A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines
Experimental approaches for the identification of dynamic parameters in synchronous machines mainly include two methods, a three-phase sudden short-circuit (TPSSC) test and a standstill frequency response (SSFR) test. However, the former has significant safety risks, while the latter has a complex i...
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2025-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/2/279 |
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| author | Zhenming Lai Haoyu Kang Demin Liu Zhichao Wang Yong Yang Jin Wang |
| author_facet | Zhenming Lai Haoyu Kang Demin Liu Zhichao Wang Yong Yang Jin Wang |
| author_sort | Zhenming Lai |
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| description | Experimental approaches for the identification of dynamic parameters in synchronous machines mainly include two methods, a three-phase sudden short-circuit (TPSSC) test and a standstill frequency response (SSFR) test. However, the former has significant safety risks, while the latter has a complex implementation process, resulting in insufficient adaptability to large-scale units. To overcome the above obstacles, this paper proposes an improved DC-decay test method that can be performed at an arbitrary rotor position so that the rotor pre-positioning process in the conventional DC-decay test can be neglected. Meanwhile, combining the transient analysis theory and particle swarm optimization algorithm, a semi-analytical parameter identification method is proposed. Finally, the proposed method is applied using a 172 MVA large synchronous machine. Compared to the results obtained by the TPSSC test using the Prony algorithm and other conventional type tests, the error of the parameter calculation results obtained with the conventional method reached a maximum of 16.6%, while that of the proposed method was merely 8.6%, and the experimental period could be shortened from 5 days to half a day. |
| format | Article |
| id | doaj-art-0c023fad79a54293b66dec8de299c7d0 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-0c023fad79a54293b66dec8de299c7d02025-01-24T13:30:52ZengMDPI AGEnergies1996-10732025-01-0118227910.3390/en18020279A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous MachinesZhenming Lai0Haoyu Kang1Demin Liu2Zhichao Wang3Yong Yang4Jin Wang5Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, ChinaState Key Laboratory of Advanced Electromagnetic Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaDongfang Electric Machinery Co., Ltd., Dongfang Electric Corporation, Deyang 618000, ChinaDongfang Electric Machinery Co., Ltd., Dongfang Electric Corporation, Deyang 618000, ChinaDongfang Electric Machinery Co., Ltd., Dongfang Electric Corporation, Deyang 618000, ChinaState Key Laboratory of Advanced Electromagnetic Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaExperimental approaches for the identification of dynamic parameters in synchronous machines mainly include two methods, a three-phase sudden short-circuit (TPSSC) test and a standstill frequency response (SSFR) test. However, the former has significant safety risks, while the latter has a complex implementation process, resulting in insufficient adaptability to large-scale units. To overcome the above obstacles, this paper proposes an improved DC-decay test method that can be performed at an arbitrary rotor position so that the rotor pre-positioning process in the conventional DC-decay test can be neglected. Meanwhile, combining the transient analysis theory and particle swarm optimization algorithm, a semi-analytical parameter identification method is proposed. Finally, the proposed method is applied using a 172 MVA large synchronous machine. Compared to the results obtained by the TPSSC test using the Prony algorithm and other conventional type tests, the error of the parameter calculation results obtained with the conventional method reached a maximum of 16.6%, while that of the proposed method was merely 8.6%, and the experimental period could be shortened from 5 days to half a day.https://www.mdpi.com/1996-1073/18/2/279arbitrary rotor positionDC decayparameter identificationsynchronous machine |
| spellingShingle | Zhenming Lai Haoyu Kang Demin Liu Zhichao Wang Yong Yang Jin Wang A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines Energies arbitrary rotor position DC decay parameter identification synchronous machine |
| title | A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines |
| title_full | A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines |
| title_fullStr | A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines |
| title_full_unstemmed | A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines |
| title_short | A Semi-Analytical Method for the Identification of DC-Decay Parameters at an Arbitrary Rotor Position in Large Synchronous Machines |
| title_sort | semi analytical method for the identification of dc decay parameters at an arbitrary rotor position in large synchronous machines |
| topic | arbitrary rotor position DC decay parameter identification synchronous machine |
| url | https://www.mdpi.com/1996-1073/18/2/279 |
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