台风灾害下提升电网韧性的实时优化调度策略

Real-time Optimal Dispatching Strategy for Improving Power Grid Resilience Under Typhoon Disaster

针对在台风灾害下输电线路停运可能引发的电网大停电事故,构建了提升电网韧性的实时优化调度策略。运用脆弱性曲线刻画风速与线路故障率关系,并考虑线路负载率对线路故障影响,获得台风灾害下的输电线路故障概率;通过蒙特卡罗抽样生成故障场景集,采用置信集法进行场景削减;在此基础上构建了综合考虑潮流均匀度、受灾区线路负载率和发电成本的多目标实时优化调度模型,将输电线路开断(Optimal Transmission Switching, OTS)引入到模型中以降低受台风灾害影响的线路数量。为提高优化调度模型求解的计算速度,采用Benders分解法进行求解。以IEEE 118节点系统为例进行仿真,验证了所提方法的有效性。

In view of the power grid blackout accident that may be caused by the outage of transmission lines under the typhoon disaster,a real-time optimal dispatching strategy to improve the resilience of the power grid is constructed.The relationship between wind speed and line fault rate is described by using the vulnerability curve,and the impact of line load rate on line fault is considered to obtain the transmission line fault probability under typhoon disaster;The fault scenario set is generated by Monte Carlo sampling,and the scenario reduction is performed by using the confidence set method;On this basis,a multi-objective real-time optimal dispatching model considering the power flow uniformity,the line load rate in the disaster area and the cost of power generation is built,and the optimal transmission switching(OTS)is introduced into the model to reduce the number of lines affected by typhoon disasters.In order to improve the calculation speed of the optimal scheduling model,Benders decomposition method is used to solve the problem.An IEEE 118-bus system is simulated to verify the effectiveness of the proposed method.