Hybrid Renewable Energy System Proposal: Offshore Wind and PV Farm with Optimally Designed LCL Filter in Datça, Aegean Sea, Turkey

Different kinds of power electronics-based converters and inverters are used in the grid integration of Renewable Energy Systems. These power electronic based interfaces cause harmonic distortion in voltage and current of the grid. This research aims to propose and design a hybrid renewable energy system that uses Type 4 Permanent Magnet Synchronous Generator (PMSG) and Photovoltaic (PV) power generation farm for the Datça region in Turkey. Also, the study examines the optimal passive filter designs and harmonic analysis for designed hybrid renewable power system. In detail, the system has a 2 MW PV farm is designed to be combined with a 2 MW offshore wind farm (OWF) which is connected to the 120 kV common grid by a 25 kV distribution feeder. Additionally, utilizing meteorological data that is taken from Datça, Aegean Sea region, Turkey, such as wind speed and solar irradiation, as input parameters of the hybrid power generation system. After that, to study harmonic analysis and optimal filter designs, a mathematical strategy is proposed. First of all, the arithmetic mean (AM) of daily data (DD) is considered as the input value of OWF and PV system. With using these values, an optimal LCL filter design is found by a recently proposed meta-heuristic algorithm, Mountain Gazelle Optimization (MGO), algorithm. According to IEEE 519 standards, the optimization method seeks to minimize both the voltage levels in p.u. and the total harmonic distortion (THD) of current and voltage values. Moreover, the hybrid renewable power model is simulated with optimal LCL filters by using DD wind speed and solar irradiation values. Moreover, the performance analysis based on the results of AM data and DD values is studied.