紫坪铺电厂220 V/1000 Ah直流系统改造

Discussion on the Transformation of 220 V/1000 Ah DC System in Zipingpu Power Plant

水力发电厂直流系统作用是给信号设备、保护、自动装置、事故照明、应急电源及断路器分、合闸操作提供直流电源,是水轮发电机组控制、保护的基础,特别在水力发电厂失去外部交流电源的特殊情况下,是保证机组及时黑启动成功的关键。文章介绍了紫坪铺电厂直流设备的升级改造,对升级前后直流系统运行情况进行了分析比较。

The function of the DC system of a hydroelectric power plant is to provide DC power for signal equipment,protection,automatic devices,emergency lighting,emergency power,and circuit breaker opening and closing operations.It is the basis for the control and protection of hydroelectric generating units,especially in hydroelectric power plants.In the special case of external AC power supply,it is the key to ensure the unit’s successful black start in time.The upgrade and transformation of the DC equipment of Zipingpu Power Plant are introduced,and the operation of the DC system before and after the upgrade is analyzed and compared.