Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions
Frequency stability; Reactive power; Restoration; Software testing; Transient analysis; Voltage control; DigSILENT power factories; Fast transient response; Hierarchical control; Islanded mode; Micro grid; Nonlinear load; Reactive power compensator; Total harmonic distortion (THD); Electric power sy...
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ISA - Instrumentation, Systems, and Automation Society
2023
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my.uniten.dspace-243422023-05-29T15:22:53Z Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions Naderipour A. Abdul-Malek Z. Ramachandaramurthy V.K. Kalam A. Miveh M.R. 36677578000 57195728805 6602912020 55543249600 55321573900 Frequency stability; Reactive power; Restoration; Software testing; Transient analysis; Voltage control; DigSILENT power factories; Fast transient response; Hierarchical control; Islanded mode; Micro grid; Nonlinear load; Reactive power compensator; Total harmonic distortion (THD); Electric power system control This paper proposes an improved hierarchical control strategy consists of a primary and a secondary layer for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions. The primary layer is comprised of a multi-loop control strategy to provide balanced output voltages, a harmonic compensator to reduce the total harmonic distortion (THD), and a droop-based scheme to achieve an accurate power sharing. At the secondary control layer, a reactive power compensator and a frequency restoration loop are designed to improve the accuracy of reactive power sharing and to restore the frequency deviation, respectively. Simulation studies and practical performance are carried out using the DIgSILENT Power Factory software and laboratory testing, to verify the effectiveness of the control strategy in both islanded and grid-connected mode. Zero reactive power sharing error and zero frequency steady-state error have given this control strategy an edge over the conventional control scheme. Furthermore, the proposed scheme presented outstanding voltage control performance, such as fast transient response and low voltage THD. The superiority of the proposed control strategy over the conventional filter-based control scheme is confirmed by the 2 line cycles decrease in the transient response. Additionally, the voltage THDs in islanded mode are reduced from above 5.1% to lower than 2.7% with the proposed control strategy under nonlinear load conditions. The current THD is also reduced from above 21% to lower than 2.4% in the connection point of the microgrid with the offered control scheme in the grid-connected mode. � 2019 ISA Final 2023-05-29T07:22:53Z 2023-05-29T07:22:53Z 2019 Article 10.1016/j.isatra.2019.04.025 2-s2.0-85065191294 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85065191294&doi=10.1016%2fj.isatra.2019.04.025&partnerID=40&md5=b5e70a113224f3c4a6de59fa45a8f926 https://irepository.uniten.edu.my/handle/123456789/24342 94 352 369 ISA - Instrumentation, Systems, and Automation Society Scopus |
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| description |
Frequency stability; Reactive power; Restoration; Software testing; Transient analysis; Voltage control; DigSILENT power factories; Fast transient response; Hierarchical control; Islanded mode; Micro grid; Nonlinear load; Reactive power compensator; Total harmonic distortion (THD); Electric power system control |
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36677578000 |
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36677578000 Naderipour A. Abdul-Malek Z. Ramachandaramurthy V.K. Kalam A. Miveh M.R. |
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Article |
| author |
Naderipour A. Abdul-Malek Z. Ramachandaramurthy V.K. Kalam A. Miveh M.R. |
| spellingShingle |
Naderipour A. Abdul-Malek Z. Ramachandaramurthy V.K. Kalam A. Miveh M.R. Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| author_sort |
Naderipour A. |
| title |
Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| title_short |
Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| title_full |
Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| title_fullStr |
Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| title_full_unstemmed |
Hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| title_sort |
hierarchical control strategy for a three-phase 4-wire microgrid under unbalanced and nonlinear load conditions |
| publisher |
ISA - Instrumentation, Systems, and Automation Society |
| publishDate |
2023 |
| _version_ |
1806426499442540544 |