具有变量范围约束的电力系统潮流算法及其应用

本文提出一个具有变量范围约束的电力系统潮流新算法,其变量的取值可以是不等式约束规定的范围。新算法可使潮流计算更快捷方便,符合实际要求;可以清楚揭示电压变化与无功补偿之间的关系,并作为优化系统无功配置的一种优化方法;基于新算法并运用随机生产模拟,开发了潮流自动计算程序,可满足年度逐小时潮流自动计算的要求;基于新算法提出一个全新的无功优化算法,通过扩展的具有变量范围约束的电力系统潮流方程,将目标函数值作为方程中的一个参数,逐次收缩目标函数值,将无功优化问题转化为一系列求解非线性方程组的一维优化搜索过程,并可拓展为最优化问题的一类新算法。通过算例验证了算法的有效性。

Algorithm of Electric Power Flow With Scope Restrictions on Varieties and Its Applications

A new model of electric power flow in which varieties are restricted with the scope inequations. The new model can not only make the power flow calculation more convenient, but also bring to light the relations between the variation of voltage and reactive power capacity clearly. So that the method can be used to determine the reactive power compensate capacity to be installed according to the variation scope of the voltage as requested. The automatic calculation method of electric power flow based the new algorithm is developed. It can bring about the automatic calculation of electric power flow hour by hour for annual operation modes. A new reactive power optimization algorithm is developed in the paper. Extending the power flow equations with variable scope restrictions, the objective function value is as a parameter of the the equations. Contracting the value step by step, the reactive power optimization is turned into the process of nonlinear equations solution which is the search process of one dimensional optimization. The new algorithm can be induced a kind of new optimization algorithm. The validity of the algorithm are demonstrated by case studies in the paper.