摘要

本次设计主要介绍了110kV变电所电气一次部分的初步设计过程、原则、方法等。设计的内容符合国家有关经济技术政策，满足对电气一次回路的要求，包括可靠性、灵敏性和经济性三方面。

该设计共分为任务书、计算书、说明书三部分，同时还附有若干张图纸加以说明。该变电站有2台主变压器，共分为三个电压等级：110kV、35kV、10kV，各个电压等级110kV、35kV、10kV，均采用单母线分段的主接线方式供电。本次设计中进行了短路电流计算，主要设备选择及校验（包括断路器及隔离开关的选择、互感器的选择、导线的选择、所用变的选择），并同时对防雷保护和接地设计的相关方面的知识进行了初步介绍。关于主接线部分的内容是基础部分，主要介绍了主接线的形式及优缺点。短路电流是非常重要的部分，它主要介绍了对称短路计算的目的、原则、方法和具体的数据信息等，为设计中需要的高压电气设备的选择、整定、校验等方面做准备，电气设备的选择及校验主要是利用对称短路的计算结果进行高压电气设备（断路器、隔离开关）的校验。

计算书部分通过数据的形式对设计的要求和需要的参考价值等以直观的描述。

关键词：变电所，短路电流计算，设备选择，整定与校验

Abstract

This design mainly introduced a 110kV transformer substation electricity partial preliminary design process, the principle, the method and so on. The design content conforms to the national related economical technology policy, satisfies to an electrical return route's request, including reliable, sensitive and efficient three aspects.

This design altogether divides into the project description, the account book, the instruction booklet three parts, meanwhile attaches certain blueprints to perform the explanation.  This transformer substation has 2 main transformers, altogether divides into three voltage classes: 110kV, 35kV, 10kV, each voltage class 110kV, 35kV, 10kV, picks the main wiring way power supply which partitions with the single bus bar. In this design has carried on the short-circuit current computation, (choice which the major installation choice and the verification including circuit breaker and isolator's choice, mutual inductor's choice, wire choice, use change), And simultaneously has carried on the preliminary introduction to the anti-radar protection and the earth design's related aspect's knowledge. About the main wiring part's content is the foundation part, mainly introduced the main wiring form and the good and bad points. The short-circuit current is the very important part, it mainly introduced the symmetrical short circuit computation's goal, the principle, the method and the concrete data message and so on, high pressure and so on electrical equipment's choice which, installation, verification needs for the design in the aspect prepare, electrical equipment's choice and the verification are mainly the use symmetrical short circuit's computed result carries on the high pressure electrical equipment (circuit breaker, isolator) the verifications.

The account book part through the data form the reference value which and needs to the design request and so on by the direct-viewing description.

Key words: Transformer substation Short-circuit current calculating device choice installation and verification