学告姓名：指导教师：所在院系：工程学院电气工程系 所学专业：电气工程及其自动化研究方向：地方电力系统及其自动化
Design of 110kVSubstationsPrimary andSecondarySystem
Name: Qu JiahuiSupervisor : Ren YanjieDepartment: Electrical Engineering DepartmentEngineering AcademyElectrical EngineeringSpeciality: andAutomationResearch Direction: The Locality Electric PowerSystem and Its Automation
Northeast Agricultural UniversityHarbinChinaJune 2010
摘要
本次设计的内容为110kV变电所一次及二次系统的设计.文中对主接线的选择、高压设备的选择、负荷计算、短路电流计算，各种继电保护选择和整定计算皆有详细的说明.特别对主接线的选择，变压器的选择，还有一些电气设备如断路器、电压互感器等的选择校验作了详细的说明和分析.本次设计的内容紧密结合实际，通过查找大量相关资料，设计出符合当前要求的变电所.
我国大部分电网薄弱，供电半径长，线路损耗大，致使线路末端用户电压过低，影响人民正常的生活和生产.为了满足人民生活用电兼顾工农业发展，选择设计一座110kV终端变电所，主要供给地方负荷，以三类负荷为主，有少量的二类负荷，尽可能采用电气性能好、价格低廉的新型设备.110kV双回路进线，本变一处二类负荷， 其余均为三类负荷，生活用电和工业负荷比重较大，共有8条10kV出线.对10kV出线装设速断和过电流保护，对10kV电力电容器装设无时限过电流保护和过电压保护.LW-110I/2500、SN-10G型断路器，据电压互感器的用途装设地点及额定电压，选择JDZ-10型电压互感器.出线采用断路器与保护控制器配合作为控制和保护.对主变压 器装设瓦斯保护、过电流保护、过负荷保护、电流速断保护、零序保护.
关键词：110kV变电所：主接线：电气设备：继电保护
Abstract
This paper mainly introduces the design of 110kV substation. It also discusses the choiceload short current and so on in detail spcially the choice of main wiring transformer and some of main wiring high pressure equipment and all kinds of the protection of relay the calculation ofelectric cquipment such as circuit breaker current and Voltage sensor. This design is closelyrelated to reality in order to design the suitable substation by studying a lot of materials.
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Keyword : 110kV substation : main wiring : clectrical cquipments : relay protection
目 录
Abstract. 摘要..1前. ..I 12负荷统计及计算. 22.2对原始资料的分析计算. 2.1负荷统计. 22.3确定电压等级.. 2 32.4确定回路数及总负荷计算. 33主变的选择及主接线的确定. 63.1主变压器的选择... 3.1.1主变台数的确定 6 63.1.2 变压器形式的选择.. 63.1.3 主变容量的确定 64短路电流计算. 3.2主接线设计方案的确定.. 74.1概述. 9 94.1.1 短路的概念. 94.1.2 形成短路的原因. 94.1.3 4.1.4 短路电流的危害... 短路电流计算的目的. 9 94.2短路电流计算中短路点的确定 104.3短路电流计算. 104.3.1最大运行方式情况下短路电流计算 105电气设备的选择及校验， 4.3.2最小运行方式情况下的短路电流计算 14 195.1母线的选择.. 195.1.1110kV侧母线的选择 195.2线路的选择. 5.1.210kV侧母线的选择 20 215.2.1进线的选择 225.2.210kV出线的选择. 225.3断路器的选择及校验. 235.3.1总述 5.3.2110kV侧断路器的选择及校验 23 235.3.310kV侧断路器的选择及校验. 245.4隔离开关的选择及校验.. 25
