This paper presents an alternative method based on artificial neural network, which is used to obtain the reference currents for harmonic current suppression and reactive power compensation in a shunt active power filter applied to three-phase four-wire system. The neural network consists of a multilayer perceptron, which is trained to estimate the peak amplitude of the load fundamental compone...

Inrush currents in transformers are non-sinusoidal, high magnitude currents generated due to flux saturation in the core during energization. For protection purpose, in this paper an efficient method for detection of inrush current in distribution transformer based on wavelet transform is presented. Using this method inrush current can be discriminated from the other switching transients such a...

This article presents a current-mode quadrature oscillator. The proposed oscillator can provide 2 sinusoidal output currents with 90 0 phase difference. It also provides high output impedances that make the circuit able to directly drive load without additional current buffer. The condition of oscillation and frequency of oscillation can be controlled independently and electronically by adjusti...

It is well understood that induction motors draw higher currents during their starting operations than is the case under full load running conditions. Since the early days of induction motor availability, starting methods other than Direct-on-Line have been used, and in some cases mandated by Utilities, to reduce the effect of these high starting currents on the electrical distribution network....

Uridine 5'-triphosphate (UTP), a potent vasoconstrictor that activates phospholipase C, shifted Ca(2+) signaling from sparks to waves in the smooth muscle cells of rat cerebral arteries. UTP decreased the frequency of Ca(2+) sparks and transient Ca(2+)-activated K(+) (K(Ca)) currents and increased the frequency of Ca(2+) waves. The UTP-induced reduction in Ca(2+) spark frequency did not reflect...

The matrix converter-based IPMSM drive has 360 Hz virtual DC-bus voltage variations which produce severe stator harmonic currents. To solve this problem, a speed-loop classical periodic controller and two current-loop controllers, including selective controller, are proposed in paper. By using the methods, currents obviously reduced speed responses of clearly improved. A detailed analysis is di...

As a central component of any existing AC substation, disconnector switches are responsible for providing isolation between grid-connected and safely approachable sections of bus. Additionally, they can provide the capability of transferring load currents between different busses. Due to the excellent performance history in AC, possible challenges for disconnector switches in future HVDC substa...

This paper gives a new insight into the concept of load compensation using shunt active filter (SAF) under ideal and non-ideal source voltage conditions. A novel approach based on an improved instantaneous active and reactive current component method is proposed. The performance of the proposed control strategy has been compared with instantaneous reactive power theory, symmetrical component th...

In this paper, a modification of a parallel active power filter (APF) control is presented. Its purpose is to decrease the cost of the hardware by minimizing the number of current sensors, normally present in conventional topologies. The approach employs the direct current control (DCC), a method for predictive control of currents in polyphase systems, developed by the authors. Since in traditi...

L. M. Tolbert, Y. Xu, J. Chen, and J. N. Chiasson are with the Department of Electrical and Computer Engineering, The University of Tennessee, Knoxville, TN 37996-2100 USA (e-mail: [email protected], [email protected], [email protected], [email protected]). F. Z. Peng is with the Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48824-1226 USA (e-mail: fzpeng@m...