摘要
对珠海发电厂3号、4号机组采用GE发电机-变压器组保护实现双套主保护、双套后备保护的配置情况进行了介绍,详细论述了GE公司发电机-变压器组保护的双斜率、双拐点比例差动保护的特点及其电流互感器饱和检测判据、方向检测判据和谐波制动判据,阐明了GE发电机-变压器组保护方便实现大型机组的双主双后备保护配置。
This paper presents the dual-main and dual-backup generator-transformer relay scheme of Units 3 and 4 in Zhuhai Power Station, which is implemented by means of GE generator-transformer relay. It expatiates on the characteristics of dual-breakpoint/dual-slope percentage differential protection of GE generator-transformer relay and the current transformer saturation criterion, direction criterion, harmonic inhibit criterion. It is also pointed out that the dual-main and dual-backup generator-transformer relay scheme of large units can be implemented expediently by means of GE generator-transformer relay.
出处
《广东电力》
2007年第4期91-93,共3页
Guangdong Electric Power
关键词
GE发电机-变压器组保护
双拐点、双斜率比例差动保护
电流互感器饱和判据
谐波制动判据
GE generator-transformer relay
dual-breakpoint/dual-slope percentage differential protection
current transformer saturation criterion
harmonic inhibit criterion
