电网技术
電網技術
전망기술
POWER SYSTEM TECHNOLOGY
2013年
4期
1005-1011
,共7页
刘文颖%王佳明%谢昶%王维洲
劉文穎%王佳明%謝昶%王維洲
류문영%왕가명%사창%왕유주
复杂电网%连锁故障%不完全信息%多阶段对策%越限系数
複雜電網%連鎖故障%不完全信息%多階段對策%越限繫數
복잡전망%련쇄고장%불완전신식%다계단대책%월한계수
complex power grid%cascading failure%incomplete information%multistage games%overloading coefficient
为防御由连锁反应故障引发的大停电事故提出一种基于不完全信息多阶段对策的复杂电网连锁故障防御模型.鉴于无法掌握连锁故障各个阶段的事故状态信息,提出负载严重程度和母线电压跌落严重程度表征“不完全信息”情况下元件故障对系统造成的影响.结合对策理论,模型对连锁反应故障不同阶段的电网进攻方当前策略进行辨识并求取其支付函数.根据进攻方支付函数的大小,防御方通过计算直流潮流灵敏度矩阵和负荷节点电压灵敏度矩阵采取相应的防御策略,同时对电网各元件进行快速越限系数计算,预测进攻方下一轮策略.模型为连锁故障初级阶段的调整措施和快速反应阶段的紧急控制措施提供了直观依据.算例仿真验证了该模型的准确性和有效性.
為防禦由連鎖反應故障引髮的大停電事故提齣一種基于不完全信息多階段對策的複雜電網連鎖故障防禦模型.鑒于無法掌握連鎖故障各箇階段的事故狀態信息,提齣負載嚴重程度和母線電壓跌落嚴重程度錶徵“不完全信息”情況下元件故障對繫統造成的影響.結閤對策理論,模型對連鎖反應故障不同階段的電網進攻方噹前策略進行辨識併求取其支付函數.根據進攻方支付函數的大小,防禦方通過計算直流潮流靈敏度矩陣和負荷節點電壓靈敏度矩陣採取相應的防禦策略,同時對電網各元件進行快速越限繫數計算,預測進攻方下一輪策略.模型為連鎖故障初級階段的調整措施和快速反應階段的緊急控製措施提供瞭直觀依據.算例倣真驗證瞭該模型的準確性和有效性.
위방어유련쇄반응고장인발적대정전사고제출일충기우불완전신식다계단대책적복잡전망련쇄고장방어모형.감우무법장악련쇄고장각개계단적사고상태신식,제출부재엄중정도화모선전압질락엄중정도표정“불완전신식”정황하원건고장대계통조성적영향.결합대책이론,모형대련쇄반응고장불동계단적전망진공방당전책략진행변식병구취기지부함수.근거진공방지부함수적대소,방어방통과계산직류조류령민도구진화부하절점전압령민도구진채취상응적방어책략,동시대전망각원건진행쾌속월한계수계산,예측진공방하일륜책략.모형위련쇄고장초급계단적조정조시화쾌속반응계단적긴급공제조시제공료직관의거.산례방진험증료해모형적준학성화유효성.
To defense the blackout caused by cascading failures, based on multistage games with incomplete information a model to defense cascading failures in complex power grid is proposed. Seeing that the failure-state information in different stages of cascading failures cannot be mastered, it is proposed to characterize the affects of component faults on power grid under incomplete information by the severity degree of overloading and the severity degree of voltage drop. Combining with game theory, the proposed model recognizes the offensive side’s current strategy during different courses of cascading failures and gets the payoff function. According to payment function values, the defensive side takes appropriate defense strategy by calculating the DC power flow sensitivity matrix and load node voltage sensitivity matrix, meanwhile, the overloading coefficients of power grid components are rapidly calculated to predict the offensive side’s strategy in the next round. The proposed model provides direct and accurate evidences for adjustment measures at the initial stage of cascading failures and emergency control measures at the rapid spreading stage. The feasibility and effectiveness of the proposed defense model are validated by case simulation.