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| Content Provider | IET Digital Library |
|---|---|
| Author | Xie, Bao Zhou, Lin Mao, Mingxuan |
| Abstract | The stability and control performances of grid-connected inverters can be significantly influenced due to the uncertain grid impedance and large grid voltage background harmonics. The system stability and resonance of the grid-connected inverter were investigated separately. Thus, their relationship needs to be identified further. In this study, the equivalent impedance model and the current control model of the grid-connected inverter are established. Based on the three resonance cases: positive incomplete resonance, complete resonance, and negative incomplete resonance, the relationship between the system stability and resonance is identified. Moreover, the principle of harmonic amplification of the grid injected current is analysed thoroughly. It is revealed that the harmonic amplification is always accompanied by low stability of the system, and the centre frequency of harmonic distribution is where the system has the lowest stability. In order to alleviate the harmonics of the grid injected current, it is inevitable to ensure that the system maintains a sufficient phase margin to thwart the grid voltage background harmonics and the inverter output voltage harmonics. Finally, the simulation has been accomplished in MATLAB/SIMULINK software, and the hardware platforms are built with a single phase grid-connected inverter in order to verify the proposed comprehensive analysis further. |
| Starting Page | 1821 |
| Ending Page | 1828 |
| Page Count | 8 |
| ISSN | 17518687 |
| Volume Number | 13 |
| e-ISSN | 17518695 |
| Issue Number | Issue 10, May (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/13/10 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.6499 |
| Journal | IET Generation, Transmission & Distribution |
| Publisher Date | 2019-02-11 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Complete Resonance Control of Electric Power System Current Control Electric Current Control Grid Voltage Background Harmonics Harmonic Amplification Inverter Output Voltage Harmonics Invertors MATLAB/SIMULINK Software Negative Incomplete Resonance Positive Incomplete Resonance Power Grid Power System Control Power System Stability Single Phase Grid-connected Inverter Stability in Control Theory System Stability Uncertain Grid Impedance |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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