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电网技术  2007 

电压源换相高压直流输电对改善风电场电压稳定性的作用

, PP. 27-31

Keywords: 电压波动,电压源换流器,高压直流输电(HVDC),无功功率,控制器,并网风电场

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Abstract:

并网风电场无功功率的波动会引起系统电压波动。在风电场混合并网系统中,通过电压源换相高压直流输电可以控制系统中的无功功率、抑制并网公共点的电压波动。文章研究了换流站无功功率控制器和定电压控制器对改善并网风电场电压稳定性的作用。基于电磁暂态软件PSCAD/EMTDC建立了并网风电场模型、电压源换相高压直流输电模型及其控制系统模型。仿真结果验证了上述控制器的正确性和可行性,表明采用定电压控制器的并网系统能更好地抑制电压波动,采用无功功率控制器的并网系统具有更好的风电场并网性能。

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