35KV变电站设计

摘 要

变电站是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济运行，是联系发电厂和用户的中间环节，起着变换和分配电能的作用。电气主接线是发电厂变电所的主要环节，电气主接线的拟定直接关系着全厂电气设备的选择、配电装置的布置、继电保护和自动装置的确定，是变电站电气部分投资大小的决定性因素。变电站是把一些设备组装起来，用来切断、接通、改变或者调整电压的。在系统中，变电站成了输电和配电的集节点。

本次设计首先根据任务书上所给系统与线路及所有负荷的参数，分析负荷发展趋势。从负荷增长方面阐明了建站的必要性，然后通过对拟建变电站的概括以及出线方向来考虑，并通过对负荷资料的分析，安全，经济及可靠性方面考虑，确定了35kV，10kV以及站用电的主接线，然后又通过负荷计算及供电范围确定了主变压器台数，容量及型号，同时也确定了站用变压器的容量及型号，并进行了短路电流计算等内容，从而完成了35kV电气一次部分的设计。

关键词： 主变压器，电气主接线，短路电流，电气设备

Abstract

A substation is the electrical power system important constituent, it affects the entire electrical power system directly the security and the economical movement, is relates the power plant and user’s middle link, is playing the transformation and the assignment electrical energy role.The electrical host wiring is the power plant transformer substation key link, the electrical host wiring draws up is relating the entire factory directly the electrical equipment choice, the power distribution equipment arrangement, the relay protection and the automatic device determination, is the transformer substation electricity part investment size determining factor.The transformer substation is assembles some equipment, uses for to shut off, the connection, the change or the regulation voltage.In the system, the transformer substation has become the electric transmission and the power distribution collection node.

This design first acts according to in the project description to give the system logical circuit and all load parameter, the analysis load trend of development.Had expounded from the load growth aspect the station construction necessity, then through to plans to construct the transformer substation the summary as well as the going beyond a line direction considered, and through to shoulders the material the analysis, safe, the economy and the reliable aspect considered, had determined 35kV,10kV as well as the station use electricity the main wiring, then calculated through the load and supplies power the scope to determine the main transformer Taiwan number, the capacity and the model, simultaneously also had determined stood with contents and so on transformer capacity and model, thus has completed 35kV electricity partial designs.

Keywords:

Main transformer，Single bus bar segment wiring，Short out in the-