电网技术
電網技術
전망기술
Power System Technology
2015年
4期
1045-1052
,共8页
陈晓玲%杨军%罗超%孙元章%刘明松%汤涌
陳曉玲%楊軍%囉超%孫元章%劉明鬆%湯湧
진효령%양군%라초%손원장%류명송%탕용
连锁故障%潮流转移%最短路径搜索%波纹扩散
連鎖故障%潮流轉移%最短路徑搜索%波紋擴散
련쇄고장%조류전이%최단로경수색%파문확산
cascading failures%power flow transferring%shortest path searching%ripple diffusing
在大电网中实现潮流转移路径的在线搜索,对于实时掌握系统薄弱环节和预防大电网连锁故障跳闸具有重要意义。提出了基于波纹扩散机理的潮流转移路径快速搜索方法,该方法首先将网络预处理为以附加代价为边权的形式,然后依据波纹从中心源以恒定速度向外扩散并最先到达与中心源距离最短点的最优化原则,通过模拟波纹扩散过程搜索出受潮流转移影响较大的前K条最短路径集。IEEE 118节点和IEEE 300节点系统的仿真结果表明,该方法搜索结果准确无误,计算时间明显小于传统算法,且 K 值越大,该算法时间优越性越好,能够快速扫描复杂大电网中的多个潮流转移区域,在线监测大电网潮流转移状态。
在大電網中實現潮流轉移路徑的在線搜索,對于實時掌握繫統薄弱環節和預防大電網連鎖故障跳閘具有重要意義。提齣瞭基于波紋擴散機理的潮流轉移路徑快速搜索方法,該方法首先將網絡預處理為以附加代價為邊權的形式,然後依據波紋從中心源以恆定速度嚮外擴散併最先到達與中心源距離最短點的最優化原則,通過模擬波紋擴散過程搜索齣受潮流轉移影響較大的前K條最短路徑集。IEEE 118節點和IEEE 300節點繫統的倣真結果錶明,該方法搜索結果準確無誤,計算時間明顯小于傳統算法,且 K 值越大,該算法時間優越性越好,能夠快速掃描複雜大電網中的多箇潮流轉移區域,在線鑑測大電網潮流轉移狀態。
재대전망중실현조류전이로경적재선수색,대우실시장악계통박약배절화예방대전망련쇄고장도갑구유중요의의。제출료기우파문확산궤리적조류전이로경쾌속수색방법,해방법수선장망락예처리위이부가대개위변권적형식,연후의거파문종중심원이항정속도향외확산병최선도체여중심원거리최단점적최우화원칙,통과모의파문확산과정수색출수조류전이영향교대적전K조최단로경집。IEEE 118절점화IEEE 300절점계통적방진결과표명,해방법수색결과준학무오,계산시간명현소우전통산법,차 K 치월대,해산법시간우월성월호,능구쾌속소묘복잡대전망중적다개조류전이구역,재선감측대전망조류전이상태。
ABSTRACT:It is significant for the real-time recognition of weak vulnerable spots in power grid and the prevention of trip outs due to cascading failures in large power grid to implement on-line searching of power flow transferring paths in large power grid. A ripple diffusing mechanism based fast searching method for power flow transferring paths is proposed. In the proposed method, firstly, the power network is pre-processed into such a network, in which the additional cost is taken as the edge weight; secondly, according to the principle of optimality that the ripple outwards diffuses from the center of the source with constant speed and first arrives at the point with the shortest distance to the center of the source, the top K shortest path set that is greatly impacted by power flow transferring is searched by simulating the process of ripple diffusing. Simulation results of IEEE-118 bus system and IEEE-300 bus system show that the searching results by the proposed method is accurate and the computing time is obviously shorter than by traditional algorithm, and the bigger the value of K the more efficient the proposed algorithm is. Using the proposed searching method, multi power flow transferring areas in complex large power grid can be fast scanned, thus the real-time monitoring of power flow transferring condition in large power grid can be implemented.