35kV变电所一次系统设计.doc

浙江科技学院本科毕业设计（论文） PAGE 38 35kV变电所一次系统设计 林 静 (自动化与电气工程学院 指导教师：柳 春 生) 摘要：在工业生产自动化中，工厂高压供电和配电是一个工厂最基本的能源保证。即对总降压变配电所的设计要求在不断地提高，尽可能地使得电网和电力系统安全、经济、稳定的运行，才能保证工业生产和人身安全。本设计说明书是为35kV变电所设计的。通过对设计原始资料的分析，全厂负荷的计算，选择相应的主变压器台数和容量，从而确定其具体的供电系统。再对其初选的系统进行相应的短路计算和高压设备的选择及校验，选择和校验高压线路，最后简单的进行继电保护设置的说明。结合课本的基础知识，根据我国变配电所的运行情况以及各种变压器、开关柜、线路等电器设备的标准，进行具体的定量地选择电器设备，最终可以得出具体的关于工厂总降压变配电所供电的系统图。 关键词： 变电所；负荷计算；变压器；短路电流；选择校验；继电保护 Abstract:In the automation of industrial production, high-voltage power supply and power distribution are the most fundamental energy guarantee for a factory. That is to say, in order to make the systems of electric grid and electric power work safely, economically and stably as much as possible, the design requirements of the substation improve continuously, which is the only way to ensure industrial production and personal safety. This design instruction is designed for 35kV substations. Through analyzing the original design materials, calculating the load throughout the factory and choosing the corresponding quantity and capacity of the main transformer, the concrete power supply system can be determined accordingly. Then for the primary system, not only the relevant short-circuit should be calculated but also the high-voltage equipments should be selected and examined. Meanwhile, the high-voltage circuit should also be selected and examined. Finally the relay protection of power system should be given a short explanation. According to the operation of the substations in our country and the standard of various electrical apparatus such as transformer, switch, circuit and so on, the electrical apparatus can be selected concretely and quantatively with the combination of the basic knowledge of textbooks. At last the concrete system drawing of electricity supplied by substations in factories can be reached. Key words: transformer station；Load forecasting；transformer；electric calculation；choose and checkout；relaying protection 1 前 言 一、毕业设计背景 随着工业自动化