对SXH-181型保护装置四边形特性原理的分析

Analysis of quadrangle characteristic theory of SXH-181 type protection equipment

针对SXH-181数字型馈线保护装置的整定原则和保护原理,指出了该种保护原理和整定原则存在的主要问题和小区整定的缺陷,并提出了有效的解决方案。利用谐波、线路阻抗和负荷阻抗等概念进行了深入细致的分析,并对保护装置整定原则和逻辑图进行了修改,满足了现场实际需要。

Against the setting principles and tenets of protection of the digital feeder protection device, SXH-181, this paper indicates the major problems of this principle and some defects in small area setting, and proposes the effective solutions. Some in-depth and detailed analysis has done by the concept of harmonic, line impedance and load impedance. The setting principles and logic diagrams of protection device are modified, which can meet the actual needs.