Study of Solar MPPT with Multi-level Cascaded Inverter Connected with Pumping System

The paper presents photovoltaic system and MPPT topology used for centrifugal pump structure. Maximum power transfer from source requires the establishment maximum operating point in the characteristics of power-voltage. Photovoltaic cell parameters are fully nonlinearity characteristics in nature that are responsible for providing only one highest potential point on PV under constant insolation situation. With change in temperature and variation in insolation, the PV characteristics and maximum power point (MPP) are getting change to avail MPP from the array of PV. It can be able to take single input as that of PV curve and produce duty ratio of boost converter to mark the MPP by implementing the algorithm. Further, the water pumping system is employed using two different types of inverter design. The 2-level types along with 3-level type inverters are implemented and the validation is carried out in terms of motor speed and tank volume characteristics. The validation represents the better achievements of reduction of voltage harmonics, better motor speed, higher volume of outflow of water in case of 3-level type inverter as compared with former having same identical rating of voltage and current.