Large-scale integration of distributed generation and widespread use power electronic equipment make quality disturbances (PQDs) more complicated. There are still unsolved problems for the classification multiple (MPQDs) that consist various kinds single disturbances: (1) since difference between contribution degrees every contained disturbance to composite is ignored, logical labels cannot com...

The detection and classification of power quality events that disturb the voltage and/or current waveforms in electrical distribution networks is very important to generate energy deliver this end-user equipment at an acceptable voltage. Various property extraction methods are used determine type disturbances signal. In study, seven distortions including sag, swell, harmonics, sag with swell fl...

Aiming at the problems of noise interference and too many network parameters for power quality disturbances' (PQDs') classification based on deep learning, lightweight convolutional neural combining maximum likelihood Kalman filter continuous wavelet transform is proposed. In this proposed method, disturbed PQD signals are denoised by filter, then PQDs converted to time-frequency diagrams, whic...

Emerging Power Quality Problems and State of The Art Solutions T HIS SPECIAL SECTION is intended to address emerging power quality problems due to integration of largescale photovoltaic and wind systems, concepts of smart grid, vehicle to grid, increased reliance on power electronic devices/equipment in residential, commercial and industrial domains, etc. Further, it aims at providing advanced ...

Voltage and current unbalance problems of power networks due to AC electrified railway systems are studied and their influences such as the voltage unbalance factor and the current negative sequence contribution factor injected to the network are calculated. Several methods can be used for reducing the power quality unbalance problems which have been proposed and the best of them is chosen by c...

This work deals with modeling and simulation of multi bus system using D-STATCOM. Voltage sag is increased by connecting a heavy load. The sag is mitigated using D-STATCOM. The circuit models and simulation results are presented. The Simulation results are compared with the analytical results. KeywordsDistribution Static Synchronous Compensator (D-STATCOM)

With the deregulation of the electric power energy market, providing power quality has become a more important concern of both power suppliers and customers. Customers require better quality with the development of digitally controlled facilities. However, there is not a specific infrastructure to motivate the design of the power system to achieve a specified level of electric power quality. Th...

This paper discusses the Dynamic voltage restorer (DVR) operation and control for Voltage sags compensation. DVR is a series connected power electronic based device that can quickly mitigate the voltage sags in the system and restore the load voltage to the pre-fault value. Voltage sag associated with faults in transmission and distribution systems, energizing of transformers, and starting of l...