DocumentCode :
676666
Title :
An improved synchronverter model and its dynamic behaviour comparison with synchronous generator
Author :
Chang-hua Zhang ; Qing-Chang Zhong ; Jin-Song Meng ; Xin Chen ; Qi Huang ; Shu-Heng Chen ; Zhi-peng Lv
Author_Institution :
Sch. of Energy Sci. & Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
fYear :
2013
fDate :
9-11 Sept. 2013
Firstpage :
1
Lastpage :
4
Abstract :
As widely-used energy transform device, inverter plays important role in microgrids and distribution generation (DG). Generally, according to its control object, inverter´s controllers can be classified into at least three kinds: constant PQ, droop control and synchronverter (SV) or virtual synchronous generator (VSG). In this paper, an improved synchronverter model is presented. By means of powerful computation ability of digital signal processor (DSP), all basic parts of SG, are reconstructed though program code running in DSP and thus become virtual parts of SV. In this way, SV has absolutely similar structure with actual SG. This similarity ensures they always have really same dynamic behaviour. When stability of multi-SVs-dominated microgrids investigated, inverter model can be replaced by SG model without any accuracy losses. At the same time, this replacement provides a possibility to transfer high matured stability theories which are already applied for large power grid into stability analysis of microgrids or DG. Detailed design methods for SV controller are presented. Via Simulink, dynamic responses of SV and SG are compared under different operation situations. Results prove that SV has same response with similar parameter SG not only in steady state but also in whole process.
Keywords :
control system synthesis; distributed power generation; invertors; stability; synchronous generators; DSP; SG model; SV; SV controller design method; digital signal processor; dynamic behaviour comparison; improved synchronverter model; inverter model; microgrid stability analysis; synchronous generator; Inverter; microgrid; synchronous generator; synchronverter; virtual synchronous generator (VSG);
fLanguage :
English
Publisher :
iet
Conference_Titel :
Renewable Power Generation Conference (RPG 2013), 2nd IET
Conference_Location :
Beijing
Electronic_ISBN :
978-1-84919-758-8
Type :
conf
DOI :
10.1049/cp.2013.1879
Filename :
6718790
Link To Document :
بازگشت