【摘要】 分析了反映故障分量电流保护的动作特性、负荷波动及故障分量存在的时间及方向性,提出了采用基于不同原理的故障分量组合可解决选相、健全相电流影响动作的正确性,采用不同原理的方向元件及不同组合方式解决方向元件误动和拒动方案。更多还原

【Abstract】 This paper analyzes the operation characteristics of current protection on the fault components,the short existing time as well as directivity of load fluctuation and fault components.Then,it puts forward the combined use of fault components based on the different principles in order to avoid the influence of phase selection and non-fault-phase current on the operation correctness.Finally,it proposes a scheme that the directional elements on different principles and the various combination methods can be adopted to solve the directional elements’ maloperation and dynamic torque.更多还原