基于效益分析的水火电力系统短期优化调度  

An Efficiency Analysis Based Short-Term Optimal Scheduling for Hydrothermal Power System

作　　者：吴杰康[1] 陆文玲[1] 

机构地区：[1]广西大学电气工程学院,广西壮族自治区南宁市530004

出　　处：《电网技术》2009年第18期25-31,共7页Power System Technology

基　　金：国家863高技术基金项目(2007AA04Z100);国家自然科学基金项目(50767001);广西自然科学基金项目(桂科自0640028);广西高校百名中青年学科带头人资助计划项目(RC20060808002);广西壮族自治区教育厅科技计划项目(200808MS150);广西壮族自治区研究生教育创新计划资助项目(20080808M41)~~

摘　　要：不可再生能源的消耗和可再生能源的高效利用,是电力系统短期优化调度需首要考虑的问题。文章提出一种新的水火电力系统短期优化调度的调度准则,即生产单位电能所需消耗水量的总和最小,并据此给出了基于效益分析的短期优化调度数学模型及其评价方法。首先建立了基于水库能的水电站发电模型,构建了火电机组的煤耗函数;再把火电系统煤的消耗量通过一定的换算标准转换成水量,根据水电系统中单位电量需消耗水量的计算方法,计算出各个电厂生产单位电能所需要消耗的水量,以此为准则对所有电厂进行短期发电的优化调度。以包括红水河8个梯级水电站和12个火电厂的广西电网为实例进行了仿真计算,计算结果证明所提出的调度准则具有可行性和适用性。The high efficient utililzation of renewable energy resource and the consumption of non-renewable energy resource are the problem to be first and foremost considered during short-term optimal scheduling of power system. In this paper, a new schedulilng criterion for short-term optimal scheduling of hydrothermal power system, i.e, the summation of water consumption for the production of specific electric energy is minimum, is proposed. On this basis, an efficiency analysis based mathematical model for short-term optimal scheduling and its evaluation method are given. Firstly, a power generation model of powerstation based on the reservoir energy is built and the coal consumption function of thermal units are constructed; then by use a certain conversion standard the coal consumption of thermal units is converted into water quantity and according to the method that calculates the water consumption for the production of specific electricity quantity the water consumption for the production of specific electricity quantity in each power plant is calculated, and taking it as the criterion the short-term optimal scheduling of all thermal plants and hydropowerstations is implemented. Simulation results of Guangxi power grid consisting of eight cascade hydroelectric stations in Hongshuihe river basin and twelve thermal plants show that the proposed dispatching criterion is feasible and available.

关 键 词：水火电力系统 短期调度 广西电网 效益分析 

分 类 号：TM734[电气工程—电力系统及自动化]