A Dispatchable Droop Control Method for PV Systems in DC Microgrids
Along with the sustained growth of photovoltaic (PV) penetration, the PV generation is expected to be more active in DC microgrids rather than maximum power generation. The droop control methods are generally adopted to achieve power regulation at steady-state and passive power-sharing at transient...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10018343/ |
| _version_ | 1797902260527693824 |
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| author | Jiahua Ni Bo Zhao Arman Goudarzi Yanjun Li Ji Xiang |
| author_facet | Jiahua Ni Bo Zhao Arman Goudarzi Yanjun Li Ji Xiang |
| author_sort | Jiahua Ni |
| collection | DOAJ |
| description | Along with the sustained growth of photovoltaic (PV) penetration, the PV generation is expected to be more active in DC microgrids rather than maximum power generation. The droop control methods are generally adopted to achieve power regulation at steady-state and passive power-sharing at transient state. However, the traditional <inline-formula> <tex-math notation="LaTeX">$V-I$ </tex-math></inline-formula> droop based control methods can not realize voltage dispatch orders and require mode switching to prevent overload problem which increases control complexity and deteriorate the performance. To address this issue, this paper proposes a novel dispatchable droop control method. The proposed method utilizes a two-layer hierarchical control structure. The primary layer is <inline-formula> <tex-math notation="LaTeX">$V-dp/dv$ </tex-math></inline-formula> droop control to achieve passive power-sharing at a smaller time scale. The secondary layer realizes power or voltage regulation based on the dispatch orders at a larger time scale. Moreover, with the <inline-formula> <tex-math notation="LaTeX">$dp/dv$ </tex-math></inline-formula> as the control variable, the proposed method realizes seamless mode switching and has the ability to roughly indicate the power margin of PVs, which is critical for dispatching PVs. Several case scenarios are conducted in hardware-in-loop tests to validate the feasibility and effectiveness of the proposed control strategy on DC microgrids. |
| first_indexed | 2024-04-10T09:14:52Z |
| format | Article |
| id | doaj.art-f5e6891c742d4e0f8d6c5a1d1fc91770 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-10T09:14:52Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-f5e6891c742d4e0f8d6c5a1d1fc917702023-02-21T00:01:18ZengIEEEIEEE Access2169-35362023-01-01117588759810.1109/ACCESS.2023.323759110018343A Dispatchable Droop Control Method for PV Systems in DC MicrogridsJiahua Ni0https://orcid.org/0000-0002-8614-1140Bo Zhao1https://orcid.org/0000-0003-4958-7802Arman Goudarzi2https://orcid.org/0000-0003-1264-6194Yanjun Li3https://orcid.org/0000-0003-4676-6223Ji Xiang4https://orcid.org/0000-0002-7234-6460College of Electrical Engineering, Zhejiang University, Hangzhou, ChinaThe Electric Power Research Institute State Grid Zhejiang Electric Power Company Ltd., Hangzhou, ChinaCollege of Electrical Engineering, Zhejiang University, Hangzhou, ChinaZhejiang University City College, Hangzhou, ChinaCollege of Electrical Engineering, Zhejiang University, Hangzhou, ChinaAlong with the sustained growth of photovoltaic (PV) penetration, the PV generation is expected to be more active in DC microgrids rather than maximum power generation. The droop control methods are generally adopted to achieve power regulation at steady-state and passive power-sharing at transient state. However, the traditional <inline-formula> <tex-math notation="LaTeX">$V-I$ </tex-math></inline-formula> droop based control methods can not realize voltage dispatch orders and require mode switching to prevent overload problem which increases control complexity and deteriorate the performance. To address this issue, this paper proposes a novel dispatchable droop control method. The proposed method utilizes a two-layer hierarchical control structure. The primary layer is <inline-formula> <tex-math notation="LaTeX">$V-dp/dv$ </tex-math></inline-formula> droop control to achieve passive power-sharing at a smaller time scale. The secondary layer realizes power or voltage regulation based on the dispatch orders at a larger time scale. Moreover, with the <inline-formula> <tex-math notation="LaTeX">$dp/dv$ </tex-math></inline-formula> as the control variable, the proposed method realizes seamless mode switching and has the ability to roughly indicate the power margin of PVs, which is critical for dispatching PVs. Several case scenarios are conducted in hardware-in-loop tests to validate the feasibility and effectiveness of the proposed control strategy on DC microgrids.https://ieeexplore.ieee.org/document/10018343/PV systemdispatchablehierarchical controlV-dp/dv droop controlDC microgrids |
| spellingShingle | Jiahua Ni Bo Zhao Arman Goudarzi Yanjun Li Ji Xiang A Dispatchable Droop Control Method for PV Systems in DC Microgrids IEEE Access PV system dispatchable hierarchical control V-dp/dv droop control DC microgrids |
| title | A Dispatchable Droop Control Method for PV Systems in DC Microgrids |
| title_full | A Dispatchable Droop Control Method for PV Systems in DC Microgrids |
| title_fullStr | A Dispatchable Droop Control Method for PV Systems in DC Microgrids |
| title_full_unstemmed | A Dispatchable Droop Control Method for PV Systems in DC Microgrids |
| title_short | A Dispatchable Droop Control Method for PV Systems in DC Microgrids |
| title_sort | dispatchable droop control method for pv systems in dc microgrids |
| topic | PV system dispatchable hierarchical control V-dp/dv droop control DC microgrids |
| url | https://ieeexplore.ieee.org/document/10018343/ |
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