This paper presents pattern recognition of time series data and subsequent temporal data mining of power signal disturbance events that occur frequently in power distribution networks using multiresolution S-transform and Fuzzy neural inference system . This system yields relevant features, which are used in a Fuzzy expert system to separate the transient time series data and steady state short...

Custom Power devices like Dynamic voltage restorer and STATCOM are normally employed as a solution for mitigation of power quality problems like voltage sag and swell. In this paper new voltage sag compensators based on an autotransformer and an IGBT switched by PWM technique and Hysteresis Voltage Control (HVC) method are compared. These two schemes are able to recognize the voltage sag condit...

This paper presents a new simulation method for performing equipment sensitivity study during power quality events. Power quality waveform events such as voltage sags, swells, transients, etc. may cause sensitive loads to trip or mis-operate. For better coordination between the system and the equipment, it is necessary that the effects of specific events on the equipment behavior be thoroughly ...

Understanding the power draw of mobile devices has received considerable attention, as energy is the limiting resource in these platforms. In the absence of hardwaremeasurements wemust resort tomodels that predict power usage based on events seen by the OS. e accuracy of these models depends on the type of model and on the set of events used as inputs. By looking in detail at the power draw of ...

aim and background: it is estimated that coronary heart diseases (chd) will be the major cause of mortality by the year 2020. the traditional factors such as age, genetics, smoking and obesity, account only half of the variance in chd.  therefore, regarding increasing concern about the psychosocial factors, the purpose of present study was to evaluate the role of personality, stress and social ...

AC railway traction loads are usually huge single phase loads. As a result, a significant amount of Negative Sequence Current (NSC) is injected into utility grid. Moreover, harmonics and consumption ofreactive power are further power quality problems that the supply network is encountering. In this paper, acompensation strategy with the aid of Railway Power Conditioner (RPC) is proposed to over...

Voltage sags are one of the most concerned power quality events in the modern power systems as they often lead to tripping or mis-operation of the customer equipment. The coordination study between the system and the equipment helps alleviate such nuisances. This paper describes new software developments aimed at automated voltage sag characterization and equipment behavior analysis. The propos...