Comparison of the Characteristics of High-Voltage Frequency Converters of Electric Drives

O.V. Kryukov

Abstract


The prospects of frequency control performance of electrically driven gas compressor units at compressor stations of gas mains. The analysis of peculiarities of the topology and energetic characteristics of modern high-voltage frequency converters presents for the modernization and new construction of electrically driven compressor stations on the objects of PJSC "Gazprom". Considered design features of structures and functionality of multilevel converters domestic production to improve energy efficiency and reliability of gas compressor units. The simulation of the harmonic composition of output voltage and current of high-voltage frequency converters made by different topology, as without an output filter, and a sine output filter when operating in the systems of adjustable drives of centrifugal compressors. In the simulation determined parameters of the l-shaped LC-filter to reduce the ratio of THD to an acceptable value. The paper power the resulting output characteristics waveforms and harmonic spectra of the 5 most typical parameters of the structures of the frequency converters presents when working on an active-inductive loads of different in the entire speed control range. The results of the calculation of the coefficients of distortion of the output voltage and current and the respective levels of spectra of frequencies of voltage when the PWM frequency is 550 Hz and the frequency inverter 15-50 Hz for multilevel inverters. The expediency of application for some types of converters compensating devices for different areas of regulation. Summarized the parameters of the sine filters for different types of variable frequency drives EGPA voltage 6 (10) kV.

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References


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DOI: http://dx.doi.org/10.24892/RIJEE/20160207

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