【正文】 pleting lord changing choice, electricity lord connecting linear draw up, short circuit puting, electricity equipments choosing, going together with electricity equiping, after give or get an electric shock the protection with the programming of the automatic device with defend protective programming in thunder etc. main period, all kinds problems that meet all passes to pare, check to calculate again and again, and ask the can solution in to design the thesis from design the manual, design calculation book, a set of diagrams paper( the electricity lord connects the line diagram, total flat surface arranges the diagram and go together with electricity equip cross section diagram, defend thunder protection diagram) contents is more detailed, to from now on extend to consults certainly value.For this year, electric power is in international munity energy with economy develop of the function increases increasingly, it have bee modern the society is practical the most widely and need the quickest the reasonable design that give or get an electric shock are a with developments very constituting the part importantly.This design is at guiding teacher descend, passing oneself of design what argument plete with meticulous design process inside, pletely dependable, economic, vivid...etc. many factors that meticulous consideration engineering design, end plete this design project.Pass to plete this graduate design the thesis, further appreciating the our country the policy idea of electric power industry developments with the economic standpoint, educates to proceed to the engineering technique, economy more pletely to synthesize the analytical skill.Because time strain with ability limited, this thesis inside difficult do not need to will appear the lapse with mistake, hope the teacher give to point out with make correction.Key word: Thermal power plant Electricity design short circuit calculation The equipments choice electricity equips 目 錄中文摘要 ......................................................................................................................................................IIABSTRACT................................................................................................................................................III目 錄 ............................................................................................................................................................V引言 ...............................................................................................................................................................1第一部分 說明書 .......................................................................................................................................2第一章 發(fā)電廠原始資料分析 .....................................................................................................................2第二章 主變壓器的選擇 .............................................................................................................................2 發(fā)電廠主變壓器的容量和臺數(shù)的確定： ........................................................................................2 有發(fā)電機(jī)電壓母線接線的主變壓器 .......................................................................................單元接線的主變壓器 .............................................................................................................3 主變壓器形式的選擇 .........................................................................................................................3 數(shù)的選擇 ....................................................................................................................................3 繞組數(shù)量和方式的選擇 ............................................................................................................3 本廠主變壓器的選擇 ........................................................................................................................3第三章發(fā)電廠電氣主接線選擇 ...................................................................................................................5 概 述 ................................................................................................................................................5 主接線的設(shè)計(jì)原則 ...........................................................................................................................5 主接線的設(shè)計(jì)依據(jù) ....................................................................................................................5 主接線設(shè)計(jì)的基本要求 ............................................................................................................6 本廠電氣主接線的選擇 ...................................................................................................................7 主接線方案的預(yù)定 ...................................................................................................................7第四章 短路電流的計(jì)算 .........................................................................................................................9 計(jì)算短路電流的目的： ....................................................................................................................9 電力系統(tǒng)短路電流計(jì)算 ....................................................................................................................9 基本假定 ...................................................................................................................................9 一般規(guī)定 .................................................................................................................................10 限流措施 .................................................................................................................................10 短路計(jì)算點(diǎn)的選擇 ..........................................................................................................................10 短路計(jì)算方法 ........................................................................................