110kV变电站二次系统设计,论文前4页【参考】.docx

摘要本次毕业设计的题目是110kV变电站二次系统设计，主要内容是变电站继电保护的配置与整定计算。变电站是电力系统中连接发电厂和用电单位的重要组成部分，变电站的安全运行意义重大。继电保护是变电站的重要组成部分。本次设计用到继电保护的三段保护和电流速断保护，其中110kV侧配置的是三段距离保护，35kV侧配置的是电流速断保护与三段距离保护，10kV侧配置的是电流速断保护。合理的选择保护方式保证了电力系统的经济性和灵活性，减轻电力系统的负担，降低安全隐患。设计分了五个章节，其中第二章给出了系统的原始数据和一次部分的数据；第三章确定了互感器的选择和主接线方式；第四章是最继电保护的介绍、配置、整定计算，其中详细介绍了瓦斯保护、灵虚电流保护、纵联差动保护；第五章是短路电流的计算。关键词：电力系统，变电站，继电保护，整定计算，短路电流AbstractThe graduation design topic is 110kV substation secondary system design, main contents of configuration and setting calculation of relay protection of substation. Substations are connected in the power system of power units in power plant and an important part of substation safe operation is of great significance.Important component of relay protection of substation. This design used to relay protection of three protection and current fast-tripping protection, which is three distance protection of 110kV-side configuration, 35kV side configuration is current quick-break protection with three distance protection, 10kV side configuration is current quick-break protection. Reasonable choice of protection to ensure the power system economy and flexibility, reduce the burden on power systems, reducing security risks.Design points has five a chapters, which second chapter to out has system of original data and a times part of data; third chapter determine has transformer device of select and main wiring way; fourth chapter is most following electric protection of introduced, and configuration, and whole set calculation, which detailed introduced has gas protection, and spirit virtual current protection, and longitudinal joint poor moving protection; fifth chapter is short-circuit current of calculation.Key words: electrical systems, substation, and relay protection, the setting, the short-circuit current目录1 绪论12 原始参数22.1 主变压器及线路主要参数22.2 变电站电气主接线简介32.3 电气主接线方案比较及选择33 电压、电流互感器的配置与接线53.1 电流互感器的选择53.2 电流互感器的配置53.3 电压互感器的选择与配置74 短路电流计算94.1 短路电流计算的意义94.2母线短路电流的计算94.2.1主变标幺值参数计算94.2.2三相对称短路电流的计算104.2.3不对称短路电流计算