Ac Dynamic Load Control from Solar Energy by Using Phase In-Position Control Technique

Abstract

A two stage, three-phase grid interfaced SPV (Solar Photovoltaic) energy conversion system with an ANF (Adaptive Notch Filter) based control algorithm is proposed in this paper. In this paper we are using in phase opposition technique. In this technique the carrier pulses arranged in a linear and in phase with overlapping manner to get both positive and negative sequence. The ANF has been used for extraction of fundamental part of load current. The proposed system uses an adaptive notch filter based control algorithm, which is proposed and comparatively more suitable for non-stationary environment. The proposed SPV system is a multi-function grid-interfaced solar PV energy conversion system, which along with conversion of dc-power from SPV to ac mains, is capable of reactive power compensation, harmonics currents elimination and load balancing in a three-phase ac distribution system. A multifunction grid-interfaced SPV energy conversion system is capable to capital investment, space and maintenance cost on behalf of multifunctional features compared to multiple devices with different functionalities. Compared to other methods the control algorithm is adaptive with respect to the fundamental frequency of the system and provides instantaneous values of the fundamental signals. The advantages of this technique the switching losses will be decreased and efficiency will be increased. By using the simulation results we can verify the validity of the presented algorithm and confirms its desirable transient and steady state performances.