An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System
This paper proposes an enhanced control strategy for mitigating state-transition oscillations in active and reactive power responses of self-synchronized converter system to secure the islanded power system stability. The self-synchronized converter is well known for “grid-forming” that is able to o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/24/8453 |
| _version_ | 1797505058637611008 |
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| author | Ki Ryong Kim Sangjung Lee Jong-Pil Lee Jaesik Kang |
| author_facet | Ki Ryong Kim Sangjung Lee Jong-Pil Lee Jaesik Kang |
| author_sort | Ki Ryong Kim |
| collection | DOAJ |
| description | This paper proposes an enhanced control strategy for mitigating state-transition oscillations in active and reactive power responses of self-synchronized converter system to secure the islanded power system stability. The self-synchronized converter is well known for “grid-forming” that is able to operate to stand-alone mode (SAM) providing grid voltage and frequency without phase synchronization units. Although the grid-forming (GFM) is self-synchronized, the inherent synchronization principle causes system degradation in which should maintain a point of common coupling (PCC) voltage for critical loads as well as transitions from grid-connected mode (GCM) to SAM and vice versa. Therefore, this paper focuses on resolving the inherent oscillatory issues in GFM self-synchronized converter system (especially adopted ‘synchronverter’ principle), and proposes a control strategy for controllability improvement based on stability analysis for smooth state-transition under islanded power system. The efficacy of the proposed control method is verified through a high-fidelity electromagnetic transient (EMT) simulation with case studies on 30kW synchronverter system and further experimental hardware-in-loop system (HILS) test with Opal-RT (OP-5707) platform. |
| first_indexed | 2024-03-10T04:13:15Z |
| format | Article |
| id | doaj.art-a4ae1008bbc44be2a81c88b7daa5e31c |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T04:13:15Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a4ae1008bbc44be2a81c88b7daa5e31c2023-11-23T08:07:30ZengMDPI AGEnergies1996-10732021-12-011424845310.3390/en14248453An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power SystemKi Ryong Kim0Sangjung Lee1Jong-Pil Lee2Jaesik Kang3Power Conversion System Research Center, Smart Grid Research Division, Korea Electrotechnology Research Institute, Gwangju 61751, KoreaPower Conversion System Research Center, Smart Grid Research Division, Korea Electrotechnology Research Institute, Gwangju 61751, KoreaPower Conversion System Research Center, Smart Grid Research Division, Korea Electrotechnology Research Institute, Gwangju 61751, KoreaPower Conversion System Research Center, Smart Grid Research Division, Korea Electrotechnology Research Institute, Gwangju 61751, KoreaThis paper proposes an enhanced control strategy for mitigating state-transition oscillations in active and reactive power responses of self-synchronized converter system to secure the islanded power system stability. The self-synchronized converter is well known for “grid-forming” that is able to operate to stand-alone mode (SAM) providing grid voltage and frequency without phase synchronization units. Although the grid-forming (GFM) is self-synchronized, the inherent synchronization principle causes system degradation in which should maintain a point of common coupling (PCC) voltage for critical loads as well as transitions from grid-connected mode (GCM) to SAM and vice versa. Therefore, this paper focuses on resolving the inherent oscillatory issues in GFM self-synchronized converter system (especially adopted ‘synchronverter’ principle), and proposes a control strategy for controllability improvement based on stability analysis for smooth state-transition under islanded power system. The efficacy of the proposed control method is verified through a high-fidelity electromagnetic transient (EMT) simulation with case studies on 30kW synchronverter system and further experimental hardware-in-loop system (HILS) test with Opal-RT (OP-5707) platform.https://www.mdpi.com/1996-1073/14/24/8453self-synchronized convertersynchronvertergrid-forming converter |
| spellingShingle | Ki Ryong Kim Sangjung Lee Jong-Pil Lee Jaesik Kang An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System Energies self-synchronized converter synchronverter grid-forming converter |
| title | An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System |
| title_full | An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System |
| title_fullStr | An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System |
| title_full_unstemmed | An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System |
| title_short | An Enhanced Control Strategy for Mitigation of State-Transition Oscillation Phenomena in Grid-Forming Self-Synchronized Converter System with Islanded Power System |
| title_sort | enhanced control strategy for mitigation of state transition oscillation phenomena in grid forming self synchronized converter system with islanded power system |
| topic | self-synchronized converter synchronverter grid-forming converter |
| url | https://www.mdpi.com/1996-1073/14/24/8453 |
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