Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors
Abstract The harmonic problems caused by non‐linear factors of the grid connected inverter (GCI) system are more complicated, including both non‐characteristic harmonics emitted by the dead‐time and the changes in harmonic impedance characteristics. Harmonics interact with the changing impedance, an...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-11-01
|
| Series: | IET Renewable Power Generation |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/rpg2.13147 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846164173362298880 |
|---|---|
| author | Jianwen Li Shanshan Song Rong Li Wei Sun |
| author_facet | Jianwen Li Shanshan Song Rong Li Wei Sun |
| author_sort | Jianwen Li |
| collection | DOAJ |
| description | Abstract The harmonic problems caused by non‐linear factors of the grid connected inverter (GCI) system are more complicated, including both non‐characteristic harmonics emitted by the dead‐time and the changes in harmonic impedance characteristics. Harmonics interact with the changing impedance, and even cause harmonic amplification and resonance. The harmonic deterioration of the multiple GCIs system is serious. To analyse the mechanism and way of harmonic deterioration in grid‐connected system caused by nonlinear factors, the active impedance models of single inverter and multiple GCIs system including dead‐time effect and digital control delay are established first. In view of this, the influence mechanism of non‐linear factors on system stability is explored. The improved modal analysis method is used to traverse the network series parallel resonance caused by nonlinear factors. The results show that both the dead‐time effect and digital control delay reduce phase margin of the system, resulting in the resonant frequency shift and the resonant peak increase. When the harmonic excitation source interacts with the complex network under the influence of nonlinear factors, it will lead to further deterioration of harmonics. Finally, based on the MATLAB and RT‐LAB hardware‐in‐the‐loop simulation platforms, a multiple GCIs system model is built to verify the correctness of the established active impedance model and harmonic deterioration analysis. |
| format | Article |
| id | doaj-art-422a9958e19c4c9a82cbe2e4ff62f35a |
| institution | Kabale University |
| issn | 1752-1416 1752-1424 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Renewable Power Generation |
| spelling | doaj-art-422a9958e19c4c9a82cbe2e4ff62f35a2024-11-18T14:18:26ZengWileyIET Renewable Power Generation1752-14161752-14242024-11-0118153429344210.1049/rpg2.13147Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factorsJianwen Li0Shanshan Song1Rong Li2Wei Sun3State Key Laboratory of New Energy Power System North China Electric Power University Baoding Hebei ChinaZhumadian Power Supply Company State Grid Henan Electric Power Company Zhumadian City Henan Province ChinaState Key Laboratory of New Energy Power System North China Electric Power University Baoding Hebei ChinaBaoding Power Supply Branch State Grid Hebei Province Electric power Co., Ltd. Baoding Hebei People's Republic of ChinaAbstract The harmonic problems caused by non‐linear factors of the grid connected inverter (GCI) system are more complicated, including both non‐characteristic harmonics emitted by the dead‐time and the changes in harmonic impedance characteristics. Harmonics interact with the changing impedance, and even cause harmonic amplification and resonance. The harmonic deterioration of the multiple GCIs system is serious. To analyse the mechanism and way of harmonic deterioration in grid‐connected system caused by nonlinear factors, the active impedance models of single inverter and multiple GCIs system including dead‐time effect and digital control delay are established first. In view of this, the influence mechanism of non‐linear factors on system stability is explored. The improved modal analysis method is used to traverse the network series parallel resonance caused by nonlinear factors. The results show that both the dead‐time effect and digital control delay reduce phase margin of the system, resulting in the resonant frequency shift and the resonant peak increase. When the harmonic excitation source interacts with the complex network under the influence of nonlinear factors, it will lead to further deterioration of harmonics. Finally, based on the MATLAB and RT‐LAB hardware‐in‐the‐loop simulation platforms, a multiple GCIs system model is built to verify the correctness of the established active impedance model and harmonic deterioration analysis.https://doi.org/10.1049/rpg2.13147circuit resonanceharmonic distortionpower system harmonics |
| spellingShingle | Jianwen Li Shanshan Song Rong Li Wei Sun Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors IET Renewable Power Generation circuit resonance harmonic distortion power system harmonics |
| title | Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors |
| title_full | Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors |
| title_fullStr | Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors |
| title_full_unstemmed | Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors |
| title_short | Analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors |
| title_sort | analysis of active impedance characteristics and harmonic deterioration of multiple grid connected inverters considering nonlinear factors |
| topic | circuit resonance harmonic distortion power system harmonics |
| url | https://doi.org/10.1049/rpg2.13147 |
| work_keys_str_mv | AT jianwenli analysisofactiveimpedancecharacteristicsandharmonicdeteriorationofmultiplegridconnectedinvertersconsideringnonlinearfactors AT shanshansong analysisofactiveimpedancecharacteristicsandharmonicdeteriorationofmultiplegridconnectedinvertersconsideringnonlinearfactors AT rongli analysisofactiveimpedancecharacteristicsandharmonicdeteriorationofmultiplegridconnectedinvertersconsideringnonlinearfactors AT weisun analysisofactiveimpedancecharacteristicsandharmonicdeteriorationofmultiplegridconnectedinvertersconsideringnonlinearfactors |