110KV上秦变电站电气部分及站用电初步设计毕业设计.pdf

摘要

随着国民经济的迅速发展,我国电力需求迅速增长,使得电网规模不断扩大、结构越

来越复杂,而变电站对于电力的生产和分配起到了举足轻重的作用。变电站是电网建设

和电网改造中非常重要技术环节。近年来,变电站技术处于高速发展的过程中,随着国内

外气体缘金属封闭开关设备GIS系统和综合自动化技术的应用,变电站向着占地面积小、

灵活性高、易于检修的趋势发展。本次设计为110kV变电站电气部分初步设计,并绘制

电气主接线图及其他图纸。该变电站设有两台主变压器,站内主接线分为110kV、10kV

两个电压等级。本次设计中进行了电气主接线的设计、短路电流计算、变压器的选择、

主要电气设备选择,包括断路器、隔离开关、电流互感器、电压互感器、母线等、各

电压等级配电装置设计。

关键词：变电站电气主接线短路电流

AbstractAbstract

Withtherapiddevelopmentofthenationaleconomy,Chinasrapidgrowthin

electricitydemand.Makepowergridsstructurehavebeenexpandingmoreandmorecomplex

substationsforelectricpowerproductionanddistributionplayanincreasinglyimportantrole.

Substationisveryimportanttechnicalaspectofapowergridconstructionandtransformation

ofelectricalnetworks.Inrecentyears,thetechnologyofsubstationisintheprocessofrapid

developmentwithdomesticandinternationalgas-insulatedmetal-enclosedswitching

equipmentsystemsandintegratedautomationtechnology(GIS)applications,thecity

substationinasmallfootprint,flexible,easytooverhaulthetrendofdevelopment.Wehaveto

designprimarypower-systemof110kVsubstationanddrawmainelectricalone-linediagram

andothers.Therearetwomaintransformerinthesubstation,inwhichmainelectrical

connectioncanbedividedintotwovoltagegrades:110kV,10kV.Thereisalsoadesignfor

mainelectricalconnectioninthisengineering,thecalculationforshort-circuitelectriccurrent,

theselectionofelectricaldeviceandcalibration(includingcircuitbreaker,isolator,current

transformer,potentialtransformer,busbaretc.)andthedesignfordistributioninstallationper.

voltagegrade.

KeywordsKeywords:substationmainelectricalconnectionshortcircuitcurrents