A Novel Digital Control Method of a Single-Phase Grid-Connected Inverter Based on a Virtual Closed-Loop Circuit and Complex Vector Representation
Abstract
:1. Introduction
2. Virtual Closed-Loop Construction
3. Discrete Model of the Inverter Considering the Influence of Delay Based on Complex Vectors
4. Complex Vector-Based Controller
4.1. Discrete Model of the Complex Vector-Based Inverter
4.2. Controller Design
5. Experimental Results
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
Vdc | DC-link voltage |
L | Grid-tie inductor |
r | Resistance of the inductor |
i | Gird-connected current |
vis | Port voltage of the inverter |
vgs | Grid voltage of the AC side |
im | Virtual gird-connected current |
vim | Port voltage of the inverter in the virtual closed-loop circuit |
vgm | Virtual grid voltage of the AC side |
The setting value of the inductance | |
ω | Angular frequency of the grid voltage |
Ts | Sampling period |
G(s) | The transfer function of the controlled plant |
C(s) | The transfer function of the controller |
H(s) | The transfer function of the whole system |
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Parameter | Variable | Value |
Grid Voltage | vg | 110 V |
Grid Frequency | f0 | 50 Hz |
Grid-Tie Inductor | L | 13.6 mH |
Resistance of the inductor | r | 0.6 Ω |
Switching Frequency | fs | 12 kHz |
DC-Link Voltage | Vdc | 200 V |
Components | Part Number | |
IGBTs(S1–S4) | IKW40T120 | |
Digital Signal Controller | TMS320F28335 | |
DC power supply | PSI81500-30 | |
Current Probe | CP150 | |
Oscilloscope | HDO4054 |
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Xie, K.; Hu, G.; Yi, H.; Lyu, Z.; Xiang, Y. A Novel Digital Control Method of a Single-Phase Grid-Connected Inverter Based on a Virtual Closed-Loop Circuit and Complex Vector Representation. Energies 2017, 10, 2068. https://doi.org/10.3390/en10122068
Xie K, Hu G, Yi H, Lyu Z, Xiang Y. A Novel Digital Control Method of a Single-Phase Grid-Connected Inverter Based on a Virtual Closed-Loop Circuit and Complex Vector Representation. Energies. 2017; 10(12):2068. https://doi.org/10.3390/en10122068
Chicago/Turabian StyleXie, Kun, Gangyi Hu, Hong Yi, Zhibi Lyu, and Yangxiao Xiang. 2017. "A Novel Digital Control Method of a Single-Phase Grid-Connected Inverter Based on a Virtual Closed-Loop Circuit and Complex Vector Representation" Energies 10, no. 12: 2068. https://doi.org/10.3390/en10122068
APA StyleXie, K., Hu, G., Yi, H., Lyu, Z., & Xiang, Y. (2017). A Novel Digital Control Method of a Single-Phase Grid-Connected Inverter Based on a Virtual Closed-Loop Circuit and Complex Vector Representation. Energies, 10(12), 2068. https://doi.org/10.3390/en10122068