Application of IEEE 1459-2010 for the power investigation a traction substation transformer secondary voltage

Abstract

Today, with a steady increase in the number of consumers in which semiconductor converters are available, the nonlinear distortions value in electricity is increasing. Assessment of the electricity quality in traction networks is a problem related to the complexity of energy processes mathematical formalization in unballanced and non-sinusoid terms. Therefore, there is a need to find a calculation method with simple implementation and high informativeness indicators. The purpose is in the power components investigation of the secondary busbars a traction substation transformer, using the standard of IEEE 1459 - 2010. Guided by order of determining the instantaneous power components, regulated by standard IEEE 1459-2010, using the Fourier transform, the power values for each of the secondary voltage phases a three-phase transformer and the three phases as a whole were calculated. It is established that during the calculation as indicators reflecting of unballanced three-phase transformer mode, is use only fundamental harmonic components. This does not take into account the transition effect of pair harmonics and multiples of three harmonics, respectively, on the negative and zero sequences. It is noted, that the reactive power is calculated only by the fundamental harmonic. The higher harmonics reactive power is not included in recommended for definition. The results can be used in electrical energy control and metering systems, as motivating, to take steps to maintain of electricity quality required level at the metering point.