CAJ | 학술논문

使用ETAP仿真软件对含有三机组的6 kV变电站，发生进线断路器误跳故障和进线三相短路故障时的双电源快速切换过程进行分析。仿真结果表明，进线断路器误跳故障时的工作母线残压可能上升超过系统正常电压，相角差超过典型整定值20°。进线三相短路故障时的工作母线电压下降得很低以至于不满足快速切换判据，切换时间太长。因此，在快速切换判据中增加工作母线电压上限约束为1.1倍额定电压，相角差可以整定为23°~30°。在进线三相短路故障时增加残压切换判据检验，并采用同时切换方式，缩短了切换时间。
사용ETAP방진연건대함유삼궤조적6 kV변전참，발생진선단로기오도고장화진선삼상단로고장시적쌍전원쾌속절환과정진행분석。방진결과표명，진선단로기오도고장시적공작모선잔압가능상승초과계통정상전압，상각차초과전형정정치20°。진선삼상단로고장시적공작모선전압하강득흔저이지우불만족쾌속절환판거，절환시간태장。인차，재쾌속절환판거중증가공작모선전압상한약속위1.1배액정전압，상각차가이정정위23°~30°。재진선삼상단로고장시증가잔압절환판거검험，병채용동시절환방식，축단료절환시간。
Fast-transfer-processes-of-double-power-supplies-are-analyzed-by-help-of-ETAP-simulation-software,-when-incoming-line-circuit-breaker-false-tripping-fault-and-incoming-line-three-phase-short-circuit-fault-happen-in-a-6-kV-substation-containing-3-component-flue-gas-expender-train.-The-simulation-results-show-that,-the-residual-voltage-of-operating-bus-likely-rises-more-than-normal-system-voltage-in-the-incoming-line-circuit-breaker-false-tripping-fault-event,-and-the-phase-angle-difference-is-more-than-the-typical-20-degrees.-The-operating-bus-voltage-drops-in-the-incoming-line-three-phase-short-circuit-fault-event-and-is-too-low-to-meet-the-fast-transfer-criteria,-and-the-transfer-time-is-too-long.-Thus-the-operating-bus-voltage-upper-limit-of-1.1-times-rated-voltage-is-added,-and-the-setting-values-of-the-phase-angle-difference-is-properly-23~30-degrees.-The-residual-pressure-switch-criterion-inspection-is-added-in-the-incoming-line-three-phase-short-circuit-fault,-and-works-under-simultaneous-switching-mode-to-shorten-the-transfer-time.