| 引用本文: | 黄崇鑫,张凯锋,戴先中,张冠虎.含LC低通滤波器的VSC HVDC系统的新型控制策略[J].电力自动化设备,2011,31(3): |
| HUANG Chongxin,ZHANG Kaifeng,DAI Xianzhong,ZHANG Guanhu.Control strategy for VSC-HVDC system with LC low-pass filter[J].Electric Power Automation Equipment,2011,31(3): |
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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。 |
| 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 |
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| 基金项目:国家自然科学基金项目（50507002，60974036）；教育部博士点基金项目（20090092110020） |
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| Control strategy for VSC-HVDC system with LC low-pass filter |
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HUANG Chongxin1, ZHANG Kaifeng2, DAI Xianzhong3, ZHANG Guanhu4
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1.Key Laboratory of Measurement and Control of CSE，School of Automation， Southeast University，Nanjing 210096，China;2.Key Laboratory of Measurement and Control of CSE，School of Automation， Southeast University，Nanjing 210097，China;3.Key Laboratory of Measurement and Control of CSE，School of Automation， Southeast University，Nanjing 210098，China;4.Key Laboratory of Measurement and Control of CSE，School of Automation， Southeast University，Nanjing 210099，China
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| Abstract: |
| 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. |
| Key words: VSC-HVDC LC low-pass filter inverse system method variable structure control |
