【正文】 主接線基本要求 ................................................................................... 10 第三節(jié) 方案的初步擬定 ................................................................................................11 第三章 短路計算 ...................................................................................................................... 22 第一節(jié) 短路計算的基本知識 ...................................................................................... 22 第二節(jié) 計算步驟 ........................................................................................................ 24 第三節(jié) 短路計算 ......................................................................................................... 25 第四節(jié) 變電所短路計算結果比較 ............................................................................. 39 第四章 所用 電源和 操作電源設計 ............................................................................................. 40 第一節(jié) 變電所用電設計原則 ...................................................................................... 40 第二節(jié) 所用電的設計 ................................................................................................. 43 第三節(jié) 操作電源的設計 ............................................................................................. 46 第五章 電氣設備選擇 ............................................................................................................... 51 第一節(jié) 電氣設備的選擇條件 ...................................................................................... 51 第二節(jié) 斷路器的選擇 ................................................................................................. 53 第三節(jié) 隔離開關選擇 ................................................................................................. 59 第六章 全所互感器配置和配電裝置的選擇 ............................................................................... 64 第一節(jié) 互感器配置 .................................................................................................... 64 第二節(jié) 主要電氣設備表 ............................................................................................. 66 第三節(jié) 配電裝置概述 ................................................................................................. 67 第四節(jié) 配電裝置的安全凈距 ...................................................................................... 69 第七章 繼電保護與自動裝置配置 ............................................................................................. 72 第一節(jié) 繼電保護配置 ................................................................................................. 73 第二節(jié) 自動裝置配置 ................................................................................................. 76 第八章 防雷與接地的設計 .................................................................................................... 83 第一節(jié) 防雷設計 ........................................................................................................ 83 第二節(jié) 接地裝置 ........................................................................................................ 92 專題：繼電保護新技術研究 ........................................................................................................ 93 致 謝 ................................................................................................................................ 98 參考文獻 ............................................................................................................................. 99 第 1 頁 共 100 頁 110kV 降壓變電站電氣部分畢業(yè)設計 第一章 設計任務介紹 第一節(jié) 原始資料 一、電氣一次部分的設計情況 該變電所為 110/，所內(nèi)設計 MVA 及40MVA 主變各一臺， 2 回 110kV 架空進線， 4 回 35kV 出線及 8 回 10kV 出線。通過對原始資料的分析、主接線的選擇及比較、短路電流的計算、主要電器設備的選擇及校驗、線路圖的繪制以及避雷器針高度的選擇等步驟、最終確定了 110kV 變電站所需的主要電器設備、主接線圖以及變電站防雷保護方案等來設計本次課題，達到了鞏固所學課程的理論知識，掌握變電站電氣部分和防雷保護設計的基本方法，體驗和鞏固我們所學的專業(yè) 基礎和專業(yè)知識的水平和能力，培養(yǎng)我們運用所學知識去分析和解決與本專業(yè)相關的實際問題，培養(yǎng)我們獨立分析和解決問題的能力的目的。 Abstract： Power system planning, design to construction, to operation and management is a huge content and skills covered in this course is the theoretical basis of this huge system engineering in order to ensure the 第 3 頁 共 100 頁 110kV 降壓變電站電氣部分畢業(yè)設計 safe operation of the power system, reliability of supply, we conducted the course design includes the general principles of the power system, the contents of the program, must short circuit calculation, reactive power pensation and protection. Substation is an important ponent of the power system, which directly affects the safety and economic operation of the entire power system, contact the power plants and the middle section of the user plays a role in the transformation and distribution of electric energy, power equipment and power distribution work according to a electricity from the power system, through its transformation, distribution, transmission and protection functions, and then to electrical energy safe, reliable, economic transportation to the conversion of electrical equipment substation must change the traditional design and control mode, to adapt to the modern power system, the development of modern power industrial production and social main electrical wiring is the main part of power plant substation electrical equipment, the formulation of the main electrical connection is directly related to the whole plant (The) to select the layout of power distribution equipment, relay protection and automatic devices to determine part of the investment of the electrical substationThe size of the decisive factors. This design is the construction of a 110KV stepdown substation, First of all, according to the main wiring economical and reliable, run flexible asked to select the voltage level of the wiring in the technical aspects and economic aspects, select the flexible optimal by a shortcircuit current calculation, according to shortcircuit point to calculate the shortcircuit steadystate current and shortcircuit impulse current when short circuit occurs, the voltage level of the bus, the shortcircuit steadystate current and