Abstract
For safety critical transportation applications like all-electric ship propulsion systems (SPS), the reliable system operation is definitely the primary concern. In this article, a fault-tolerant back-to-back power converter based on the four-switch three-phase (FSTP) topology is applied to a doubly fed induction machine (DFIM) based all-electric SPS. A power compensation-oriented space vector modulation direct power control (PCSVM-DPC) strategy with dc-bus voltage unbalance elimination is proposed to ride through the single bridge arm open-circuit fault in the source-side converter (SSC) and improve the system dynamic performance simultaneously. Besides, the DFIM-SPS is endowed with excellent steady-state performance by applying the proposed control strategy. The dc-bus voltage deviation is suppressed based on the calculation of active and reactive power compensation terms to increase the dc-bus voltage utilization rate. Moreover, good post-fault system operation performance can be achieved with fast active power and electromagnetic torque tracking speeds. The proposed PCSVM-DPC strategy for the fault-tolerant FSTP SSC based DFIM-SPS is easy to implement without high computational burden. The SVM-DPC method is also presented for the load-side converter. The proposed control strategy is verified by experiments on a 1.5-kW DFIM-SPS experimental platform.
| Original language | English |
|---|---|
| Pages (from-to) | 8716-8726 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 69 |
| Issue number | 9 |
| Early online date | 29 Sept 2021 |
| DOIs | |
| Publication status | Published - Sept 2022 |
Bibliographical note
Publisher Copyright:© 1982-2012 IEEE.
Keywords
- Back-to-back power converter (BTBPC)
- direct power control
- doubly fed induction machine (DFIM)
- fault-tolerant operation
- shipboard propulsion system
- space vector modulation (SVM)