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Fault analysis and main protection scheme of parallel lines transmission system considering weak-infeed effect
Author(s): 
Pages: 62-66,79
Year: Issue:  18
Journal: Relay

Keyword:  同杆线路弱馈跨线故障保护方案;
Abstract: 研究了带弱馈系统的同杆线路跨线故障的电气特征和保护响应特性,在异名相跨线故障时由于弱馈端电源支撑不足,非故障相反向电流穿越等原因可能造成保护选相失败,进而导致同杆线路同时三跳,引起终端变电站失压而损失大量负荷.分析了光纤差动保护和传输分相命令的纵联距离保护在不同故障条件下的响应特性,给出了跨线故障下保护误选相的处理措施,提出了提高选相可靠性的主保护配置方案.基于实际线路参数和主流厂家保护进行的RT...
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