Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC
Abstract Sub‐synchronous oscillation of grid‐connected voltage source converter (VSC) dominated by phase locked loop (PLL) is an important stability issue in nowadays power systems. The complex torque coefficient method has been used to investigate the issue because of its advantage of giving insigh...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-02-01
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| Series: | IET Renewable Power Generation |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/rpg2.12857 |
| _version_ | 1797295082017128448 |
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| author | Boyuan Zhao Lei Chen Yong Min Yalou Li Shiyun Xu |
| author_facet | Boyuan Zhao Lei Chen Yong Min Yalou Li Shiyun Xu |
| author_sort | Boyuan Zhao |
| collection | DOAJ |
| description | Abstract Sub‐synchronous oscillation of grid‐connected voltage source converter (VSC) dominated by phase locked loop (PLL) is an important stability issue in nowadays power systems. The complex torque coefficient method has been used to investigate the issue because of its advantage of giving insights into source of damping and contributions of different components on damping. However, it is found that the classic complex torque coefficient method is not entirely applicable for stability analysis of VSC because of the proportional term in PLL. This paper proposes a corrected complex torque coefficient method and defines synchronous and damping coefficients. Based on the proposed method, a small‐signal stability criterion is obtained, in which the system stability depends on the sign of corrected damping coefficient. The impacts of different elements on system damping can be quantitatively evaluated through the method. It is drawn that current control loop and line dynamics contribute negative damping, whereas power control loop contributes positive damping. Moreover, the impacts of operating conditions and controller parameters on damping of different elements are analysed. The eigenvalue analyses and electromagnetic transient simulations have verified the theoretical analysis. |
| first_indexed | 2024-03-07T21:41:37Z |
| format | Article |
| id | doaj.art-763829d4f95f487cb40b291c2c4e9147 |
| institution | Directory Open Access Journal |
| issn | 1752-1416 1752-1424 |
| language | English |
| last_indexed | 2024-03-07T21:41:37Z |
| publishDate | 2024-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Renewable Power Generation |
| spelling | doaj.art-763829d4f95f487cb40b291c2c4e91472024-02-26T08:05:21ZengWileyIET Renewable Power Generation1752-14161752-14242024-02-0118341242510.1049/rpg2.12857Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSCBoyuan Zhao0Lei Chen1Yong Min2Yalou Li3Shiyun Xu4Department of Electrical Engineering Tsinghua University Beijing ChinaDepartment of Electrical Engineering Tsinghua University Beijing ChinaDepartment of Electrical Engineering Tsinghua University Beijing ChinaChina Electric Power Research Institute Beijing ChinaChina Electric Power Research Institute Beijing ChinaAbstract Sub‐synchronous oscillation of grid‐connected voltage source converter (VSC) dominated by phase locked loop (PLL) is an important stability issue in nowadays power systems. The complex torque coefficient method has been used to investigate the issue because of its advantage of giving insights into source of damping and contributions of different components on damping. However, it is found that the classic complex torque coefficient method is not entirely applicable for stability analysis of VSC because of the proportional term in PLL. This paper proposes a corrected complex torque coefficient method and defines synchronous and damping coefficients. Based on the proposed method, a small‐signal stability criterion is obtained, in which the system stability depends on the sign of corrected damping coefficient. The impacts of different elements on system damping can be quantitatively evaluated through the method. It is drawn that current control loop and line dynamics contribute negative damping, whereas power control loop contributes positive damping. Moreover, the impacts of operating conditions and controller parameters on damping of different elements are analysed. The eigenvalue analyses and electromagnetic transient simulations have verified the theoretical analysis.https://doi.org/10.1049/rpg2.12857phase locked loopspower system stabilityrenewable energy power conversionvoltage‐source convertors |
| spellingShingle | Boyuan Zhao Lei Chen Yong Min Yalou Li Shiyun Xu Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC IET Renewable Power Generation phase locked loops power system stability renewable energy power conversion voltage‐source convertors |
| title | Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC |
| title_full | Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC |
| title_fullStr | Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC |
| title_full_unstemmed | Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC |
| title_short | Corrected complex torque coefficient method for synchronization stability analysis of grid‐connected VSC |
| title_sort | corrected complex torque coefficient method for synchronization stability analysis of grid connected vsc |
| topic | phase locked loops power system stability renewable energy power conversion voltage‐source convertors |
| url | https://doi.org/10.1049/rpg2.12857 |
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