Analysis of accident rate and reasons of condensing unit failures in electrical energy supply system of oil and gas production
The paper deals with the experimental studies of the quality of electrical energy in the stand alone system of power supply of one of the enterprises of the oil and gas industry on 0.4 kV buses of 6/0.4 kV substation as well as estimates the harmonic composition of current and voltage in various nodes of the electrical network. Numerical analysis of the distortion degree of the voltage and current waveform in the distribution network is performed using instrumental measurements by means of Resource-UF2M power quality analyzer and Hantek DSO 1102B digital oscilloscope. The analysis is given to process flow disruptions caused by the presence of harmonic distortions in the power supply system. Failure statistics for various kinds of electrical equipment exposed to higher harmonics has been collected on the base of the obtained operational data. Higher harmonics of current and voltage significantly worsen the operating conditions of the main elements of the energy system power equipment, have an adverse effect on relay protection, automation, telecontrol and communication devices, which according to the presented statistics of emergency events leads to serious technological failures and significant economic costs.