VSC-HVDC稳定控制研究
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摘要
基于电压源换流器(voltage-source converter,VSC)的高压直流输电系统(highvoltagedirectcurrent,HVDC)拥有良好的有功无功功率控制能力以及更适合构成多端输电系统的优势,目前被认为是极具潜力的输电方式。柔性直流输电系统的控制及稳定性是影响输电系统运行安全和性能的重要因素。针对柔性直流输电系统的研究,首先概述了两端柔性直流输电系统的拓扑及其解耦控制和附加控制方式,然后从基本的两端拓扑结构延伸到多端输电系统拓扑和混合输电系统拓扑,着重分析了多端系统的下垂控制、故障穿越能力和混合直流输电系统的控制,接着又讨论了风电接入之下的柔性直流输电系统的稳定性及控制,可为今后相关研究提供参考。
Voltage source converter based high voltage direct current(VSC-HVDC) transmission systems has the advantages of good active and reactive power control capability and more suitable for multi-terminal transmission system. It is considered as a potential transmission mode.Research on control and stability of VSC-HVDC is an important factor affecting the safety and performance of transmission system. Aiming at the study of control strategies of VSC-HVDC systems, the topologies and decoupling and additional control methods of VSC-HVDC were analyzed. Then it extends from the basic two-terminal topologies to the multi-terminal and hybrid topologies, focus on the droop control, fault ride through capability of VSC-MTDC and control of hybrid direct current transmission system. Next, this paper discussed the stability and control schemes of VSC-HVDC for wind power integration, which will provide reference for future research.
Voltage source converter based high voltage direct current(VSC-HVDC) transmission systems has the advantages of good active and reactive power control capability and more suitable for multi-terminal transmission system. It is considered as a potential transmission mode.Research on control and stability of VSC-HVDC is an important factor affecting the safety and performance of transmission system. Aiming at the study of control strategies of VSC-HVDC systems, the topologies and decoupling and additional control methods of VSC-HVDC were analyzed. Then it extends from the basic two-terminal topologies to the multi-terminal and hybrid topologies, focus on the droop control, fault ride through capability of VSC-MTDC and control of hybrid direct current transmission system. Next, this paper discussed the stability and control schemes of VSC-HVDC for wind power integration, which will provide reference for future research.
引文
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