CAJ | 학술논문

在110 kV完整内桥双线单主变变电所中，当无主变的母线或其进线到该母线任一点发生永久性故障时，存在投于故障母线的安全隐患，此时可采用桥开关备自投方式、且仅投入无主变母线对有主变母线的自投方式，因此主变只能由同一母线的进线供电。提出一种无主变母线不含母线压变、不含相应进线开关的110 kV特殊内桥双线单主变接线及其110 kV备自投工作原理，针对各类110 kV设备故障分析，表明该方案可消除上述安全隐患，并且可由任一进线供电，便于灵活安排运行方式。
재110 kV완정내교쌍선단주변변전소중，당무주변적모선혹기진선도해모선임일점발생영구성고장시，존재투우고장모선적안전은환，차시가채용교개관비자투방식、차부투입무주변모선대유주변모선적자투방식，인차주변지능유동일모선적진선공전。제출일충무주변모선불함모선압변、불함상응진선개관적110 kV특수내교쌍선단주변접선급기110 kV비자투공작원리，침대각류110 kV설비고장분석，표명해방안가소제상술안전은환，병차가유임일진선공전，편우령활안배운행방식。
In 110 kV complete inner-bridge double-connection substation with single main transformer , when a permanent fault of bus without main transformer or of the incoming line occurs at any point of the bus , there exist security risks in the faulty bus, in which BZT (standby power supply automatic switching ) of bridge-switch should be adopted for the bridge-switch operation mode only reserving power source for the bus with the transformer of BZT. Therefore , the transformer is only supplied by the line with the transformer. The paper suggests a 110 kV special inner-bridge connection substation with single transformer, in which the bus without the transformer containing no potential transformer and the corresponding line switch and the work principle of the 110 kV BZT are proposed. The paper also analyzes various faults in 110 kV devices to show that the scheme can get rid of potential hazards above and the power can be supplied through any incoming line, which is convenient for flexible arrangement of operating modes.