Study of Inertial Frequency Response Control in Offshore Wind Farm with 5-Level VSC based HVDC Transmission System

London Journal of Engineering Research
Volume | Issue | Compilation
Authored by Samir Abood , Warsame H. Ali, Nishanth Malampati, John H. Fuller, Penrose Cofie
Classification: FOR Code: 090609
Keywords: NA
Language: English

In recent years the penetration of renewable energy power sources in many countries has been increased. This raises a significant issue with power system stability, particularly on frequency response. During large disturbances on power system network such as blackouts and tripping of large power generating sources, the grid must maintain a balance between power generation and load demand in order to maintain frequency stability. Test models are developed in Matlab/Simulink with 75 doubly-fed induction generators (DFIG) with inertial response control system. The velocity of the wind is assumed to be 12 m/sec (constant velocity) in test models to represent offshore wind farm. The offshore wind power generating plant is connected to the power grid through the Voltage Source Converter based HVDC transmission system. Two test models are developed based on 3-level and 5-level voltage source converter. Detail simulations were analyzed, to study the transient functioning of the power system when the wind turbines are requested to exhibit inertial response. The impact of inertial response on power system stability and total harmonic distortion levels in two tests were discussed in this paper.



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