发电厂高压厂用电系统的安全与稳定性研究

Study on Security and Stability of High Voltage Auxiliary Power System of Power Plant

随着超临界大容量机组的普及,发电厂高压厂用电系统在设计时需要考虑其安全与稳定性方面的问题。本文分别从厂用电电压等级选择、厂用电系统中性点接地方式的选择、厂用电的继电保护、集成化的多功能综合继电保护装置的应用及厂用电电源快切装置发展等方面,论述了厂用电系统优化设计时需要注意的一些细节问题,为提高大型火电、核电、水电发电厂厂用电系统的安全与稳定性奠定了基础。

The supercritical capacity units are popularized in China now, the security and stability of high voltage auxiliary power system of power plant need to be taken into account when designing the auxiliary power system. This paper discusses some detailed questions of designing the auxiliary power system from four aspects of the voltage level choice, choosing neutral ground of auxiliary power system, relay protection, integration multi-function relay protection applying, electrical source quick switch device. The purpose of the paper is to provide basis for improving the security and stability of high voltage auxiliary power system of supercritical capacity thermal power plant, nuclear power plant and hvdro-oower station.