基于电压制式的电网最优供电半径研究-电力系统保护与控制.PDF

第 38 卷 第 19 期 电力系统保护与控制 Vol.38 No.19 2010 年 10 月 1 日 Power System Protection and Control Oct. 1, 2010 基于电压制式的电网最优供电半径研究 柳占杰，许跃进 （中国农业大学信息与电气工程学院，北京 100083） 摘要：供电半径是影响电网结构是否合理的重要参数。精确科学地构建电网结构模型是求解过程中首先要面临的问题。通过 引入决策变量λ，在供电半径未知的情况下构建了电网结构规划模型，进而用供电半径及λ描述了电网的建设费用和损耗费 用，最后以单位面积供电区域年费用目标函数，以电压允许偏差为约束条件求解最优供电半径。该方法解决了以往粗略地以 供电半径代替线路长度及变电站个数表示不准确等问题，使模型更加合理，更加符合实际情况。 关键词：供电半径；电网模型；合理结构；电能密度；年费用 Research on the optimal grid radius based on standard voltage LIU Zhan-jie ，XU Yue-jin （School of Information Electrical Engineering, China Agricultural University ，Beijing 100083 ，China ） Abstract ：The power supply radius is the important parameters affecting if the power structure is reasonable ．Exactly and scientifically building grid structure is the first problem faced in the process ．According to the introduction of decision variables λ in this paper ，programming model of grid structure is built when the power supply radius is unknown ，then the power supply radius and λ are used to describe the construction costs and loss costs ．At last ，it puts forward the optimal power supply radius by taking a smallest cost of power supply in the unit area as the objective function and voltage offset as constraints ．It solves the problems of using radius instead of the length of lines roughly and describing the numbers of substations inaccurately ．This method makes the model more reasonable and more in line with the actual situation ． Key words ：power radius ；grid model ；reasonable structure ；power density ；annual cost 中图分类号： TM715 文献标识码：A 文章编号： 1674-3415(2010)19-0087-05 理供电半径。 0 引言 目前对电网合理供电半径的求解一般采用以