Optimizarea surselor hibride de putere bazate pe energii regenerabile / Optimization of hybrid power sources based on renewable energies

The thesis addresses the problem of optimizing hybrid power sources, based on renewable energies. A simulation interface was created for a cell, module or PV area, based on the mathematical equations used to model the component elements of a photovoltaic installation, which allowed the simulative testing of the proposed algorithms. The interface is made in the Matlab-Simulink simulation environment. With the help of the interface different types of PV modules used in the construction of photovoltaic parks can be analyzed, studied, can also be used to train technical staff operating in photovoltaic parks on the characteristics of current-voltage, power-voltage for different values of solar radiation and temperature as well as on the behaviour in partial shading conditions for one or more PV modules. A comparative analysis of the maximum power point tracking (MPPT) techniques was made using the following algorithms: the P&O algorithm and two algorithms proposed by the thesis author based on the ES control (aESC and mESC). A comparison was made between the G1PESC scheme based on one BPF filter and the global G2PESC scheme based on two BPF filters. A case study was performed for an FC / RES HPS architecture. The analysis of two topologies (Air-LF and Fuel-LF) is presented for constant load profile without renewable energy sources, constant load profile with renewable energy sources and variable load profile with renewable energy sources to decide which topology it's better. A case study was conducted on the sizing of a hybrid power system based on renewable energies using HOMER and iHOGA applications. The same case study was designed under the same environmental and load conditions using the two HOMER and iHOGA software. A comparative analysis was also done, showing the advantages and disadvantages, to allow the investor to choose the most convenient solution. A case study was performed for a photovoltaic park using the SCADA system in order to achieve its energy management. The case study refers to a photovoltaic plant located in a plain area of Romania.