一种新型的NPC三电平矿用无功补偿器及其解耦控制研究  

Research on a New Mine-Used NPC-Type Three Electrical Level Reactive Power Compensator and its Decoupling Control

作　　者：张益华[1] 孙玉坤[1,2] 张亮[2] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013 [2]南京工程学院电力工程学院,南京211167

出　　处：《电测与仪表》2014年第3期54-58,共5页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(61074109);江苏高校优势学科建设工程资助项目(苏政办发[2011]6号)

摘　　要：针对煤矿电气设备多为感性负载,导致煤矿电网谐波污染严重、电气设备容易损害的难题,研究设计了一种新型的NPC三电平补偿器。分析了NPC三电平补偿器的结构与工作原理,建立了三电平补偿器的动态数学模型;基于电流前馈策略和空间矢量脉宽调制(SVPWM),实现了有功电流和无功电流的动态解耦;针对解耦后的无功系统,设计了闭环PI调节器,实现了闭环系统的稳定运行;基于MATLAB/SIMULINK平台,建立了系统仿真模型,开展了相关的仿真试验研究,结果验证了论文所提策略的有效性与优越性。The wide application of inductive loads in the mine industry introduces the harmonic current to the electric gird, which pollutes the power grid and does harm to the electric equipment. To resolve this problem, a novel NPC- type three electrical level reactive power compensator is presented in this paper. The circuit structure and operating principle are first studied, based on which, the dynamic mathematic model is built. With the introduction of current feedforward control strategy and SVPWM, the dynamic decoupling strategy between active and reactive current is pro- posed. For the decoupled reactive subsystem, the PI regulator is also designed to ensure the closed-loop stability. The MATLAB/Simulink based simulation model of lation and experiments are preformed, whose strategy. the proposed control system is constructed, and the corresponding simu- results demonstrate the correctness and effectiveness of the proposed

关 键 词：三电平 SVPWM dq解耦 无功补偿 

分 类 号：TM714.3[电气工程—电力系统及自动化]