毕业论文35-10KV变电所(一台主变)一次部分设计.doc

35/10KV变电所(一台主变)一次部分设计 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(所)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。 本设计对变电站的主要一次设备进行了选择，并根据短路电流计算，通过电器设备的短路动稳定、热稳定性对主要设备进行了校验。主要包括了电气主接线图形式的论证、短路电流计算、主要电气设备选择及校验(包括断路器、隔离开关、电流互感器、电压互感器)，同时完成了防雷保护的配置、继电保护的规划等相关方面的工作。 关键字：变电站 主变压器 电气主接线 短路电流计算 防雷保护 35kV transformer substation electricity control preliminary design (1 main transformer of sets) ABSTRACT The know-why the learns, real circumstances of this engineering of combination are used, the analysis conscientiously careful by way of to the primary sources, as well as short circuit calculation to decide on the scheme. The selection of the electric owner grasping the transformer substation wiring scheme, the mould selecting of major electric installation, the selection of main transformer platform number, capacity and model, as well as the various protections are surely calmly. The design of a major substations equipment options, and based on the calculation of short-circuit current through electrical equipment short circuit moving stability, thermal stability to the status of major equipment. Proceeds in this design the electricity lord connect the line sketch the types argument, short-circuit electric current calculation, main electricity equipments (include to break the road, insulate the switch, electric current with each other , electric voltage to with each other), and complete to defend what thunder protect to install at the same time, after the programming etc. that the electricity protect the parties condemned’s work. Keywords: transformer substations; transformer of sets; short-circuit electric current calculation 目 录 摘 要 I ABSTRACT II 第一章 绪论 1 1.1 电力系统概述 1 1.2 变电所简介 1 1.2.1 变电所基本原理 1 1.2.2 变电所的分类 2 1.2.3 变配电所所址的选择 2 1.3 变电站的选址条件及负荷统计 3 1.3.1 所址水文条件 3 1.3.2 所址气象条件 3 1.3.3 所址地质条件 4 1.4 本文所要做的工作 4 第二章 电气主接线设计 5 2.1 电气主接线设计原则和程序 5 2.1.1 电气主接线的设计原则 5 2.1.2 电气主接线的设计程序 6 2.2 主接线的基本接线形式及其优缺点 7 2.2.1 单