CAJ | 학술논문

光纤通道的误码率和通道双向延时一致性是影响纵差保护性能的重要因素。提出利用线路集中参数模型计算电压相角差以识别通道双向延时一致性的方法。在单通道条件下,提出纵联短帧结合纵差长帧传送,并根据通道状况自动实现纵差和纵联保护无缝切换机制。试验表明该机制大大减少主保护退出时间,提高了保护的可靠性。
광섬통도적오마솔화통도쌍향연시일치성시영향종차보호성능적중요인소。제출이용선로집중삼수모형계산전압상각차이식별통도쌍향연시일치성적방법。재단통도조건하,제출종련단정결합종차장정전송,병근거통도상황자동실현종차화종련보호무봉절환궤제。시험표명해궤제대대감소주보호퇴출시간,제고료보호적가고성。
The error code ratio and the coherence of bi-directional channel time-delay of fiber channel are two important factors influencing performances of longitudinal differential protection.A method for recognizing the coherence of bi-directional channel time-delay by using difference between voltage phase angles calculated with line lumped-parameter model is proposed.In circumstance of single channel,two transmission rules,i.e.short frame fit for pilot protection and long frame fit for longitudinal differential protection,are combined,so that the seamless handover between the two kinds of protections can be automatically implemented according to the channel＇s circumstance.The tests show that the seamless handover scheme can significantly reduce the exiting time of main protection,thus improve the reliability of protection.