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电网技术  2009 

多端VSC-HVDC用于风电场联网时的控制策略

, PP. 135-140

Keywords: 双馈感应电机(DFIG),多端电压源换流器高压直流输电(MVSC-HVDC),风电场联网,控制策略

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Abstract:

基于双馈感应电机(doublefedinductiongenerator,DFIG)控制策略,提出了多端电压源换流器高压直流输电(multi-terminalVSC-HVDC,MVSC-HVDC)用于风电场并网的联网方式,设计了相关的控制策略,通过与传统交流联网方式相比,指出了MVSC-HVDC的可行性和合理性。在PSCAD/EMTDC的仿真环境下,建立了相关的数学模型,研究了风电场之间及其内部机组在系统稳态和故障情形下的运行情况。仿真结果表明DFIG的等效模型能够正常稳定的工作,所提出的并网方式和控制策略是正确和有效的;风电场之间以及风电场内部各机组之间都独立运行,互不影响;当逆变侧交流系统发生故障时,该控制策略有较快的恢复特性,可有效抑制风机投切带来的冲击。

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