Parameter Design and Stability Analysis of Double-Loop Control for High-speed EMU 4QS-Converter
Double-grid-frequency fluctuation exists in DC-link voltage of EMU 4QS-converter whose grid-side current contains much ripple of equivalent switching frequency. RC circuit filters and digital filters were usually employed for signal conditioning of voltage and current. However, improper filter param...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2020-03-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2020.02.006 |
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| Summary: | Double-grid-frequency fluctuation exists in DC-link voltage of EMU 4QS-converter whose grid-side current contains much ripple of equivalent switching frequency. RC circuit filters and digital filters were usually employed for signal conditioning of voltage and current. However, improper filter parameter will lead to unstable control. In order to improve control stability of 400 km/h high-speed EMU, firstly, the parameter design principle of DC-link voltage and current double-loop control for a 4QS-converter was introduced. Secondly, the effects of voltage and current signal conditioning filters on the stability of the double-loop control were analyzed, and the necessary conditions of system stable were revealed. Finally, simulation results based on 400 km/h high-speed EMU verifiedied the correctness and effectiveness of the theoretical analysis. |
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| ISSN: | 1000-128X |