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电网技术  2013 

一种新型限流式统一潮流控制器的设计与研究

, PP. 2187-2193

Keywords: 统一潮流控制器,限流器,电路拓扑,参数设计

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Abstract:

限流式统一潮流控制器(unifiedpowerflowcontroller,UPFC)是一种能有效应对系统短路故障的新型柔性交流输电装置。为提高短路故障切除速度、降低装置成本,将基于集成门极换向晶闸管(integratedgatecommutatedthyristor,IGCT)的桥式限流器与UPFC结合起来,构建了一种新型限流式UPFC拓扑,分析了其短路限流工作原理,建立了短路数学模型。以系统限流指标、UPFC的功率模块安全限度、限流器模块IGCT电压电流限值和直流电容电压限值为依据,给出了限流电感和直流电容的参数设计方法。对新型限流式UPFC与已有装置的工作性能和主要元件参数选择进行了比较。PSCAD/EMTDC对比仿真表明,新型限流式UPFC减少了短路切除时间,减小了元件参数,降低了短路电流对电网的冲击。

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