模块化多电平中高压电网模拟器及其控制  

Modular Multi-Level High Voltage Grid Simulator and Its Control

作　　者：韩蓉 徐千鸣[1] 丁红旗[1] 罗安[1] Han Rong;Xu Qianming;Ding Hongqi;Luo An(National Electric Power Conversion and Control Engineering Technology Research Center Hunan University,Changsha,410082,China)

机构地区：[1]国家电能变换控制工程技术研究中心(湖南大学),长沙410082

出　　处：《电工技术学报》2018年第A01期165-175,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(51477045);博士后创新人才支持计划(BX201700311)资助

摘　　要：电网模拟器可以产生各类电网工况来测试电气设备。提出一种模块化多电平结构的高性能电网模拟器,采用多模块级联结构,可以有效提高输出电压等级和质量,且可以根据输出电压等级切换模块数,使输出测试电压能快速响应系统输出的变化。为得到高质量、快速、精确的输出电压,提出一种基于状态反馈的改进型6k±1次重复控制策略,可以兼顾系统稳态输出性能与动态响应速度。仿真和实验结果均表明,设计的电网仿真器系统可以对中高压等级的电网电压暂变、频率波动、波形畸变等工况进行测试。Grid simulators can generate a variety of grid conditions to test electrical equipment.This paper proposes a modular multi-level high-performance grid simulator,using a multi-module cascade structure,which can effectively improve the output voltage level and quality.It can switch the number of modules according to the output voltage level,so that the output test voltage can quickly respond when system output changes.In order to obtain a high-quality,fast and accurate output voltage,an improved 6k±1 repetitive control based on state feedback is proposed,which can take into account the steady-state output performance and dynamic response speed of the system.The simulation and experimental results show that the designed grid simulation system can output the voltage transients,frequency fluctuations,waveform distortion and other conditions of the medium and high voltage level.

关 键 词：电网模拟器 模块化多电平 重复控制 状态反馈控制 

分 类 号：TM464[电气工程—电器]