考虑运行方式优化和拓扑校正控制的参考电网优化方法

针对现有参考电网模型未涉及电网现状以及未关联电网运行策略的不足,提出了考虑运行方式优化和拓扑校正控制的参考电网优化方法,为输电网灵活规划提供重要参考。基于前瞻时间尺度内各时段负荷预测值和规划网络候选支路方案,构建以最小化发电成本和输电成本之和为目标,以系统正常运行状态以及N-1事故状态下的运行安全要求为约束条件的参考电网优化模型。对优化模型中混合整数非线性约束式进行处理,将其转换为混合整数二次规划模型,并采用混合整数二次规划法对优化模型进行求解,得到最终的优化方案。最后,通过算例分析说明了所提方法的有效性。

Optimization method for reference network considering operation mode optimization and topology correction control

Considering the shortage of the existing reference network models rarely taking the performance of realistic power grid and its operation modes into consideration, an optimization method for reference network considering operation mode optimization and topology correction control is proposed to provide guidance for transmission flexible planning. Based on the forecasted load level in the schedule time scale and candidate branches in network planning strategy, a novel model for reference network is built to minimize the total generation cost and transmission cost, in which the security constraints such as transmission line constraints under normal and N-1 contingency conditions should be respected. The proposed model is a complex mixed-integer nonlinear problem mathematically, and can be converted to a mixed-integer quadratic programming problem, which is solved by the mature mixed-integer quadratic programming method to attain the optimization scheme. Finally, case studies are conducted to illustrate the effectiveness of the proposed method. This work is supported by National Natural Science Foundation of China (No. 51477091) and National Key Basic Research Program of China (973 Program) (No. 2013CB228205).