文档介绍：220kV变电站的设计_毕业设计
摘要
随着经济的发展和现代工业建设的迅速崛起,供电系统的设计越来越全面、系统,工厂用电量迅速增长,对电能质量、技术经济状况、供电的可靠性指标也日益提高,因此对供电设计也有了更高、更完善的要求。设计是否合理,不仅直接影响基建投资、运行费用和有色金属的消耗量,也会反映在供电的可靠性和安全生产方面,它和企业的经济效益、设备人身安全密切相关。
变电所是电力系统的重要组成部分,起着电能的接受、分配、联络、稳定系统的重要作用。电气主接线是变电所的主要部分,电气主接线的方式直接影响运行的可靠性、灵活性,它的拟定直接关系着电气设备的选择、配电装置的布置护,是变电所电气部分投资大小的决定性因素。
220kV变电站属于高压网络,该地区变电所所涉及方面多,考虑问题多,分析变电所担负的任务及用户负荷等情况,选择所址,利用用户数据进行负荷计算,确定用户无功功率补偿装置。同时进行变压器的选择,从而确定变电站的接线方式,再进行短路电流计算,选择送配电网络及导线,进行短路电流计算。选择变电站高低压电气设备,为变电站平面及剖面图提供依据。
本次220kV变电所电气部分设计是根据河南理工大学电气学院本科毕业设计工作手册进行的,主要包括主变压器、主接线形式的确定;短路电流计算;电气设备的选择;继电保护及互感器的配置;防雷保护等几个部分。
关键词:负荷计算;主接线;短路电流计算
Abstract
With the economic development and modern industrial building of the rapid rise of the design of the power supply system more and prehensive, systematic, and rapid growth of electricity consumption in factories, on the power quality, technical and economic conditions, indicators of the reliability of electricity supply improves, so design of power supply has been higher and prehensive requirements. The design is reasonable, not only directly affects the investment in infrastructure, operation costs and the consumption of non-ferrous metals will be reflected in the electricity supply reliability and security of production, it is the economic efficiency of enterprises, is closely related to personal safety equipment.
Substation power system is an ponent of the power,and plays an important role of acceptance, distribution, contacts , the stability of the system. The main electrical substation wiring is a major part of Substation power system ,the main electrical wiring running directly impacts the reliability, flexibility, and its formulation directly related to the choice of the electrical equipment ,retaining the arrangement of power distribution equipment, The main electrical substation wiring is part of the decisive factor in the size of electrical substation investment.
220kV substation belongs to high-work ,the region more involved, consider the problems and an