大系统分解协调法和非线性规划法应用于电力系统经济调度

APPLICATION OF DECOMPOSITION COORDINATION METHOD OF LARGE - SCALE SYSTEMS AND METHOD OF NONLINEAR PROGRAMMING TO ECONOMIC SCHEDULING OF POWER SYSTEM

讨论了含梯级水电站的大型水火电力系统有功功率最优分配的数学模型,考虑了水电厂上、下游水位的变化、梯级水电厂间的水流时间延迟等因素。通过两次运用对偶分解原理将整个系统分解成一个三级协凋系统而多得到三级计算结构。文中讨论了各级采用的非线性规划的多种最优化计算方法,并对实际电力系统进行了试算和分析。文章对大系统分解协调法、乘子法和一种新变尺度法在水火电力系统短期经济调度中的应用作了探讨。

In this paper,we discuss a mathematical mode) for optimization of active power dispatch of large-scale hydro-thermal power systems with cascaded hydropower stations. The following factors are taken into account: the variation of the head in the hydropower stations, water transport delay between cascaded stations etc. Using the decomposition-coordination method of large scale systems, we obtain a three-layer-hierarchical coordination system and a three-layer-hierarchical computational structure. We also discuss the computational methods which are used by each hierarchy. We have taken a test computation and analysing the result of an actual hydrothermal power system. The computational results show that it may obtain a satisfactory economic benefit. The paper provides some research work on the economic scheduling of hydrothermal power systems by the decomposition-coordination method of large-scale systems,multiplier method and a new variable metric method.