文档介绍：重庆大学工程硕士学位论文 中文摘要
中文摘要
输电系统串联补偿技术是在交流输电系统中利用串联电容器的容性阻抗,补偿输电线的部分感性阻抗,使得发电机组间电气距离缩短,同步力矩增大,达到改善系统稳定性,减少功率输送引起的电压降和功角差,从而提高电力系统稳定运行水平,扩大线路输送容量,提高网络实际输送能力的目的。
二十世纪末,为了缓解中国的缺电状态,于1998年建成并投运了中国最大的水电站~二滩电站,同时,也形成了四川500kV’’Y”形电网。但二滩近300万kw电力输送通过3条近470km的线路送至自贡洪沟站,沿线环境恶劣、地质复杂,通道横穿重冰区、高海拔、多雷区的大小凉山,线路故障率较相同电压等级线路高, 使得由于线路的小扰动而导致大电网事故几率大大增大。为了加强四川二滩输电系统的送电能力和提高四川I电网的稳定性,四川省电力公司决定在500kV普提开关站加装串联补偿装置。
论文结合500kV普提开关站的具体情况和串联补偿装置技术的工程应用实际, 重点分析了串补对潜供电流及线路断路器恢复电压的影响;研究了串补线路过电压保护措施及串补电容器和金属氧化物限压器能量的配置;并提出了500kV普提开关站串补阻尼回路的选型和参数设计。
理论分析和工程应用结果表明,本文分析得到关于500KV普提开关站串补设备特征、特性和串补装置引来相应系统问题的结论为相关变电设备的选择、技术改进和工程施工提供了参考,并为普及串联补偿在超高压线路的应用技术以及串补设备(目前应用国外进口产品)的调度、运行维护、操作规范、检修试验等提供了技术依据和理论支撑,可进一步提高四川500kV系统的输电可靠性。
关键词:串补装置 系统影响 保护措施 设备配置
重庆大学工程硕士学位论文 ABSTRACT
Abstract
By introducing reactance of opposite sign to that of the inductive line reactance to
shorten the electrical distance and increase the synchronous torque between different generators,pensation technique of AC transmission system call improve the stability of power system,reduce voltage drop and relative power angles,thereby adding further capability as well as flexibility to AC power transmission.
In order to alleviate the power shortage,Ertan,the largest hydropower station by the end of the 20th century in China,had been constructed and put into operation in 1 the same time,the”Y”一shaped 500kV power grid came into being in
are near 3000 MW power delivered to the Honggou
5 00kV substation of Sichuan power grid which is located in across high-altitude,heavy-iced Liangshan area with abominable climate and geological environment and over distances of 470km,the three circuits of 500kV transmission lines face more pressure on transmission reliability and stability than the same voltage
level lines.
For the purpose of increasing the delivering capacity and reliability of transmission channel of Ertan hydropower station,series pensation equipments for three circuits of 500kV transm