Improved Dynamic Power Flow Model with Frequency Regulation by DFIG Integrated through VSC-HVDC Considering Governor Delay of SG

The doubly-fed induction generators (DFIGs) integrated to the grid through the voltage source converter-high voltage direct current (VSC-HVDC), the cascaded droop control from the system frequency to the DC voltage, then to the active output of the DFIG, was applied to enhance the frequency regulati...

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Bibliographic Details
Published in:Applied sciences 2022-06, Vol.12 (11), p.5447
Main Authors: Sun, Tingting, Huang, Jiejie
Format: Article
Language:English
Subjects:
Accuracy
Converters
Direct current
doubly-fed induction generator (DFIG)
dynamic power flow
Electric power distribution
Electric power systems
Energy
Frequency dependence
frequency regulation
Frequency response
Generators
governor delay
Governors
High voltage
Induction generators
inertia constant
Kinetic energy
Power flow
Variable inertia
Voltage
voltage source converter-high voltage direct current (VSC-HVDC)
Wind power
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Summary:The doubly-fed induction generators (DFIGs) integrated to the grid through the voltage source converter-high voltage direct current (VSC-HVDC), the cascaded droop control from the system frequency to the DC voltage, then to the active output of the DFIG, was applied to enhance the frequency regulation capability of the power system. The improved dynamic power flow (DPF) model was newly proposed to quantify the frequency response of the coordinated regulation with the inertia of the VSC-HVDC and the DFIGs, and the primary regulation of the synchronous generators (SGs) and the DFIGs. New features of the proposed model include: (i) the SGs’ output in the DPF considering the governor delay, (ii) setting of the virtual inertia of the VSC-HVDC within the DC voltage constraint, and (iii) variable inertia of the DFIGs following changing the kinetic energy of the rotor. The numerical results show the feasibility of the proposed model, and validate the regulation effect and accuracy of the modified inertia of the DFIGs and the maximized virtual inertia of the VSC-HVDC.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12115447