Banishree Misra

Model validation and maximum power point tracking of photovoltaic module

For efficient operation of a photovoltaic (PV) system accurate model of the PV module is required. In this paper a PV simulation model has been developed and has been validated with experimental results of a commercial PV module, ELDORA-40. Maximum power point tracking (MPPT) must be incorporated in the PV system to get maximum power from the PV system. Maximum power of PV depends on two external parameters, temperature and solar irradiation. Since solar irradiation has faster dynamics than temperature an effort has been given to track maximum power of a PV module using perturb and observe (P&O) MPPT for change of insolation. The study has been carried out in MATLAB-Simulink graphical user interface environment.

Performance analysis of second order adaptive filter using Matlab Simulink

Grid-tied distributed energy sources needs a proper synchronization technique which will estimate the phase angle of the grid voltage. The most common synchronisation techniques are being the phase locked loops (PLL)s, which decides the quality of grid utility power. By using different filtering techniques, the disturbance rejection capability in the (PLL)s can be improved. Synchronous reference frame phase locked loop (SRF-PLL) is the most commonly used synchronisation technique because of its simple operation good dynamic response. The conventional (SRF-PLL) controller with high bandwidth when used for synchronization work provides satisfactory performance when the grid voltage is undistorted and balanced. However SRF-PLL does not work properly in case of distorted and polluted grid conditions, so the estimated phase can have a substantial amount of unnecessary ripple. In case the grid voltage is balanced but polluted with higher order harmonic with reasonable amplitude, the detection system bandwidth can be reduced in order to attenuate the effect of harmonics on the output. Here second order adaptive filters (SOAF) are used to extract the harmonic components existing in balanced and polluted harmonic grid signals.

Performance improvement of single phase matrix converter using band pass filter for induction heating

This paper presents the design of a passive band pass filter with a single phase matrix converter (SPMC) topology used for induction heating. Proposed configuration reduces total harmonic distortion (THD) of the output voltage and therefore, enhances the fundamental output power. Here the sinusoidal pulse width signals are generated and synchronized to avoid commutation problems, occurred in matrix converter. The comparative analysis of matrix converter without and with proposed filter at the load end are compared. The simulation results of the proposed converter circuit are verified through MATLAB/SIMULINK.

Performance analysis of hybrid filters in high power applications

In the proposed work shunt connected active and passive harmonic filters are taken into consideration. This proposed configuration is able to eliminate current harmonics produced by large nonlinear loads which are connected to the grid. The current waveform is improved by passive harmonic filter created by a non-linear load, whereas active harmonic filter improves power balancing effect of the load. Among different types of shunt passive filters, a high pass filter, a double tuned filter and a C-type filter has been taken into consideration. Similarly a shunt active filter using voltage source inverter, a series inductor on the AC side and a capacitor on DC side is considered for the proposed hybrid filter design for high power application. The system performance with the filters is presented by considering different cases and the results are compared in the MATLAB-Simulink platform.