A universal model for grid-connected converters reflecting power-internal voltage characteristics
With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/144537 |
| _version_ | 1826128204000133120 |
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| author | Peng, Qiao Fang, Jingyang Yang, Yongheng Blaabjerg, Frede |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Peng, Qiao Fang, Jingyang Yang, Yongheng Blaabjerg, Frede |
| author_sort | Peng, Qiao |
| collection | NTU |
| description | With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are adopted. This paper thus proposes a universal model of grid-connected converters that can reflect the essential power-internal voltage characteristics. With that, the diversity of converter outer controllers may be discarded, as their dynamics can be represented by the deviation of active and reactive power. In the proposed model, the transfer functions from the converter output power to the internal voltage and to the Phase-Locked Loop (PLL) output frequency are obtained, enabling the exploration of the stability of the internal voltage and the PLL performance. An example system is adopted to demonstrate the proposed model and simulated in PSCAD/EMTDC. The results show that the model is accurate to reflect the impact of controller parameters on the power-internal voltage stability of the entire system. |
| first_indexed | 2024-10-01T07:21:06Z |
| format | Conference Paper |
| id | ntu-10356/144537 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:21:06Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1445372020-11-11T07:19:11Z A universal model for grid-connected converters reflecting power-internal voltage characteristics Peng, Qiao Fang, Jingyang Yang, Yongheng Blaabjerg, Frede School of Electrical and Electronic Engineering 2018 IEEE 4th Southern Power Electronics Conference (SPEC) Engineering::Electrical and electronic engineering Grid-connected Power Converter Modelling With the still increasing penetration of renewable energy, the power system is being more power electronics based and digital. The diversity of grid-connected power converters with various control strategies complicates the analysis of system dynamics, when various and detailed converter models are adopted. This paper thus proposes a universal model of grid-connected converters that can reflect the essential power-internal voltage characteristics. With that, the diversity of converter outer controllers may be discarded, as their dynamics can be represented by the deviation of active and reactive power. In the proposed model, the transfer functions from the converter output power to the internal voltage and to the Phase-Locked Loop (PLL) output frequency are obtained, enabling the exploration of the stability of the internal voltage and the PLL performance. An example system is adopted to demonstrate the proposed model and simulated in PSCAD/EMTDC. The results show that the model is accurate to reflect the impact of controller parameters on the power-internal voltage stability of the entire system. Accepted version 2020-11-11T07:19:11Z 2020-11-11T07:19:11Z 2018 Conference Paper Peng, Q., Fang, J., Yang, Y., & Blaabjerg, F. (2018). A Universal Model for Grid-Connected Converters Reflecting Power-Internal Voltage Characteristics. 2018 IEEE 4th Southern Power Electronics Conference (SPEC). doi:10.1109/spec.2018.8635858 978-1-5386-8257-9 https://hdl.handle.net/10356/144537 10.1109/SPEC.2018.8635858 en © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/SPEC.2018.8635858. application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Grid-connected Power Converter Modelling Peng, Qiao Fang, Jingyang Yang, Yongheng Blaabjerg, Frede A universal model for grid-connected converters reflecting power-internal voltage characteristics |
| title | A universal model for grid-connected converters reflecting power-internal voltage characteristics |
| title_full | A universal model for grid-connected converters reflecting power-internal voltage characteristics |
| title_fullStr | A universal model for grid-connected converters reflecting power-internal voltage characteristics |
| title_full_unstemmed | A universal model for grid-connected converters reflecting power-internal voltage characteristics |
| title_short | A universal model for grid-connected converters reflecting power-internal voltage characteristics |
| title_sort | universal model for grid connected converters reflecting power internal voltage characteristics |
| topic | Engineering::Electrical and electronic engineering Grid-connected Power Converter Modelling |
| url | https://hdl.handle.net/10356/144537 |
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