【正文】 畢業(yè)設計任務書 畢業(yè)設計題目： 南 郊二次變電所電氣工程（部分）設 計 2020 年 10 月 25 日 沈 陽 工 程 學 院 2 中 文 摘 要 隨著社會現(xiàn)代化建設的飛速發(fā)展，近年來城市電網(wǎng)建設力度亦隨之加大，各地區(qū)不同電壓等級變電所的建設已成為電力行業(yè)中非常重要的一項建設，并發(fā)揮著重要的作用。 本畢業(yè)設計論文是東郊二次變電所電氣工程（部分）初步設計。 全論文除了摘要、畢業(yè)設計書之外，還詳細說明了各種設備選擇的最基本的要求和原則依據(jù)。 變壓器的選擇包括：主變壓器的臺數(shù)、容量、型號等主要技術(shù)數(shù)據(jù)的確定；電氣主接線主 要介紹了電氣主接線的重要性、設計依據(jù)、基本要求、各種接線形式的優(yōu)缺點以及主接線的比較選擇，并制定了適合要求的主接線； 短路電流計算是最重要的環(huán)節(jié)，本論文詳細的介紹了短路電流計算的目的、假定條件、一般規(guī)定、元件參數(shù)的計算、網(wǎng)絡變換、以及各短路點的計算等知識；高壓電氣設備的選擇包括母線、高壓斷路器、隔離開關、電流互感器、電壓互感器的選擇原則和要求，并對這些設備進行校驗和產(chǎn)品相關介紹 。根據(jù)本論文所介紹的 60kV 高壓配電裝置的設計原則、要求，此次設計本所 60kV 配電裝置采用三相中型布置。繼電保護和自動裝置的規(guī)劃， 包括總則、自動裝置、一般規(guī)定主變壓器、母線等設備的保護，而變電所的防雷保護則主要針對避雷針和避雷器的設計。此外，在論文適當?shù)奈恢眠€附加了圖紙（主接線、平面圖、斷面圖、防雷保護等）及表格以方便閱讀、理解和應用。 關鍵字 ： 短路，計算校驗，設備選擇，設計，變電所 沈 陽 工 程 學 院 3 Abstract With the rapid development of social modernization, urban power grid construction in recent years, efforts have also bee larger, and different regions of the construction of substation voltage power industry has bee a very important building, and play an important role. Thesis is the eastern outskirts of the secondary substation electrical engineering (part) preliminary design. All papers in addition to a summary of graduate design books, but also details the various equipment options based on the most basic requirements and principles. Transformer options include: the number of main transformer station, capacity, type and other major technical data of the determination。 introduces the main electric connection the importance of main electrical wiring, design basis, the basic requirements, advantages and disadvantages of different connection forms the main wiring Comparison of options and requirements established for the main terminal。 shortcircuit current calculation is the most important part, this paper describes in detail the purpose of shortcircuit current calculation, assuming conditions, a general rule, the calculation of device parameters, work transformation, as well as the shortcircuit point calculations and other knowledge。 high voltage electrical equipment options include bus, high voltage circuit breaker, disconnecting switch, current transformer, voltage transformer selection principles and requirements, and calibration of these devices and products introduced. According to this paper described the design of 60kV high voltage electrical installations principles, requirements, the design of the 60kV distribution equipment of the threephase mediumsized layout. Relay protection and automatic device programming, including general principles, automatic devices, the general provisions of the main transformer, bus and other equipment protection, and substation lightning protection and lightning arrester is mainly for the design. In addition, the appropriate location in the paper is also attached drawing (main connection, floor plans, section plans, lightning protection, etc.) and forms to facilitate reading, understanding and application. Key word： Short circuit calculation ， Examination ，The choice of the equipments， Design Substation 沈 陽 工 程 學 院 4 目錄 中 文 摘 要 ......................................................................................................................................2 Abstract............................................................................................................................................3 目錄 4 引言 7 第一篇 說明書 ...............................................................................................................................8 第一章 原始資料分析 .....................................................................................................................8 11 設計題目 ....................................................................................................................................8 12 設計的原始資料 .........................................................................................................................8 第二章 主變壓器臺數(shù)、容量的選擇 ...................................................................................................9 主變壓器臺數(shù)、容量的擇 .............................................................................................................9 主變壓 器的臺數(shù)的確定 .............................................................................................................9 主變壓器容量的選擇 ................................................................................................................9 電力變壓器的型號 ..................................................................................................................... 10 第三章 電氣主接線選擇 ................................................................................................................... 10 31 主接線設計原則 ....................................................................................................................... 10 311 主接線設計的依據(jù) .............................................................................................................. 10 312 主接線設計的基本要求 ....................................................................................................... 11 32 主接線的選擇 ........................................................................................................................... 12 321 主接線的預定方案 .............................................................................................................. 12 322 60kV 側(cè)接線選擇與論證 ...................................................................................................... 17 32310kV 側(cè)接線型式選擇與論證 ................................................................................................ 17 第四章 短路電流計算 ...................................................................................................................... 19 短路電流的概述及原因 ....................