CAJ | 학술논문

智能配电网的出现使配电网保护技术面临新的挑战，为此提出一种适用于智能配电网的馈线保护算法。该算法结合图论知识，对配电网的有向图进行分析，把所有智能电子设备(IED)分成互联组和后备互联组，利用IED采集的故障信息实现故障的定位和隔离，原理简单，所需信息量少。研究了网络结构变化、IED拒动、断路器失灵等异常情况给馈线保护算法带来的影响，提出相应的容错算法应对这些异常情况。算例分析结果表明：算法对故障区段的判断结果准确，且能够应对网络结构变化和异常情况的发生。
지능배전망적출현사배전망보호기술면림신적도전，위차제출일충괄용우지능배전망적궤선보호산법。해산법결합도론지식，대배전망적유향도진행분석，파소유지능전자설비(IED)분성호련조화후비호련조，이용IED채집적고장신식실현고장적정위화격리，원리간단，소수신식량소。연구료망락결구변화、IED거동、단로기실령등이상정황급궤선보호산법대래적영향，제출상응적용착산법응대저사이상정황。산례분석결과표명：산법대고장구단적판단결과준학，차능구응대망락결구변화화이상정황적발생。
Appearance of smart distribution system makes protection technology face new challenges, a feeder protection algorithm based on graph theory for smart distribution system is proposed. Using graph theory, analyzing directed graph of distribution network, dividing all IEDs into interconnected group and reserve interconnected group, the fault section can be diagnosed and isolated through fault overcurrents information from IED, the principle is simple and less information is required. Impacts of such abnormal conditions as misfunction of IED or circuit breaker and the change of network topology are discussed. To cope with abnormal conditions the fault-tolerance algorithms are given. The result of case show that the fault estimation results are exact and immune against abnormal conditions.