Harmonic voltages and lightning equipment flicker caused by pumping station - measurements, analysis and mitigation
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This paper discusses cause and effect of harmonic voltages and severe lighting equipment flicker that were observed by low voltage end consumers in connection with the operation of a pumping station connected to a 22 kV radial line of a typical MV distribution network of a Norwegian utility. The pumping station, consisting of three wound-rotor induction motors rated at 1.75 MW, 6.6 kV, forms part of a local medium-size hydro power scheme. The voltage disturbance is a 7.harmonic (and partly 5.harmonic) component fluctuating with a frequency of approximately 2 Hz, resulting in considerable flicker problems in lighting equipment at end customers, causing customer complaints.
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