Reactive compensation control method considering fluctuation of offshore wind power

A compensation control, offshore wind power technology, applied in reactive power compensation, wind power generation, electrical components, etc., can solve problems such as offline pre-decision inability to adapt, and achieve the effect of improving voltage stability and fully taking into account

Active Publication Date: 2019-04-09
NINGBO ELECTRIC POWER DESIGN INST +1
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Problems solved by technology

For the wind power access system, due to the fluctuation of wind power, the operating cond

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  • Reactive compensation control method considering fluctuation of offshore wind power
  • Reactive compensation control method considering fluctuation of offshore wind power
  • Reactive compensation control method considering fluctuation of offshore wind power

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[0025] The technical solution of the present invention will be described in detail below in conjunction with the drawings.

[0026] The present invention provides a reactive power compensation control method that considers the volatility of offshore wind power, takes into account the volatility of the offshore wind power access system, and improves the voltage stability of the system based on the network structure and real-time system information to obtain reactive power compensation. The control method includes the following steps:

[0027] Step S1, the known wind power access system is equivalent to a two-node system by multi-port Thevenin equivalent, and the voltage instability index Ivsi of each node in the wind power access system is calculated;

[0028] Step S2: Determine whether the node voltage instability index is out of limit, and the out of limit node is the key node of voltage stability, and calculate the control target of the key node of voltage stability;

[0029] Step S...

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Abstract

The invention relates to a reactive compensation control method considering the fluctuation of offshore wind power. The invention takes into account the fluctuation of an offshore wind power access system, and obtains the reactive compensation control method according to a network structure and real-time system information to improve the voltage stability of the system. The reactive compensation control method considering the fluctuation of the offshore wind power comprises the following steps: step S1, performing equivalence on a known wind power access system to a two-node system through a multi-port Thevenin equivalence, so as to calculate a voltage instability index of each node in the wind power access system; step S2, determining whether the node voltage instability index exceeds a limit or not, wherein an over-limit node is a voltage stability key node; and calculating a control target of the voltage stability key node; step S3, selecting n nodes with high sensitivity as the reactive compensation location for the control sensitivity of a reactive compensation control node to the voltage stability key locations; and step S4, calculating the corresponding control amount of each control node by using the control sensitivity, and implementing control to improve the voltage stability. The reactive compensation control method considering the fluctuation of the offshore wind power can perform reactive compensation control with the aim of preventing voltage instability of the wind power access system.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a reactive power compensation control method considering the fluctuation of offshore wind power. Background technique [0002] In the current power system connected to wind power, the control strategy is mainly obtained by time-domain simulation method. However, the effectiveness of offline simulation control effect depends on the accuracy of the model and the degree of fault matching. For the wind power access system, due to the fluctuation of wind power, the operating status and its parameters are constantly changing, and offline pre-decision-making cannot adapt. Reactive power compensation control is a control method that effectively improves voltage stability, and can improve system voltage stability without affecting the load. Therefore, it is necessary to design a reactive power compensation control method that considers the fluctuation of offshore wind p...

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Application Information

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IPC IPC(8): H02J3/38H02J3/16H02J3/24
CPCH02J3/386H02J3/16H02J3/24Y02E10/76Y02E40/30
Inventor 马益平严浩军王吉庆高飞翎钱凯郭高鹏周子旺周勋甜余萃卓邵雪峰许跃章
Owner NINGBO ELECTRIC POWER DESIGN INST
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