PV BASED LED STREETLIGHT & WATER PUMPING SYSTEM

Abstract

In this work two Application of standalone PV system i.e. Solar LED Street light and water pumping system are carried out. These applications help in reducing the electric energy consumption and also enhance the rural electrification where grid is not present. In this thesis the techno economic analysis of different lighting schemes is carried out by using DIALux Software, which results in LED as an efficient light and then modeling of LED is discussed. The PFC buck converter based LED driver circuit is designed and implemented in this work. Solar Fed LED Street lighting system has different components i.e. SPV array, MPPT, dc-dc converter and battery unit. In this system MPPT plays a main role in battery charging so, the comparison of different MPPTs is carried out. In Solar Fed street lighting system which is modeled in Matlab-Simulink, the intensity of Street light is controlled from traffic hours to non traffic hours which results in saving the electricity consumption to half as compared to the non intensity controlled system. The PV hybrid street light is also implemented in this work. Solar oriented energy is an outstanding solution for rural regions where the grid isn't accessible. Most supported use of the SOLAR-PV System (SPV) is in water pumping system driven by DC/AC motors. Solar Powered DTC controlled Induction motor drive is superior to DC motor based system. The system includes MPPT (INC) with dc-dc boost converter, Voltage source inverter and a 3-phase induction motor drive. The DTC controlled techniques estimate the torque and flux, based on the instantaneous error of flux and torque the switching of VSI is generated. The reference speed is estimated by pump affinity law and DC link voltage regulation. The modeling of water pumping system is carried out using Matlab-Simulink.