Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids
In the islanded microgrids, distributed energy sources are responsible for power-sharing, and accurate power-sharing is essential among these microgrids. Due to the mismatch of the physical impedance of power lines, poor reactive power-sharing is observed. Therefore, in this paper, the use of virtua...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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University of Isfahan
2023-04-01
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| Series: | هوش محاسباتی در مهندسی برق |
| Subjects: | |
| Online Access: | https://isee.ui.ac.ir/article_27048_90258f818d814ae5be3be607b3fa5b5e.pdf |
| _version_ | 1797672445522477056 |
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| author | Monir Ashrafi Mehdi Banjaad Ali Akbarzadeh Kalat Ali Dastfan |
| author_facet | Monir Ashrafi Mehdi Banjaad Ali Akbarzadeh Kalat Ali Dastfan |
| author_sort | Monir Ashrafi |
| collection | DOAJ |
| description | In the islanded microgrids, distributed energy sources are responsible for power-sharing, and accurate power-sharing is essential among these microgrids. Due to the mismatch of the physical impedance of power lines, poor reactive power-sharing is observed. Therefore, in this paper, the use of virtual impedance in the form of two methods of virtual positive impedance and virtual negative impedance is proposed to improve the accuracy of reactive power-sharing in a conventional droop controlled islanded microgrid. In this paper, in addition to presenting a controller to properly adjust the virtual impedance, the concept of virtual negative impedance is used to correct the effective impedance of the power supply line and improve the common bus voltage, and increase the output power of energy sources. To evaluate the proposed control methods, a test islanded microgrid is simulated in PSCAD/EMTDC software. The results show that both proposed methods have a good effect on the proper reactive power-sharing in the microgrid. In addition, the results show that the virtual negative impedance method can improve the common bus voltage and increase the output power of the source by reducing the effective line impedance. |
| first_indexed | 2024-03-11T21:30:10Z |
| format | Article |
| id | doaj.art-b9a3278b1cd6413c840497c696f36d64 |
| institution | Directory Open Access Journal |
| issn | 2821-0689 |
| language | English |
| last_indexed | 2024-03-11T21:30:10Z |
| publishDate | 2023-04-01 |
| publisher | University of Isfahan |
| record_format | Article |
| series | هوش محاسباتی در مهندسی برق |
| spelling | doaj.art-b9a3278b1cd6413c840497c696f36d642023-09-27T11:03:52ZengUniversity of Isfahanهوش محاسباتی در مهندسی برق2821-06892023-04-0114111610.22108/isee.2022.131929.153127048Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded MicrogridsMonir Ashrafi0Mehdi Banjaad1Ali Akbarzadeh Kalat2Ali Dastfan3Faculty of Electrical Engineerig, Shahrood University of Technology, Shahrood, IranFaculty of Electrical Engineerig, Shahrood University of Technology, Shahrood, IranFaculty of Electrical Engineerig, Shahrood University of Technology, Shahrood, IranFaculty of Electrical Engineerig, Shahrood University of Technology, Shahrood, IranIn the islanded microgrids, distributed energy sources are responsible for power-sharing, and accurate power-sharing is essential among these microgrids. Due to the mismatch of the physical impedance of power lines, poor reactive power-sharing is observed. Therefore, in this paper, the use of virtual impedance in the form of two methods of virtual positive impedance and virtual negative impedance is proposed to improve the accuracy of reactive power-sharing in a conventional droop controlled islanded microgrid. In this paper, in addition to presenting a controller to properly adjust the virtual impedance, the concept of virtual negative impedance is used to correct the effective impedance of the power supply line and improve the common bus voltage, and increase the output power of energy sources. To evaluate the proposed control methods, a test islanded microgrid is simulated in PSCAD/EMTDC software. The results show that both proposed methods have a good effect on the proper reactive power-sharing in the microgrid. In addition, the results show that the virtual negative impedance method can improve the common bus voltage and increase the output power of the source by reducing the effective line impedance.https://isee.ui.ac.ir/article_27048_90258f818d814ae5be3be607b3fa5b5e.pdfnegative virtual impedancepositive virtual impedanceinverterreactive power sharingislanded microgrids |
| spellingShingle | Monir Ashrafi Mehdi Banjaad Ali Akbarzadeh Kalat Ali Dastfan Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids هوش محاسباتی در مهندسی برق negative virtual impedance positive virtual impedance inverter reactive power sharing islanded microgrids |
| title | Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids |
| title_full | Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids |
| title_fullStr | Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids |
| title_full_unstemmed | Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids |
| title_short | Accurate Reactive Power-Sharing Using Modified Droop Method Based on Virtual Impedance Control in the Islanded Microgrids |
| title_sort | accurate reactive power sharing using modified droop method based on virtual impedance control in the islanded microgrids |
| topic | negative virtual impedance positive virtual impedance inverter reactive power sharing islanded microgrids |
| url | https://isee.ui.ac.ir/article_27048_90258f818d814ae5be3be607b3fa5b5e.pdf |
| work_keys_str_mv | AT monirashrafi accuratereactivepowersharingusingmodifieddroopmethodbasedonvirtualimpedancecontrolintheislandedmicrogrids AT mehdibanjaad accuratereactivepowersharingusingmodifieddroopmethodbasedonvirtualimpedancecontrolintheislandedmicrogrids AT aliakbarzadehkalat accuratereactivepowersharingusingmodifieddroopmethodbasedonvirtualimpedancecontrolintheislandedmicrogrids AT alidastfan accuratereactivepowersharingusingmodifieddroopmethodbasedonvirtualimpedancecontrolintheislandedmicrogrids |