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毕 业 设 计(论文)

题 目 110/35/10kV降压变电站一

次系统设计

系 别 专业班级 学生姓名 指导教师

电力工程系

二○一○年六月

本科毕业设计（论文）

110kV降压变电站一次系统设计

摘要

城市供电系统的核心部分是变电站。因此，设计和建造一个安全、经济的变电站，是极为重要的。110kV变电所设计以生产实际为依据，以变电所的最佳运行状态为基础，系统的阐明了110kV变电所设计的基本方法和步骤，经过多方面的校验，是满足实际生产需要的一套最优设计方案。本变电站设计除了注重变电站设计的基本计算外，对于主接线的选择与论证等都作了充分的说明，其主要内容包括：变电站主接线方案的选择，进出线的选择；变电站主变压器台数、容量和型式的确定；短路点的确定与短路电流的计算，电气设备的选择（断路器，隔离开关，电压互感器，电流互感器，避雷器）；配电装置设计和总平面布置；防雷保护与接地系统的设计。另外，绘制了七张图纸，包括：电气主接线图，电气总平面布置图，防雷接地图，110kV接线断面图，110kV内桥断面图，35kV接线断面图，10kV室内配电图等。图纸规格与布图规范都按照了电力系统相关的图纸要求来进行绘制。

关键词：变电站；电气主接线；电气设备；设计

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本科毕业设计（论文）

A DESIGN OF ELETRIC SYSTEM FOR 110kV TERMINAL TRANSFORMER

SUBSTATION

Abstract

The core of city for supplying power is transformer. It is very important to design and build one safe and economical transformer substation [1]. The actual design for the production, based on the best operation to substations based system designed to clarify the 110kV substations basic methods and steps, after multiple access, is a set of solutions to meet the needs of actual production design programs. Besides paying attention to basic calculation of design for transformer substation, the design makes satisfying narration toward choice and argumentation of main connection. The main content of this design include the choice of main connection for transformer substation; the choice of pass in and out line; the certainty of number, capacitance and model for main transformer; the certainty of short circuit points and calculation of short circuit; the choice electric equipment(breaker, insulate switch, voltage mutual-inductance implement, current mutual-inductance implement, arrester); the design for distribution and disposal for chief plane; the design for lightning proof protection and earth system. In addition, drawing seven blueprints include the main wiring diagram; the disposal drawing of electric plane; the drawing of lightning proof protection and earth system; the drawing of 110kV connection; the drawing of 35kV connection; the drawing of 10kV indoor distribution and so on. Both the specification of drawing and the criterion of disposal is based on requirement of drawing to electric power system.

Keywords: Transformer substation; Main connection; Electric equipment; Design

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