The Research Of Relay Protection Method Based On Rizhao Harbor Electric Power System And Short Line

Based on the larger-area system short-circuit and relay protection fault without knowing reason of Rizhao Harbor power supply system, we draw out a project. Through the load current,short circuit current and the relay protection setting calculation for every circuit of the whole power network ,analyzing the typical accident, meanwhile, reasonably using the Industry and Civil Power Supply Designation Manual, giving attention to the requirements of relaying protection, we provide a more reasonable protection configuration suggestion. This forms a unity of the protective equipment and type selection to power network configuration and setting coordination that ensures the safe operation of power network extremely. It aims at summing up the practical problems and resolved methods during the short-line protection application, to build foundation of reliable operation on power supply system protection, and to improve the reliable operation of power network.