A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode
The increasing penetration of renewable generators can be a significant challenge due to the fluctuation of their power generation. Energy storage (ES) units are one solution to improve power supply quality and guarantee system stability. In this paper, a hybrid microgrid is built based on photovolt...
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| Format: | Article |
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MDPI AG
2016-08-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/9/8/651 |
| _version_ | 1798006656166002688 |
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| author | Yao Liu Xiaochao Hou Xiaofeng Wang Chao Lin Josep M. Guerrero |
| author_facet | Yao Liu Xiaochao Hou Xiaofeng Wang Chao Lin Josep M. Guerrero |
| author_sort | Yao Liu |
| collection | DOAJ |
| description | The increasing penetration of renewable generators can be a significant challenge due to the fluctuation of their power generation. Energy storage (ES) units are one solution to improve power supply quality and guarantee system stability. In this paper, a hybrid microgrid is built based on photovoltaic (PV) generator and ES; and coordinated control is proposed and developed to achieve power management in a decentralized manner. This control scheme contains three different droop strategies according to characteristics of PV and ES. First, the modified droop control is proposed for PV, which can take full utilization of renewable energy and avoid regulating output active power frequently. Second, to maintain the direct current (DC) bus voltage stability, a novel droop control incorporating a constant power band is presented for DC-side ES. Third, a cascade droop control is designed for alternating current (AC)-side ES. Thus, the ES lifetime is prolonged. Moreover, interlinking converters (ICs) provide a bridge between AC/DC buses in a hybrid microgrid. The power control of IC is enabled when the AC- or DC-side suffer from active power demand shortage. In particular, if the AC microgrid does not satisfy the reactive power demand, IC then acts as a static synchronous compensator (STATCOM). The effectiveness of the proposed strategies is verified by simulations. |
| first_indexed | 2024-04-11T12:58:00Z |
| format | Article |
| id | doaj.art-31dd497ce44d4d5884523392a836809d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:58:00Z |
| publishDate | 2016-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-31dd497ce44d4d5884523392a836809d2022-12-22T04:23:01ZengMDPI AGEnergies1996-10732016-08-019865110.3390/en9080651en9080651A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded ModeYao Liu0Xiaochao Hou1Xiaofeng Wang2Chao Lin3Josep M. Guerrero4Zhuhai Power Supply Bureau of Guangdong Power Grid Corporation, Zhuhai 519000, ChinaSchool of Information Science and Engineering, Central South University, Changsha 410083, ChinaZhuhai Power Supply Bureau of Guangdong Power Grid Corporation, Zhuhai 519000, ChinaZhuhai Power Supply Bureau of Guangdong Power Grid Corporation, Zhuhai 519000, ChinaDepartment of Energy Technology, Aalborg University, Aalborg East DK-9220, DenmarkThe increasing penetration of renewable generators can be a significant challenge due to the fluctuation of their power generation. Energy storage (ES) units are one solution to improve power supply quality and guarantee system stability. In this paper, a hybrid microgrid is built based on photovoltaic (PV) generator and ES; and coordinated control is proposed and developed to achieve power management in a decentralized manner. This control scheme contains three different droop strategies according to characteristics of PV and ES. First, the modified droop control is proposed for PV, which can take full utilization of renewable energy and avoid regulating output active power frequently. Second, to maintain the direct current (DC) bus voltage stability, a novel droop control incorporating a constant power band is presented for DC-side ES. Third, a cascade droop control is designed for alternating current (AC)-side ES. Thus, the ES lifetime is prolonged. Moreover, interlinking converters (ICs) provide a bridge between AC/DC buses in a hybrid microgrid. The power control of IC is enabled when the AC- or DC-side suffer from active power demand shortage. In particular, if the AC microgrid does not satisfy the reactive power demand, IC then acts as a static synchronous compensator (STATCOM). The effectiveness of the proposed strategies is verified by simulations.http://www.mdpi.com/1996-1073/9/8/651coordinated power controldroop controlhybrid microgridinterlinking converters (ICs)static synchronous compensator (STATCOM) |
| spellingShingle | Yao Liu Xiaochao Hou Xiaofeng Wang Chao Lin Josep M. Guerrero A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode Energies coordinated power control droop control hybrid microgrid interlinking converters (ICs) static synchronous compensator (STATCOM) |
| title | A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode |
| title_full | A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode |
| title_fullStr | A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode |
| title_full_unstemmed | A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode |
| title_short | A Coordinated Control for Photovoltaic Generators and Energy Storages in Low-Voltage AC/DC Hybrid Microgrids under Islanded Mode |
| title_sort | coordinated control for photovoltaic generators and energy storages in low voltage ac dc hybrid microgrids under islanded mode |
| topic | coordinated power control droop control hybrid microgrid interlinking converters (ICs) static synchronous compensator (STATCOM) |
| url | http://www.mdpi.com/1996-1073/9/8/651 |
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