Control Method for Fault-Tolerant Active Power Filters
- Resource Type
- Academic Journal
- Authors
- Chenyu Zhang; Jianyong Zheng; Jun Mei; Kai Deng; Fuju Zhou
- Source
- JOURNAL OF POWER ELECTRONICS. 2015-05 15(3):796-805
- Subject
- Active Power Filter (APF)
DC-side voltage
Fault tolerant
Hysteresis control
Space vector modulation
- Language
- Korean
- ISSN
- 1598-2092
2093-4718
New direct and indirect current control methods for a fault-tolerant active power filter topology are presented in this paper. Since a three-phase four-switch topology has a phase bridge current which cannot be directly controlled, a hysteresis control method in the α-β plane which controls the three-phase current in the two-phase stationary coordinate system is proposed. The improved SVPWM algorithm is able to eliminate the operation of the trigonometric functions in the traditional algorithm by rotating the α-β coordinates and alternating the sequence of the output vectors, which in turn simplifies the algorithm and reduces the switching frequency. The selection of the DC-side reference voltage and DC-side capacitor equalization strategy are also discussed. Simulation and experiments demonstrate that the proposed control method is correct and feasible.