NDLI: ANN design of multiple open-switch fault diagnosis for three-phase PWM converters

Content Provider	IET Digital Library
Author	Kim, Won Jae Kim, Sang Hoon
Abstract	In this paper, Artificial Neural Networks (ANNs) for diagnosing multiple open-switch faults in three-phase PWM (Pulse Width Modulation) converters are designed. For single and double open-switch faults in the converters, there are 21 types of fault modes, causing distorted phase currents. Since these abnormal currents can induce secondary faults in peripherals, the open-fault diagnosis is essentially required. In this paper, a two-step technique based on ANNs is utilized for the diagnosis of the multiple open-switch fault. First, dc and harmonic components of the currents are extracted by using an ADALINE (Adaptive Linear Neuron). In the first step, the ANN categorizes fault modes into six sectors by using dc components in the three-phase plane. In the second step, the ANN localizes fault modes by using dc components and the ratio of d–q axes currents THDs (Total Harmonics Distortions) in each sector. Especially, both switches open-faults in the same legs are localised by counting the sampled zero current of the fault currents. The proposed two-step technique allows a simple design of the ANNs for the diagnosis, and a short execution time about 22 s. Simulations and experiments for a 3.7 kW three-phase PWM converter confirmed the validity of the proposed diagnostic method.
Starting Page	4490
Ending Page	4497
Page Count	8
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 19, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/19
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2020.0795
Journal	IET Power Electronics
Publisher Date	2020-12-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Abnormal Currents ANN Design Currents THDs DC Component Fault Current Fault Diagnosis Fault Mode Harmonic Component Harmonic Distortion Harmonics Component Multiple Open-switch Fault Multiple Open-switch Fault Diagnosis Neural Nets Open-fault Diagnosis Power Engineering Computing PWM Invertors PWM Power Converter Sampled Zero Current Secondary Fault Stationary D–q Axes Currents Switched Mode Converter Switching Converter Three-phase Pulse-width Modulation Converter Three-phase PWM Converter Time 22.0 Mus Total Harmonics Distortion Two-step Technique
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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