多端柔性直流输电控制引发的开环模式谐振及其传播  

Open-loop Modal Resonance and Propagation of VSC-MTDC With Different Control

作　　者：付强[1] 杜文娟[1] 王海风[1] FU Qiang;DU Wenjuan;WANG Haifeng(State Key Laboratory of Alternate Electric Power Systems with New Energy Resources（North China Electric Power University）,Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学)

出　　处：《中国电机工程学报》2018年第15期4379-4389,共11页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2016YFB0900602)~~

摘　　要：针对多端交直流混联电力系统,研究不同直流网控制策略引起的开环模式谐振及其传播方向,发现直流电压下垂控制将增加开环模式谐振的发生概率,扩大谐振的传播范围,对交直流混联电力系统的稳定性产生不利影响。该文建立交直流混联电力系统分别在主从控制、下垂控制等不同直流网控制策略下的闭环线性化模型,分析并揭示开环模式谐振的产生机理和传播特性。然后,评估不同控制策略对交直流混联电力系统小干扰稳定性的影响。最后,以CIGRE5端交直流混联电力系统为例,验证上述分析和结论的正确性,提出消除谐振的参数调节方法。Open-loop modal resonance and propagation of multi-terminal voltage source converter based HVDC with different control systems was studied based on multi-terminal AC/DC hybrid power system in this paper. Concluded that when the droop control is used, the possibility of open-loop modal resonance will be improved, and the open-loop modal resonance will be more widespread. Specifically, the closed-loop linearized model of multi-terminal AC/DC hybrid power system with different DC network control strategy such as master-slave control and droop control was established. The mechanism and propagation characteristic of Open-loop modal resonance was analyzed and presented. The impact on small signal stability of AC/DC hybrid power system was evaluated. Finally, the correctness of the above analysis and conclusions were verified by taking the multi terminal AC/DC hybrid power system as an example.

关 键 词：多端柔性直流输电 控制策略 开环模式谐振机理 小干扰稳定性 

分 类 号：TM72[电气工程—电力系统及自动化]