CAJ | 학술논문

针对电网的连锁故障,提出了一种基于图论的模式搜索方法.根据实时的网络拓扑结构和潮流运行方式,建立系统潮流状态图.在供电通道包含的支路中确定初始故障,利用图论方法,搜索下一条可能的开断支路.搜索过程中考虑保护动作不确定性的影响,并交替进行潮流和稳定计算,以保证搜索结果的合理性.该方法实现对电网连锁故障快速全面预测搜索,且对具有相同潮流状态图的潮流运行方式,只需根据通道潮流变化对搜索到的连锁故障模式进行局部的修正就可满足要求,大大降低连锁故障模式对潮流状态的敏感度.对IEEE 10机39节点系统进行分析计算,结果验证了该算法的有效性和实用性.
침대전망적련쇄고장,제출료일충기우도론적모식수색방법.근거실시적망락탁복결구화조류운행방식,건립계통조류상태도.재공전통도포함적지로중학정초시고장,이용도론방법,수색하일조가능적개단지로.수색과정중고필보호동작불학정성적영향,병교체진행조류화은정계산,이보증수색결과적합이성.해방법실현대전망련쇄고장쾌속전면예측수색,차대구유상동조류상태도적조류운행방식,지수근거통도조류변화대수색도적련쇄고장모식진행국부적수정취가만족요구,대대강저련쇄고장모식대조류상태적민감도.대IEEE 10궤39절점계통진행분석계산,결과험증료해산법적유효성화실용성.
Based on the graph theory, a new search method for power system cascading failures was proposed.Ac-cording to real-time information of networks topology and load flow, the state graph of power system was estab-lished with divided substations service areas and transmission passages.Through the initial fault line included in transmission passage, the next key transmission line, which was suffered greatly from the outage line, was quickly found out by using the graph-theory-based approach.In the searching process, the behaviors of protective relays were taken into account, and the power flow and stability calculations were alternatively conducted to quickly find out the kind of power system cascading failures modes, which were easy to occur and lead to serious consequences.Using the proposed method, the cascading failures modes were quickly found out and the searching process was ra-tional by means of adding the behaviors of protective relays.At the same time, wihout searching again, the casca-ding failures modes with the same state graph of power system only needed to be revised partly based on the changed power flow, which was not sensitive to the power flow.IEEE 39-bus test system shows that the developed method is correct and efficient for searching cascading failures modes in power system.