CAJ | 학술논문

基于发生在普洱换流站的一起由于测量总线故障而导致的跳闸，深入分析西门子直流保护预告警导致测量总线切换的逻辑和时序。西门子直流保护预告警会在保护出口前3 ms发出并切换测量总线，此时如果仅一路测量总线有故障，在切换以后将避免跳闸。但此次跳闸之前总线已经完成切换，本不应该发生跳闸。由于该保护功能中的特殊取平均值的模块，在总线切换后测量值仍然高于门槛值，导致跳闸出口。针对此设计缺陷，提出对保护软件的修改意见以及实际修改措施。
기우발생재보이환류참적일기유우측량총선고장이도치적도갑，심입분석서문자직류보호예고경도치측량총선절환적라집화시서。서문자직류보호예고경회재보호출구전3 ms발출병절환측량총선，차시여과부일로측량총선유고장，재절환이후장피면도갑。단차차도갑지전총선이경완성절환，본불응해발생도갑。유우해보호공능중적특수취평균치적모괴，재총선절환후측량치잉연고우문함치，도치도갑출구。침대차설계결함，제출대보호연건적수개의견이급실제수개조시。
The logic and timing of how Siemens DC protection pre-warning makes TDM bus switchover is deeply analyzed based on a trip caused by TDM bus fault in Puer converter station. Siemens DC protection pre-warning will be sent out 3 ms before protection output and TDM bus switchover is also carried out; if there is just one bus fault, the trip will be avoided after TDM bus switchover. However, the TDM bus has been switched over before the trip which should not have happened. Trip happens because the measured value of the module that takes an average in this protection function is still higher than the threshold value after TDM switchover. For this design defect, modification suggestion about the protection software and actual modification measures are given.