基于直接电流控制的静止无功发生器研究

Research of Static Var Generator Based on Direct Current Control

介绍了采用电压外环、电流内环结构的静止无功发生器(SVG)直接电流控制策略,通过状态反馈解耦算法实现了有功和无功电流的独立控制,并采用自适应滤波算法来检测频繁波动的SVG直流侧电压直流分量,提高了SVG的控制精度。基于实时数字仿真(RTDS)平台的试验结果验证了直接电流控制策略响应快、精度高的特点。

Introduction was made to the direct current control strategy of a static var generator （SVG） adopting outer voltage loop and inner current loop. The state feedback decoupling algorithm was used to realize the separate control of active and reactive current. The adaptive filtering algorithm was adopted to detect DC voltage component at the SVG＇s DC side which fluctuated frequently, so that the control precision of the SVG was raised. The simulation results based on the real-time digital system （RTDS） platform verify the features of rapid response and high accuracy of the direct current control strategy.