Research on Transient Overvoltage Characteristics and Mapping Relationships of Photovoltaic/PMSG Under Electromagnetic/Electromechanical Models.
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| Title: | Research on Transient Overvoltage Characteristics and Mapping Relationships of Photovoltaic/PMSG Under Electromagnetic/Electromechanical Models. |
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| Authors: | Xu, Shiyun1 (AUTHOR), Liu, Shiqi1 (AUTHOR), Wang, Shuyan2 (AUTHOR), Bi, Jingtian1 (AUTHOR) bijingtian@epri.sgcc.com.cn, Lan, Tiankai1 (AUTHOR) |
| Source: | IET Renewable Power Generation (Wiley-Blackwell). Jan2025, Vol. 19 Issue 1, p1-21. 21p. |
| Subjects: | Photovoltaic power generation, Overvoltage, Permanent magnet generators, Computational electromagnetics, Electromechanical effects, Statistical correlation, Sensitivity analysis |
| Geographic Terms: | China |
| Abstract: | As the 'dual carbon' goals continue to advance in China, the grid‐connected scale of new energy power generation equipment such as wind power and photovoltaic power is constantly increasing. Transient overvoltage issues caused by fault disturbances are becoming increasingly frequent, significantly increasing the risk of cascading grid disconnection and equipment damage. Therefore, rapid and accurate assessment of transient overvoltage in new energy systems is of critical importance. This paper first analyses the characteristics of transient overvoltage in new energy sources under both electromagnetic and electromechanical transient models, comparing the trends in key electrical parameters under the two types of models. Then, to combine the advantages of high accuracy in electromagnetic transient models and high speed in electromechanical transient models, this paper uses the Morris global sensitivity analysis method to identify the key influencing factors of transient overvoltage peaks. Subsequently, the QR decomposition‐based least squares method is employed to study the mapping relationship between overvoltage peaks in electromagnetic and electromechanical models. Finally, simulation verification confirms the accuracy of the mapping relationship. This method provides important references for system operation and maintenance, and also offers directions for further optimising system performance. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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