配电网技术经济运行区域的研究及应用  

Study on Technical Economic Operation Area of the Distribution Network

作　　者：卢志刚[1] 李爽[1] 韩彦玲[1] 朱连波 

机构地区：[1]燕山大学电气工程学院,秦皇岛066004 [2]秦皇岛电力公司,秦皇岛066004

出　　处：《高电压技术》2007年第6期156-159,共4页High Voltage Engineering

摘　　要：针对变压器和导线的选择配置,分析其技术经济运行区域,对配电网的经济运行有重要意义,故考虑变压器投资、损耗费用及维护费用,根据使用年限内计算费用最小原则推导出了变压器合理的负载率和经济运行点,进而得出变压器的技术经济运行区域;结合导线经济电流密度,应用基尔霍夫定律,得到每一段线路的技术经济运行区域,在上述基础上,得到整个线路的最佳经济运行区域及最佳线损率范围。据此可评价配电网变压器和线路配置情况,为降损改造提供决策依据。The paper deals with the economic operation of the power transformer, which is of a great significance for analyzing the technical economic area of the network considering the selection of the transformer and the line. Taking into account of the cost of the transformer, the charge of the loss and the maintenance, the transformers technical economic loading rate is deduced, which is higher than the traditional rate obtained from that the transformer＇s copper loss equals to the iron loss. The mathematic representation of the loading rate is given, but the load fluctuates in a certain rang, finding out the economic area of the transformer＇s loading rate has more useful meaning to verity the transformer＇s operation, then the technical economic area is presented. The technical economic area of every line is obtained according to the economic current density of the line and the Kirchhoff current law. According to the former, the optimal economic area and line loss rate area is calculated, which can be used to estimate whether the line and the transformer are matching each other. It is useful for the loss reduction and the network evaluation. Finally, a line with 10 wires and 6 transformers is given, which is evaluated using the forming theory.

关 键 词：配电网 经济运行 负载率 经济电流密度 线损率 

分 类 号：TM732[电气工程—电力系统及自动化]