Offshore wind plant reactive coordination control method based on reactive voltage sensitivity

A technology of voltage sensitivity and coordinated control, applied in the direction of AC network voltage adjustment, reactive power compensation, wind power generation, etc., can solve the problems of not fully considering the differences in spatial characteristics and the corresponding characteristics of system reactive power.

Active Publication Date: 2020-10-20
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

For the coordinated control of wind turbines and reactive power compensation devices, relevant literature distributes reactive power to each wind turbine through equal-proportion distribution control...

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  • Offshore wind plant reactive coordination control method based on reactive voltage sensitivity
  • Offshore wind plant reactive coordination control method based on reactive voltage sensitivity
  • Offshore wind plant reactive coordination control method based on reactive voltage sensitivity

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Embodiment Construction

[0057] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] A reactive power coordination control method for offshore wind farms based on reactive voltage sensitivity of the present invention, the flow chart is as follows figure 1 As shown, specifically:

[0059] 1. Detect the voltage and power of each node. Determine whether the voltage at the grid-connection point crosses the line.

[0060] (1) If the judgment result is "Yes", calculate the reactive power deficit Q of the grid-connected point ref , Reactive output limit Q of each wind turbine i_max with Q i_min And reactive voltage sensitivity matrix S. Among them, the reactive power deficit Q of the grid-connected point ref The deficit value can be obtained by using PI adjustment, and the reactive power output limit of each wind turbine can be calculated by using the equivalent circuit of the doubly-fed induction generator to o...

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Abstract

The invention discloses an offshore wind plant reactive coordination control method based on reactive voltage sensitivity, and the method specifically comprises the steps: detecting the voltage and power of each node, and judging whether the voltage of a grid-connected point crosses a line or not; distributing reactive power output of an offshore wind turbine generator and the reactive power compensation device; and distributing reactive power output of each wind turbine generator in the offshore wind power plant. According to the invention, the reactive power regulation capability of the windturbine generator can be fully utilized, and the installation cost of the reactive power compensation device of the offshore wind plant can be reduced; the reactive power output of a reactive power supply in the offshore wind plant is distributed by utilizing reactive voltage sensitivity; the dynamic regulation capacity of the wind turbine generator can be fully utilized, on one hand, the reactive power margin in the wind power plant can be increased, on the other hand, the reactive power output burden of the wind turbine generator can be reduced, and the orderliness of reactive power outputof the offshore wind turbine generator and the reactive power compensation device is achieved.

Description

technical field [0001] The invention belongs to the technical field of offshore wind farms, and in particular relates to a reactive power coordination control method for offshore wind farms based on reactive voltage sensitivity. Background technique [0002] Wind power generation is one of the power generation methods with the most mature technology and the most large-scale development conditions in new energy power generation. Due to the advantages of stable resource conditions and proximity to load centers, offshore wind power has become an important direction for the development of wind power in countries around the world in recent years. On the one hand, due to the intermittence, randomness and volatility of wind resources, the fluctuation of wind power output will lead to corresponding fluctuations in the voltage of grid-connected points of large wind farms. On the other hand, due to the large charging reactive power of submarine cables, the grid-connected point voltag...

Claims

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Application Information

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IPC IPC(8): H02J3/16H02J3/50H02J3/38
CPCH02J3/16H02J3/50H02J3/381H02J2300/28Y02E10/76Y02E40/30
Inventor 杜婉琳马明王玲雷二涛徐柏榆金莉唐挺
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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