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本科生毕业设计(论文)I摘要电在人们的日常生活中扮演着十分重要的角色,所以变电所的设计也就显得尤为重要。本设计是对于德州66kV/10kV变电所的设计。运用所学的知识,对变电所进行具体的设计。首先根据任务书的已知数据对所给的负荷进行分析,之后确定负荷计算方案并进行负荷计算。为了使系统中的无功功率达到要求,需要设计无功补偿方案,并对变压器进行选择。根据实际情况确定电气主接线方式,并选择短路点进行短路计算。通过短路计算得出的短路电流的有效值与峰值,进行电气设备的选择与校验。在将这些工作系统设计完之后,进行电力系统继电保护的设计,根据之前求出的短路电流跟长时工作电流对变压器保护、补偿电容器保护进行设计,最后再对变电所的防雷与接地系统进行设计。在对变电所进行设计的过程中,首先需要考虑变电所供电的可靠性,需要保证变电所遇到突发事故的时候不至于造成重大的损失。并且要注意的是,在保证可靠性的同时,还要保证经济性,要考虑建设变电所所需投资的费用,使投资尽可能少。关键词:电力系统;变电所;电气主接线;继电保护本科生毕业设计(论文)IIAbstractElectricityinPeople'sDailylifeplaysaveryimportantrole,sothedesignofthesubstationisparticularlyimportant.Thisdesignforthe66kv/10kvDezhousubstation.Usingthelearnedknowledge,forthedesignofspecificsubstation.Firstofall,accordingtothespecificationoftheknowndatatoanalyzetheload,accordingtotheknownloadafterloadcalculation.Inordertomakethesystemreactivepowerrequirements,reactivepowercompensationschemeneedstobedesigned,andchoosethetransformer.Choosethemainelectricalwiringaccordingtoactualsituation,Andshort-circuitpointselectionforshortcircuitcalculation.Accordingtotheshortcircuitcalculationofshort-circuitcurrentRMSandpeak,afterchoosingelectricequipmentandcheck.Willtheseworkafterthesystemdesign.Forthedesignofpowersystemrelayprotection,Accordingtocalculateshortcircuitcurrentandlongbeforetheworkingcurrentofthetransformerprotection,compensationcapacitorprotectiondesign.Atlast,thedesignoflightningprotectionandgroundingprotection.Intheprocessofdesignofthesubstation,firstofall,needtoconsiderthereliabilityofthesubstationpowersupply,andNeedtomakesurethatsubstationmeettheaccidentnotcausesignificantlosses.Andnote,Intheguaranteeofreliabilityatthesametime,andtoensuretheeconomy.thentoconsiderthecostoftheinvestmentneededforconstructionofsubstation,makeinvestmentinaslittleaspossible.Keywords:Powersystem;Substation;Themainelectricalwiring;Relayprotection本科生毕业设计(论文)III目录第1章绪论..........................................................................................................11.1变电所的意义与分类...............................................................................11.2德州变电所的地理位置与气候...............................................................1第2章负荷计算....................................................................................................32.1负荷的意义...............................................................................................32.2负荷计算的方法.......................................................................................42.3负荷计算...................................................................................................5第3章无功补偿方案............................................................................................73.1无功补偿的意义.......................................................................................73.2无功补偿器的选择...................................................................................73.3系统无功功率的平衡...............................................................................9第4章变压器台数及容量..................................................................................114.1变压器的种类与特点.............................................................................114.2变压器容量及数量.................................................................................124.3变压器的形式与结构.............................................................................13第5章电气主接线设计......................................................................................155.1电气主接线的意义.................................................................................155.2电气主接线设计的基本要求.................................................................155.3电气主接线的基本形式与特点.............................................................165.4主接线形式的选择.................................................................................19第6章导线的选择及校验..................................................................................226.1选择导线的条件.....................................................................................226.2导线的选择与校验.................................................................................22第7章短路计算..................................................................................................257.1短路的种类与危害.................................................................................257.2短路计算的意义与步骤.........................................................................267.3短路计算.................................................................................................27第8章电气设备选择与校验..............................................................................308.1电气设备的选择与检验条件.................................................................308.2电气设备的选择与校验.........................................................................31本科生毕业设计(论文)IV第9章变压器保护与电容器保护的设计..........................................................419.1变压器的故障与不正常运行状态.........................................................419.2变压器保护的种类与意义.....................................................................419.3变压器保护的设计..................................................
本文标题:66kv-10kV变电所电气部分设计
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