限流式动态电压恢复器及其参数设计  

Dynamic voltage restorer with current limiting function and its parameter design

作　　者：唐君华[1] 涂春鸣[1] 姜飞[1] 刘子维[1] 郭成 帅智康[1] 

机构地区：[1]国家电能变换与控制工程技术研究中心(湖南大学),湖南长沙410082 [2]云南电力试验研究院(集团)有限公司,云南昆明650217

出　　处：《电力系统保护与控制》2015年第24期115-121,共7页Power System Protection and Control

基　　金：国家自然科学基金项目(51377051)~~

摘　　要：为优化电网正常运行时的电能质量,针对电力系统短路故障问题,提出了一种限流式动态电压恢复器(Dynamic voltage restorer with fault current limiting,DVR-FCL)拓扑结构。以限流阻抗值为目标函数,考虑直流侧电压整定的参数设计,给出了DVR-FCL的直流侧电压、输出滤波器、串联变压器参数、串联变流器、直流侧电容的整定方法。利用PSCAD/EMTDC仿真软件验证了DVR-FCL对电压跌落及短路故障的动作特性。结果表明,所提拓扑结构和参数设计方法正确,可实现改善电压质量和短路限流的双重功能,保证了电力系统安全性和稳定性。For the voltage quality optimization under normal power operation, aiming at short-circuit fault in power system, a topology of dynamic voltage restorer with current limiting function（DVR-FCL） is proposed. A parameter design of DVR-FCL based on the objective function of current limiting impedance and the adjustment of DC voltage is introduced. The design methods of the DC link voltage, the output filter, series transformer capacity, the leakage reactance, the series converter and the DC link capacitor are analyzed in detail. The operations of DVR-FCL to voltage sag and short-circuit fault are respectively verified by PSCAD/EMTDC. Simulation results show that the proposed topology and parameters design methods are correct and reasonable, and can effectively realize the double functions of voltage quality improvement and fault current limiting. Thus, it can ensure the security and stability of power system.

关 键 词：短路故障 动态电压恢复器 限流器 LC滤波器 串联变压器 

分 类 号：TM714.2[电气工程—电力系统及自动化]