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Influence of directional overcurrent protection setting on sensitivity and reliability
Author(s): 
Pages: 21-23
Year: Issue:  15
Journal: RELAY

Keyword:  方向电流保护整定计算功率方向继电器灵敏度可靠性;
Abstract: 为提高供电的可靠性,需要采用方向电流继电保护,并且灵敏度要高.探讨了方向电流保护的整定对灵敏度及可靠性的影响,包括谐波、功率方向继电器等的影响,还探讨了一些新的整定计算方法及灵敏度、可靠性研究方面的新动向.方向电流保护的整定除满足电流整定一般原则外,还应考虑负荷电流突然增大、故障电流零序分量及与相邻线路保护的灵敏系数配合等因素.另外,可优先采用在线整定.方向继电器的内角需合理整定.谐波滤除中数字滤波器应用越来越多,较快的滤波算法意味着实时性好、可靠性高.
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