特高压直流接入对上海电网静态安全影响的分析

发布时间：2018-02-21 03:28

本文关键词： 特高压直流上海电网静态安全分析　出处：《上海交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：采用特高压直流输电技术可以实现远距离大容量输电,对于解决我国能源与电力负荷分布不均衡以及电能传输通道和全国联网等问题具有重要意义。2013年上海电网通过特高压复龙——奉贤直流输电工程将特高压直流输电引入上海,±800kV的特高压直流输电线路在上海奉贤区的奉贤换流站落地,经由奉贤站换流后,分成3路500kV线路进入远东500kV变电站并入上海电网。2013年夏季复奉特高压直流系统传输的潮流更是达到了上海总用电负荷的四分之一。特高压直流输电在为上海电网提供大量电能的同时,也会因为与上海电网相互作用而对上海电网的运行产生影响,给上海电网的安全运行带来挑战,研究特高压直流接入后的上海电网安全问题具有重要意义。本文重点研究复奉直流特高压输电线路接入上海电网后,在迎峰度夏满负荷送电时期对上海电网静态安全运行影响的情况,为目前的上海电网运行以及将来的电网规划提供参考。本文首先详细分析复奉特高压直流输电系统及其接入上海电网的方式;然后利用电力系统分析综合程序(PSASP仿真软件)进行电网搭建;最后以2013年夏季上海电网运行方式为对象,在仿真模拟复奉直流系统单极闭锁和双极闭锁、500kV线路(贤远5183或远亭5135)单线故障、双线故障(奉远5181线与奉东5182线),以及远东站单台主变故障等多种不同类型故障的基础上,分析2013年夏季高峰负荷下的上海500kV电网静态安全以及上海远东分区电网静态安全情况。通过仿真分析得出的一些结论可供上海电网运行与规划部门参考。
[Abstract]:Using UHV DC transmission technology can realize long distance and large capacity transmission. It is of great significance to solve the problems of unbalanced distribution of energy and power load, power transmission channels and national networking. In 2013, Shanghai Power Grid will transmit UHVDC through UHV Fulong-Fengxian HVDC transmission project. Introduction of Shanghai, 卤800 kV UHV HVDC transmission line to the ground at Fengxian converter station in Fengxian District of Shanghai, After commuting through Fengxian Station, Divided into three 500kV lines into the far East 500kV substation incorporated into the Shanghai power grid. In 2013, the power flow of UHVDC system in the summer of 2013 reached 1/4 of the total power load in Shanghai. While providing a lot of electricity, It will also have an impact on the operation of the Shanghai Power Grid because of its interaction with the Shanghai Power Grid, which will bring challenges to the safe operation of the Shanghai Power Grid. It is of great significance to study the security of Shanghai Power Grid after UHV DC connection. The influence on the static and safe operation of Shanghai Power Grid during the period of full load power transmission in summer, It provides a reference for the current operation of Shanghai power grid and the future power network planning. Firstly, this paper analyzes the FVHVDC system and the way to connect to Shanghai power grid in detail. Then the power system analysis software PSASP is used to build the power network. Finally, the operation mode of Shanghai power grid in the summer of 2013 is taken as the object. On the basis of simulation and simulation of single pole locking and bipolar locking of 500kV lines (Xianyuan 5183 or Yuanting 5135), double line faults (Fengyuan 5181 line and Fengdong 5182 line), and single station main transformer fault of far East station, etc. The static security of Shanghai 500kV power network under summer peak load in 2013 and the static security of Shanghai far East power network are analyzed. Some conclusions obtained by simulation analysis can be used as reference for Shanghai power network operation and planning department.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM721.1;TM732

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