Reactive compensation control method considering fluctuation of offshore wind power

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...

AI Technical Summary

Problems solved by technology

For the wind power access system, due to the fluctuation of wind power, the operating conditions and parameters are constantly changing, and offline pre-decision-making cannot adapt

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