构网型柔性直流输电系统附加阻尼控制器设计  

Design of Ancillary Damping Controller of Grid-Forming VSC-HVDC Systems

作　　者：王灿林 章德 朱思睿 李勇[3] 王炜宇 文汀 WANG Canlin;ZHANG De;ZHU Sirui;LI Yong;WANG Weiyu;WEN Ding(State Grid Hunan Electric Power Company Limited,Changsha 410004,China;Hunan Key Laboratory of Energy Internet Supply-Demand and Operation,Changsha 410007,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]国网湖南省电力有限公司,湖南长沙410004 [2]能源互联网供需运营湖南省重点实验室,湖南长沙410007 [3]湖南大学电气与信息工程学院,湖南长沙410082 [4]长沙理工大学电气与信息工程学院,湖南长沙410114

出　　处：《湖南电力》2024年第2期68-76,共9页Hunan Electric Power

基　　金：2023年度湖南省科技创新领军人才项目(2023RC1038);国网湖南省电力有限公司科技项目(5216A2220011);湖南省科技创新平台与人才计划项目(2019TP1053)。

摘　　要：构网型柔性直流输电系统对受端弱电网有较好的惯性支撑作用,但是也呈现出类似同步发电机的振荡特性,使系统的动态特性更为复杂。针对该问题,构建构网型柔性直流输电系统与受端电网的状态空间模型和传递函数模型,揭示构网型柔性直流输电系统在电网扰动下的振荡特性,并设计一种构网型柔直系统的附加阻尼控制器,该控制器仅利用构网型柔性直流输电系统自身的状态量即可对交直流混联系统的关键振荡模态进行阻尼。在DIgSILENT/PowerFactory中搭建仿真测试系统,对所提控制策略进行测试,结果表明所提出的附加阻尼控制器能够有效提升系统对直流电压振荡和交流侧机电振荡的抑制效果。Voltage source converter based high voltage direct current system can provide inertia support to the receiving-end power systems.However,it also inherits the oscillatory characteristics of synchronous generator,which makes the system dynamics more complex.This paper establishes the state-space model and transfer function models of a grid-forming VSC-HVDC system connected with a receiving-end power system,which are utilized to reveal the system oscillatory characteristics under the disturbance.Ancillary damping controllers are designed to improve the damping performance of the grid-forming VSC-HVDC systems,which only requires the state variables of the grid-forming VSC-HVDC systems.The test system is built in DIgSILENT/PowerFactory to verify the performance of the proposed control strategy.The results show that the proposed control strategy can effectively dampen the dc voltage oscillation and the electromechanical oscillations in AC grids.

关 键 词：柔性直流输电系统 构网型控制 振荡特性 附加阻尼控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]