多端柔性直流输电系统中电流型潮流控制器引发的模式谐振现象及其对稳定性的影响  

Impact of Model Resonance Caused by Current Flow Control of VSC-MTDC on the Stability of System

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》2019年第17期4995-5004,共10页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2016YFB0900602);国家电网公司科技项目(52094017000W)~~

摘　　要：针对含电流型潮流控制器的多端柔性直流输电系统,该文分别建立主从控制下多端柔性直流系统和电流型潮流控制器的线性化传递模型,阐述二者能够引起模式谐振的模型特征。然后,对比分析2种主要谐振现象(闭环模式谐振和开环模式谐振)的产生条件和判定依据,论证其对系统稳定性的不利影响,可知开环模式谐振和闭环模式谐振是对同一现象的不同数学描述,且开环模式谐振点对系统稳定性的危害要大于闭环模式谐振点。最后,在Matlab软件平台中搭建含电流型潮流控制器的多端直流系统,得出直流系统控制系统与电流型潮流控制器间,以及多个电流型潮流控制器间均会发生模式谐振现象,验证了理论分析的正确性,并刻画了模式谐振对控制器参数稳定域的影响,可为实际工程的参数整定提供借鉴。In this paper,the impact of model resonance caused by current flow control on the stability of VSC-MTDC system was studied.The linearized model of VSC-MTDC and current flow control(CFC)were established respectively.Based on the linearized model,the characteristics of two model resonances,open-loop resonance and closed-loop resonance,were analyzed and compared.It is concluded that these model resonances are differently mathematical description of the same phenomenon.They can both reduce the damping of the oscillation modes.In addition,the impact of open-loop model resonance on the stability was more significant than the closed-loop model resonance.Hence,the parameters should be carefully tuned to avoid the model resonances.Finally,the voltage source converter based HVDC(VSC-MTDC)system with CFC was established in Matlab.The simulation results indicate that the model resonances can occur between VSC-MTDC and CFC or CFCs.The stable parameters area of CFC is calculated,which can be referred by engineering.

关 键 词：电流型潮流控制器 多端柔性直流输电系统 模式谐振 系统稳定性 

分 类 号：TM721[电气工程—电力系统及自动化]