Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices
The weak grid strength in regions with large-scale renewable energy integration has emerged as a universal challenge, limiting the further expansion of renewable energy development. Currently, the short-circuit ratio (SCR) is widely used to quantify the relative strength between AC systems and renew...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/14/3880 |
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| author | Jie Cao Mingshun Liu Qinfeng Ma Junqiu Fan Dongkuo Song Xia Zhou Jianfeng Dai Hao Wu |
| author_facet | Jie Cao Mingshun Liu Qinfeng Ma Junqiu Fan Dongkuo Song Xia Zhou Jianfeng Dai Hao Wu |
| author_sort | Jie Cao |
| collection | DOAJ |
| description | The weak grid strength in regions with large-scale renewable energy integration has emerged as a universal challenge, limiting the further expansion of renewable energy development. Currently, the short-circuit ratio (SCR) is widely used to quantify the relative strength between AC systems and renewable energy. To address this issue, this study first analyzes and compares how different reactive power compensation methods enhance the SCR. It then proposes calculation frameworks for both the SCR and critical short-circuit ratio (CSCR) in renewable energy grid-connected systems integrated with reactive power compensation. Furthermore, based on these formulations, a quantitative evaluation methodology for voltage support strength is developed to systematically assess the improvement effects of various compensation approaches on grid strength. Finally, case studies verify that reactive power compensation provided by synchronous condensers effectively strengthens grid strength and facilitates the safe expansion of the renewable energy integration scale. |
| format | Article |
| id | doaj-art-63f586fcf7a24302af2790da7cc8c9f9 |
| institution | DOAJ |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-63f586fcf7a24302af2790da7cc8c9f92025-08-20T03:08:01ZengMDPI AGEnergies1996-10732025-07-011814388010.3390/en18143880Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation DevicesJie Cao0Mingshun Liu1Qinfeng Ma2Junqiu Fan3Dongkuo Song4Xia Zhou5Jianfeng Dai6Hao Wu7Guizhou Power Grid Co., Ltd., Guiyang 550002, ChinaGuizhou Power Grid Co., Ltd., Guiyang 550002, ChinaGuizhou Power Grid Co., Ltd., Guiyang 550002, ChinaGuizhou Power Grid Co., Ltd., Guiyang 550002, ChinaGuodian Nari Nanjing Control System Co., Ltd., Nanjing 210008, ChinaSchool of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaSchool of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaSchool of Automation, Nanjing University of Posts and Telecommunications, Nanjing 210023, ChinaThe weak grid strength in regions with large-scale renewable energy integration has emerged as a universal challenge, limiting the further expansion of renewable energy development. Currently, the short-circuit ratio (SCR) is widely used to quantify the relative strength between AC systems and renewable energy. To address this issue, this study first analyzes and compares how different reactive power compensation methods enhance the SCR. It then proposes calculation frameworks for both the SCR and critical short-circuit ratio (CSCR) in renewable energy grid-connected systems integrated with reactive power compensation. Furthermore, based on these formulations, a quantitative evaluation methodology for voltage support strength is developed to systematically assess the improvement effects of various compensation approaches on grid strength. Finally, case studies verify that reactive power compensation provided by synchronous condensers effectively strengthens grid strength and facilitates the safe expansion of the renewable energy integration scale.https://www.mdpi.com/1996-1073/18/14/3880weak grid strengthrenewable energy integrationvoltage support strengthsynchronous condensers |
| spellingShingle | Jie Cao Mingshun Liu Qinfeng Ma Junqiu Fan Dongkuo Song Xia Zhou Jianfeng Dai Hao Wu Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices Energies weak grid strength renewable energy integration voltage support strength synchronous condensers |
| title | Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices |
| title_full | Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices |
| title_fullStr | Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices |
| title_full_unstemmed | Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices |
| title_short | Assessment of Grid-Tied Renewable Energy Systems’ Voltage Support Capability Under Various Reactive Power Compensation Devices |
| title_sort | assessment of grid tied renewable energy systems voltage support capability under various reactive power compensation devices |
| topic | weak grid strength renewable energy integration voltage support strength synchronous condensers |
| url | https://www.mdpi.com/1996-1073/18/14/3880 |
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