Power quality and line considerations for variable speed AC drives

Shipp, D.D.; Vilcheck, W.

doi:10.1109/28.491490

Cited by 35 publications

(3 citation statements)

References 8 publications

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“…As is known from previous experiments[15], the waveform caused by an m-pulse rectifier has characteristic harmonics of the ( • ± 1)th order. Hence, (12 • ± 1) harmonics are the common harmonics for all three kinds of simulated converters.…”

mentioning

confidence: 70%

Automatic Detection of Voltage Notches using Support Vector Machine

Qi¹,

Zyabkina²,

Martinez³

et al. 2021

REPQJ

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This paper presents a comprehensive framework for voltage notch analysis and an automatic method for notch detection using a nonlinear support vector machine (SVM) classifier. A comprehensive simulation of the notch disturbance has been conducted to generate a diverse database. Based on domain knowledge and properties of power quality disturbances (PQDs), a set of characteristic features is extracted. After feature extraction, a set of most descriptive features has been selected with decision tree (DT) algorithm, and a nonlinear SVM classifier has been trained. Finally, the detection efficiency of the trained model is presented and discussed.

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mentioning

confidence: 70%

Automatic Detection of Voltage Notches using Support Vector Machine

Qi¹,

Zyabkina²,

Martinez³

et al. 2021

REPQJ

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“…In mining industry, a number of silicon-controlled rectifiers (SCRs) or thyristor bridges DC drives are used. Although the gate firing angle of the SCR can be adjusted to control the level of DC link voltage, it generates voltage notches during commutation period [118], [119]. Nowadays, AC drives are replacing DC drives due to their better reliability and efficiency.…”

Section: Input Commutation Notchesmentioning

confidence: 99%

Power Quality Issues of Distorted and Weak Distribution Networks in Mining Industry: A Review

et al. 2019

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Mining is an important industry in many countries including Australia and plays a vital role in their economy. The industry heavily depends on electricity as it employs different types of electrical loads. Consequently, a stable and reliable supply of electricity is vital for running the production smoothly. In this review paper, electrical characteristics of mining power systems are described and common power quality and energy efficiency concerns in these systems are stated and classified. Different types of common power electronics topologies used in the industry are also studied and main requirements for reliable and robust operation of the system are categorized. A comprehensive case study to elaborate power quality challenges in mining distribution network is performed.INDEX TERMS Distorted grid, distribution network, energy efficiency, mining industry, power quality, power system robustness.

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“…The Uninterruptible Power Supplies (UPSs) have been extensively used for critical loads such as computers used for controlling important processes, some medical equipment. The conventional UPS draws harmonic currents (Shipp and Vilcheck, 1996). Due to its non-linear load, nonsinusoidal current is drawn from the utility and harmonics are injected into the utility lines the Total Harmonic Distortion (THD) factor increases to 70% (Chaudhary and Suryawanshi, 2006).…”

Section: Introductionmentioning

confidence: 99%

Harmonics Reduction in Front End Rectifer of Uninterruptible Power Supplies With Active Current Injection

Chandrasekar¹

2014

American Journal of Applied Sciences

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Harmonics are the by-products of modern electronics devices so it is necessary to mitigate the harmonics and offer techniques to mitigation of harmonics. It is greatly hampered by a three phase rectifier used as a front-end ac-to-dc converter in many systems. High power factor is achieved by injecting high-frequency currents into the three-phase rectifier. This study presents the high power factor operation of the converter with reduced total harmonic distortion up to 47.06%. The power quality up gradation is due to highfrequency current injection, at the input of the front-end rectifier. Sinusoidal PWM technique is used for controlling the output voltage. DSP is used for generating the desired gate pulses. The converter has high efficiency, low EMI emissions, high power packing density and suitable for UPS system.

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Power quality and line considerations for variable speed AC drives

Cited by 35 publications

References 8 publications

Automatic Detection of Voltage Notches using Support Vector Machine

Automatic Detection of Voltage Notches using Support Vector Machine

Power Quality Issues of Distorted and Weak Distribution Networks in Mining Industry: A Review

Harmonics Reduction in Front End Rectifer of Uninterruptible Power Supplies With Active Current Injection

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