某中型火电厂电气部分设计—毕业设计.doc

陕西理工学院毕业设计II某中型火电厂电气部分设计[摘要]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。而火力发电是现在电力发展的主力军，在现在提出和谐社会，循环经济的环境中，我们在提高火电技术的方向上要着重考虑电力对环境的影响，对不可再生能源的影响，虽然现在中国已有部分核电机组，但火电仍占领电力的大部分市场，近年电力发展滞后经济发展，全国上了许多火电厂，但火电技术必须不断提高发展，才能适应和谐社会的要求。本次毕业设计的题目是《某中型火电厂电气部分设计》。,在设计的过程中,根据设计任务书的要求以及变电站的地理环境,容量和各回路数确定火电厂各电压等级电气主接线和厂用电接线,并且选择了各变压器的型号;进行参数计算,画等值网络图,并计算各电压等级侧的短路电流,列出短路电流结果表;计算回路持续工作电流,选择各种高压电气设备,并根据相关技术条件和短路电流计算结果表校验各高压设备.[关键词]主接线；短路电流；电气设备；主变保护；配电装置；防雷接地TheDesignOftheMiddleelectricalpartOfSteampowerplantAbstract:Powerplantisanimportantpartofpowersystem,whichdirectlyaffectsthesecurityandeconomyofthewholepowersystem..Thepowerplantistheroleofotherformsofenergyintoelectricity.Accordingtotheenergyconversionformofcoalpowerplant,nuclearpowerplantandwindpowerplant.Andthermalpowerisnowthemainforceofthedevelopmentofelectricpower,nowputforwardharmonioussociety,circulareconomyenvironment,weinthedirectionofimprovingthethermalpowertechnologytofocusoneffectsofpowerontheenvironment,doesnotaffecttherenewableenergy,althoughnowChinahasbeenpartofthecoremotorgroup,butpowerisstilloccupyingpowerofthemajorityofthemarket,inrecentyearspowerdevelopmentlageconomicdevelopmentthroughoutthecountry,themanythermalpowerplant,butthermalpowertechnologymustenhancethecontinuousdevelopmentinordertomeettherequirementsofharmonioussociety.Accordingtothedesignrequest,inthedesignprocess,accordingtothetransformersubstationgeographicalenvironment,thecapacityandvariousreturnroutesnumberdeterminedthetransformersubstationelectricityhostwiringandthestationuseelectricitythewiring,andchoosesvarioustransformersthemodel;Carriesontheparametercomputation,thepictureequivalentnetworkchart,andcalculatesvariousvoltagesranksidetheshort-circuitcurrent,liststheshort-circuitcurrentresulttable;Calculatesthereturnroutecontinuallyoperatingcurrent,chooseseachkindofhighpressureelectricalequipment,andverifiesvarioushighpressureunitaccordingtothecorrelationengineeringfactorandtheshort-circuitcurrentcomput