A DC-Link Oscillation Control Method for Subway Train Traction System
When DC link voltage of metro traction system is oscillating, performance of the metro vehicle is seriously deteriorated. In order to solve this problem, DC link of the metro traction system was studied, and the converter and the motor were equivalent to a powervariable load of DC link, and a nonlin...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Control and Information Technology
2018-01-01
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| Series: | Kongzhi Yu Xinxi Jishu |
| Subjects: | |
| Online Access: | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2018.01.006 |
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| Summary: | When DC link voltage of metro traction system is oscillating, performance of the metro vehicle is seriously deteriorated. In order to solve this problem, DC link of the metro traction system was studied, and the converter and the motor were equivalent to a powervariable load of DC link, and a nonlinear second-order model was obtained. After discussing the possible equilibrium operating points of the DC Link, a second-order linear model of DC link was derived by small signal analysis. Based on the stability analysis of the secondorder linear model, it pointed out that increasing the load power would lead to instability and proposed a state feedback control to stabilize the system. By analyzing the root locus of the control system, it deduced the rule of adjusting the state feedback gain which can fully guarantee the stability of DC link. Numerical simulation and HIL simulation proved the correctness and validity of the proposed control method. |
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| ISSN: | 2096-5427 |