Analysis of stator current of induction motor used in transport system at single phasing by measuring phase angle, symmetrical components, Skewness, Kurtosis and harmonic distortion in Park plane

Abstract

Stator current of induction motor is analysed at single phasing by measuring phase angle, symmetrical components, Skewness, Kurtosis and harmonic distortion in Park plane. Diagnosis of single phasing of induction motor has been achieved by sequence components and stator current based pattern assessment. Distinct phase shift from 120°to 180°is observed between healthy phases. Patterns are formed using line currents and single phasing is assessed by using rule sets developed from features extracted from those patterns. Experimental result agrees with rule set and result obtained by assessment using sequence components. Then assessment is done by analysing wavelet decomposition based Skewness and Kurtosis of stator current in Park plane. At last, area based approach is used for assessment of single phasing and different distortion factors because of harmonics in Park plane are assessed. Accuracy increases with the increase of sampling rate of data acquisition system and use of Park plane has reduced computation effort by two-thirds. Thus single phasing is detected by sequence components supported by pattern formation and feature extraction and then harmonics during single phasing are assessed by wavelet decomposition and area-based approach in Park plane.

A New Design Optimization Method for Permanent Magnet Synchronous Linear Motors

“…The sinusoidal characteristic of the new method is evidently promoted relative to the Taguchi method. The comparative results of the harmonic amplitude after spectrum analysis [34,35] are shown in Figure 12 and Table 11. Due to the star connection of coils, there is no 3rd harmonic, The experimental results show that the harmonics of the 5th, 7th, 9th, and 11th are restrained by 0.76%, 0.33%, 0.32%, and 0.18%, respectively, which indicates that the harmonic content significantly decreases.…”

“…The sinusoidal characteristic of the new method is evidently promoted relative to the Taguchi method. The comparative results of the harmonic amplitude after spectrum analysis [34,35] are shown in Figure 12 and Table 11. Due to the star connection of coils, there is no 3rd harmonic.…”

Fault analysis in solar–wind microgrid using multi‐resolution analysis and Stockwell transform‐based statistical analysis

“…MRA-based harmonic determination has been done in power system signals [29]. Single phasing detection in induction motors has been done for computing symmetrical components, skewness and kurtosis values in the Park plane [30]. A non-linear model-based real-time estimation of solar irradiance and module temperature measurement have been carried out at MPPT condition [31].…”

Utilisation of skewness of wavelet‐based approximate coefficient in walking speed assessment

“…Ambulatory of three-dimensional foot displacement has been measured during treadmill walking using wearable wireless ultrasonic sensor network [15]. Very recently, some new methods have been introduced for signal assessment [16] and statistical parameters like kurtosis, skewness and so on are becoming very popular for non-stationary signal analysis [17,18]. These parameters have been used for electrical signal analysis which is useful in measurement, condition monitoring, fault diagnosis and control.…”