摘要
在大多数天气和系统条件下,使用电气设备动态热容量监测系统将有可能增加线路的输电容量,并可降低极端条件下的故障率。美国电气研究协会(EPRI)开发的线路动态热容量监测系统(DTCR)将实时负荷数据与气象资料结合起来,计算线路动态负荷。与以前所用的保守静态负荷不同,它通过分析某一线路的真正传热限制,不仅能使系统操作员在用电高峰时抓住时机提高线路的输电能力,还可避免出现意外情况时进行不必要的减负荷操作。本文详细介绍DTCR及其软件的功能、特点及其在几大电力公司的现场运行试验情况。
Dynamic thermal rate monitoring systems for power equipment make it possible to increase the loading oftransmission lines under most weather and system conditions and to reduce the risk of failure under unfavorable conditions.A new kind of dynamic thermal circuit ratings(DTCR) now available from The Electric Power Research Institute(EPRI)in the United States incorporates real-time load and weather data from relatively inexpensive monitoring technology tocalculate such dynamic ratings, which are far more realistic than the conservative static ratings normally used. By reveal-ing a circuits true thermal limit, the DTCR lets system operators move more power with little additional investment inequipment: they not only can seize opportunities to deliver more electricity during high demand periods but also canavoid unnecessary load shedding when contingencies arise. This paper describes the functions and features of DTCRs indetail, as well as their field application experiences.
关键词
动态负荷监测系统
输电线路
导线热容量
dynamic thermal circuit rating
transmission line
thermal capacity
