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含LC低通滤波器的VSC-HVDC系统的新型控制策略 被引量:6

Control strategy for VSC-HVDC system with LC low-pass filter
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摘要 通过引入LC低通滤波器来滤除逆变器产生的高次电压谐波,以提高向无源网络供电的VSC-HVDC系统的供电质量。在同步旋转坐标系下,包含LC低通滤波器的VSC-HVDC系统表现出强耦合、非线性特性,不利于控制器设计。首先采用逆系统方法将原系统线性化解耦成伪线性系统,再利用变结构控制理论设计伪线性系统的闭环控制器,既可以降低设计控制系统的难度,又可以使控制系统获得较好的动态性能。利用PSCAD/EMTDC进行仿真试验。仿真结果表明,LC低通滤波器用于滤除高次电压谐波有很好的滤波效果,并且所采用的控制策略使VSC-HVDC系统获得了良好的控制性能。 In order to improve the quality of power fed by VSC-HVDC(High Voltage Direct Current transmission based on Voltage Source Converter) system to passive network,a LC low-pass filter is employed to eliminate the high-order voltage harmonics generated by the inverter.The strong coupling and nonlinearity of VSC-HVDC system with the LC filter in the synchronous rotating frame brings difficulty to the design of its controller.The inverse system method is adopted to convert it into a pseudo linear and decoupled system and the variable structure control is used to design its close-loop controllers,which lowers the design difficulty and improves the dynamic performance of VSC-HVDC control system.Simulation is carried out with PSCAD/EMTDC and the simulative results indicate that,the LC low-pass filter eliminates the high-order voltage harmonics effectively and the VSC-HVDC system with the proposed control strategy achieves excellent control performance.
出处 《电力自动化设备》 EI CSCD 北大核心 2011年第3期12-17,共6页 Electric Power Automation Equipment
基金 国家自然科学基金项目(50507002 60974036) 教育部博士点基金项目(20090092110020)~~
关键词 电压源型高压直流输电 LC低通滤波器 逆系统方法 变结构控制 VSC-HVDC LC low-pass filter inverse system method variable structure control
作者简介 黄崇鑫(1983-),男.广西桂林人,博士研究生,研究方向为电力系统控制(E-mail:huangchongxin128@126.com); 张凯锋(1977-),男,江苏宿迁人,副研究员,研究方向为电力系统控制: 戴先中(1954-),男,江苏昆山人,教授,博士研究生导师,研究方向为非线性控制、电力系统控制; 张冠虎(1985-),男,江苏盐城人,硕士研究生,研究方向为电力系统分析与控制。
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参考文献16

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