风火打捆直流外送系统输电能力研究
Research on Transmission Capacity of Wind-fire Bundled DC Delivery System
董雪涛1
作者信息
- 1. 国家电网有限公司西北分部,陕西 西安 710048
- 折叠
摘要
随着大规模新能源并网和特高压交直流工程的投运,风火打捆直流外送系统稳定特性发生变化.研究了风火打捆直流外送系统和直流输电系统数学模型,介绍了送端系统发生直流闭锁故障后的直流和风电机组暂态特性,并以我国某送端电网为例,分析了风火比例和交直流耦合特性对风火打捆系统外送能力的影响.仿真结果表明,系统动稳问题显著,断面外送能力受制于系统阻尼特性,随着风电占比的提高,系统外送能力将大幅降低.
Abstract
With the operation of large-scale new energy grid connection and UHV AC/DC projects,the stability characteristics of the wind-fire bundled DC delivery system have changed.The mathematical models of wind-fire bundled DC delivery system and DC power transmission system are studied,and the transient characteristics of DC and wind turbines after DC blocking fault occurs in the feeder system are analyzed.Taking a feeder grid in China as an example,the effects of wind-fire ratio and AC-DC coupling characteris-tics on the delivery capacity of wind-fire bundled system are analyzed.The simulation results show that,the dynamic stability problem of the system is significant,and the section delivery capacity is subject to the damping characteristics of the system.As the proportion of wind power increases,delivery capacity of the system will be greatly reduced.
关键词
风火打捆/直流闭锁/暂态特性/动态特性Key words
wind-fire bundled/DC blocking/transient characteristics/dynamic characteristics引用本文复制引用
基金项目
国家电网科技项目(SGNW0000DZJS2310224)
出版年
2024
NETL
NSTL
万方数据