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全世界的电网大事故,无一例外都与继电保护动作正确与否直接或间接相关。如果继电保护不能正确动作,非但不能充当电网安全第一道防线,还会为扩大事故推波助澜。这么一个从电力系统诞生就已存在的世界性技术难题,它对电网安全、国家安全的意义毋庸置疑,却一直未被攻克。而世界上已经发生的多起大停电事故,均由于过负荷引起非故障线路距离保护动作,造成事故范围扩大。2012年印度“7·30”大停电后,一个人跟他的老朋友——中国电科
The world’s major power grid accidents, without exception, are directly or indirectly related to the relay protection action is correct or not. If the relay can not act correctly, not only can it not act as the first line of defense for grid security, but it will also fuel the expansion of the accident. Such a global technical problem that has existed since the birth of the power system has no doubt about the significance of grid security and national security but has never been overcome. In the world, a large number of blackout accidents have occurred, which lead to non-fault line distance protection due to overloading, resulting in an increased accident range. After the blackout in India’s “7 · 30” in 2012, a man and his old friend, ChinaElectronics