基于单周控制逆变算法的动态电压恢复器设计与实现  

Dynamic voltage restorer design and implementation based on one-cycle control inverter algorithm

作　　者：王建伟[1] 张庆振[1] 胡晓光[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《电力系统保护与控制》2013年第17期95-102,共8页Power System Protection and Control

基　　金：北京航空航天大学青年教师创新基金资助项目(911901340)

摘　　要：提出了基于单周控制逆变算法的动态电压恢复器(DVR)设计方案。针对DVR逆变输出受到非线性和冲击性负载扰动的问题,将单周控制结合PI环节,建立了DVR三相H桥逆变单元的单周控制模型。硬件以32位浮点DSP芯片TMS320F28335为核心,采用IPM模块作为逆变单元的功率开关模块,在耦合变压器的副边并联固态继电器,灵活地将DVR和电网进行隔离。PWM中断服务程序根据DVR的单周控制逆变算法实时地调整PWM输出信号的脉冲宽度,以控制逆变输出电压。采用开环控制和闭环控制相结合的控制方式,开环控制在第一时间依据所建立的数学模型表实现快速补偿。在补偿误差较小时采用闭环控制,以提高控制精度及稳定性。实验分析表明,该动态电压恢复器具有响应速度快,补偿效果好,可靠性高,性能稳定等优点。The dynamic voltage restorer （DVR） design program based on one-cycle control inverter algorithm is presented. Aiming at the issue that DVR inverter output is disturbed by nonlinear and impact load, by combining PI regulator with one-cycle control, one-cycle control model of DVR three-phase H bridge inverter unit is established. The 32-bit floating-point DSP chip TMS320F28335 is taken as the core of hardware, the IPM module is used as power switch module of inverter unit, and the secondary side of coupling transformer is paralleled with solid-state relay, which flexibly insulates DVR from the grid. PWM interrupt service routine adjusts PWM output signal pulse wide in real time based on DVR one-cycle inverter algorithm to control inverter output. Main program uses a combination of open-loop control and closed-loop. The open-loop control achieves rapid compensation based on the mathematical model table in the first time. When compensation error is small, closed-loop control is adopted to improve the control precision and stability. The experimental analysis shows that the dynamic voltage restore has fast response speed, good compensation effect, high reliability and stable performance.

关 键 词：动态电压恢复器 单周控制 三相H桥 DSP IPM模块 

分 类 号：TM76[电气工程—电力系统及自动化]