A Novel Approach to Develop Grid Harmonic Model for Large-Scale Offshore WPP Integration to Turkey: A before-connection analysis for Northwest Turkey

Abstract

Turkey has shown a lot of interest in renewable energy in recent decades. In Turkey today, there is a tremendous amount of power produced by wind power plants (WPPs). Large-scale offshore wind power plants (OWPPs) can be a solution to reduce the demand for electricity, keeping in mind that Turkey's installed wind power capacity is primarily from onshore stations. Due to its high wind speed capacity, the northwest of Turkey may be a suitable choice for a future OWPP installation. Large-scale OWPP connections in the area not only help to meet the region's energy needs, but they also provide advantages for the stability of the grid. However, the integration of such a large-scale power plant might cause serious harmonic stability issues. Although the system operator adopts and effectively utilizes a comprehensive model of the Turkish transmission grid, there is no harmonic equivalent model of the transmission network, which is essential for harmonic assessments. In this study, an equivalent harmonic model for harmonic impedance analysis of a proposed large-scale OWPP connection to Trakya, northwest Turkey, has been constructed. A thorough model of the Trakya region is first created in order to determine the grid's essential resonance locations, and the remaining grid (beyond the two straits) is then represented using harmonic equivalents. Following these arrangements, the driving point and transfer impedances at three Point of Connection (PoC) busbars are calculated to create a harmonic bus impedance matrix. Utilizing the software DigSilent Power Factory, whole modelling and analysis procedure was performed.

Keywords

• Harmonics
• Offshore wind power plants
• Harmonic impedance analysis
• Harmonic propagation in networks

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