【摘要】 在电网分区的基础上,利用“Δ-变量”的特点,研究分析了其与辅助问题原理的结合应用,不仅成功将电网分离为多个计算上完全独立的区域,还通过中间变量解决了由分区计算所引起的多平衡节点问题。电网分区是电力系统的一个重要特征,各个分区进行独立并行优化,充分利用了网络资源,大大缩短了总的运算时间,对电网实时无功优化具有很大的推动作用。同时在分区优化中运用罚函数机制来处理离散变量,避免了简单归整法易出现不可行解的情况,提高了算法的收敛可靠性。文中还通过IEEE118节点算例对研究内容进行了测试,得到了比较满意的效果。更多还原

【Abstract】 This paper analyzes the characteristic of Δ-variables and auxiliary problem principle.The formulas that Δ-variables are used in auxiliary problem principle are discussed in detail.In this way,power system could be divided into several completely independent areas.And multi-balance bus problem which is resulted from subarea division could be solved through Δ-variables.Optimal power flow algorithm based on subarea division makes full use of the network resource,and well promotes real time optimal reactive power.In this paper,penalty function is adopted to deal with discrete control variables in order to avoid appearing infeasible solution.The study of IEEE 118-bus system proves that this method is feasible and practical.更多还原