基于Boost型APD的角接SVG直流侧电压纹波抑制方法

doi:10.16180/j.cnki.issn1007-7820.2024.10.010

摘要/Abstract

摘要：

在级联H桥多电平静止无功发生器(Static Var Generator,SVG)中,H桥固有的结构特性使得角形级联SVG直流侧电容电压存在二倍频纹波,电压波动影响电能质量补偿效果甚至导致系统失调。为抑制角形级联SVG的H桥直流侧二倍频电压纹波,文中提出了基于Boost型有源功率解耦(Active Power Decoupling,APD)的角形级联H桥多电平SVG的设计方案。有源功率解耦电路将波动功率和稳定功率相互分离,采用储能元件吸收波动功率,从而削弱了H桥直流侧电压波动。利用MATLAB/Simulink搭建仿真平台进行仿真,结果表明基于Boost型有源功率解耦的角形级联H桥多电平SVG能够有效抑制直流侧电容电压的二倍频纹波。

关键词: 二倍频纹波, 三角形结构, SVG, 无功补偿, 有源功率解耦, Boost, 直流电压, 波动功率

Abstract:

In the cascaded H-bridge multilevel SVG(Static Var Generator), the inherent structural characteristics of the H-bridge lead to the presence of secondary ripple in the DC-side capacitor voltage of the angular cascaded SVG, and the voltage ripple affect the degree of compensation of power quality and even lead to system dysregulation. In order to suppress the secondary ripple of the voltage on the H-bridge DC side of the angular cascaded SVG, this study proposes a design solution for the angular cascaded H-bridge multilevel SVG based on Boost-type active power decoupling. The APD(Active Power Decoupling) circuit separates fluctuating power and stable power from each other and uses energy storage elements to absorb fluctuating power, which weakens the voltage ripple on the DC side of the H-bridge. The simulation platform was built and simulated using MATLAB/Simulink software. The simulation results show that the angular cascaded H-bridge multilevel SVG based on Boost-type active power decoupling can effectively suppress the secondary ripple of the voltage of the DC-side capacitor.

Key words: secondary ripple, triangular structure, SVG, reactive power compensation, active power decoupling, Boost, DC voltage, fluctuating power

中图分类号:

TP23

郑诗程, 刘海瑞, 徐权威, 郎佳红, 方四安, 徐磊. 基于Boost型APD的角接SVG直流侧电压纹波抑制方法[J]. 电子科技, 2024, 37(10): 71-80.

ZHENG Shicheng, LIU Hairui, XU Quanwei, LANG Jiahong, FANG Sian, XU Lei. Method of Suppressing Ripple of DC-Side Voltage of Angle-Connected SVG Based on Boost-Type APD[J]. Electronic Science and Technology, 2024, 37(10): 71-80.

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参数名称	参数值
电网线电压U	380 V
电网频率f	50 Hz
三相负载有功损耗	均为20 kW
三相负载无功损耗	均为40 kVar
直流电压预设值	250 V
H桥单元直流电容C	5 mF
交流滤波电感L	3 mH
解耦电容C_r	2 mF
解耦电感L_r	1 mH