Wind power plant reactive voltage control method and system
A voltage control method and technology for wind farms, applied in wind power generation, electrical components, circuit devices, etc., can solve problems such as dips, exceeding voltage standards, and voltage quality problems, and achieve the effect of ensuring safety
Pending Publication Date: 2020-09-15
GUODIAN UNITED POWER TECH
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Problems solved by technology
In the case of high-penetration wind power access, the random change of wind power will cause a surge or sudden drop in the local grid voltage, and will cause a series of voltage quality problems, and may even exceed the voltage standard, affecting the safe and stable operation of the grid
[0003] The current research mainly focuses on the reactive power distribution and reasonable dispatch of wind farm reactive equipment, so as to realize the economical and reasonable reactive power distribution of wind farms, but there are few studies on the relationship between wind farm grid-connected point voltage and station reactive power.
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[0022] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0023] figure 1 It is a schematic flowchart of a method for controlling reactive power and voltage of a wind farm provided by an embodiment of the present invention. see figure 1 , the reactive power and voltage control methods of wind farms include:
[0024] S11, the fuzzy controller obtains the voltage value U of the outlet line of the grid-connected point of the wind farm through the telecontrol device, and connects with the grid dispatching AVC master station to obtain the voltage dispatching target value instruction Uset of the wind farm.
[0025] S12. The fuzzy controller calculates the voltage deviation ΔU of the wind farm and the change rate ΔU / Δt of the v...
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The invention provides a wind power plant reactive voltage control method and system. The method comprises the following steps: acquiring a voltage value U of a grid-connected point outgoing line of awind power plant, and acquiring a voltage scheduling target value instruction Uset of the wind power plant; calculating the voltage deviation delta U of the wind power plant and the change rate deltaU / delta t of the voltage deviation according to the voltage scheduling target value instruction Uset and the voltage value U of the grid-connected point outgoing line; and calculating a reactive output target value Q of the wind power plant according to a fuzzy control algorithm to serve as an output variable of fuzzy control. According to the wind power plant reactive voltage control method andsystem provided by the invention, the reactive output of the wind power plant is automatically adjusted according to the voltage deviation of the wind power plant outgoing line, so that the voltage deviation of the wind power plant is controlled within the allowable range of the power grid, the reactive voltage of the wind power plant is automatically controlled, and the safe and stable operationof the wind power plant is guaranteed.
Description
technical field [0001] The invention relates to the technical field of wind farm group control, in particular to a wind farm reactive voltage control method and system. Background technique [0002] With the rapid growth of wind power installed capacity, the centralized output of wind power is increasing. The output of wind turbines has strong fluctuations and uncertainties, which makes large-scale wind power collection areas present the typical characteristics of high wind power penetration and weak local power grids. In the case of high-penetration wind power access, random changes in wind power will lead to surges or dips in local grid voltage, and will cause a series of voltage quality problems, and may even exceed the voltage standard, affecting the safe and stable operation of the grid. [0003] The current research mainly focuses on the reactive power distribution and reasonable scheduling of wind farm reactive equipment, so as to realize the economical and reasonabl...
Claims
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Login to View More IPC IPC(8): H02J3/50H02J3/38
CPCH02J3/50H02J3/381H02J2203/20H02J2300/22Y02E10/76
Inventor 袁凌曹扬潘磊于天笑赵冰丁亮高静方
Owner GUODIAN UNITED POWER TECH