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Problem about Applying Load Limit Curve and Setting Calculation Thereof
Author(s): ZHU Xiaohua, ZHANG Zuohong
Pages: 49-
53
Year: 2010
Issue:
3
Journal: Guangdong Electric Power
Keyword: 继电保护装置; 纵联距离测量元件; 负荷限制; 电网潮流;
Abstract: 针对1组较长500 kV双回线路距离保护Ⅱ、Ⅲ段定值无法保证足够灵敏度和躲过最小负荷阻抗的问题,提出通过投入线路继电保护装置所提供的负荷限制距离特性曲线的方法来解决,并给出了国内常用的220~500kV线路各型号继电保护装置的负荷限制特性定值和纵联距离测量元件电阻定值的计算方法.在实际运用中,该整定计算方法可以在电网潮流发生大范围转移时保证后备保护不误动作,避免引发连锁反应和扩大电网事故.
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