A Method of Impedance Reconstruction Based DC-link Oscillation Suppression for Urban Rail Transit Traction System
Due to the mismatch of main circuit parameters and the negative impedance characteristics of inverter-motor system under specific operating conditions, urban rail transit traction system is prone to DC-link voltage oscillation. In order to solve this problem, this paper establishes a characteristic...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Control and Information Technology
2021-01-01
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| Series: | Kongzhi Yu Xinxi Jishu |
| Subjects: | |
| Online Access: | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2021.02.008 |
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| Summary: | Due to the mismatch of main circuit parameters and the negative impedance characteristics of inverter-motor system under specific operating conditions, urban rail transit traction system is prone to DC-link voltage oscillation. In order to solve this problem, this paper establishes a characteristic equation model of traction system, and analyzes the influence of DC-link filter parameters on system stability. For inverter-motor drive system, it proposes an oscillation suppression method based on impedance reconstruction. By compensating d axis and q axis reference voltage signal of controller, negative impedance characteristic of the inverter-motor system is improved so that the system is stable. Simulation and hardware-in-the-loop experiment results show that the suppression strategy can effectively suppress the oscillation and improve the stability of system. |
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| ISSN: | 2096-5427 |