Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults
Abstract The stability of a voltage source converters (VSC) system based on phase-locked loop (PLL) is very important issue during asymmetric grid faults. This paper establishes a transient synchronous stability model of a dual-sequence PLL-based VSC system during low voltage ride-through by referri...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-07-01
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| Series: | Protection and Control of Modern Power Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s41601-023-00302-0 |
| _version_ | 1797769409972928512 |
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| author | Yi Luo Jun Yao Zhaoyang Chen Sen Huang Shiyue Chen Qi Zhang Zhentao Qin |
| author_facet | Yi Luo Jun Yao Zhaoyang Chen Sen Huang Shiyue Chen Qi Zhang Zhentao Qin |
| author_sort | Yi Luo |
| collection | DOAJ |
| description | Abstract The stability of a voltage source converters (VSC) system based on phase-locked loop (PLL) is very important issue during asymmetric grid faults. This paper establishes a transient synchronous stability model of a dual-sequence PLL-based VSC system during low voltage ride-through by referring to the equivalent rotor swing equation of synchronous generators. Based on the model, the synchronization characteristics of the VSC system under asymmetric grid faults are described, and the interaction mechanisms, as well as the transient instability phenomena of positive and negative sequence PLL during asymmetric faults are explained. Using the equal area criterion, the influences of sequence control switching action, detection delay, and interaction between the positive and negative sequence PLL on the transient synchronous stability of the VSC system are analyzed, respectively. In addition, a transient stability assessment criterion based on the critical fault clearance angle and time and an enhancement control strategy based on the improved positive and negative sequence PLL are proposed. Finally, the analytical results are validated through simulation and experiments. |
| first_indexed | 2024-03-12T21:08:38Z |
| format | Article |
| id | doaj.art-09b7e54b78f741348fed9d265a442bd8 |
| institution | Directory Open Access Journal |
| issn | 2367-2617 2367-0983 |
| language | English |
| last_indexed | 2024-03-12T21:08:38Z |
| publishDate | 2023-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Protection and Control of Modern Power Systems |
| spelling | doaj.art-09b7e54b78f741348fed9d265a442bd82023-07-30T11:18:13ZengSpringerOpenProtection and Control of Modern Power Systems2367-26172367-09832023-07-018111710.1186/s41601-023-00302-0Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faultsYi Luo0Jun Yao1Zhaoyang Chen2Sen Huang3Shiyue Chen4Qi Zhang5Zhentao Qin6State Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing UniversityState Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing UniversityState Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing UniversityState Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing UniversityState Grid Changzhou Power Supply CompanyState Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing UniversityState Key Laboratory of Power Transmission Equipment and System Security and New Technology, School of Electrical Engineering, Chongqing UniversityAbstract The stability of a voltage source converters (VSC) system based on phase-locked loop (PLL) is very important issue during asymmetric grid faults. This paper establishes a transient synchronous stability model of a dual-sequence PLL-based VSC system during low voltage ride-through by referring to the equivalent rotor swing equation of synchronous generators. Based on the model, the synchronization characteristics of the VSC system under asymmetric grid faults are described, and the interaction mechanisms, as well as the transient instability phenomena of positive and negative sequence PLL during asymmetric faults are explained. Using the equal area criterion, the influences of sequence control switching action, detection delay, and interaction between the positive and negative sequence PLL on the transient synchronous stability of the VSC system are analyzed, respectively. In addition, a transient stability assessment criterion based on the critical fault clearance angle and time and an enhancement control strategy based on the improved positive and negative sequence PLL are proposed. Finally, the analytical results are validated through simulation and experiments.https://doi.org/10.1186/s41601-023-00302-0Voltage source converters (VSC)Asymmetric grid faultsDual-sequence PLLTransient synchronous stabilityAssessment criterionEnhancement control strategy |
| spellingShingle | Yi Luo Jun Yao Zhaoyang Chen Sen Huang Shiyue Chen Qi Zhang Zhentao Qin Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults Protection and Control of Modern Power Systems Voltage source converters (VSC) Asymmetric grid faults Dual-sequence PLL Transient synchronous stability Assessment criterion Enhancement control strategy |
| title | Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults |
| title_full | Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults |
| title_fullStr | Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults |
| title_full_unstemmed | Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults |
| title_short | Transient synchronous stability analysis and enhancement control strategy of a PLL-based VSC system during asymmetric grid faults |
| title_sort | transient synchronous stability analysis and enhancement control strategy of a pll based vsc system during asymmetric grid faults |
| topic | Voltage source converters (VSC) Asymmetric grid faults Dual-sequence PLL Transient synchronous stability Assessment criterion Enhancement control strategy |
| url | https://doi.org/10.1186/s41601-023-00302-0 |
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