FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids
The appearance of ultra-low-frequency oscillations in the grid at the sending end, after asynchronous grid interconnection, poses a significant threat to the stable operation of the system. For post-asynchronous interconnection in a multi-DC transmission system, an investigation is conducted to anal...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-03-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/6/1300 |
| _version_ | 1827306441578381312 |
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| author | Chao Xing Mingqun Liu Junzhen Peng Yuhong Wang Yichen Zhou Zongsheng Zheng Shilin Gao Jianquan Liao |
| author_facet | Chao Xing Mingqun Liu Junzhen Peng Yuhong Wang Yichen Zhou Zongsheng Zheng Shilin Gao Jianquan Liao |
| author_sort | Chao Xing |
| collection | DOAJ |
| description | The appearance of ultra-low-frequency oscillations in the grid at the sending end, after asynchronous grid interconnection, poses a significant threat to the stable operation of the system. For post-asynchronous interconnection in a multi-DC transmission system, an investigation is conducted to analyze the causes of ultra-low-frequency oscillations and the utilization of a Frequency Limit Controller (FLC) which aims to suppress these oscillations. Furthermore, a method is developed to rank DC sensitivity, considering the hydroelectric distribution in the sending-end grid, by combining the DC FLC impact factor and DC control sensitivity. Subsequently, a novel approach for ultra-low-frequency oscillation suppression is proposed. This approach employs the stochastic subspace method for parameter estimation and the NSGA-II optimization algorithm to convert the multi-DC optimization challenge into multiple sequential cyclic optimization problems, each focusing on a single DC, ensuring a more effective suppression of ultra-low-frequency oscillations. The proposed scheme’s effectiveness is validated through simulations using a specific locations’ interconnected power grid. |
| first_indexed | 2024-04-24T18:21:30Z |
| format | Article |
| id | doaj.art-9cf2ece2d0104dfc8dba77153b6ed869 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-24T18:21:30Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-9cf2ece2d0104dfc8dba77153b6ed8692024-03-27T13:35:23ZengMDPI AGEnergies1996-10732024-03-01176130010.3390/en17061300FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power GridsChao Xing0Mingqun Liu1Junzhen Peng2Yuhong Wang3Yichen Zhou4Zongsheng Zheng5Shilin Gao6Jianquan Liao7Power Science Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, ChinaPower Science Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, ChinaPower Science Research Institute, Yunnan Power Grid Co., Ltd., Kunming 650217, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaSchool of Electrical Engineering, Sichuan University, Chengdu 610065, ChinaThe appearance of ultra-low-frequency oscillations in the grid at the sending end, after asynchronous grid interconnection, poses a significant threat to the stable operation of the system. For post-asynchronous interconnection in a multi-DC transmission system, an investigation is conducted to analyze the causes of ultra-low-frequency oscillations and the utilization of a Frequency Limit Controller (FLC) which aims to suppress these oscillations. Furthermore, a method is developed to rank DC sensitivity, considering the hydroelectric distribution in the sending-end grid, by combining the DC FLC impact factor and DC control sensitivity. Subsequently, a novel approach for ultra-low-frequency oscillation suppression is proposed. This approach employs the stochastic subspace method for parameter estimation and the NSGA-II optimization algorithm to convert the multi-DC optimization challenge into multiple sequential cyclic optimization problems, each focusing on a single DC, ensuring a more effective suppression of ultra-low-frequency oscillations. The proposed scheme’s effectiveness is validated through simulations using a specific locations’ interconnected power grid.https://www.mdpi.com/1996-1073/17/6/1300ultra-low-frequency oscillationsfrequency limit controllerstochastic subspace methodNSGA-II optimization algorithm |
| spellingShingle | Chao Xing Mingqun Liu Junzhen Peng Yuhong Wang Yichen Zhou Zongsheng Zheng Shilin Gao Jianquan Liao FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids Energies ultra-low-frequency oscillations frequency limit controller stochastic subspace method NSGA-II optimization algorithm |
| title | FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids |
| title_full | FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids |
| title_fullStr | FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids |
| title_full_unstemmed | FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids |
| title_short | FLC-Based Ultra-Low-Frequency Oscillation Suppression Scheme for Interconnected Power Grids |
| title_sort | flc based ultra low frequency oscillation suppression scheme for interconnected power grids |
| topic | ultra-low-frequency oscillations frequency limit controller stochastic subspace method NSGA-II optimization algorithm |
| url | https://www.mdpi.com/1996-1073/17/6/1300 |
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