Optimization of power supply system reactive power compensation at the oil field electrical substation

This paper describes reactive power compensation regimes at the level of the oil field electrical substation of the oil and gas production enterprise in terms of active power losses minimization in the feed lines and transformers using local and centralized reactive power sources as well as electrotechnical complexes equipped with synchronous motors. The studies are carried out for a typical oil field electrical substation to determine the most economical mode of the reactive power compensation regime. The following values are determined during the calculations: voltages in the given points of the circuit, voltage drops in the branches of the circuit, currents in the branches, active and reactive power losses in the branches of the circuit and total power losses. Analysis of the obtained results has demonstrated that the optimal regime for the generalized circuit at the oil field electrical substation, in terms of energy saving in feed lines and power transformers, is the overcompensation regime by 30...40 % on the 6.3 kV side. This regime can be achieved by means of the reservoir pressure maintenance system synchronous motors transition to the regime of the reactive power generation. The results of the oil and gas production enterprise certification show that the majority of them have the available reactive power of the synchronous motors which makes it possible to ensure the given regime on the buses of the oil field electrical substation.