10kV动态电压恢复器及其整流控制策略  

10 kV Dynamic Voltage Restorer and Its Rectifier Control Strategy

作　　者：叶傅华 陈国栋 宋晋峰 周悦 

机构地区：[1]上海电气输配电集团,上海200042

出　　处：《大功率变流技术》2011年第4期44-48,共5页HIGH POWER CONVERTER TECHNOLOGY

摘　　要：针对10 kV配电系统,动态电压恢复器(DVR)采用无串联变压器、模块级联、从网侧通过可控整流取能的拓扑结构。文章在简单分析了单相电压型PWM整流器双闭环控制原理及特点的基础上,提出了一种直流电压单闭环控制策略。该策略有利于降低直流电压、减小开关器件电压应力、减少直流电容串联的数量,在体积、成本大为减小和降低的同时,其控制性能有所提高。利用PSCAD/EMTDC软件对所提出的控制策略结合DVR的补偿控制进行了仿真,仿真结果验证了该控制策略的有效性及可行性。A dynamic voltage restorer（DVR） used in 10 kV distribution network is constructed with no series injection transformer,cascaded cells and a single-phase PWM rectifier connected to the power side.In addition to the principle and characteristics of double closedloop control for single-phase voltage PWM rectifier,a DC voltage single closed-loop control strategy is proposed.It can help to reduce DC voltage level,voltage stress of switch devices and the series amount of DC capacitance.Therefore,the control performance is proved based on the decreased volume and lowered cost.The proposed control strategy and with the DVR compensative control methods are simulated through PSCAD/EMTDC software.Simulation results verify the effectiveness and feasibility of this strategy.

关 键 词：电能质量 动态电压恢复器 单相整流 定制电力 电压型变流器 

分 类 号：TM76[电气工程—电力系统及自动化]