摘要

变电站作为电力系统中的重要组成部分，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。本设计根据某地方的电力负荷资料，作出了该区地面35kV变电站的一次初步设计。本次设计中进行了电气主接线的设计、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、母线等）、各电压等级配电装置设计、直流系统设计以及防雷保护的配置。

关键词：35KV；变电站；一次设计

Abstract

    Substation as an important part of power system, a direct impact on the security and economic operation of the entire power system. Contact power plants and the middle part of the user plays the role of the transformation and distribution of electric energy. The design according to the electric load data of a place to make the area ground 35kV substation a preliminary design. The design of the design of the main electrical wiring, short-circuit current calculation, the main electrical equipment selection and calibration (including circuit breakers, disconnectors, current transformers, voltage transformers, bus, etc.), the voltage level of electrical installations DC system design and configuration of the lightning protection.

    Keywords: 35KV; substation; once design