摘要阳泉桃东发电厂为一煤矿的发电厂，对整个煤矿来说是最重要的。发出的电为整个煤矿供电。该煤矿也是阳泉市主要的煤矿，是阳泉经济发展的重要动力。阳泉境内煤炭总储量100.77亿吨，以高变质年轻无烟煤及贫煤为主。另外，本市尚有大量风化煤、瓦斯和煤成气资源可供开采利用。发电厂是电力系统的重要组成部分，它直接影响整个电力系统的安全与经济。发电厂的作用是将其他形式的能量转化成电能。按能量转化形式大体分为火力发电厂，水力发电厂，核能发电厂和风力发电场。电气主接线是发电厂电气设计的首要部分，也是构成电力系统的重要环节。主接线的确定对电力系统整体及发电厂、变电所本身的运行的可靠性、灵活性和经济性密切相关。本次设计遵守了发电厂设计规范，通过对发电厂电气主接线、厂用电接线、有关短路电流的计算、电气设备选择及校验、继电保护、以及防雷保护的设计，简要完成了4×200MW火力发电厂电气一次部分的设计。将四台发电机全部升压接入220kV电网，简化了电网结构及电气主接线，省去了升高电压级之间的联络变压器，降低了变压器损耗。关键词：发电厂，电气主接线，继电保护，防雷保护AbstractYangquanpowerplantasacoalpowerplant,eastisthemostimportantforthewholecoalmine.Theelectricityforthewholecoalminepowersupply.ThemineisalsoamajorcoalmineinYangquancity,isanimportantmotivationofYangquaneconomicdevelopment.Yangquancoalwithintheterritoryofthetotalreservesof10.077billiontons,mainlyyounghighmetamorphismanthracitecoalandleancoal.Inaddition,thiscityhasalotofweatheredcoal,gasandcoal-derivedgasresourcesavailableforexploitation.Powerplantsisanimportantpartofpowersystem,itdirectlyaffectsthewholepowersystemsecurityandeconomic.Istheroleofplantsinotherformsofenergyintoelectricity.Accordingtotheformsofenergyconversioncanbedividedintothermalpowerplant,hydroelectricpowerstation,nuclearpowerplantsandwindfarms.Themainelectricalwiringisthefirstpartofpowerplant,substationelectricaldesign,isalsoconstituteanimportantpartofthepowersystem.Determinationofthemainwiringofelectricpowersystemasawholeandtherunningreliabilityofpowerplants,substationitself,flexibilityandeconomyarecloselyrelated.Thedesigncomplywiththepowerplantdesignspecifications,andthroughthepowerplant,themainelectricalwiring,auxiliarypowerwiringandtheshort-circuitcurrentcalculation,electricalequipmentselectionandcalibration,relatedtorelayprotectionandlightningprotectiondesign,briefcompletedthe4x200MWcoal-firedpowerplantelectricalpartofthedesignatatime.Allfourgeneratorstep-upaccess220KVpowergrids,simplifiesthenetworkstructureandthemainelectricalwiring,savethecontactbetweenthehighervoltageleveltransformer,reducethelossofthetransformer.Keywords:Powerplants,mainelectricalconnection,protectiverelaying,lightningprotect目录第1章发电厂设计基本概述..........................................................11.1发电厂设计原始资料……….………….…..…………………..11.2设计目的与原则..………………………..……………..……….2第2章发电厂主接线的确定..........................................................32.1主接线设计基本要求……………………………..…………….32.2方案的拟定………………………………………………..….…32.3发电机型号的选择………………………...…………………...62.4主变压器的选择…...……………………………………………7第3章厂用电的设计..................................................................83.1厂用电接线的要求………...……………………...……………83.2厂用电接线设计原则…………………………………..………83.3厂用供电电源……………………………………………………93.3.1厂用工作电源…………………...
