the formula is as follows:
wherein,is the single machine capacity of the ith machine set, and start represents the set of the starting machine set;
step three: calculating the theoretical output of the wind power plant every 5 minutes, wherein the formula is as follows:
；
step four: obtaining a real-time output value R of the wind power plant every 5 minutes through an EMS (energy management system), and considering that wind abandoning occurs when a theoretical output value T is larger than an actual output value R, so that the wind abandoning electricity quantity every 5 minutes is expressed as:
；
step five: the abandoned wind power in a certain period of time of the whole wind power plant is represented as:
the unit capacity of a single machine of the wind power plant is MW, and the unit of the abandoned wind power is MWh;
step six: and calculating the abandoned wind electric quantity of each wind power plant in the wind power base to obtain the abandoned wind electric quantity of the whole wind power base.
According to the preferred embodiment of the invention, when the output of the wind power plant is limited, the wind power plant benchmarking unit keeps a normal power generation state; when all the fans including the benchmark units need to be stopped, the output of the wind power plant before the fans are stopped is used as the average electricity limiting power during electricity limiting, and the abandoned wind power of the wind power plant is calculated.
The technical scheme of the invention has the following beneficial effects:
the technical scheme of the invention. And calculating theoretical electric quantity of the whole wind power plant through the generated energy of the marker post units in each wind power plant, and obtaining abandoned wind electric quantity corresponding to the wind power plant through comparison with actual electric quantity so as to obtain abandoned wind electric quantity of the whole wind power base. The wind measuring tower does not need to be established for each wind power plant, so that the advantages of simplicity in operation, low cost and capability of accurately calculating the abandoned wind power quantity are realized.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a flowchart of an evaluation method for wind curtailment electric quantity of a large wind power base based on a benchmark unit according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
A method for evaluating the abandoned wind power quantity of a large wind power base based on a benchmark set comprises the following steps:
the method comprises the following steps: the running states of all the units of the wind power plant and the real-time output of each unit are obtained through the real-time information of the fans uploaded every 5 minutes of the wind power plant, and the average output coefficient of all the benchmarking units of the wind power plant every 5 minutes is calculated according to the following formula:
wherein,is the actual output of the ith benchmarking unit,the single machine capacity of the ith platform benchmark set is shown, and samp represents the set of the benchmark sets;
step two: calculating the real-time starting capacity of the wind power plant every 5 minutes, wherein the formula is as follows:
wherein,is the single machine capacity of the ith machine set, and start represents the startupThe set of the units;
step three: calculating the theoretical output of the wind power plant every 5 minutes, wherein the formula is as follows:
；
step four: obtaining a real-time output value R of the wind power plant every 5 minutes through an EMS (energy management system), and considering that wind abandoning occurs when a theoretical output value T is larger than an actual output value R, so that the wind abandoning electricity quantity every 5 minutes is expressed as:
；
step five: the abandoned wind power in a certain period of time of the whole wind power plant is represented as:
the unit capacity of a single machine of the wind power plant is MW, and the unit of the abandoned wind power is MWh;
step six: and calculating the abandoned wind electric quantity of each wind power plant in the wind power base to obtain the abandoned wind electric quantity of the whole wind power base.
When the output of the wind power plant is limited, the standard pole unit of the wind power plant keeps a normal power generation state; when all the fans including the benchmark units need to be stopped, the output of the wind power plant before the fans are stopped is used as the average electricity limiting power during electricity limiting, and the abandoned wind power of the wind power plant is calculated.
The following is a detailed description taking the specific operation of the wind farm as an example, as shown in fig. 1: when the power grid dispatching mechanism requires the wind power plant to limit the power, the power of a 'benchmark unit' of the wind power plant is not limited, the generated energy of the benchmark unit is used as the theoretical required generated energy of the similar unit of the wind power plant, the actual generated energy of the similar unit is subtracted, and the abandoned wind limited power of the whole wind power plant is obtained through summation.
The running states of all the units of the wind power plant and the real-time output of each unit can be obtained through the real-time information of the fans uploaded every 5 minutes by the wind power plant. Calculating the average output coefficient of all the benchmarking units of a certain wind power plant every 5 minutes
（1）
Calculating the real-time starting capacity of the wind power plant every 5 minutes
（2）
Calculating the theoretical output of the wind power plant every 5 minutes
（3）
The real-time output value R of the wind power plant in every 5 minutes can be obtained through an EMS (energy management system), and as most of the current power grid dispatching mechanisms do not form a perfect electricity limiting recording mechanism, the wind abandoning amount in every 5 minutes can be expressed as follows:
（4）
therefore, the wind curtailment amount of the whole wind power plant in a certain time period can be expressed as:
（5）
and if the unit capacity of the single machine of the wind power plant is MW, the unit of the abandoned wind power is MWh.
The abandoned wind electric quantity of the whole wind power base can be obtained by calculating the abandoned wind electric quantity of each wind power field in the wind power base.
The determination of the marker post units of the wind power plant is uniformly distributed according to the geographical position and the terrain in principle, and the units with different types and different capacities can be selected to accurately reflect the total actual power generation capacity of the wind power plant. Each scheduling mechanism can determine the benchmark units together with the wind power plant according to actual conditions, and the selection of the wind power plant benchmark units is required to be no more than 10% of the number of the wind power plants in principle. When the selected marker post unit breaks down, the wind power plant can replace the broken marker post unit with the adjacent wind power unit, and the power dispatching mechanism is reported in time.
When the output of the wind power plant is limited, the wind power plant marker post unit does not participate in the limited load adjustment in principle, and always keeps a normal power generation state; when all the fans including the benchmark units need to be shut down, the output of the wind power plant before the fans stop can be used as the average electricity limiting power during electricity limiting, and the abandoned wind power of the wind power plant is calculated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for evaluating the abandoned wind power quantity of a large wind power base based on a benchmark set is characterized by comprising the following steps:
the method comprises the following steps: the running states of all the units of the wind power plant and the real-time output of each unit are obtained through the real-time information of the fans uploaded every 5 minutes of the wind power plant, and the average output coefficient of all the benchmarking units of the wind power plant every 5 minutes is calculated according to the following formula:
wherein,is the actual output of the ith benchmarking unit,the single machine capacity of the ith platform benchmark set is shown, and samp represents the set of the benchmark sets;
step two: calculating the real-time starting capacity of the wind power plant every 5 minutes, wherein the formula is as follows:
wherein,is the single machine capacity of the ith machine set, and start represents the set of the starting machine set;
step three: calculating the theoretical output of the wind power plant every 5 minutes, wherein the formula is as follows:
step four: obtaining a real-time output value R of the wind power plant every 5 minutes through an EMS (energy management system), and considering that wind abandoning occurs when a theoretical output value T is larger than an actual output value R, so that the wind abandoning electricity quantity every 5 minutes is expressed as:
step five: the abandoned wind power in a certain period of time of the whole wind power plant is represented as:
the unit capacity of a single machine of the wind power plant is MW, and the unit of the abandoned wind power is MWh;
step six: and calculating the abandoned wind electric quantity of each wind power plant in the wind power base to obtain the abandoned wind electric quantity of the whole wind power base.
2. The method for evaluating the abandoned wind power quantity of the large wind power base based on the benchmarking units as claimed in claim 1, wherein when the output of the wind power plant is limited, the benchmarking units of the wind power plant keep a normal power generation state; when all the fans including the benchmark units need to be stopped, the output of the wind power plant before the fans are stopped is used as the average electricity limiting power during electricity limiting, and the abandoned wind power of the wind power plant is calculated.
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| CN105243604B (en) * | 2015-09-29 | 2022-11-01 | 国网甘肃省电力公司 | Large photovoltaic power generation cluster light abandoning amount evaluation method based on benchmark photovoltaic power station |
| CN105184097A (en) * | 2015-09-29 | 2015-12-23 | 国网甘肃省电力公司 | Large photovoltaic power generation cluster light discard electric quantity evaluation method based on grid structure clustering |
| CN105243605A (en) * | 2015-09-29 | 2016-01-13 | 国网甘肃省电力公司 | Irradiation similarity based evaluation method for light and power abandonment amount of large photovoltaic power generation cluster |
| CN105184681B (en) * | 2015-09-29 | 2022-02-11 | 国网甘肃省电力公司 | Large photovoltaic power generation cluster light abandoning electric quantity evaluation method based on nearest distance clustering |
| CN105160603A (en) * | 2015-09-29 | 2015-12-16 | 国网甘肃省电力公司 | Large wind power generation cluster wind curtailment electric quantity evaluation method based on space truss structure clustering |
| CN105160602A (en) * | 2015-09-29 | 2015-12-16 | 国网甘肃省电力公司 | Marker post wind power plant based method for calculating wind curtailment electric quantity of wind power cluster |
| CN108399429B (en) * | 2018-02-11 | 2022-03-11 | 同济大学 | Wind power plant group power generation capacity evaluation method based on big data mining technology |
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| CN101764413A (en) * | 2009-11-25 | 2010-06-30 | 中国电力科学研究院 | System simulation method for connecting large-scale wind power into power grid in centralization way |
| CN102182629A (en) * | 2011-03-29 | 2011-09-14 | 国网电力科学研究院 | Abandon wind power assessment method based on wind resource real-time measurement data |
| CN103023157A (en) * | 2012-11-13 | 2013-04-03 | 中国电力科学研究院 | Hybrid energy storage system control method for reducing abandoned wind rate and tracking wind-power planned output |
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| WO2007048001A2 (en) * | 2005-10-20 | 2007-04-26 | Reidy Michael T | Wind energy harnessing apparatuses, systems, methods, and improvements |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101764413A (en) * | 2009-11-25 | 2010-06-30 | 中国电力科学研究院 | System simulation method for connecting large-scale wind power into power grid in centralization way |
| CN102182629A (en) * | 2011-03-29 | 2011-09-14 | 国网电力科学研究院 | Abandon wind power assessment method based on wind resource real-time measurement data |
| CN103023157A (en) * | 2012-11-13 | 2013-04-03 | 中国电力科学研究院 | Hybrid energy storage system control method for reducing abandoned wind rate and tracking wind-power planned output |
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| Title |
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| 考虑电网约束的风电场自动有功控制;乔颖等;《电力系统自动化》;20091125;第33卷(第22期);第88-93页 * |
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