电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2014年
2期
39-45
,共7页
苗世洪%马帅%尚亚男%姜臻%侯俊贤%于之虹
苗世洪%馬帥%尚亞男%薑臻%侯俊賢%于之虹
묘세홍%마수%상아남%강진%후준현%우지홍
输电断面%割点%邻近节点%路径搜索%最短路径
輸電斷麵%割點%鄰近節點%路徑搜索%最短路徑
수전단면%할점%린근절점%로경수색%최단로경
transmission section%cut-vertex%neighboring node%path search%shortest paths
提出了一种基于割点和路径搜索的输电断面快速识别方法。该方法依据过载支路切除后的潮流转移特征定义了输电断面,并借助图论中的割点和块以及最短路径等概念,深入分析了输电断面的拓扑特征;通过一系列的矩阵运算,在以断开支路为中心的块中搜索出断开支路两端点间的前k 条最短路径,并最终识别出受支路断开影响最严重的输电断面。文中在电网模型降维、k 值的优化选取和路径搜索方面均做出了重要改进,给出了k 的取值原则和利用邻近节点信息确定最短路径的方法,有效避免了关键支路漏选且可大大减少分析计算量,实现了输电断面的快速识别,为预防电网连锁故障引发的级联跳闸奠定了基础。在新英格兰39节点和IEEE 118节点系统上进行了仿真分析,结果验证了该方法的正确性和有效性。
提齣瞭一種基于割點和路徑搜索的輸電斷麵快速識彆方法。該方法依據過載支路切除後的潮流轉移特徵定義瞭輸電斷麵,併藉助圖論中的割點和塊以及最短路徑等概唸,深入分析瞭輸電斷麵的拓撲特徵;通過一繫列的矩陣運算,在以斷開支路為中心的塊中搜索齣斷開支路兩耑點間的前k 條最短路徑,併最終識彆齣受支路斷開影響最嚴重的輸電斷麵。文中在電網模型降維、k 值的優化選取和路徑搜索方麵均做齣瞭重要改進,給齣瞭k 的取值原則和利用鄰近節點信息確定最短路徑的方法,有效避免瞭關鍵支路漏選且可大大減少分析計算量,實現瞭輸電斷麵的快速識彆,為預防電網連鎖故障引髮的級聯跳閘奠定瞭基礎。在新英格蘭39節點和IEEE 118節點繫統上進行瞭倣真分析,結果驗證瞭該方法的正確性和有效性。
제출료일충기우할점화로경수색적수전단면쾌속식별방법。해방법의거과재지로절제후적조류전이특정정의료수전단면,병차조도론중적할점화괴이급최단로경등개념,심입분석료수전단면적탁복특정;통과일계렬적구진운산,재이단개지로위중심적괴중수색출단개지로량단점간적전k 조최단로경,병최종식별출수지로단개영향최엄중적수전단면。문중재전망모형강유、k 치적우화선취화로경수색방면균주출료중요개진,급출료k 적취치원칙화이용린근절점신식학정최단로경적방법,유효피면료관건지로루선차가대대감소분석계산량,실현료수전단면적쾌속식별,위예방전망련쇄고장인발적급련도갑전정료기출。재신영격란39절점화IEEE 118절점계통상진행료방진분석,결과험증료해방법적정학성화유효성。
This paper proposes an intelligent recognition method of transmission section based on cut-vertex and path search. The transmission section is defined according to the characteristics of power flow transfer after the overload branch is cut.By drawing on the conceptions of cut-vertex,block and the shortest path possible in the graph theory,this paper presents an in-deep analysis on the topological characteristic of the transmission section.Through a series of matrix operations,the proposed method will find out the k shortest paths between two nodes of the overload line in a block with overload with the overload line as its center,and finally recognize the transmission section suffering the greatest harm from branch outage.Considerable improvement in power network model dimensionality reduction is reported,and optimal selection of k and path searching algorithm,the value of k and the shortest path determination are given,effectively avoiding omission of the key branch,greatly reducing the analysis computation workload,achieving rapid recognition of the transmission section,and laying a foundation for preventing cascading tripping due to grid faults.Simulation results of a New England 3 9-bus testing system and an IEEE 1 1 8-bus testing system show the correctness and validity of the method.