Research into harmonic power in the high-voltage networks
The paper presents the results of studies on the harmonic active and reactive power at nodes of 110 kV and 220 kV networks. The studies were based on the measurements made at the node of 110 kV network supplying power to an aluminum plant and at the node of 220 kV network supplying power to railway traction substation. The supply networks belong to the Unified Energy Systems of Russia. Many other facilities with high-power nonlinear loads receive electric energy from these networks. They make their contribution to the formation of harmonic conditions across the networks. The measurements of currents and voltages were used to calculate active and reactive power for harmonics 2-40. The calculations show that although the considered facilities are the sources of harmonics and generate harmonic power to the supply networks they also receive harmonic power from them. The harmonic active power flows change directions during the measurements. Their values vary in a wide range and can reach several tens of kilowatts. The values of harmonic reactive power also vary in a wide range. They change the direction of the flow and affect the values of voltage, as a rule, at the characteristic harmonics of the nonlinear electrical equipment.
Библиографическая ссылка
Kovernikova L.I. Research into harmonic power in the high-voltage networks // Renewable Energy & Power Quality Journal. Vol.1. No.14. 2016. P.696-701.
