文章摘要
谢小荣,刘华坤,贺静波,等.新能源发电并网系统的小信号阻抗/导纳网络建模方法[J].电力系统自动化,2017,41(12):26-32. DOI: 10.7500/AEPS20170125005.
XIE Xiaorong,LIU Huakun,HE Jingbo, et al.Small-signal Impedance/Admittance Network Modeling for Grid-connected Renewable Energy Generation Systems[J].Automation of Electric Power Systems,2017,41(12):26-32. DOI: 10.7500/AEPS20170125005.
新能源发电并网系统的小信号阻抗/导纳网络建模方法
Small-signal Impedance/Admittance Network Modeling for Grid-connected Renewable Energy Generation Systems
DOI:10.7500/AEPS20170125005
关键词: 新能源发电并网系统  阻抗网络模型  小信号建模  功率振荡
KeyWords: grid-connected renewable energy generation system(GREGS)  impedance network model  small-signal modeling  power oscillation
上网日期:2017-05-11
基金项目:国家重点研发计划资助项目(2016YFB0900104);国家电网公司科技项目(SGXJ0000KXJS1500669)
作者单位E-mail
谢小荣 清华大学电机工程与应用电子技术系, 北京市 100084  
刘华坤 清华大学电机工程与应用电子技术系, 北京市 100084 lhk13@mails.tsinghua.edu.cn 
贺静波 国家电力调度控制中心, 北京市 100031  
刘威 清华大学电机工程与应用电子技术系, 北京市 100084  
摘要:
      变流器与交直流电网之间相互作用引发的功率振荡是新能源发电并网系统面临的重要稳定性问题。小信号建模是分析这一问题的基础,但变流器数量巨大、结构各异及其控制系统“黑(灰)箱化”,导致常规的建模方法面临困难。为此,文中提出新能源发电并网系统的小信号阻抗(导纳)网络建模方法,通过将系统部件建模为可反映其内在动态的外特性频域阻抗(导纳)模型,并根据电网拓扑互联起来形成阻抗(导纳)网络,获得目标系统的整体模型,进而通过阻抗聚合量化分析系统的振荡特性。采用河北沽源风电场—串补输电系统次同步振荡问题的建模与分析来说明方法的有效性。
Abstract:
      The power oscillation induced by the interactions between power converters and AC/DC power grids is an important stability problem faced by grid-connected renewable energy generation systems(GREGSs). Small-signal modeling is the basis for the analysis of such a problem. But the large quantities of converters with different structures, parameters and “black(grey)-box” control systems make it very difficult for the conventional method to handle the issue of system modeling. A methodology of small-signal impedance(admittance)network modeling is proposed to address the issue. With each component represented with an impedance or admittance model, a GREGS as a whole can be modeled as the network of impedance or admittance by interconnecting all the individual impedances(admittances)according to the topology of the grid. Such an impedance(admittance)network model can be further aggregated into a lumped impedance(admittance), with which the features of the oscillation could be quantified given the frequency-dependent characteristics of the lumped impedance(admittance). Case studies on the Guyuan series-compensated wind power system have verified the effectiveness of the proposed modeling method. This work is supported by National Key Research and Development Program of China(No. 2016YFB0900104)and State Grid Corporation of China(No. SGXJ0000KXJS1500669).
查看全文(Free!)   查看附录  查看附录  查看附录   查看/发表评论  下载PDF阅读器