Design of Low Pass Filter and Regulator Parameters in Static Var Generator Based on Current Loop Phase Margin and Compensation Characteristics
Zhao Guopeng1, Han Minxiao1, 2
1. North China Electric Power University Beijing 102206 China; 2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources;North China Electric Power University Beijing 102206 China
Abstract：Based on the current loop’s stability and the reactive power compensation characteristics under direct current control, this paper proposes a low pass filter and regulator parameter design method for the static var generator (SVG). After the simplified model of the SVG has been built, the influences of parameters in L-type filters, LC-type filters, and LCL-type filters on the system stability are investigated using the transfer function the and frequency domain analyzing method with Bode diagram. Based on those results, the parameters which have a small influence on the stability are ignored to get a simplified phase margin equation which includes the system parameters. The relationships of filter parameters, regulator parameters and cut-off frequency (compensation characteristics) in SVG with three different types of low-pass filters are presented. Finally, the parameters design method is proposed in which the phase margin, the regulator parameter, the cut-off frequency, and the low-pass filter parameters are considered. With this method, the relationship between the parameters of the SVG and the phase margin is straightforward. The presented method improves the traditional low-pass filter design method which cannot combine the regulator parameters with the phase margin. The stability analysis conclusion and the validity of the parameters design method are verified by the experiment.
赵国鹏, 韩民晓. 基于电流环相位裕度和补偿特性的静止无功发生器低通滤波器与调节器参数设计方法[J]. 电工技术学报, 2015, 30(18): 147-156.
Zhao Guopeng, Han Minxiao. Design of Low Pass Filter and Regulator Parameters in Static Var Generator Based on Current Loop Phase Margin and Compensation Characteristics. Transactions of China Electrotechnical Society, 2015, 30(18): 147-156.
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2015, Vol. 30 
