kV变电所一次及二次.docVIP

　　　　　 110kV变电所一次及二次 系统的设计 学生姓名：指导教师： 所在院系：工程学院电气工程系 所学专业： Design of 110 kV Substations Primary and Secondary System Name：Qu Jiahui Supervisor：Ren Yanjie Department：Electrical Engineering Department Engineering Academy Speciality： Electricalngineering and Automation Research Direction： The Locality Electric Power System and Its Automation Northeast Agricultural University Harbin · China June 2010 摘 要 本次设计的内容为110kV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，本变所有一处二类负荷，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10k出线。对10kV出线装设速断和过电流保护，对10V电力电容器装设无时限过电流保护和过电压保护。本变电所装设两台等容量主变，主变采用双绕组变压器型变压器。选择LW6110Ⅰ/2500、SN410G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 choice of main wiring, high pressure equipment and all kinds of the protection of relay, the calculation of load, short current and so on in detail, especially, the choice of main wiring, transformer and some electric equipment such as circuit breaker, current and Voltage sensor. This design is closely related to reality in order to design the suitable substation by studying a lot of materials. Our country big and parts charged barbed wire net is weak to change to give or get an electric shock a quantity little, the power supply radius is long, the circuit exhausts big, cause circuit bitter end customer electric voltage over low, ring people right living with produce. Attain to changes quickly current condition in charged barbed wire net in our country. Satisfy people the life to look after both sides with the electricity the work agriculture develop, choosing to design an a terminal change to give or ge