The Study Of Sichuan Electrical Power System Carrier Wave Protection Action Analysis As Bypass Breaker Operating

In high voltage power transmission line, in order to ensure power system juxtaposition operation'stability and bump feeding power up against, at a great many instance,without delay from line's terminal excision by the protected line interior fault. Here, both electric current protection and distance protection neither be able to satisfaction require, whereas none but pilot protection could realize complete line rapid trip off, the stability and bump feeding power, reduce fault bring about' spoil degree, improvement cooperateing performance with backup protection . Bypass breaker usually operate instead of line breaker in power system , considering the type of bypass breaker's carrier wave protection is different from the one of line versus side carrier wave protection,both protection's theory and stop signal, send signal logic have got differentiate, in order to ensure power network stabilize operation , line rapid protection must be run, so it is necessary to validate from protection theory and proceeding test the internal fault condition that the protection in both side of the line is different. These character based on SiChuan power network's practice operation experience, in allusion to the config of the carrier wave protection in bypass breaker operating , through the study of protection's typical config:one side LFP-902A , one side CSL-101A, proceeded comprehensive act module test,noted plenty of first hand test data and wave picture ,proceeded detailed theory analyses, plenitude demonstration atresic type carrier wave distance protection when twain side atresic type logic is not completely same, basicallycan fill power network's requirement to relay of reliability selectivity speedly and sensitively. At the same time , we have discovered some bug in cooperate between the two type protection , analyzed different result in different condition as config with different logic protection , show that the incorrect relay act result from these bug only appear when line is in incompletely phase operation and occur fault , furthermore the mass computer protection have comprehensive incompletely phase logic, so this condition can not seriously threaten the power system.The research on bypass carrier wave protection not only possess his theory value-studied protector'high frequency signal as well as and dispatch signal logic, penetrate into learn protector'occlusion type carrier wave protection logic about, but also has important signality in fact 梡rovide practice system operation scheme with theory and test evidence. For power system safe and steady operation, it is very useful to insure properly make a set of rapid protection service.