基于损耗最小化的南方西电东送通道功率优化分配实用方法  

A Practical Approach for Optimal Power Distribution Among the West-to-East Power Transmission Channels with Minimized Losses

作　　者：程改红 朱庆春 燕京 CHENG Gaihong;ZHU Qingchun;YAN Jing(Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group Co.,Ltd.,Wuhan 430071,China;China Southern Power Grid EHV Power Transmission Company,Guangzhou 510000,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071 [2]中国南方电网有限责任公司超高压输电公司,广东广州510000

出　　处：《中国电力》2020年第10期200-205,共6页Electric Power

摘　　要：为降低西电东送电网运行过程中的输电损耗,采用理论解析法和仿真计算相结合的方法对网损最小化的西电东送通道功率优化分配策略进行研究。基于等网损微增率原则对不同直流输电通道的功率优化分配关系,确定各直流输电通道的最优功率占比;在不同直流通道功率最优分配的基础上,通过电力系统分析计算软件对交流和直流通道送电功率的合理分配关系进行寻优计算。通过分步实施的寻优策略,将多个输电通道功率优化分配的多变量优化问题简化为单变量优化问题。基于进退法、黄金分割法等一维搜索方法,可通过较少的寻优次数确定最优的输电通道功率分配方案。实例表明,提出的输电通道功率优化策略具有较强的实用性和可操作性,可为电网运行方式安排和经济运行提供重要参考。In order to reduce the power losses in power transmission from West to East,an optimal power distribution strategy with minimized losses is studied for the West-to-East power transmission channels based on both theoretical analysis and simulation calculations.The optimal power percentage of each DC transmission channel is determined with the principle of equal loss incremental rate.Based on the optimal power distribution among the DC transmission channels,the power system simulation tool is adopted to search for the reasonable power distribution between AC and the whole DC transmission channels.By introducing the step by step search strategy,the multivariable optimization problem involving power distribution among multiple transmission channels is converted to single variable optimization problem.Based on the line search strategy including advance and retreat algorithm and golden section algorithm,the optimal power distribution among transmission channels is thus determined through a small number of iterations.The proposed approach has been applied to West-to-East power transmission channels of CSG system,and the results demonstrate that the proposed approach is practical and easy to use,which can provide reference for dispatching and economic operation of power system.

关 键 词：输电损耗 西电东送通道 网损最小化 功率优化分配 等网损微增率 一维搜索 

分 类 号：TM714[电气工程—电力系统及自动化]