Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System
Appropriate power quality is indispensable for electrical distribution networks, especially in microgrids including renewable energy sources. One of the critical issues affecting power quality is the unbalanced voltage. Voltage imbalance in microgrids spreads due to proximity of loads and power sour...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Amirkabir University of Technology
2022-12-01
|
| Series: | AUT Journal of Electrical Engineering |
| Subjects: | |
| Online Access: | https://eej.aut.ac.ir/article_4858_446246459e797af3c2559c05aa53b617.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849434080842612736 |
|---|---|
| author | Alireza Mohammadi Shahram Karimi Hassan Moradi Cheshmehbeigi |
| author_facet | Alireza Mohammadi Shahram Karimi Hassan Moradi Cheshmehbeigi |
| author_sort | Alireza Mohammadi |
| collection | DOAJ |
| description | Appropriate power quality is indispensable for electrical distribution networks, especially in microgrids including renewable energy sources. One of the critical issues affecting power quality is the unbalanced voltage. Voltage imbalance in microgrids spreads due to proximity of loads and power sources, causing instability, and eventually interruption. In general, unbalanced voltage can be compensated by using reactive power compensators, e.g. series active power filter and dynamic voltage restorer. However, these equipment imposes additional costs, which is not economically viable. Recently, the surplus capacity of inverter-interfaced Distributed Generations is used to improve voltage quality. In this regard, the control methods based on Proportional-Resonance controllers in αβ frame or PI controllers in a Dual-frame Synchronous Reference Frame (DSRF) are the usual methods that are used. The problem of limiting the output current in αβ frame and the problem of oscillating components in DSRF are the weakness of these methods. To resolve the mentioned drawbacks, a control method based on Decoupled Double Synchronous Reference Frame (DDSRF) is proposed in this paper for unbalanced voltage compensation, using a two-stage grid-connected Photovoltaic system. The simulation results show that despite the dynamic changes and the alternating nature of the Photovoltaic system in power generation, the proposed control system appropriately compensates the unbalanced voltage, and controls the DC link voltage and the Photovoltaic output power. After compensation using the proposed control strategy, the Voltage Unbalance Factor (VUF) and the Total Harmonic Distortion (THD) at the PCC are under the permissible range accounting for two percent and five percent, respectively. |
| format | Article |
| id | doaj-art-b8cea9fd5373472aa3a8f71d473316da |
| institution | Kabale University |
| issn | 2588-2910 2588-2929 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Amirkabir University of Technology |
| record_format | Article |
| series | AUT Journal of Electrical Engineering |
| spelling | doaj-art-b8cea9fd5373472aa3a8f71d473316da2025-08-20T03:26:48ZengAmirkabir University of TechnologyAUT Journal of Electrical Engineering2588-29102588-29292022-12-0154229531210.22060/eej.2022.21387.54724858Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic SystemAlireza Mohammadi0Shahram Karimi1Hassan Moradi Cheshmehbeigi2Department of Electrical Engineering, Razi University, Kermanshah, IranElectrical Engineering Department, Razi University, Kermanshah, IranDepartment of Electrical Engineering, Razi University, Kermanshah, IranAppropriate power quality is indispensable for electrical distribution networks, especially in microgrids including renewable energy sources. One of the critical issues affecting power quality is the unbalanced voltage. Voltage imbalance in microgrids spreads due to proximity of loads and power sources, causing instability, and eventually interruption. In general, unbalanced voltage can be compensated by using reactive power compensators, e.g. series active power filter and dynamic voltage restorer. However, these equipment imposes additional costs, which is not economically viable. Recently, the surplus capacity of inverter-interfaced Distributed Generations is used to improve voltage quality. In this regard, the control methods based on Proportional-Resonance controllers in αβ frame or PI controllers in a Dual-frame Synchronous Reference Frame (DSRF) are the usual methods that are used. The problem of limiting the output current in αβ frame and the problem of oscillating components in DSRF are the weakness of these methods. To resolve the mentioned drawbacks, a control method based on Decoupled Double Synchronous Reference Frame (DDSRF) is proposed in this paper for unbalanced voltage compensation, using a two-stage grid-connected Photovoltaic system. The simulation results show that despite the dynamic changes and the alternating nature of the Photovoltaic system in power generation, the proposed control system appropriately compensates the unbalanced voltage, and controls the DC link voltage and the Photovoltaic output power. After compensation using the proposed control strategy, the Voltage Unbalance Factor (VUF) and the Total Harmonic Distortion (THD) at the PCC are under the permissible range accounting for two percent and five percent, respectively.https://eej.aut.ac.ir/article_4858_446246459e797af3c2559c05aa53b617.pdfgrid-connected photovoltaic systemdecoupled double synchronous reference frameunbalanced voltage compensationvoltage unbalance factor |
| spellingShingle | Alireza Mohammadi Shahram Karimi Hassan Moradi Cheshmehbeigi Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System AUT Journal of Electrical Engineering grid-connected photovoltaic system decoupled double synchronous reference frame unbalanced voltage compensation voltage unbalance factor |
| title | Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System |
| title_full | Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System |
| title_fullStr | Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System |
| title_full_unstemmed | Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System |
| title_short | Unbalanced Voltage Compensation Using Grid-Connected Photovoltaic System |
| title_sort | unbalanced voltage compensation using grid connected photovoltaic system |
| topic | grid-connected photovoltaic system decoupled double synchronous reference frame unbalanced voltage compensation voltage unbalance factor |
| url | https://eej.aut.ac.ir/article_4858_446246459e797af3c2559c05aa53b617.pdf |
| work_keys_str_mv | AT alirezamohammadi unbalancedvoltagecompensationusinggridconnectedphotovoltaicsystem AT shahramkarimi unbalancedvoltagecompensationusinggridconnectedphotovoltaicsystem AT hassanmoradicheshmehbeigi unbalancedvoltagecompensationusinggridconnectedphotovoltaicsystem |