Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system
The high percentage of renewable energy connected to the grid requires high operational flexibility of combined heat and power (CHP) units. As two products of the CHP units, electricity and heat are coupled, making it challenging to achieve coordinated control. The thermal energy storage (TES) syste...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235248472301048X |
| _version_ | 1797378654523621376 |
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| author | Xiaoyu Wang Lijiang Dong Qing Zhu Yongji Li Hongzhi Han Jiahao Liang Bingde Duan |
| author_facet | Xiaoyu Wang Lijiang Dong Qing Zhu Yongji Li Hongzhi Han Jiahao Liang Bingde Duan |
| author_sort | Xiaoyu Wang |
| collection | DOAJ |
| description | The high percentage of renewable energy connected to the grid requires high operational flexibility of combined heat and power (CHP) units. As two products of the CHP units, electricity and heat are coupled, making it challenging to achieve coordinated control. The thermal energy storage (TES) system can smooth out the fluctuations in heat load demand by storing or releasing heat, thus aiding in the decoupling and coordinated control of electricity and heat. In this paper, an optimized control strategy of CHP units integrated with the TES system is proposed to improve the units’ operating flexibility. First, according to the operating mechanism, the dynamic models of the CHP unit and the TES system are established. On this basis, considering the heat source steam active response based on the linear quadratic regulator and the heat-supply support of the TES system, the boiler-turbine-heating-storage coordinated control system of a CHP unit is designed. The simulation experiment is conducted in a 300 MW CHP unit. The results show that compared with the conventional control strategy, the MAE, MAPE, MSE, and RMSE indicators of the electrical power output are decreased by 45.88%, 45.28%, 71.95%, and 47.04%, respectively. |
| first_indexed | 2024-03-08T20:10:48Z |
| format | Article |
| id | doaj.art-14cd32f92c8d42379dca2f19a35b62a6 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-03-08T20:10:48Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-14cd32f92c8d42379dca2f19a35b62a62023-12-23T05:21:04ZengElsevierEnergy Reports2352-48472023-11-0110396406Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage systemXiaoyu Wang0Lijiang Dong1Qing Zhu2Yongji Li3Hongzhi Han4Jiahao Liang5Bingde Duan6Xinjiang Xinneng Group Urumqi Electric Power Construction and Commissioning Institute, Urumqi 830011, China; State Grid Xinjiang Company Limited Electric Power Research Institute, Urumqi 830011, ChinaXinjiang Xinneng Group Urumqi Electric Power Construction and Commissioning Institute, Urumqi 830011, ChinaState Grid Xinjiang Electric Power Company Limited, Urumqi 830002, ChinaState Grid Xinjiang Company Limited Electric Power Research Institute, Urumqi 830011, ChinaState Grid Xinjiang Company Limited Electric Power Research Institute, Urumqi 830011, China; Corresponding author.State Grid Xinjiang Company Limited Electric Power Research Institute, Urumqi 830011, ChinaXinjiang Xinneng Group Urumqi Electric Power Construction and Commissioning Institute, Urumqi 830011, ChinaThe high percentage of renewable energy connected to the grid requires high operational flexibility of combined heat and power (CHP) units. As two products of the CHP units, electricity and heat are coupled, making it challenging to achieve coordinated control. The thermal energy storage (TES) system can smooth out the fluctuations in heat load demand by storing or releasing heat, thus aiding in the decoupling and coordinated control of electricity and heat. In this paper, an optimized control strategy of CHP units integrated with the TES system is proposed to improve the units’ operating flexibility. First, according to the operating mechanism, the dynamic models of the CHP unit and the TES system are established. On this basis, considering the heat source steam active response based on the linear quadratic regulator and the heat-supply support of the TES system, the boiler-turbine-heating-storage coordinated control system of a CHP unit is designed. The simulation experiment is conducted in a 300 MW CHP unit. The results show that compared with the conventional control strategy, the MAE, MAPE, MSE, and RMSE indicators of the electrical power output are decreased by 45.88%, 45.28%, 71.95%, and 47.04%, respectively.http://www.sciencedirect.com/science/article/pii/S235248472301048XCombined heat and powerThermal energy storage systemCoordinated control system controlOperating flexibilityLinear quadratic regulator |
| spellingShingle | Xiaoyu Wang Lijiang Dong Qing Zhu Yongji Li Hongzhi Han Jiahao Liang Bingde Duan Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system Energy Reports Combined heat and power Thermal energy storage system Coordinated control system control Operating flexibility Linear quadratic regulator |
| title | Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system |
| title_full | Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system |
| title_fullStr | Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system |
| title_full_unstemmed | Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system |
| title_short | Dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system |
| title_sort | dynamic modeling and flexible control of combined heat and power units integrated with thermal energy storage system |
| topic | Combined heat and power Thermal energy storage system Coordinated control system control Operating flexibility Linear quadratic regulator |
| url | http://www.sciencedirect.com/science/article/pii/S235248472301048X |
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