TANG Aihong,SONG Xing,SHANG Yufei,et al.Harmonic Mitigation Method and Control Strategy of Offshore Wind Power System Based on Distributed Power Flow Controller[J].Automation of Electric Power Systems,2024,48(2):20-28.
TANG Aihong,SONG Xing,SHANG Yufei,et al.Harmonic Mitigation Method and Control Strategy of Offshore Wind Power System Based on Distributed Power Flow Controller[J].Automation of Electric Power Systems,2024,48(2):20-28. DOI: 10.7500/AEPS20230113008.
Harmonic Mitigation Method and Control Strategy of Offshore Wind Power System Based on Distributed Power Flow Controller
the phenomenon of harmonic resonance amplification tends to occur in the offshore wind power collection system via power cables
which leads to decline in power quality. The distributed power flow controller (DPFC) is a device based on the voltage source converter
which can regulate power flow and control harmonics at the same time. In this paper
the frequency-domain correlation model of the offshore wind power system is constructed
and the reason for harmonic resonance amplification is analyzed based on this model. Then
the harmonic mitigation method of connecting the DPFC to the offshore wind power system is proposed
and the harmonic characteristics of the offshore wind power system with the DPFC are derived. Based on the these characteristics
a control strategy is designed
which reduces the harmonic voltage content of the grid-connected point by controlling the DPFC to track the harmonic compensation voltage that makes the harmonic voltage amplitude at the grid-connected point zero in real time. The simulation results show that the proposed harmonic mitigation method and control strategy of the offshore wind power system based on DPFC can effectively reduce the harmonic voltage at the grid-connected point and improve the power quality.
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