Analysis for optimal distribution of PV panels and batteries in multilevel inverters

Multi-level inverters are preferred choice for PV application due to better harmonic profile and low dv/dt. Generally multilevel inverters for PV applications are fed with multiple sources and the load power distribution among these sources may not be equal for all operating conditions. This paper proposes an optimal distribution of PV panels and Batteries in multi level inverter for off grid PV applications. In this paper, generalized equations are proposed for calculating the energy supplied during each voltage level for any multilevel inverter. In addition, generalized panel distribution scheme in NPC inverter for optimal utilization of sources is also presented. This generalized panel distribution is according to pre calculated load shared by individual sources. This scheme is validated for five-level conventional NPC inverter. The advantages of the scheme are presented by State of Charge (SOC) of batteries using Mat lab/Simulink.