董琪

（山东农业大学 电气工程及其自动化  泰安 271018）

摘要：本文是对110kV 变电站电力系统进行总体分析，然后进行计算和初步设计，确定了变电站电气一次系统主接线的形式。该变电站设有两台主变压器，站内主接线分为 110kV、35kV 和 10kV 三个电压等级。本次设计进行了电气主接线的设计和选择、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、互感器、避雷器等）、各电压等级配电装置设计、防雷保护接地系统设计和变电站总体布置。本设计以《电力工程电气设计手册》、《35～110kV高压配电装置设计规范》等规范规程为依据，设计的内容符合国家有关经济技术政策，所选设备全部为国家推荐的新型产品，技术先进、运行可靠、经济合理。

关键词：一次系统 变压器 短路电流 设计

  110 kv step-down substation system design

Qi Dong

(Electric Engineering and Automation College of Shandong Agricultural University, Tai’an, Shandong 271018)

Abstract  This article is to overall of 110 kv substation of power system analysis, and then the calculation and preliminary design, determines the electric substation main wiring in the form of a system. The substation equipped with two sets of the main transformer, station NaZhu wiring is divided into 110 kv, 35 kv and 10 kv voltage grade three. The design of the main electrical wiring design and selection, short-circuit current calculation, the main electrical equipment selection and calibration (including circuit breaker, isolating switch, current transformer, lightning arrester, etc.), the voltage level distribution equipment design, lightning protection design and general arrangement of substation grounding system. This design is to "electrical engineering electrical design manual", "35 ~ 110 kv high-voltage power distribution equipment design code specifications such as discipline as the basis, the content of the design in conformity with the relevant economic and technological policies of the state, the selected equipment for all countries recommend new products, advanced technology, reliable operation, economic and reasonable

Keywords: primary system; transformer; short-circuit current; design