Large scale offshore wind power grid integration in Türkiye

The integration of renewable energy sources into power systems has gained significant momentum globally due to its unlimited supply and environmental benefits. Within the portfolio of renewable energy, offshore wind power plant (OWPP) has been experiencing steadily increasing growth. Although its well-known benefits, wind power has several challenges in grid integration such as: voltage and frequency stability. The key objective of this thesis is to examine to stability of the Turkish power system in case of integration of the large-scale OWPP and improve power system performance using grid forming control structure for wind turbine (WT). Toward to these goal, one of grid forming control structure, virtual synchronous generator (VSG), is developed for type IV to ensure frequency support. Moreover, the novel adaptive inertia method for VSG in the wind farm is designed to maximize VSG's frequency support (inertia support) with coordination of WTs within OWPP considering the wake effect. The grid following control (conventional), grid forming control, and novel adaptive inertia method for WT are developed and examined through detailed simulation using DıgSILENT/powerfactory . The stability analysis results show that the Turkish power grid could be maintained stable with the integration of 1800 MW OWPP in case of critical faults and outage of conventional power plants for grid following and grid forming controller structure. Further, the performance of the Turkish power system is improved in terms of frequency nadir and (rate of change of frequency) ROCOF when utilizing grid forming control, and the proposed adaptive inertia for VSG enhances the frequency regulation capacity of WPP.