Efficiency Estimation of Hybrid Electrotechnical Complex for Non-Sinusoidal Signals Level Correction in Autonomous Power Supply Systems for Oil Fields

Abstract

Actuality of highest harmonics hybrid compensation in currents and voltages was gained to improve efficiency of oil fields power supply equipment. A positive effect is achieved due to implementation of active and passive filters in centralized and autonomous power supply systems with high percentage of non-linear loads. There was an observed structure of the hybrid electrotechnical complex based on a parallel active filter and two passive filters that were set for elimination of the 5th and 7th current harmonics that were generated by non-linear load represented as a power converter. This scheme was adapted for the use with a frequency-controlled electric drive due to adjustment of the parallel filter DC link and non-linear load of the frequency converter. There were developed mathematical and computer simulation models of the observed hybrid electrotechnical complex with the common DC link for the conditions of autonomous power supply at the oil field object. The control system of the autonomous electrotechnical complex hybrid part was develop. It contains phase converters and a dead space width disposal variable of relay controllers during generation of control pulses. Analyses of non-sinusoidal level adjustment efficiency of voltage and current signals were conducted after simulation of the hybrid electrotechnical complex. The calculations of technical-and-economic indices and efficiency usage were performed taking into account implementation of the hybrid electrotechnical complex into industrial power supply systems. The obtained results prove that the developed hybrid electrotechnical complex with the common DC link for the autonomous power supply of oil fields in the DG networks is efficient, reliable and can be installed in the existing power supply systems.