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电网技术  2015 

故障限流与电能质量复合控制系统及其运行机理

DOI: 10.13335/j.1000-3673.pst.2015.05.027, PP. 1351-1357

Keywords: 限流器,统一电能质量控制器,电能优化,配合限流,限流电抗

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Abstract:

为了解决传统限流器长期闲置,利用率低下的问题,提出了一种具有电压波动抑制、电网谐波治理等电能质量控制功能的故障限流与电能质量复合控制系统。该新型拓扑结构在统一电能质量控制器的输入、输出端分别接入反并联双向晶闸管,当电网发生短路故障时,触发反并联晶闸管导通,故障相对应的输入端和输出端滤波电抗器分别串联和并联接入电网,从而实现对故障电流的限制。分析了故障限流与电能质量复合控制系统的工作原理,并建立了限流模式时的数学模型,详细阐述了主限流支路和分流限流支路相配合实现合理限流的机理。PSCAD/EMTDC仿真结果验证了提出的故障限流与电能质量复合控制系统的可行性。

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