CAJ | 학술논문

提出了一种基于灰色关联度的站域保护原理。以舍弃基波相量体系为出发点，提出了基于灰色关联度的新型保护算法，该算法不要求CT变比一致，具有天然抗CT饱和能力。基于此算法，阐述了站域保护原理的具体实现过程，并详细分析了保护原理抗 CT 饱和的原因、数据窗选择、CT断线对策以及断路器失灵跳闸逻辑。最后基于PSCAD搭建典型站域系统进行大量仿真，利用 Matlab 进行灰色关联度分析。结果表明：站域保护原理利用故障后10 ms内的数据，能快速准确识别区内外故障；区外故障 CT 线性传变区为2 ms时，保护原理依然可靠不动作，具有很强的安全性。
제출료일충기우회색관련도적참역보호원리。이사기기파상량체계위출발점，제출료기우회색관련도적신형보호산법，해산법불요구CT변비일치，구유천연항CT포화능력。기우차산법，천술료참역보호원리적구체실현과정，병상세분석료보호원리항 CT 포화적원인、수거창선택、CT단선대책이급단로기실령도갑라집。최후기우PSCAD탑건전형참역계통진행대량방진，이용 Matlab 진행회색관련도분석。결과표명：참역보호원리이용고장후10 ms내적수거，능쾌속준학식별구내외고장；구외고장 CT 선성전변구위2 ms시，보호원리의연가고불동작，구유흔강적안전성。
A new substation area protection principle based on gray correlation degree is proposed. In order to abandon the fundamental phasor system, a new protection algorithm based on gray correlation degree is proposed, which is not affected by CT ratio, and has a natural anti-CT saturation capacity. Besides, the realization method of substation area protection based on the algorithm is discussed, and the reason of anti-CT saturation, selection of the data window, scheme of disconnection fault of CT and tripping strategy of breaker failure are also analyzed here. Finally, a substation area simulation model is constructed by PSCAD, the results of gray correlation degree analysis by Matlab show that the method of substation area protection can identify the internal & external faults quickly and accurately based on the fault data within 10 ms, and when the time of current transformer linear transmission area is 2 ms, the protection principle is still reliable, and has high safety performance.