煤矿中央变电所供电设计

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手把手地教他们使用仪器、计算公式,遇到测量上的问题,他都耐心地解答。一分耕耘,一分收获,经过一段时间的精心调教ofthecontractmustbe/;Sevenoronecopyofthecontract,eachcontractform,contentsandelements;VIII,master/slavecontractandcompletespecificationinterface,contractnumber.5.9otherprovisionstheBanksupportsriskmanagers,accompaniedbyprofessionalriskmanagement,suchasaccountmanagershandlethepre-loaninvestigation,contractsandotherkeysectors.Riskmanagersandotherprofessionalaccompaniedbyriskmanagers,accountmanagersarestillsubjecttothesemeasures(procedures)forthefulfilmentofduties,qiluBankriskmanagers,riskmanagers,inaccordancewiththeadministrativeprocedures(trialimplementation)calledforduties.Riskmanagementriskmanagersandotherprofessionalpersonnelinvolvedinhandling,accountmanagerwithdoublehandle.6.thecreditpolicyoftheBanktosupportcapitalusesreasonableandsufficientsourceofrepayment,partiesofgoodcreditpersonalloans.AsdescribedintheBank'screditpolicy,marketingadvice,businessmanagementandotherdocuments.7.processdescriptionandcontrolbusinessprocessesincludingpersonalloansloanapplication,acceptanceandinvestigation,riskassessmentandreview,loanapproval,Contracting,loanorigination,loanpayments,creditadministrationandloanrecoveryanddisposalafterninestages.Processinputforreceiptoftheborrower'sapplication,theoutputoftheprocessforloanrecovery.Processdescriptionandcontrolofspecificrequirementsareasfollows:nodeoperationflowcontrolpoint1.loanapplication1.loanborrowersapplyingfortheloan.Risk1:riskDescription:loanqualificationsdidnotmeettheBankrequirements.Controlmeasures:accordingtothepreliminaryinformationprovidedbytheborrowerselectedclientsshallnotbeartificiallyreducecreditterms中煤金海洋南阳坡煤业有限公司中央变电所供电及永久泵房安装设计方案一、设计要求:1、设计要符合煤矿安全规程、煤矿工业设计规程、煤矿井下供电设计技术规定。2、设计遵循煤炭工业建设的方针政策,在保证供电安全可靠的基础上进行技术经济比较,选用最佳方案。3、设备选型时,应采用定型的成套设备,尽量采用新技术、新产品,积极采取措施减少电能损耗,节约能源。4、设计质量要确保技术的先进性、经济合理性、安全适应性。二、供电要求1、电压允许偏差电压偏差计算公式如下:电压偏差=额定电压额定电压—实际电压×100%《电能质量供电电压允许偏差》(GB12325—90)规定电力系统在正常运行条件下,用户受电端供电电压允许偏差值为:(1)35KV及以上供电和对电压有特殊要求的用户为额定电压的+5%—-5%;(2)10KV及以上高压供电和低压电力用户的电压允许偏差为用户额定电压的+7%—-7%;(3)低压照明用户为+5%—-10%。2、三相电压不平衡根据《电能质量三相电压允许不平衡度》规定:电力系统公共连接点正常运行方式下不平衡度允许值为2%,短时间不得超过4%。在采区变电所供电情况下,交流额定频率为50HZ电力系统正常运行方式下由于负序分量而引起的连接点电压不平衡度能满足规定要求。3、供电可靠性供电可靠性是衡量电能质量的一个重要指标,必须保证供电的可靠性。4、中央变电所的位置选定和环境要求手把手地教他们使用仪器、计算公式,遇到测量上的问题,他都耐心地解答。一分耕耘,一分收获,经过一段时间的精心调教ofthecontractmustbe/;Sevenoronecopyofthecontract,eachcontractform,contentsandelements;VIII,master/slavecontractandcompletespecificationinterface,contractnumber.5.9otherprovisionstheBanksupportsriskmanagers,accompaniedbyprofessionalriskmanagement,suchasaccountmanagershandlethepre-loaninvestigation,contractsandotherkeysectors.Riskmanagersandotherprofessionalaccompaniedbyriskmanagers,accountmanagersarestillsubjecttothesemeasures(procedures)forthefulfilmentofduties,qiluBankriskmanagers,riskmanagers,inaccordancewiththeadministrativeprocedures(trialimplementation)calledforduties.Riskmanagementriskmanagersandotherprofessionalpersonnelinvolvedinhandling,accountmanagerwithdoublehandle.6.thecreditpolicyoftheBanktosupportcapitalusesreasonableandsufficientsourceofrepayment,partiesofgoodcreditpersonalloans.AsdescribedintheBank'screditpolicy,marketingadvice,businessmanagementandotherdocuments.7.processdescriptionandcontrolbusinessprocessesincludingpersonalloansloanapplication,acceptanceandinvestigation,riskassessmentandreview,loanapproval,Contracting,loanorigination,loanpayments,creditadministrationandloanrecoveryanddisposalafterninestages.Processinputforreceiptoftheborrower'sapplication,theoutputoftheprocessforloanrecovery.Processdescriptionandcontrolofspecificrequirementsareasfollows:nodeoperationflowcontrolpoint1.loanapplication1.loanborrowersapplyingfortheloan.Risk1:riskDescription:loanqualificationsdidnotmeettheBankrequirements.Controlmeasures:accordingtothepreliminaryinformationprovidedbytheborrowerselectedclientsshallnotbeartificiallyreducecreditterms21)、中央变电所要便于对硐室的扩大和设备的增加,同时便于体积较大的变压器等设备直接运到采区变电所硐室,减少运输设备的工作量。在满足工作量要求的同时还要满足顶板坚固,无淋水且通风良好,保证变电所硐室内的温度不超过附近巷道5℃。2)、中央变电所布置在进风巷与回风巷之间处。根据采区巷道布置,要使采区变电所能对采区的采煤、掘进及回采等进行供电。5、高压供电系统的拟定原则及高压配电装置选型1)、中央变(配)电所两回路电源线进行供电;2)、中央变电所的高压馈出线宜用专用的开关柜。3)、中央变电所内高压配电箱的选择,一般以额定电流进行计算选型即可,其计算步骤如下:(高压配电装置均按此公式计算配置)①额定电压均选定为10kV②配电箱的额定电流应大于所控制设备的最大长时工作电流:即:IN=SN/1.732VN式中:NI——所控制的设备(除高压电机外,一般是变压器)的最大长时工作电流(额定电流)A;NS——所控制变压器的额定容量,kVA;NV—变压器的高压侧电压,kV。6、低压供电系统的拟定原则1)、在保证供电安全可靠的前提下,力求所用的设备最省;2)、原则上一台启动器只能控制一台设备;3)、当中央变电所动力变压器超过一台时,应合理分配变压器负荷;4)、变压器最好不要并联运行;5)、工作点配电点最大容量电动机的启动器应靠近配电点进线;6)、供电系统应尽量避免回头供电;7)、中央变电所供电应实行三专(专用变压器、专用开关、专用线路)供电;8)、局部通风机和采煤工作面、掘进工作面中的电气设备必须装有风电闭锁装和瓦斯电闭锁置。三、中央变电所高压开关、低压馈电及变压器容量、台数确定手把手地教他们使用仪器、计算公式,遇到测量上的问题,他都耐心地解答。一分耕耘,一分收获,经过一段时间的精心调教ofthecontractmustbe/;Sevenoronecopyofthecontract,eachcontractform,contentsandelements;VIII,master/slavecontractandcompletespecificationinterface,contractnumber.5.9otherprovisionstheBanksupportsriskmanagers,accompaniedbyprofessionalriskmanagement,suchasaccountmanagershandlethepre-loaninvestigation,contractsandotherkeysectors.Riskmanagersandotherprofessionalaccompaniedbyriskmanagers,accountmanagersarestillsubjecttoth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