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Equivalent simulation method and device for wind power plant doubly-fed fan converter

A technology of a doubly-fed fan and a simulation method, which is applied in the field of value simulation, can solve the problems of high complexity, difficult implementation, and large amount of calculation, and achieves the effect of ensuring accuracy, simple calculation, and avoiding matrix calculation.

Pending Publication Date: 2020-11-24
STATE GRID CORP OF CHINA +4
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Problems solved by technology

[0005] The purpose of the present invention is to provide an equivalent simulation method and device for doubly-fed wind turbine converters in wind farms, which are used to solve the problems of high complexity and large amount of computation in the simulation analysis of existing large-scale power distribution network models, which lead to difficulties in implementation question

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  • Equivalent simulation method and device for wind power plant doubly-fed fan converter
  • Equivalent simulation method and device for wind power plant doubly-fed fan converter
  • Equivalent simulation method and device for wind power plant doubly-fed fan converter

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] Method example:

[0040] The invention provides an equivalent simulation method for a doubly-fed fan converter in a wind farm, comprising the following steps:

[0041] (1) The generator-side converter of the wind farm is equivalent to the first AC controlled voltage source 1 , and the grid-side converter of the wind farm is equivalent to the second AC controlled voltage source 2 .

[0042] The grid-side converter is the converter on the side connected to the grid, and the generator-side converter is the converter on the fan side. Since the grid-side converter and the machine-side converter of the wind farm are voltage source converters, the power transmission is realized by the voltage difference between the two ends of the commutation reactance, that is, the AC voltage corresponding to the output target power of the AC side of the control valve, So ...

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Abstract

The invention relates to the technical field of new energy grid-connected power generation, in particular to an equivalent simulation method and device for a wind power plant doubly-fed fan converter.According to the method, a converter is equivalent to an alternating-current controlled voltage source; the coupling relationship between the converter and the direct-current capacitor is equivalentto a controlled current source; a wind power plant doubly-fed fan converter simulation model is established after the controlled quantity of the controlled voltage is calculated; when the method is used for simulation, calculation is easy and convenient, a large number of matrix operations caused by frequent change of the state of the switch model are avoided, the wind power plant fan converter simulation model established through adoption of the method can be suitable for simulation of a wind power plant system comprising a plurality of wind turbine generators, and the system simulation efficiency can be improved on the premise that the accuracy is guaranteed.

Description

technical field [0001] The invention relates to the technical field of new energy grid-connected power generation, in particular to an equivalent simulation method and device for a doubly-fed fan converter in a wind farm. Background technique [0002] Wind power generation technology is favored due to its cleanness, no pollution, relatively mature industrial technology and relatively low power generation cost. Due to the random and intermittent characteristics of wind power generation, the scale of wind farm power generation is greatly affected by wind speed. At present, the large-scale energy storage technology is not perfect. When the asynchronous wind turbine is connected to the grid, it needs to absorb reactive power from the grid side. As a result, wind energy cannot have sufficient adjustability like conventional energy sources, which will have a negative impact on the power system. Due to the access of intermittent energy sources, the security and stability of power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G06F30/20
CPCY02E10/76
Inventor 行登江杨美娟刘启建武盾宋晓梅陈旭东高洪吴金龙姚为正
Owner STATE GRID CORP OF CHINA
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