摘要
用电压相量图法讨论距离继电器的正序极化电压。针对长距离大负荷线路,分析比较了各种不对称故障前后的母线电压和母线正序电压相位变化情况,提出采用母线正序电压作为距离继电器的极化电压,在靠近距离继电器整定点以外附近处,发生经过渡电阻故障时,可有效减少和避免距离继电器超越动作范围。
Positive-sequence polarized voltage of distance relay is discussed with voltage phasor diagram method. The phase angle variation of bus voltage and bus positive-sequence voltage before and after the various asymmetrical faults for longdistance and heavy-load lines are analyzed and compared. The bus positive-sequence voltage is adopted as polarized voltage of distance relay, which can effectively reduce and avoid overreach of distance relay when the grounding fault via fault resistance occurs near the setting point of the distance relay.
出处
《电力系统自动化》
EI
CSCD
北大核心
2010年第1期51-54,共4页
Automation of Electric Power Systems
关键词
距离继电器
正序电压
极化电压
distance relay
positive-sequence voltage
polarized voltage
