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Steady-state model of direct connected generator–HVdc converter units in the harmonic domain

Steady-state model of direct connected generator–HVdc converter units in the harmonic domain

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A new twelve-pulse unit connection model is formulated and solved in the harmonic domain. The model takes into account the effects of generator saliency and saturation, interaction of the converter with the DC system, and variation in the firing and end of commutation angles caused by AC voltage and DC current harmonics. The reactive power control by generator excitation in the absence of converter transformer on-load tap-changers is also modelled. The solution of a test system is validated by means of time domain simulations.

Inspec keywords: synchronous generators; time-domain analysis; reactive power control; HVDC power convertors; commutation; power system harmonics

Other keywords: direct connected generator-HVDC converter unit; synchronous generator; twelve-pulse unit connection model; AC voltage harmonics; time domain simulations; generator excitation; DC current harmonic; DC system; harmonic domain; firing; reactive power control; steady-state model; saturation; commutation angles; generator saliency

Subjects: Control of electric power systems; Power and energy control; Synchronous machines; Power convertors and power supplies to apparatus; Mathematical analysis; d.c. transmission; Mathematical analysis

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