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Several Sensitivity Analyses of Pilot Protection
Author(s): 
Pages: 3054-3058
Year: Issue:  z1
Journal: East China Electric Power

Keyword:  Transmission linesCurrent differential protectionThe normalizedProtection criterionSensitivity;
Abstract: 分析了基于工频正弦量的全电流差动保护判据、基于故障分量的差动保护判据、基于故障分量和全电流的复式比率差动保护判据等四种判据的基本原理.针对常规电流差动保护易受故障过渡电阻等影响的缺点,同时为加强差动保护的动作灵敏度,对基于故障分量采样值电流差动保护的原理、判据、动作特性等作了讨论,通过MATLAB的仿真与分析,结果表明基于故障分量的电流差动保护在可靠性、灵敏度方面明显优于常规电流差动保护.
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