Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle
The widely used flywheel energy storage (FES) system has such advantages as high power density, no environment pollution, a long service life, a wide operating temperature range, and unlimited charging−discharging times. The flywheel array energy storage system (FAESS), which includes the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/15/2844 |
| _version_ | 1811299739404075008 |
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| author | Changli Shi Tongzhen Wei Xisheng Tang Long Zhou Tongshuo Zhang |
| author_facet | Changli Shi Tongzhen Wei Xisheng Tang Long Zhou Tongshuo Zhang |
| author_sort | Changli Shi |
| collection | DOAJ |
| description | The widely used flywheel energy storage (FES) system has such advantages as high power density, no environment pollution, a long service life, a wide operating temperature range, and unlimited charging−discharging times. The flywheel array energy storage system (FAESS), which includes the multiple standardized flywheel energy storage unit (FESU), is an effective solution for obtaining large capacity and high-power energy storage. In this paper, the strategy for coordinating and controlling the charging−discharging of the FAESS is studied in depth. Firstly, a deep analysis is conducted on the loss generated during the charging−discharging process of the FESU. The results indicate that the loss is related to the charging−discharging of power. To solve the problems of over-charging, over-discharging, and overcurrent caused by traditional charging−discharging control strategies, this paper proposes a charging−discharging coordination control strategy based on the equal incremental principle (EIP). This strategy aims to minimize the total loss and establish a mathematical model of optimal coordination control with the constraints of total charging−discharging power, rated power limit, over-charging, over-discharging, and overcurrent. Based on the EIP, the optimal distribution scheme of power charging−discharging is determined. Secondly, this paper gives the specific implementation scheme of the optimal coordinated control strategy. Lastly, the charging−discharging coordinated control strategy is verified by examples. The results show that the coordinated control strategy can effectively reduce the loss during the charging−discharging process and can prevent over-charging, over-discharging, and overcurrent of the system. Overall, it has a better control effect than the existing charging−discharging control strategies. |
| first_indexed | 2024-04-13T06:41:12Z |
| format | Article |
| id | doaj.art-8291d85bb3b744b696d7863cc89283ea |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T06:41:12Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-8291d85bb3b744b696d7863cc89283ea2022-12-22T02:57:44ZengMDPI AGEnergies1996-10732019-07-011215284410.3390/en12152844en12152844Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental PrincipleChangli Shi0Tongzhen Wei1Xisheng Tang2Long Zhou3Tongshuo Zhang4Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaThe widely used flywheel energy storage (FES) system has such advantages as high power density, no environment pollution, a long service life, a wide operating temperature range, and unlimited charging−discharging times. The flywheel array energy storage system (FAESS), which includes the multiple standardized flywheel energy storage unit (FESU), is an effective solution for obtaining large capacity and high-power energy storage. In this paper, the strategy for coordinating and controlling the charging−discharging of the FAESS is studied in depth. Firstly, a deep analysis is conducted on the loss generated during the charging−discharging process of the FESU. The results indicate that the loss is related to the charging−discharging of power. To solve the problems of over-charging, over-discharging, and overcurrent caused by traditional charging−discharging control strategies, this paper proposes a charging−discharging coordination control strategy based on the equal incremental principle (EIP). This strategy aims to minimize the total loss and establish a mathematical model of optimal coordination control with the constraints of total charging−discharging power, rated power limit, over-charging, over-discharging, and overcurrent. Based on the EIP, the optimal distribution scheme of power charging−discharging is determined. Secondly, this paper gives the specific implementation scheme of the optimal coordinated control strategy. Lastly, the charging−discharging coordinated control strategy is verified by examples. The results show that the coordinated control strategy can effectively reduce the loss during the charging−discharging process and can prevent over-charging, over-discharging, and overcurrent of the system. Overall, it has a better control effect than the existing charging−discharging control strategies.https://www.mdpi.com/1996-1073/12/15/2844flywheel array energy storage systemminimization of total lossequal incremental principlepower distribution |
| spellingShingle | Changli Shi Tongzhen Wei Xisheng Tang Long Zhou Tongshuo Zhang Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle Energies flywheel array energy storage system minimization of total loss equal incremental principle power distribution |
| title | Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle |
| title_full | Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle |
| title_fullStr | Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle |
| title_full_unstemmed | Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle |
| title_short | Charging–Discharging Control Strategy for a Flywheel Array Energy Storage System Based on the Equal Incremental Principle |
| title_sort | charging discharging control strategy for a flywheel array energy storage system based on the equal incremental principle |
| topic | flywheel array energy storage system minimization of total loss equal incremental principle power distribution |
| url | https://www.mdpi.com/1996-1073/12/15/2844 |
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