电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2014年
14期
49-54,61
,共7页
主动解列%广域测量系统%同调识别%解列断面搜索%电力系统
主動解列%廣域測量繫統%同調識彆%解列斷麵搜索%電力繫統
주동해렬%엄역측량계통%동조식별%해렬단면수색%전력계통
controlled islanding%wide area measurement system (WAMS)%coherency identification%islanding surfaces searching%power systems
电力系统主动解列是避免发生大停电事故和系统崩溃的有效保护措施，需要及时、准确地确定解列方案。文中提出一种考虑发电机同调约束的最佳解列断面的搜索方法。首先基于故障后广域测量系统(WAMS)提供的实时动态响应信息，利用改进拉普拉斯特征映射算法在线识别同调机群，利用发电机同调虚拟节点聚合同调机群，减小解列断面的搜索空间，然后利用加权拉普拉斯分群策略得到初始的解列断面。最后考虑断面有功功率的方向，利用启发式变邻域搜索算法确定最佳的解列断面，使得解列后各孤岛的净不平衡功率最小。文中方法能充分考虑不同故障模式所带来的同调行为的差异性，使得主动解列控制具有选择性和鲁棒性。通过新英格兰39节点系统验证了所述方法的有效性和适应性。
電力繫統主動解列是避免髮生大停電事故和繫統崩潰的有效保護措施，需要及時、準確地確定解列方案。文中提齣一種攷慮髮電機同調約束的最佳解列斷麵的搜索方法。首先基于故障後廣域測量繫統(WAMS)提供的實時動態響應信息，利用改進拉普拉斯特徵映射算法在線識彆同調機群，利用髮電機同調虛擬節點聚閤同調機群，減小解列斷麵的搜索空間，然後利用加權拉普拉斯分群策略得到初始的解列斷麵。最後攷慮斷麵有功功率的方嚮，利用啟髮式變鄰域搜索算法確定最佳的解列斷麵，使得解列後各孤島的淨不平衡功率最小。文中方法能充分攷慮不同故障模式所帶來的同調行為的差異性，使得主動解列控製具有選擇性和魯棒性。通過新英格蘭39節點繫統驗證瞭所述方法的有效性和適應性。
전력계통주동해렬시피면발생대정전사고화계통붕궤적유효보호조시，수요급시、준학지학정해렬방안。문중제출일충고필발전궤동조약속적최가해렬단면적수색방법。수선기우고장후엄역측량계통(WAMS)제공적실시동태향응신식，이용개진랍보랍사특정영사산법재선식별동조궤군，이용발전궤동조허의절점취합동조궤군，감소해렬단면적수색공간，연후이용가권랍보랍사분군책략득도초시적해렬단면。최후고필단면유공공솔적방향，이용계발식변린역수색산법학정최가적해렬단면，사득해렬후각고도적정불평형공솔최소。문중방법능충분고필불동고장모식소대래적동조행위적차이성，사득주동해렬공제구유선택성화로봉성。통과신영격란39절점계통험증료소술방법적유효성화괄응성。
Power system controlled islanding is an effective protection measure to avoid power system blackouts and system breakdown.It is necessary to determine the islanding scheme promptly and accurately. Based on generator coherency constraint,a searching method for the optimal islanding scheme is proposed.First,an improved Laplacian Eigenmap algorithm is used to identify the coherent generators according to the real-time dynamic post-fault trajectories obtained by wide area measurement system (WAMS).The network simplified graph with reduced searching space is then obtained by aggregating coherency generators using coherent generator virtual nodes.The extended Laplace partition strategy is applied to obtain the preliminary islanding surfaces.At last,by considering power flow directions,a variable neighborhood heuristic searching algorithm is used to search for the optimal islanding surfaces with the minimal net power imbalance within the islands. Simulations on the New England 39-bus system validate the effectiveness and flexibility of the approach proposed.The differences of coherent behavior by different fault modes are fully considered.This ensures the controlled islanding strategy with high selectivity and robustness. This work is supported by Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) of China (No.201000091 10025) and Fundamental Research Funds for the Central Universities (No.201 1YJS274).
