Performance analysis of AF-PI based Dual converter topology integrated into IEEE 30bus system

Abstract

In modern power systems the power quality issues are on exponential increase due to different load demands like EV charging stations and small industrial loads in commercial sectors. These loads cause voltage fluctuations and harmonics in the grid system impacting the other buses of the grid. In order to mitigate the effects of these loads on the grid a DCT is adopted in between the loads and the source bus of the grid system. A DCT is a combination of series and shunt compensation converters which mitigate the voltage fluctuation and harmonics caused by these loads. The proposed DCT is included with AF-PI DC voltage regulator in the shunt controller for optimal performance with adaptive control. For the performance analysis of the AF-PI based DCT, an IEEE 30 interconnected bus system is considered. The AF-PI based DCT is connected at the weakest bus of the IEEE 30 bus which is determined by ‘Newton-Rapson’ load flow analysis. The load flow analysis of the bus system is achieved by ‘powergui’ toolbox available in MATLAB Simulink software. The modeling of the AF-PI based DCT is done using blocks from ‘Specialized Technology’ of the Electrical block set in Simulink library. The voltages, currents and THDs of the DCT module are presented in this paper with time as reference.