International Journal of LNCT

ISSN (Online):2456-9895



Volume-2 Issue-9 December-2018

[1] Power Enhancement in Hybrid PV Wind System Using Power Buffer Control

Ritu Gupta , DR. Amit Shrivastava & Prof. Sandeep Prasad

Solar and wind energy system is one of the most prominent sources of energy. The utilization of solar and wind energy system has become increasingly popular due to modular and environment friendly nature. Solar and wind energy system works normally in standalone or grid connected mode, but the efficiency of these sources is less due to the stochastic nature of solar and wind resources. The hybrid renewable energy sources with grid integration overcome this drawback of being unpredictable in nature. The use of active dynamic buffers is a method for mitigating the effects of constant power loads is. These devices act as an interface that decouples the dynamics of the load from the system. In this paper we have designed a hybrid Solar Wind Energy System using MALAB/SIMULINK environment to enhance the output by reducing Total harmonic Distortion in the output voltage waveform by employing suitable power buffer. The active Power output with power buffer came approximately 8000 volt ampere and is highly stable whereas the active power output from the inverter without buffer is varying between 5000 volt amperes. More smooth and stable active power output from the inverter has been achieved with power buffer in solar wind hybrid system. It was concluded that the stability and safety of the power grid based on the hybrid system is improved when the power through the designed hybrid system with power buffer is fed to the grid system.

[2] Single/Multicarrier Block Transmission Systems Optimal Pilot Design for Channel Estimation

Mahima Raikhere & Prof. Aparna Gupta

The sensor nodes communicate together by wireless techniques, and these communication techniques are handled for channel estimation pilot sequence is design in such way that frequency selection is single carrier SC and multi-carrier MC block transmission systems. The Bayesian Cramer Rao bound BCRB is minimized by the channel estimation with training design for MSE. which also gives us the knowledge about channel combined with receiver noise covariance and which is subject to total transmit power constraint. The optimal pilot sequence which is applicable for 4 block transmission systems that is single carrier - zero padding, multicarrier -zero padding, single carrier - cyclic prefix, multi-carrier - cyclic prefix system which is driving from propose approaches. The framework proposed, and drive results will be general with the wide applicability. In the terms of MSE and BER both the conventional pilot design is present less result in comparison to the simulation results will good of the proposed pilot design approach.