Open-Circuit Fault Diagnosis in Shunt Active Power Filters with No Additional Sensors
- Resource Type
- Conference
- Authors
- Liu, Yujia; han, Pengcheng; He, Xiaoqiong; Shu, Zeliang; Gao, Shibin
- Source
- 2020 15th IEEE Conference on Industrial Electronics and Applications (ICIEA) Industrial Electronics and Applications (ICIEA), 2020 15th IEEE Conference on. :1389-1394 Nov, 2020
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Fault diagnosis
Fault detection
Active filters
Harmonic analysis
Real-time systems
Sensors
Power harmonic filters
open-circuit fault
active power filters
neutral-point-clamped
- Language
- ISSN
- 2158-2297
A real-time fault diagnosis method for neutral-point-clamped (NPC) active power filters (APF) is proposed. According to the different relationships between the APF’s harmonic current and reference voltage under normal condition and fault condition, the fault diagnosis algorithm can detect and locate the open-circuit faults (OCF) with no additional hardware or sensors. The selection basis of the two thresholds required by the fault diagnosis algorithm is also analyzed in the article. Fault detection can be achieved in just a few sample periods (in favorable conditions). All the signals used in this algorithm have already been employed in the APF’s controller and only addition and comparison are required in the algorithm, which is very simple. The efficiency of the proposed algorithm is verified by the simulation results.