和0kv降压变电所的电气部分

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1、长春工业大学学士学位论文摘要变电所是联系发电厂和用户的中间环节，起着变换和分配电能的作用。本文设计的是66/10kV降压变电所的电气部分。是为了保证供电的可靠性、安全性以及满足远期负荷需要的要求，按照远期负荷规划进行初步设计，达到能够保证变电所长期可靠供电的目的。设计内容包括变电所的负荷计算、变电所主接线设计、短路计算、变压器的继电保护设计、防雷设计等。根据负荷计算，确定主变的型号及台数。选定容量10000kVA，两台并列运行；通过对主接线预选方案的经济和技术比较，确定主接线的接线方式；短路计算时先将其改为标幺值再计算其短路电流；变压器的继电保

2、护根据变压器的容量，确定继电保护的保护种类和方式，过流保护保护和差动保护为变压器的主保护，瓦斯保护作为其后备保护；防雷设计根据变电所的大小确定避雷针的个数和高度。本文设计是针对生产实践，通过分析、计算、比较和论证等设计步骤完成了变电所电气部分设计，能够满足变电所稳定安全供电的要求。关键词：变电所，主接线，短路计算，继电保护II长春工业大学学士学位论文66kVStep-downTransformerSubstationDesignAbstractTransformersubstationistheconnectionofpowerplantsan

3、dusers,playingaroleoftransforminganddistributingelectricenergy.Thisarticledesignedthesubstationis66/11KVSubstationelectricalpartdesign.Forthesakeofdependablethatguaranteethepowersupplywitharequestthatcontentedlong-termburthen,carriesaccordingtotheforwardtheprogrammingproceed

4、ingdesigndevelopments,frombutguaranteetochangetogiveorgetanelectricshockcanlong-termdependablepowersupply.Designisthemaincontentsofthesubstationload,short-circuit,thewiringdesignofthemainsubstation,Transformerrelaydesign,minedesign.Thedesignforthemajorpartoftheelectricalsubs

5、tationdesign,completepowersubstationsecurityandstability.Substationknownunderconditionsoftheload,todeterminethemaintransformerandtheModelNumber.Capacityof10,000KVAselected,twoparalleloperation;Throughthemainwiringprimariesprogramofeconomicandtechnicalaspectsofdeterminingthem

6、ainwiringconnection;short-circuitthecalculationofitsfirst11tosubscriptcalculatethevalueofitsshort-circuitcurrent;Accordingtothetransformerrelaytransformercapacity,overcurrentprotectionandformsandgasdifferentialprotectionandtheprotectionofthemaintransformerprotection,theprote

7、ctionrelaydeterminethetypesasitsbackupprotection;minedesignbasedonthesizeofsubstationstodeterminethenumberoflightningandhighThisarticleismainlyforthepractice,morecalculating,thenumericalcalculationtomeettheelectricitysubstationstabilizationofthesecurityrequirementsKeywords：T

8、ransformerSubstation;MainWiring;Short-circuitCalculation;RelayProtection；II