American Journal of Electrical and Electronic Engineering

Advanced Fault Location Isolation and Supply Restoration (AFLISR) is describing as the smart brain at the control center, using remotely controllable devices to execute the smart decisions. AFLISR application can improve reliability intensely deprived of compromising safety and asset protection. AFLISR systems that automatically detect faults, isolate the impaired portion of the feeder, and restore as plentiful facility as conceivable within seconds as part of their strategy to accomplish a “self-healing” grid. One problem with these systems is that service restoration is often blocked due to heavy loading on backup feeders. The next generation of automatic restoration systems will yield improvement of further advanced control services that are existence installed as part of the smart grid. After encountering a load transfer limit, the automatic restoration system may initiate schedules to free up capacity on the pretentious feeders so enabling the load transfer to continue. Capacity issue strategies can embrace instigation of petition response schedules, initiation of CVR, and impermanent reduction of fast charging actions for electric vehicles.

American Journal of Electrical and Electronic Engineering. 2015, 3(1), 17-21. DOI: 10.12691/ajeee-3-1-4
Pub. Date: March 24, 2015

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An Approach for Fast BCD Addition

by Parag K. Lala

Original Research

This paper presents a technique for fast addition of multi-digit BCD numbers. The addition of all columns can be performed simultaneously, and the carry values are utilized only in the final stage of the addition. Thus the traditional carry propagation process is drastically reduced, hence speeding up the addition process. The addition technique is used in the summation of partial products generated during a new multiplication approach proposed in the paper resulting in a faster multiplication.

American Journal of Electrical and Electronic Engineering. 2015, 3(1), 13-16. DOI: 10.12691/ajeee-3-1-3
Pub. Date: March 19, 2015

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Combined Effect of Block interleaving and FEC on BER Performance of OFDM based WiMAX (IEEE 802.16d) System

by Arun Agarwal and Saurabh N. Mehta

Original Research

In this World of Digital era the demand of mobile Internet and wireless multimedia applications are growing faster than ever. To satisfy the user requirements and to overcome the limitations of existing wireless technologies, have led the researchers to come up with more advanced and efficient technology. Orthogonal Frequency Division Multiplexing (OFDM) based WiMAX (Worldwide Interoperability for Microwave Access ) is the outcome in this direction which promises to solve the last mile access technology to provide high speed internet access in the residential as well as small and medium sized enterprise sectors. In this paper we have analyzed the effect of Block Interleaving on the Bit Error Rate (BER) performance of the WiMAX Physical layer baseband system conforming to the parameters established by IEEE 802.16 standards for different digital modulation schemes. From the analysis it was observed that addition of interleaving with forward error correction (FEC) improves the system performance by reducing the burst errors during transmission.

American Journal of Electrical and Electronic Engineering. 2015, 3(1), 4-12. DOI: 10.12691/ajeee-3-1-2
Pub. Date: March 11, 2015

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New Very Low Frequency Oscillator Using only a Single CFOA

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

Letter To Editor

Some time back, Elwakil presented a systematic method of realizing Very Low frequency (VLF) oscillators using current feedback operational amplifiers (CFOA) and demonstrated that the classical Wienbridge oscillator, employing the concept of composite resistor (containing two positive and one negative resistance) can be tailored to generate VLF oscillations. The circuit proposed by Elwakil, however, required two CFOAs along with six resistors and two capacitors. The object of this paper is to report a new VLF oscillator circuit which, in contrast to Elwakil’s circuit, requires onlya single CFOA. The workability of the new circuit has been demonstrated by experimental results using commercially available AD844type CFOAs.

American Journal of Electrical and Electronic Engineering. 2015, 3(1), 1-3. DOI: 10.12691/ajeee-3-1-1
Pub. Date: February 01, 2015

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