Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid
For an islanded micro-grid with a high penetration of photovoltaic (PV) power generators, the low inertia reserve and the maximum peak power tracking control may increase the difficulty of maintaining the system’s supply⁻demand balance, and cause frequency instability, especially...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-11-01
|
| Series: | Electronics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-9292/7/11/340 |
| _version_ | 1798040846209122304 |
|---|---|
| author | Xin Huang Keyou Wang Guojie Li Hua Zhang |
| author_facet | Xin Huang Keyou Wang Guojie Li Hua Zhang |
| author_sort | Xin Huang |
| collection | DOAJ |
| description | For an islanded micro-grid with a high penetration of photovoltaic (PV) power generators, the low inertia reserve and the maximum peak power tracking control may increase the difficulty of maintaining the system’s supply⁻demand balance, and cause frequency instability, especially when the available generation is excessive. This will require changes in the way the PV inverter is controlled. In this paper, a virtual inertia frequency control (VIFC) strategy is proposed to let the two-stage PV inverters emulate inertia and support the system frequency with a timely response (e.g., inertia response), and the required power for inertia emulation is obtained from both the DC-link capacitor and the PV reserved energy. As the rate of the system frequency change can be reduced with the inertia increase, the proposed method can mitigate the frequency contingency event before the superior-level coordination control is enabled for the frequency restoration. The simulation results demonstrate the effectiveness of the proposed method. |
| first_indexed | 2024-04-11T22:13:18Z |
| format | Article |
| id | doaj.art-0a200d2eb83f43ae94dd7828edef905d |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-04-11T22:13:18Z |
| publishDate | 2018-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-0a200d2eb83f43ae94dd7828edef905d2022-12-22T04:00:30ZengMDPI AGElectronics2079-92922018-11-0171134010.3390/electronics7110340electronics7110340Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-GridXin Huang0Keyou Wang1Guojie Li2Hua Zhang3Key Laboratory of Control of Power Transmission and Transformation, Ministry of Education, Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Control of Power Transmission and Transformation, Ministry of Education, Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaKey Laboratory of Control of Power Transmission and Transformation, Ministry of Education, Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSichuan Electrical Power Research Institute, Chengdu 610000, ChinaFor an islanded micro-grid with a high penetration of photovoltaic (PV) power generators, the low inertia reserve and the maximum peak power tracking control may increase the difficulty of maintaining the system’s supply⁻demand balance, and cause frequency instability, especially when the available generation is excessive. This will require changes in the way the PV inverter is controlled. In this paper, a virtual inertia frequency control (VIFC) strategy is proposed to let the two-stage PV inverters emulate inertia and support the system frequency with a timely response (e.g., inertia response), and the required power for inertia emulation is obtained from both the DC-link capacitor and the PV reserved energy. As the rate of the system frequency change can be reduced with the inertia increase, the proposed method can mitigate the frequency contingency event before the superior-level coordination control is enabled for the frequency restoration. The simulation results demonstrate the effectiveness of the proposed method.https://www.mdpi.com/2079-9292/7/11/340inertia emulationislanded micro-gridfrequency supportPV generatorsinverter control |
| spellingShingle | Xin Huang Keyou Wang Guojie Li Hua Zhang Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid Electronics inertia emulation islanded micro-grid frequency support PV generators inverter control |
| title | Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid |
| title_full | Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid |
| title_fullStr | Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid |
| title_full_unstemmed | Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid |
| title_short | Virtual Inertia-Based Control Strategy of Two-Stage Photovoltaic Inverters for Frequency Support in Islanded Micro-Grid |
| title_sort | virtual inertia based control strategy of two stage photovoltaic inverters for frequency support in islanded micro grid |
| topic | inertia emulation islanded micro-grid frequency support PV generators inverter control |
| url | https://www.mdpi.com/2079-9292/7/11/340 |
| work_keys_str_mv | AT xinhuang virtualinertiabasedcontrolstrategyoftwostagephotovoltaicinvertersforfrequencysupportinislandedmicrogrid AT keyouwang virtualinertiabasedcontrolstrategyoftwostagephotovoltaicinvertersforfrequencysupportinislandedmicrogrid AT guojieli virtualinertiabasedcontrolstrategyoftwostagephotovoltaicinvertersforfrequencysupportinislandedmicrogrid AT huazhang virtualinertiabasedcontrolstrategyoftwostagephotovoltaicinvertersforfrequencysupportinislandedmicrogrid |