电力系统自动化2016，Vol.40Issue(6)：71-77,7.DOI:10.7500/AEPS20150413003
接入弱交流系统的背靠背直流输电系统控制策略改进
Improvement of Back-to-back DC Transmission System Control Strategy for Weak AC System
蒋维勇 1刘建琴 1韩丰 1王峤1
作者信息
- 1. 国网北京经济技术研究院，北京市 100052
- 折叠
摘要
Abstract
Constant extinction angle control for the inverter will cause a rather strong coupling effect between rectifier and inverter but a few actions of the tap changer on both sides.On the contrary,when constant voltage control is adopted a weak coupling effect but more times of the tap changer action.Based on an analysis of the advantages and disadvantages of constant extinction angle control and constant voltage control,an improved control strategy is proposed.With the improved strategy, the DC voltage will be controlled by the extinction angle of inverter while the DC voltage order should be calculated based on power order.The tap changer of the inverter converter transformer will be controlled so that the extinction angle stays between 1 7.5°and 21.5°.The improved control strategy retains the advantage of constant extinction angle control and constant voltage control.A control strategy is also provided to coordinate the tap changer control and reactive control.With the control strategy,the repeated action of tap changer will be prevented.An example based on a plan project shows that the improved control strategy can reduce the action times of reactive power sub-banks and tap changer while providing a reference for long distance HVDC projects.关键词
背靠背直流输电系统/定熄弧角控制/定电压控制/分接开关控制/弱交流系统Key words
back-to-back DC transmission system/constant extinction angle control/constant voltage control/tap changer control/weak AC system引用本文复制引用
蒋维勇,刘建琴,韩丰,王峤..接入弱交流系统的背靠背直流输电系统控制策略改进[J].电力系统自动化,2016,40(6):71-77,7.
