North Eastern Regional Institute of Science and Technology

About: North Eastern Regional Institute of Science and Technology is a education organization based out in Itanagar, India. It is known for research contribution in the topics: Population & Raman spectroscopy. The organization has 813 authors who have published 1429 publications receiving 16122 citations.

Survey on Diverse Applications used for Disturbance Rejection Control Techniques

Abstract: This study illustrates a review on various design method for disturbance rejection in control applications, in presence of external disturbances a state observer of optimal control is used. ESO (Extended State Observer) approximates the unknown states and with the help of it decreases the disturbance from the system to converge the system to be stable. The observer introduces reliability in the controller gain and dismisses the effect of external disturbance. The performance analysis was done here for industrial control system as well as laboratory systems too. One controller is proposed here to absorb the active disturbance for a higher order nonlinear system. From the nonlinear systems absorbing disturbance is very complex. If proper modeling of controller is not done then the system model may be not stable. The unknown states of the systems were identified and the disturbance was rejected. The stability of a high nonlinear system may be very difficult task, but this ESO has a higher impact on the stability of the system.

Extended State Estimator based two area load frequency control

Abstract: This paper presents an Extended State Estimator based controller for two area system. Using a state space Disturbance Observer has been proposed without using any integral control directly, to achieve constant rated frequency in the face of parameter uncertainties and system disturbances. The controller is constructed for a two-area power system which is identical in nature. The dynamic model of the power system and the controller design based on the model are elaborated in the report and the effectiveness of the proposed method is illustrated using numerical analysis.

Vertical Handoff in Heterogeneous Mechanism for Wireless LTE Network - An Optimal Approach

Abstract: Wireless correspondence is confronting the quickest progressive changes in innovation. The control plane 4G speeds are intended to surpass that of 3G. Current 3G speeds have an upper top at 14 Mbps downlink and 5.8Mbps uplink. On the off chance that we accomplish the speed of up to 100 Mbps for a moving client and 1 Gbps for stationary client is achieved, it is named 4G advancements. Seamless roaming and versatility the executives are the premier difficulties before heterogeneous 4G remote systems. The goal of this work is to discover the simple and helpful strategy for vertical handoff which spread all the vital parameters required for handoff with a rearranged way utilizing layered methodology so both programmed and client explicit handovers are conceivable. Here we propose the GPA strategy to be created on the three layered stage to give a straightforward design which performs both kind of handovers considering more extensive scope of elements for basic leadership.

Performance Analysis of Distributed Energy Resource-Based LV Distribution Grid

Abstract: Distributed energy resources (DERs) are mostly low-power-generating units. In order to augment the energy demands, integration of such energy sources with LV distribution grid is a viable option. A good-quality power from DER ensures safe operation of distribution grid. In this work, an integrated DER consisting of a photovoltaic system, a wind energy conversion system and a micro-hydro system is proposed and coupled to a common DC bus through appropriate power electronic interfacing circuits. A grid interfacing inverter is implemented as an inter-tie between DC-coupled DER and LV distribution grid. The DER supports the DC link voltage of the interfacing inverter. The performance of the distribution grid is examined via connection of a 3-phase nonlinear load onto the distribution grid. The interfacing inverter incorporates the features of DSTATCOM. The effectiveness of DSTATCOM-DER topology in mitigating the power quality problems of nonlinear load is realized through Icosφ control strategy. The results obtained are adequately explained. The quality of power at the point of common coupling is analyzed using total harmonic distortion and total demand distortion and is found to be within IEEE Std. 519-2014. The complete system is modeled and simulated in MATLAB/Simulink.