An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System
The gains of phase-locked-loop (PLL) have significant impacts on the power transfer limits for the voltage source converter (VSC) connected to weak AC system. Therefore, in this paper, an improved PLL control, respectively, with alternative damping factors for rectifier and inverter is proposed. Fir...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Control Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/9537342 |
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| _version_ | 1832554837091287040 |
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| author | Bin Yuan Jianzhong Xu Chengyong Zhao Yijia Yuan |
| author_facet | Bin Yuan Jianzhong Xu Chengyong Zhao Yijia Yuan |
| author_sort | Bin Yuan |
| collection | DOAJ |
| description | The gains of phase-locked-loop (PLL) have significant impacts on the power transfer limits for the voltage source converter (VSC) connected to weak AC system. Therefore, in this paper, an improved PLL control, respectively, with alternative damping factors for rectifier and inverter is proposed. First, it is proved that the impedance angle of AC system has a great impact on the small-signal stability of the VSC system. With the same variation tendency of Thévenin equivalent resistance, the limits of power transmission are changing in opposite trends for rectifier and inverter. Second, the improved PLL with alternative damping factors is proposed based on the participation factor analysis. Third, the optimal damping factors of the improved PLL control for rectifier and inverter are calculated. Simulations and calculations validated the following three conclusions: (1) in rectifying operation, the equivalent system resistance has a negative impact on the stability of the system and this is not the case for inverting operation; (2) adding the alternative damping factors to PLL control shows similar results compared with changing the impedance angle of AC system; (3) the proposed optimal damping factors of PLL can effectively extend the power transfer limits under both rectifier and inverter modes. |
| format | Article |
| id | doaj-art-607bfcd49e9740c7ad92f355967296d0 |
| institution | Kabale University |
| issn | 1687-5249 1687-5257 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Control Science and Engineering |
| spelling | doaj-art-607bfcd49e9740c7ad92f355967296d02025-02-03T05:50:22ZengWileyJournal of Control Science and Engineering1687-52491687-52572016-01-01201610.1155/2016/95373429537342An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC SystemBin Yuan0Jianzhong Xu1Chengyong Zhao2Yijia Yuan3State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, ChinaThe gains of phase-locked-loop (PLL) have significant impacts on the power transfer limits for the voltage source converter (VSC) connected to weak AC system. Therefore, in this paper, an improved PLL control, respectively, with alternative damping factors for rectifier and inverter is proposed. First, it is proved that the impedance angle of AC system has a great impact on the small-signal stability of the VSC system. With the same variation tendency of Thévenin equivalent resistance, the limits of power transmission are changing in opposite trends for rectifier and inverter. Second, the improved PLL with alternative damping factors is proposed based on the participation factor analysis. Third, the optimal damping factors of the improved PLL control for rectifier and inverter are calculated. Simulations and calculations validated the following three conclusions: (1) in rectifying operation, the equivalent system resistance has a negative impact on the stability of the system and this is not the case for inverting operation; (2) adding the alternative damping factors to PLL control shows similar results compared with changing the impedance angle of AC system; (3) the proposed optimal damping factors of PLL can effectively extend the power transfer limits under both rectifier and inverter modes.http://dx.doi.org/10.1155/2016/9537342 |
| spellingShingle | Bin Yuan Jianzhong Xu Chengyong Zhao Yijia Yuan An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System Journal of Control Science and Engineering |
| title | An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System |
| title_full | An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System |
| title_fullStr | An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System |
| title_full_unstemmed | An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System |
| title_short | An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System |
| title_sort | improved phase locked loop control with alternative damping factors for vsc connected to weak ac system |
| url | http://dx.doi.org/10.1155/2016/9537342 |
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