دورية أكاديمية
Optimal negative sequence current suppression strategy without phase‐locked loop based on the control of clustered new energy power stations
| العنوان: | Optimal negative sequence current suppression strategy without phase‐locked loop based on the control of clustered new energy power stations |
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| المؤلفون: | Zhenxing Li, Yi Zhu, Cong Hu, Hong Tan, Hanli Weng, Zhenhua Li |
| المصدر: | IET Generation, Transmission & Distribution, Vol 17, Iss 19, Pp 4248-4257 (2023) |
| بيانات النشر: | Wiley, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Production of electric energy or power. Powerplants. Central stations |
| مصطلحات موضوعية: | capacity constraint, grid‐connected inverter, negative sequence current suppression, none phase‐locked loop (PLL), Distribution or transmission of electric power, TK3001-3521, Production of electric energy or power. Powerplants. Central stations, TK1001-1841 |
| الوصف: | Abstract In the context of extremely uneven sources and loads in China, several large‐scale power transmission systems have been established. Affected by the small equivalent impedance of the system, the increase of negative sequence currents during open‐phase operation has seriously threatened the stable operation of synchronous generators. The necessity of negative sequence current suppression is particularly prominent. To address the above issues, this paper analyzes the feasible negative sequence suppression capacity of the grid‐connected inverter under the principle of positive sequence priority. Using the geometric analysis method to determine the optimal suppression capacity. The none‐phase‐locked loop (PLL) control method is used to improve the response speed and form the negative sequence current suppression strategy adapted to the open‐phase operation period. A simulation model was built in PSCAD to verify the effectiveness of the proposed strategy. The result shows that the suppression strategy has a faster response than the conventional PLL control. In scenarios with large negative sequence currents to be suppressed, a maximum suppression effect of approximately 63% can be achieved. Compared with the traditional suppression capacity selection, the strategy in this paper can reduce the residual of negative sequence current by about 10% at most. The negative sequence currents intruding into the generator can be effectively suppressed without additional devices. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1751-8695 1751-8687 |
| Relation: | https://doaj.org/toc/1751-8687; https://doaj.org/toc/1751-8695 |
| DOI: | 10.1049/gtd2.12870 |
| URL الوصول: | https://doaj.org/article/9f7ceaaa8b224a71b3964a6736fc2c6c |
| رقم الأكسشن: | edsdoj.9f7ceaaa8b224a71b3964a6736fc2c6c |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 17518695 17518687 |
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| DOI: | 10.1049/gtd2.12870 |