摘要
2015年底在江苏南京正式投运的中国首台统一潮流控制器(unified power flow controller,UPFC)采用矢量控制策略的模块化多电平换流器。已发表文献中多为关于传统相角控制型UPFC装置交互影响的分析研究,而对矢量控制UPFC与HVDC间的交互影响研究还不够深入。为深入了解UPFC接入对特高压交直流混联电网的影响,文章新建了矢量控制UPFC的非线性数学模型,基于分块化思想构造了包含HVDC系统与矢量控制UPFC的多机全系统开环线性化模型,应用相对增益矩阵(relative gain array,RGA)方法定量分析UPFC控制器、UPFC与HVDC系统间的交互影响强弱,并通过阶跃仿真验证RGA结论的正确性。此外,还通过对发电机功角的非线性仿真以及曲线的Prony分析结果,验证UPFC接入对江苏电网系统低频振荡阻尼特性的影响。
The first UPFCinChina wasputintofull operation in Nanjing, Jiangsu Province at the end of 2015. It adopts modular multilevel converter（MMC） based on vector-controlled strategy.Published literatures focus on UPFC under traditional power-angle control, butnodeep research of interactionsbetweenvector-controlled UPFCand HVDC are carried out. In order to gain deep understanding about interaction on UPFC connecting to Jiangsu UHVAC/DC hybrid power system,inthis paper non-linear dynamic mathematical model of vector-current controlled UPFCwas newly establishedand open-loop linearized model of multiple-machine power system containing UPFC and HVDC was derived based on block segmentation. Based on the derived model, dynamic interactions among multiple controllers of UPFC itself,UPFC controllers and HVDCwere investigatedwithrelative gain array （RGA） method, and its validitywas confirmedwithstep simulation results.Non-linear simulation and its curve analysiswithProny method of generator angle differencewere conducted to examine impact of UPFC installationon damping characteristic of low frequency oscillation in Jiangsupowergrid.
出处
《电网技术》
EI
CSCD
北大核心
2016年第9期2654-2660,共7页
Power System Technology
基金
中央高校基本科研业务费专项资金资助(2016XS09)
国家电网公司科技资助项目(SGJS0000DKJS1501080)
国家自然科学基金资助项目(51277029)~~
