American Journal of Electrical and Electronic Engineering

The interaction effect in aggregation of harmonic currents is investigated. Several approaches including IEC 61000-3-6 recommended method are utilized and compared. A simple practical method is proposed to account for/compensate interaction effect. The proposed technique is computationally simple and does not require the knowledge of current harmonics in each branch. A rectifier is considered and simulated as an example to show the interaction effect and performance of the proposed method.

American Journal of Electrical and Electronic Engineering. 2015, 3(3), 83-87. DOI: 10.12691/ajeee-3-3-4
Pub. Date: August 12, 2015

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Design of Robust PID Power System Stabilizer for Multimachine Power System Using HS Algorithm

by D. K. Sambariya and R. Prasad

Original Research

In this paper, the design of a proportional, derivative and integral (PID) based power system stabilizer (PSS) is carried out using a new Meta heuristic harmony search algorithm (HSA) to optimize the parameters. The design of proposed PID controller is considered with an objective function based on eigenvalue shifting to guarantee the stability of nonlinear plant for a wide range of conditions using HSA. The HSA optimized PIDPSS (HSPIDPSS) controller is applied to the standard IEEE ten-machine thirty nine-bus test power system model in decentralized manner and the performance is compared with a robust fuzzy controller. The robustness is tested by considering four plant conditions with change of active power, active load and faults at different buses of the power system to establish, the superior performance with HSPIDPSS over the FPSS.

American Journal of Electrical and Electronic Engineering. 2015, 3(3), 75-82. DOI: 10.12691/ajeee-3-3-3
Pub. Date: July 23, 2015

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Novel Single-CFOA-based Sinusoidal Oscillator Capable of Absorbing All Parasitic Impedances

by D. K. Srivastava, V. K. Singh and R. Senani

Letter To Editor

Although a large number of single current feedback op-amp (CFOA)-based sinusoidal oscillator circuits have been proposed in the literature, to the best knowledge of the authors, no single-CFOA oscillator configuration has been reported earlier which can absorb all the parasitic impedances of the CFOA in the various external passive elements employed. The major intention of this paper is to report such a circuit. The workability of the proposed circuit has been confirmed by experimental results employing an AD844-type CFOA.

American Journal of Electrical and Electronic Engineering. 2015, 3(3), 71-74. DOI: 10.12691/ajeee-3-3-2
Pub. Date: May 31, 2015

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A Bibliography of the Work Done on Externally-Linear-Internally-Nonlinear Circuits during 1979-2014

by Manoj Kumar Jain, V. K. Singh and Raj Senani

STATE OF THE ART

There is a continued demand of analog circuits which are capable of operating at low supply voltages and have low-power consumption and large dynamic range. There are several techniques of designing circuits satisfying such requirements a majority of which fall into the general category of externally-linear-internally-nonlinear (ELIN) circuits. In this paper, we present a bibliography of ELIN circuits which covers log-domain, exponential state-space domain, square root domain and other related circuits, based upon the work done during 1979 to 2014. It is hoped that this compilation (with a brief overview) should be useful to research scholars, educators, students, practicing engineers and anybody who is interested in knowing about the current state-of-the- art of log domain, translinear and square root domain circuits.

American Journal of Electrical and Electronic Engineering. 2015, 3(3), 64-71. DOI: 10.12691/ajeee-3-3-1
Pub. Date: May 25, 2015

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9270 Views2884 Downloads8 Likes2 Citations