National Institute of Technology, Silchar

About: National Institute of Technology, Silchar is a education organization based out in Silchar, Assam, India. It is known for research contribution in the topics: Computer science & Control theory. The organization has 1934 authors who have published 4219 publications receiving 41149 citations. The organization is also known as: NIT Silchar.

Review of Circuit Level Leakage Minimization Techniques in CMOS VLSI Circuits

Abstract: Ever increasing demand for portable and battery-operated systems has led to aggressive scaling. While technology scaling facilitates faster and high-performance devices, at the same time it causes excessive power dissipation especially the leakage. Leakage power dissipation is now a dominating component of total power consumption in today's high-performance chip. So there is a tremendous need to limit the power dissipation in high-density chips, which has initiated many innovative techniques to develop in the design of low power circuits and systems. Nano-scaled very large-scale integration (VLSI) chips have ultra-thin gate oxide, very low threshold voltage, and have short channels. Therefore, leakage power dissipation has emerged as the most challenging issue in VLSI circuit and systems. In this paper, we present a general review of the state-of-the-art circuit level leakage minimization techniques since 1995. It also conceptually classifies the different techniques for leakage minimization. Furt...

PSO based frequency controller for wind-solar-diesel hybrid energy generation/energy storage system

Abstract: The aim of this paper is the tuning of a PI controller using PSO techniques for autonomous hybrid energy generation/energy storage system. The autonomous hybrid generation system consisting of wind turbine generators (WTG), solar photovoltaic (PV), diesel engine generators (DEG), fuel cells (FC), battery energy storage system (BESS), ultra capacitors ( UC) and aqua electrolyzer (AE) has been considered for simulation studies. The power system frequency deviates for sudden changes in load or generation or the both. The comparative performance of the controllers installed to alleviate this frequency deviation for different hybrid systems, is carried out using time domain simulation. In practice, PI controller is tuned manually which is difficult and time consuming. The computational intelligence has opened paths to a new generation of advanced process control. Here, PSO is used for optimization of controller gains of the proposed hybrid system. The simulation results demonstrate the effectiveness of the PSO based controller in terms of reduced settling time, overshoot and oscillations. The results are compared with conventional controller.