电力系统自动化2017，Vol.41Issue(12)：26-32,7.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
摘要
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.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Key words
grid-connected renewable energy generation system (GREGS)/impedance network model/small-signal modeling/power oscillation引用本文复制引用
谢小荣,刘华坤,贺静波,刘威..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):26-32,7.基金项目
国家重点研发计划资助项目(2016YFB0900104) （2016YFB0900104）
国家电网公司科技项目(SGXJ0000KXJS1500669).This work is supported by National Key Research and Development Program of China (No.2016YFB0900104) and State Grid Corporation of China (No.SGXJ0000KXJS1500669). （SGXJ0000KXJS1500669）
