engleski

The controller for solar-hydrogen stand-alone power system (SAPS)

Small, commercially available SAPS consisting of solar PV modules, batteries, and loads regularly needs to be controlled by certain type of controller. The simplest controller has an input for electricity generated by PV modules, input/output connectors for batteries and connectors for the DC load. Controller directs automatically electricity to the load and/or to the batteries, or connects the batteries and a load when there is no electricity from the PV. If the future SAPS use except batteries and hydrogen energy storage system consisting of electrolyzer, pressurized hydrogen storage and fuel cell, the appropriate controller should be developed and commercially produced. This paper presents mathematical model of the very simple controller which directs and controls energy and mass flows between PV modules, batteries, electrolyzer, hydrogen storage, fuel cell and electrical load. Proposed logical scheme of the controller has been mathematically modeled and simulated as well as the rest of the subsystems of the SAPS (batteries, electrolyzer, hydrogen storage and load) using MATLAB-SIMULINK software. Input to the system model was supposed to be daily solar radiation and load profiles aimed to prove whether the controller logic can control the whole system on a practical and safe way. Mathematical equations, SIMULINK program and obtained results are presented and discussed. The conclusion is that proposed controller logic works well and that controller can be build using electronic components and commercially produced.

controller ; solar-hydrogen ; stand-alone power system ; SAPS

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