Abstract
Maximum Power Point Tracking (MPPT) algorithms are now widely used in PV systems independently of the weather conditions. In function of the application, a DC-DC converter topology is chosen without any previous performance test under normal weather conditions. This paper proposes an experimental evaluation of MPPT algorithms according to DC-DC converters topologies, under normal operation conditions. Four widely used MPPT algorithms i.e. Perturb and Observe (P & O), Hill Climbing (HC), Fixed step Increment of Conductance (INCF) and Variable step Increment of Conductance (INCV) are implemented using two topologies of DC-DC converters i.e. buck and boost converters. As input variables to the PV systems, recorded irradiance and temperature, and extracted photovoltaic parameters (ideality factor, series resistance and reverse saturation current) were used. The obtained results show that buck converter has a lot of power losses when controlled by each of the four MPPT algorithms. Meanwhile, boost converter presents a stable output power during the whole day. Once more, the results show that INCV algorithm has the best performance.
Highlights
Energy extracted from a solar panel depends on weather conditions which bring it to be an intermittent energy source [1] [2] [3]
This paper proposes an experimental evaluation of Maximum Power Point Tracking (MPPT) algorithms according to direct current (DC)-DC converters topologies, under normal operation conditions
This paper evaluates four of the various MPPT algorithms according to the buck and the boost converter, under normal weather conditions
Summary
Energy extracted from a solar panel depends on weather conditions which bring it to be an intermittent energy source [1] [2] [3]. In order to prevent the reverse flow of the current, a diode is connected between the solar panel and the load. That is why it is necessary to insert an impedance match block between the load and the photovoltaic (PV) panel This block can be a DC-DC converter which is controlled by an electronic system in order to follow the maximum power point of the solar panel. Most recent works are only based on a boost converter [16] [17] [18] [19] [20] This means that the performance of MPPT algorithms is evaluated on this topology mostly used in a PV system.
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