Harmonic Analyses of Power Grid in Large-Capacity Groups of AC-DC-AC Frequency Speed Drag System

Ji Zhong Wang; Chao Nan Tong; Rui Li

doi:10.4028/www.scientific.net/AMM.448-453.1988

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 448-453Harmonic Analyses of Power Grid in Large-Capacity...

Harmonic Analyses of Power Grid in Large-Capacity Groups of AC-DC-AC Frequency Speed Drag System

Abstract:

Based on the synchronous machine in AC-DC-AC Frequency speed drag System, a new power supply method of phase shifting combination is proposed by a detailed study of the impact in the power grid harmonics. With regard to the main Motor drive system of hot-rolling finishing mills, a large number of varying parameters quantitative analysis is made respectively for power load, LC filter, pulse-width modulation circuit and transformer, in which the grid side harmonic rate and waveform distortion rate is focused on. The simulation results show that the power supply method with reasonable parameters design of the drag system can be drastically reduce the grid side harmonic interference that the total harmonic distortion is suppressed within 4.0%. Results of this study provides an effective method for the design of the factory drag system, reactive power compensation system as well as fault diagnosis of electric drag system.

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Periodical:

Applied Mechanics and Materials (Volumes 448-453)

Pages:

1988-1993

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.448-453.1988

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Online since:

October 2013

Authors:

Ji Zhong Wang*, Chao Nan Tong, Rui Li

Keywords:

AC-DC-AC Inverter, Harmonic Rate, Motor Drag, Phase Shifting

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* - Corresponding Author

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