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1、摘要 随着我国工业的发展，各行业对电力系统的供电可靠性好稳定性的要求日益提高。变电站是连接电力系统的中间环节，用以汇集电源、升降电压和分配电能。变电站的安全运行对电力系统至关重要。本次毕业设计以110KV变电站为主要设计对象，该110KV变电站是地区重要变电站，是电力系统110KV电压等级的重要部分。该变电站设有2台主变压器，站内主接线分为110KV、35KV和10KV三个电压等级。 本设计的第一章为绪论，主要阐述了变电站在电力系统中的地位以及发展趋势，设计变电站的原则、目的以及变电站的基本情况和相关基本概念。第二章是负荷计算及变压器的选择，根据已知的变电站负荷资料对变电站进行负荷计算，通过得
2、出的负荷确定了主变压器的容量、台数、型式及阻抗，并进行无功补偿的计算。第三章是变电站电气主接线的设计，分别通过对110KV、35KV、10KV侧电气主接线的拟定，选择出最稳定可靠的接线方式。第四章是短路电流计算，首先确定短路点，计算各元件的电抗，然后对各短路点分别进行计算，得出各短路点的短路电流。第五章是电气设备的选择，电气设备包括母线、断路器、隔离开关、电流和电压互感器、熔断器、接地刀闸和电抗器。第六章是继电保护，主要从变压器、母线、输电线路等方面阐述继电保护的配置原则及整定计算。第七章是无人值守变电站自动化系统部分，主要讲述无人值班变电站的实现方式。 通过对110KV变电站的设计，是我对电
3、气工程及其自动化专业的主干课程有了一个较为全面、系统的掌握，增强了理论联系实际的能力，提高了工程意识，锻炼了我独立分析和解决电力工程设计问题的能力。关键词：单母线分段主接线 短路计算 变压器继电保护 无人值班Abstract With the development of industry , the increasing requirements of the various sectors of the stability of power system reliability . The transformer substation is connected to the power s
4、ystem of intermediate links, to bring together the power , lifting voltage and distribution of electric energy .Substation safe operation of the power system is essential. This graduation project take the 110KV transformer substation as the main design object, this 110KV transformer substation is th
5、e local important transformer substation, is the electrical power system 110KV voltage rank important part. This transformer substation is equipped with 2 main transformers, in the station the host witing divides into 110KV, 35KV and 10KV three voltages ranks. This design first chapter is an introdu
6、ction, mainly elaborated the transformer substation in electrical power system status. Designs the transformer substation the principle and the goal as well as the transformer substation basic situation. Second chapter is shoulders the computation and the transformer choice, carries on the load comp
7、utation according to the known transformer substation load material to the transformer substation. Through the load which obtains had determined the host changes the capacity and a number, the host change the pattern, the winding wiring way, the accent press the way and the host changes the impedanc
8、e. Third chapter is the transformer substation electricity host wiring design, separately through to 110KV, 35KV, 10KV side electricity host wiring drawing up, chooses the stablest reliable wiring way. Fourth chapter is the short class computation, first determined short-circuits the spot,calculates
9、 various parts reactance, then to respectively short-circuits separately to carry on the computation, obtains respectively short-circuits the short-circuit current. Fifth chapter is the electrical equipment choice, the electrical equipment including the generatrix, the circuit breaker, the isolator,
10、 the electric current and the voltage transformer, the fuse, grounding switch and reactor. Sixth chapter is relay protection, mainly from the transformer substation, the host wiring, transmission lines describes the configuration of the relay protection principles and setting calculation. Seventh ch
11、apter is part of unmanned substation automation systems,focuses on the implementation of the unmanned substation . Through to the 110KV transformer substation design, causes me has to the electrical engineer and its the automated specialized branch curriculum to be comprehensive, system grasping, st
12、rengthened apply theory to reality the ability, raised the project consciousness, exercised me independently to analyze and the solution electric power project design question ability.Key words: Single busbar main wiring Short-circuits the computation Transformer protection Unmanned substation autom
13、ation systems1目录摘要IAbstractII1.绪论11.1变电站的设计原则和目的11.2变电站的基本情况11.3变电站相关基本概念22.负荷计算及变压器的选择42.1负荷计算42.1.1负荷资料42.1.2负荷计算42.2主变压器的选择52.2.1主变压器容量和台数的确定52.2.2主变压器型式的确定62.2.3.1绕组连接方式选择62.2.4.2调压方式的选择62.2.5主变压器阻抗的选择62.3无功补偿72.3.1补偿作用72.3.2补偿容量的计算72.3.3电容器接线方式93.电气主接线的设计113.1主接线设计的要求及原则113.1.1设计要求113.1.2设计原则12
14、3.2主接线形式的选取133.2.1 110KV侧主接线方案的选取133.2.2 35KV侧主接线方案选取163.2.3 10KV侧主接线方案选取184.短路电流计算204.1短路电流计算的目的204.2短路电流计算214.2.1各元件电抗计算及等值电路图214.2.2 110KV母线侧短路电流的计算234.2.3 35KV母线侧短路电流的计算244.2.4 10KV母线侧短路电流的计算255.电气设备的选择265.1电气设备选择的一般原则265.2载流导体的选择275.2.1 110KV侧载流导体的选择275.2.2 35KV侧载流导体的选择285.2.3 10KV侧载流导体的选择295.3
15、 断路器和隔离开关的选择及校验315.3.1 110KV侧315.3.2 35KV侧325.3.3 10KV侧345.4 电流互感器的选择375.4.1 110KV侧电流互感器的选择375.4.2 35KV侧电流互感器的选择385.4.3 10KV侧电流互感器的选择395.5 电压互感器的选择395.6 高压熔断器的选择415.7 电抗器的选择415.8接地刀闸的选择435.9 避雷器的选择436.继电保护456.1电力系统继电保护配置原则466.1.1变压器保护配置原则466.1.2输电线路保护配置原则486.2继电保护整定计算546.2.1继电保护整定计算的目的546.2.2继电保护整定计算的基本任务556.2.3继电保护整定计算的步骤566.2.4变压器保护相关整定计算567.变电站综合自动化607.1变电站无人值班自动化概述617.1.1变电站无人值班自动化系统配置模式617.1.2变电站自动化体系结构647.1.3变电站无人值班自动化系统设计要求657.1.4变电站无人值班自动化应具备的条件657.2变电站远程监控系统657.2.1变电站远程监控系统设计原则657.2.2变电站远程监控系统的监控功能66
