摘要:随着工业的发展以及用电需求量的不断增加电力系统主电网的规划显得日益重要，它关系着用户能否得到可靠优质的电能也关系着生产力的发展。

　　 本设计根据原始资料提供的电源信息、负荷信息以及地理信息做出相应的功率平衡，确定电压等级，确定发电厂变电站主接线、变压器台数及容量，按经济截面选择备选方案导线，从机械强度、载流量、电压损失等方面确定导线型号，然后根据电能损耗、线路投资以及年计算费用进行技术经济比较，确定最终方案。

最后根据最终方案的潮流计算结果选定调压方案。本设计给出所选方案的主网接线图及潮流分布图。

关键词 ：主电网  潮流计算  调压方案

ABSTRACT:Along with the development of the industry and the increasing electricity demand of electric power system of the main grid planning is increasingly important, it was about whether the user can get reliable high-quality electricity also relationship with the development of productive forces.

　　　This design according to the information of original data provided by the power supply, load and power balance of the geographic information accordingly, determine the voltage grade, determine power plant substation main wiring, sets and the capacity of transformer, according to the economic section choice alternatives conductor, from the aspects such as mechanical strength, carrying capacity and voltage loss conductor type is determined, and then according to the electric energy loss and line investment costs of computing and technical and economic comparison, to determine the final plan according to the final solution of power flow calculation results regulating scheme is selected. This design gives main wiring diagram and the trend of the distribution of the selected scheme.

Keywords: Main grid   Power flow calculation   Surge tank scheme