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Durg, India
Durg, India
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Goel N.,SSGI | Patel R.N.,SSGI | Chacko S.,MANIT
International Conference on Electrical Power and Energy Systems, ICEPES 2016 | Year: 2017

Over the past years many kind of control techniques are proposed for induction motor drives. Among them DTC has gained more importance due to fast dynamic response and simple control structures. However it has disadvantage of high ripples in torque and slow response because of hysteresis controllers in torque and flux loop at low speed. To improve the performance of DTC (Direct Torque Control) and to reduce the torque ripples, DTC based Fuzzy logic controller is proposed in this paper. The simulation is carried out using MATLAB and compares the proportional integral (PI) controller tuned with genetic algorithm (GA) and in DTC Fuzzy Logic is implemented and simulated results are shown. © 2016 IEEE.


Warathe S.,Government Polytechnic | Patel R.N.,SSGI
ICACCS 2015 - Proceedings of the 2nd International Conference on Advanced Computing and Communication Systems | Year: 2015

Six-phase transmission line is an alternative solution for increasing the power transmission capability of overhead power transmission lines over existing rights of way. Double circuit three phase lines can be converted to six-phase transmission line. The idea of this new technique is very useful, but there are some protection problems due to complexity of the network. The modern Digital Signal Processor (DSP) embedded with numerical relays can improve the protection operation of the relays in six phase transmission lines. The numerical relays perform fast computing and process the signal with higher accuracy. This work presents new algorithm for numerical relay over current protection in a six phase transmission line. The numerical relay is simulated and tested using PSCAD, for single line to ground and three phase to ground faults on a six phase transmission line in a model system. It was observed that the numerical relay gives the best solution for complicated six phase transmission line protection. © 2015 IEEE.


Warathe S.,Government Polytechnic | Patel R.N.,SSGI
ICACCS 2015 - Proceedings of the 2nd International Conference on Advanced Computing and Communication Systems | Year: 2015

A major grid disturbance occurred in the Northern grid of Indian power grid on 30th July 2012, causing a blackout in northern region. The main cause was the malfunctioning of distance relay due to power swing, weak interregional corridor and multiple outage of lines. In this paper a power swing is compensated by thyristor controlled series capacitor (TCSC) to prevent the unnecessary tripping of line due to power swing and avoid cascading tripping and unforeseen blackout. The power swing is compensated by installation of TCSC at optimum location and controlling the impedance of line by changing its reactance; the oscillation is also damped out by TCSC. The distance relay used for power swing protection does not issue the trip command due to power swing compensation. The TSCS model is simulated for power swing compensation and gives the expected results and prevents the blackout in electricity grid. This paper describes the compensation technique for mho relay to protect the transmission line under power swing. © 2015 IEEE.


Kumar A.,SSGI | Sharma R.,SSGI | Chacko S.T.,SSGI
International Journal of Control Theory and Applications | Year: 2015

Conventionally for high performance industrial drives, DC machines are used. With the development in the field of Power Electronics, the same dynamic performance can be obtained for induction motor using vector controlled techniques. The Indirect vector control of an Induction motor is an advanced control strategy in the field of adjustable speed drives. The control strategy of Indirect vector control is simple with one PI controller in the outer speed loop. There are several methods which are used to tune the parameter values of the controller. The tuned parameter so obtained may not perform satisfactorily for variable drive operating condition. In this paper the gains of PI controller are optimized with the help of Evolutionary Algorithm to enhance the performance of Induction motor drive. © 2015, International Science Press.


Sinha S.K.,Galgotias University | Patel R.N.,SSGI | Prasad R.,Indian Institute of Technology Roorkee
2011 International Conference on Recent Advancements in Electrical, Electronics and Control Engineering, IConRAEeCE'11 - Proceedings | Year: 2011

In this work applications of Flexible AC Transmission System (FACTS) devices have been used in Automatic Generation Control (AGC) to improve the performance such as oscillation damping of transient response of power system in deregulated environment. The oscillations in frequency, tie power, generated power etc. are compared with conventional integral controller and FACTS devices. The responses improve further when Fuzzy controller is used in place of integral controller with FACTS devices connected to the system. © 2011 IEEE.


Sonika,CSIT | Neema D.D.,CIT | Patel R.N.,SSGI
ICACCS 2015 - Proceedings of the 2nd International Conference on Advanced Computing and Communication Systems | Year: 2015

This paper presents the design of a 16bit Sigma Delta Digital to Analog converter for audio applications. Sampling rate conversion plays a predominant role in the signal processing and has a strong determination on the overall complexity and cost of efficient digital to analog Sigma Delta converter. In this paper a technique to examine filter architectures that can be effectively applied in the design of interpolator is presented. In addition a cascade multi bit design of sigma delta Modulator digital to analog architecture is also presented. Then a comparison is shown on multi bit single loop and cascade design based upon SNR, NTF and stable amplitude for audio applications. © 2015 IEEE.


Bahadur A.,Kamla Nehru Institute of Physical and Social science | Verma M.L.,SSGI | Mishra M.,Birla Institute of Technology and Science
European Physical Journal B | Year: 2015

Using first principle calculation, we investigate the structural, electronic and magnetic properties of silicon doped zigzag boron nitride nanoribbon (ZBNNR). Our results show that the shift in position of silicon doping with respect to the ribbon edge causes change in the structural geometry, electronic structure and magnetization of ZBNNR. The band gap of silicon doped ZBNNR is found to become narrower as compared to that of perfect ZBNNR. We find that band gap and magnetic moment of ZBNNR can be tuned by substitutional silicon doping position and doping concentration. © 2015, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.

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