Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy
Large-scale wind farms connect to the grid and deliver electrical energy to the load center. When a short-circuit fault occurs on the transmission line, there will be an excess of electric power, but the power demand will increase instantaneously once the fault is removed. The conventional additiona...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-12-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/12/1/38 |
| _version_ | 1811184728095588352 |
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| author | Xiangwu Yan Zijun Song Yun Xu Ying Sun Ziheng Wang Xuewei Sun |
| author_facet | Xiangwu Yan Zijun Song Yun Xu Ying Sun Ziheng Wang Xuewei Sun |
| author_sort | Xiangwu Yan |
| collection | DOAJ |
| description | Large-scale wind farms connect to the grid and deliver electrical energy to the load center. When a short-circuit fault occurs on the transmission line, there will be an excess of electric power, but the power demand will increase instantaneously once the fault is removed. The conventional additional frequency control strategies of wind farms can effectively reduce the frequency fluctuation caused by load mutation, but still there are some limitations for the frequency fluctuation caused by the whole process of occurrence, development and removal of a short-circuit fault on the transmission line. Therefore, this paper presents an improved additional frequency control strategy for wind farms. According to the variation law of system frequency during the whole process of a short-circuit fault, the proposed strategy revises the parameters in conventional additional frequency control of the doubly-fed induction generator (DFIG) to have effective damping characteristics throughout the entire process from failure to removal, thereby the output power of DFIGs could respond to frequency fluctuation rapidly. MATLAB/ Simulink is used to build a four-machine two-area model for simulation analysis. The results show that the control strategy can effectively reduce the frequency fluctuation of DFIGs, and enhance the stability of the system. |
| first_indexed | 2024-04-11T13:17:25Z |
| format | Article |
| id | doaj.art-b61ebd95c1114264a31cdadcaa4c070b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T13:17:25Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-b61ebd95c1114264a31cdadcaa4c070b2022-12-22T04:22:22ZengMDPI AGEnergies1996-10732018-12-011213810.3390/en12010038en12010038Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control StrategyXiangwu Yan0Zijun Song1Yun Xu2Ying Sun3Ziheng Wang4Xuewei Sun5Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, ChinaKey Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, ChinaKey Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, ChinaKey Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, ChinaKey Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, ChinaKey Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province, North China Electric Power University, Baoding 071003, ChinaLarge-scale wind farms connect to the grid and deliver electrical energy to the load center. When a short-circuit fault occurs on the transmission line, there will be an excess of electric power, but the power demand will increase instantaneously once the fault is removed. The conventional additional frequency control strategies of wind farms can effectively reduce the frequency fluctuation caused by load mutation, but still there are some limitations for the frequency fluctuation caused by the whole process of occurrence, development and removal of a short-circuit fault on the transmission line. Therefore, this paper presents an improved additional frequency control strategy for wind farms. According to the variation law of system frequency during the whole process of a short-circuit fault, the proposed strategy revises the parameters in conventional additional frequency control of the doubly-fed induction generator (DFIG) to have effective damping characteristics throughout the entire process from failure to removal, thereby the output power of DFIGs could respond to frequency fluctuation rapidly. MATLAB/ Simulink is used to build a four-machine two-area model for simulation analysis. The results show that the control strategy can effectively reduce the frequency fluctuation of DFIGs, and enhance the stability of the system.http://www.mdpi.com/1996-1073/12/1/38doubly-fed induction generatorshort-circuit faultfrequency regulationvariable power tracking controlimproved additional frequency controlvariable coefficient regulationinertia and damping characteristics |
| spellingShingle | Xiangwu Yan Zijun Song Yun Xu Ying Sun Ziheng Wang Xuewei Sun Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy Energies doubly-fed induction generator short-circuit fault frequency regulation variable power tracking control improved additional frequency control variable coefficient regulation inertia and damping characteristics |
| title | Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy |
| title_full | Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy |
| title_fullStr | Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy |
| title_full_unstemmed | Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy |
| title_short | Study of Inertia and Damping Characteristics of Doubly Fed Induction Generators and Improved Additional Frequency Control Strategy |
| title_sort | study of inertia and damping characteristics of doubly fed induction generators and improved additional frequency control strategy |
| topic | doubly-fed induction generator short-circuit fault frequency regulation variable power tracking control improved additional frequency control variable coefficient regulation inertia and damping characteristics |
| url | http://www.mdpi.com/1996-1073/12/1/38 |
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