自适应零序电流速断保护中实时计算系统参数算法仿真与研究

Simulation and Study on the Algorithm of Real-Time Calculation on System Parameters for Adaptive Zero-Sequence Current Fast-Tripping Protections

针对传统零序电流速断保护[1]的灵敏度受系统运行方式变化和接地短路类型影响的局限性,提出了实时检测系统参数来实现自适应式零序电流速断保护。文中以计算系统等值零序内阻抗为例,并通过仿真研究证实了方法的有效性和可行性。

Aimed at the limitation of the sensitivity of the fast-tripping zerosequence current protections affected by varieties of system operation conditions and by differences of grounded fault types, this paper presents a feasible design of real time calculation on system parameters to realize the adaptive fast tripping zero-sequence current protections. The proposed approach uses in real-time calculating system internal equivalent zero-sequence impedance to verify effectiveness and feasibility with simulation studies.