Diagnosis fault of power converters in solar photovoltaic system with battery storage connected to grid

Abstract

In recent years the increasing demand for electricity and the nonrenewable nature of fossil energy makes the move towards renewable
energies required. However, the common problem of renewable sources, which is the intermittence, is overcome by the hybridization
of complementary sources. Thus, whenever the load demand is not fully covered by the primary source, the second one will absolutely
support it. Moreover, the solar photovoltaic system with battery connected to grid the One of the most used connections, In order to
ensure the continuity of power energy supply. Also, monitoring and diagnosing errors in the various installations of these systems is very
necessary in order to avoid falling into serious damage that leads to a complete shutdown of the system.
In this paper, we are interested to study the common fault in the semiconductors (switches) of power converters, especially open
switch fault in the inverter (Bidirectional DC-AC power converter), and we are proposed a fuzzy-based fault diagnosis approach presents
a fault detection and localization (FDL) method for open-circuit faults (OCF) in the switching devices (IGBT) of a grid-connected
three level inverter in photovoltaic (PV) system. The global model of the system is built using MATLAB/Simulink