Effect of Varied Control Technique in Modeling of Unbalanced Radial Distribution System
Keywords:
Dynamic phasor (DP), Induction machine, Single- phase photovoltaic, Small-signal analysis, Fuzzy control MPPT.Abstract
Modeling of distribution system has got an importance in successful maintenance of a power system and in serving the demand optimally. A specific case related to distribution system viz., unbalanced radial distribution system has been taken up to model using dynamic phasors with Fuzzy logic based MPPT control in this paper. Comprehensively the model is analytical in nature and called as analytical model of an unbalanced radial distribution system consisting of a single-phase photo-voltaic (PV), a three-phase induction machine load, a three-phase power factor correction capacitor (PFC), and a load. The developed model with fuzzy logic control is better in performance represented in terms of THD with respect to the PI control. The fuzzy control integrated model is capable of small-signal analysis and can be used effectively to identify variety of stability and /or harmonic issues in distribution networks, (e.g. instability due to weak grid) in a better than other control techniques. The analytical model is built in Matlab where power electronic switching details are included. The comparative analysis between the varied control techniques viz., PI control and Fuzzy control is carried out by validating the THD values of Ipv of PV and Vabc of induction machine.
