含多分区电力系统能量备用实时优化调度的动态积极集求解算法

摘要

网络阻塞和故障停运导致备用存在供应问题,为了保证含多分区电力系统备用的有效性和网络的安全性,在实时优化调度中提出分区备用要求和新的求解算法,分析了含多分区的孤立和受端电力系统备用容量需求,建立了一种以电能和备用购买费用最小为目标函数的能量备用实时优化调度模型,同时计及了系统备用要求、分区备用要求、N-1安全准则等约束条件.该模型是一个超大规模的优化问题,因此文中将动态积极集法引入电力系统优化调度问题,对其进行迭代求解.最后,对IEEE 118节点标准测试系统和我国某典型受端电网进行算例分析,结果表明,采用提出的实时优化调度模型和动态积极集求解算法在满足电力系统实时调度计算时间要求的同时,求解得到能量备用的实时优化调度方案以及N-1故障后备用调用方案,验证了模型的合理性和算法的可行性.该算法可以有效解决备用的供应问题,提高电网运行的安全性,为含多分区电力系统的实时优化调度提供有意义的探索.%Network congestion and grid faults lead to the reserve deliverability problem.To ensure the reserve effectiveness and network security for multi-zonal power system,zonal reserve requirements and new algorithm are proposed in real-time optimal dispatching.The reserve capacity demand for both island and receiving-end in multi-zonal power systems is analyzed,and a real-time energy-reserve optimal dispatch model is developed to minimize the cost of energy and reserve,including systematic reserve requirements,zonal reserve requirements and N-1 security constraints.The model is a supper-large scale programming,so the method of dynamic active set is introduced to power system optimal dispatching problem to solve the proposed model iteratively.Moreover,numerical tests are performed based on the IEEE 118-bus test system and a real-life receiving-end power system in China.The results show that the computing period can meet the real-time dispatch interval need,and the real-time energy-reserve scheduling as well as the responsive reserve dispatch after N-1 outage are available,which verifies the rationality and feasibility of the proposed model.