| According to the electric power system development, the operational power stations usually need to take into the extension. While designing the main bus connection, we should in consideration of the possibility of the extension, and reduce the influence to the power supply as far as possible.In earlier period, the few circuits power station can adopt double bus.By the load growth, the circuits are more and more, the double bus can be reform into sectional double bus.The 220kV Zhuyuan power station is an important gate of Foshan city for implementing the west to east strategic. And its load increase quickly these years. In summer high load period, transformers in this station had overload, so it's urgent to take into the extension.Compared with double bus, sectional double bus is more reasonable in arrangement of power sources and load, more simple to operate, and more selectivity of busbar differential protection in short-circuit.This article carries on the comparison to the operation characteristic of double bus and sectional double bus, analyze the advantage of sectional bus, and research the reform tactics for busbar differential protection.By the reform of the main bus connection, we should pay attention to the change of operation mode, reconsider the bus protection scope, and edit the operation rules.When we reform the bus protection, we should make an equipment withdraw plan and working guide to raise the work efficiency.This article investigates how to put the new equipment into use. According to the application in the reform engineering of Zhuyuan power station, this article verifies the possibility and function of the reform tactics. |
