MPPT BASED PV ARRAY FED VECTOR CONTROLLED INDUCTION MOTOR DRIVE

Abstract

The ever increasing demand of electrical energy and limited availability of non-renewable resources have led to the use of renewable energy resources like sunlight for various purposes. Solar energy is cheaper as well as cleaner when compared to coal, petroleum, etc. The evolution of power electronic devices have further reduced the difficulties in properly utilising this energy for different applications. This report focuses on extracting maximum power from the solar panel using various MPPT techniques. Two techniques namely P&O method and Incremental conductance method are employed to bring the operating point at MPP. Illustration of mathematical modelling of solar PV Array as well as simulating it on SIMULINK/MATLAB. Thus designing of solar PV array is done using mathematical equations in SIMULINK environment. Various number of series and parallel combination of PV modules are employed depending upon its current and voltage ratings. After designing it, using various algorithms in MATLAB, MPP can be traced and maximum power can be obtained. This maximum array voltage helps in generating duty cycle which provides gating pulses for switching boost converter thus achieving higher voltage levels and then fed to a current controlled inverter for further running an induction drive which can be useful for many applications like water pump load. Because of highly efficient motor control algorithms and high efficiency, AC motors are much ahead of DC motors. Due to low cost, less maintenance, high efficiency and good capability, induction motors are employed almost everywhere. This three phase induction motor is operated in vector control mode in Simulink environment in order to control the speed of motor drive, thus, utilizing it for variable speed drive applications. Moreover sensor-less control of this drive ensures good performance with low cost. The performance of the proposed model is achieved through MATLAB.