Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance
Voltage-source rectifiers (VSRs) have been widely used in modern power grids. The inductive grid impedance of the power grid poses a serious threat to the stability of the VSR. To guarantee the stability of the VSR, the inductive grid impedance must be considered when designing the controller parame...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Open Journal of the Industrial Electronics Society |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9565399/ |
| _version_ | 1818691007981551616 |
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| author | Kai Wang Xibo Yuan Shanglong Li Xiaojie Wu |
| author_facet | Kai Wang Xibo Yuan Shanglong Li Xiaojie Wu |
| author_sort | Kai Wang |
| collection | DOAJ |
| description | Voltage-source rectifiers (VSRs) have been widely used in modern power grids. The inductive grid impedance of the power grid poses a serious threat to the stability of the VSR. To guarantee the stability of the VSR, the inductive grid impedance must be considered when designing the controller parameters. In this article, a stability-margin-oriented design method for the controller parameters of the VSR in the weak power grid with an inductive grid impedance is proposed, where the inductive impedance value can be significant in practice. Firstly, the proportional gain of the dc-link voltage controller is designed based on the Routh Criterion to obtain the required gain margin. Then, regarding the lack of the phase margin, the grid-voltage feedforward gain is designed for improving the phase margin based on the singular value of the system. Furthermore, it is found that the lack of the phase margin is very serious in the system with multiple VSRs in parallel. Therefore, the stability margin of the system when connecting multiple VSRs with the designed parameters is investigated, and the effectiveness of the proposed design method in this article on guaranteeing the phase margin and the gain margin of the system is confirmed. The proposed design method in this article has the merit that it can guarantee the stable operation of the multiple VSRs in parallel which are connected to the weak power grids with various short circuit ratios. Moreover, the dynamic response of the VSR with the designed parameters is explored, and the stability of using the load power feedforward for improving the dynamic response of the VSR connected to the power grid with a large impedance is confirmed. Simulation and experimental results have been provided, the effectiveness of the design method proposed in this article. |
| first_indexed | 2024-12-17T12:35:03Z |
| format | Article |
| id | doaj.art-7a46b4269ecc4d25aeea6f674f871376 |
| institution | Directory Open Access Journal |
| issn | 2644-1284 |
| language | English |
| last_indexed | 2024-12-17T12:35:03Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of the Industrial Electronics Society |
| spelling | doaj.art-7a46b4269ecc4d25aeea6f674f8713762022-12-21T21:48:21ZengIEEEIEEE Open Journal of the Industrial Electronics Society2644-12842021-01-01251152710.1109/OJIES.2021.31188449565399Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive ImpedanceKai Wang0https://orcid.org/0000-0001-8563-4739Xibo Yuan1https://orcid.org/0000-0002-8249-5857Shanglong Li2Xiaojie Wu3https://orcid.org/0000-0001-8352-5686School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, ChinaDepartment of Electrical and Electronic Engineering, the University of Bristol, Bristol, U.K.School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, ChinaSchool of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, ChinaVoltage-source rectifiers (VSRs) have been widely used in modern power grids. The inductive grid impedance of the power grid poses a serious threat to the stability of the VSR. To guarantee the stability of the VSR, the inductive grid impedance must be considered when designing the controller parameters. In this article, a stability-margin-oriented design method for the controller parameters of the VSR in the weak power grid with an inductive grid impedance is proposed, where the inductive impedance value can be significant in practice. Firstly, the proportional gain of the dc-link voltage controller is designed based on the Routh Criterion to obtain the required gain margin. Then, regarding the lack of the phase margin, the grid-voltage feedforward gain is designed for improving the phase margin based on the singular value of the system. Furthermore, it is found that the lack of the phase margin is very serious in the system with multiple VSRs in parallel. Therefore, the stability margin of the system when connecting multiple VSRs with the designed parameters is investigated, and the effectiveness of the proposed design method in this article on guaranteeing the phase margin and the gain margin of the system is confirmed. The proposed design method in this article has the merit that it can guarantee the stable operation of the multiple VSRs in parallel which are connected to the weak power grids with various short circuit ratios. Moreover, the dynamic response of the VSR with the designed parameters is explored, and the stability of using the load power feedforward for improving the dynamic response of the VSR connected to the power grid with a large impedance is confirmed. Simulation and experimental results have been provided, the effectiveness of the design method proposed in this article.https://ieeexplore.ieee.org/document/9565399/DC-AC power convertersinductive impedanceparameter designpower system stabilityrouth Criterionsingular value |
| spellingShingle | Kai Wang Xibo Yuan Shanglong Li Xiaojie Wu Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance IEEE Open Journal of the Industrial Electronics Society DC-AC power converters inductive impedance parameter design power system stability routh Criterion singular value |
| title | Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance |
| title_full | Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance |
| title_fullStr | Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance |
| title_full_unstemmed | Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance |
| title_short | Stability-Margin-Oriented Key Parameter Design for Voltage-Source Rectifiers in Weak Power Grids With Inductive Impedance |
| title_sort | stability margin oriented key parameter design for voltage source rectifiers in weak power grids with inductive impedance |
| topic | DC-AC power converters inductive impedance parameter design power system stability routh Criterion singular value |
| url | https://ieeexplore.ieee.org/document/9565399/ |
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