power transformers are key components in electrical power supplies and their failure could cause severe consequences on continuity of service and also generates substantial costs. identifying problems at an early stage, before catastrophic failure occurs, is a great benefit for reliable operation of power transformers. frequency response analysis (fra) is a new, well-known and powerful diagnost...

The purpose of this paper is to review the state of the art techniques in signal processing for automatic classification of power quality events and to give a sign of the next trends. The time when power quality monitoring equipment just takes pictures of raw waveforms has gone. Nowadays, power quality monitoring systems are becoming able to identify and classify events automatically in order t...

A design of power quality monitoring and analysis platform based on the virtual instrument technology is proposed which aims at the key issues affecting quality rural power grids. This article discusses the typical algorithm of harmonic analysis, voltage deviation calculation and unbalance in threephase calculation. Completing software design of power quality monitoring and analysis platform ba...

Concerns in identifying and diagnosing power quality related disturbances in power line communication (PLC) network has enforced special requirement for power quality monitoring equipment and creates a need for sophisticated software to analyze the monitored data. Most of the existing monitoring equipment are too expensive, they are neither handy nor capable of detecting the disturbances in rea...

production of electricity for promotion of people’s welfares is inevitable.there are about 54000 mw of various power plants in iran. the type of power plants includes gas, steam, combined, hydro and a very minute amount of wind mills. the per capita electricity production is about 2200 kwh. power plants can impose adverse environmental impacts during construction and utilization phases. envir...

Most of the modern industrial power quality monitoring systems are used for the pre-fault alarming and load flow analysis. In this paper, we present an Artificial Neural Network (ANN) model for intelligent utilization of power and for monitoring the power quality. The proposed ANN system will assist the conventional monitoring systems with added intelligence. For on-line monitoring, voltage and...

power transformers provide a vital link between the generation and distribution of produced energy. such static equipment is subjected to abuse during operation in generation and distribution stations and leads to catastrophic failures. this paper reviewed the techniques in the field of condition monitoring of power transformers in recent years. transformer monitoring and diagnosis are the effe...