A dynamic on-grid solar power systemusing a bi-directional counter meter

Abstract

Recent advancement in technology has led to a remarkable increase in solar cell efficiency while causing a reduction in the expenses of PV systems and the adoption of a PV system as a reliable source of energy globally. To further reduce the entry barrier of PV systems, most governments have introduced several incentives including a Net-metering tariff which uses a bi-directional meter for grid-connected PV systems. This research work focuses on the design and simulation of a 2kW grid-connected system with an integrated bi-directional metering unit. The system also involved the integration of a bidirectional Vehicle to Grid (V2G) and Grid to Vehicle (G2V) Electric vehicle charging features. The design, modelling, simulation and analysis of the developed system was done using the Simulink interface of the MATLAB suite. The system essentially consisted of a 'Perturb and Observe' MPPT system, a phase-locked loop (PLL), an LCL filter and a Mosfet based single phase inverter system. The simulation result obtained from running the model at different levels of irradiance and the response of integrated bidirectional meter indicated a functional system capable of metering energy in both modes. Keywords: Bi-directional Meter, Grid Connected PV system, LCL filter, PID Controller, MPPT, P&O Algorithm., MATLAB/SIMULINK, Vehicle to Grid (V2G), Grid to Vehicle (G2V)