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Detuning of harmonic resonant modes in accordance with IEEE 519 standard in an exemplary north american distribution system with PV and wind

The increase in penetration levels of distributed generators like PV and Wind in a distribution system makes the IEEE 519 standard to be a vital aspect towards power quality. The network resonance has been described by IEEE 519 as a major contributor towards the harmonic distortion. Non-linear loads such as transformers, machines, silicon-controlled rectifiers (SCRs), solid state devices, power transistors, microprocessors and computers also contribute towards the injection of harmonics into a distribution system. The interaction between all kinds of elements of distribution systems and inverter based distributed generators like PV and Wind impacts the resonance modes to a definite extent. Based on the harmonic levels from the components in the system, the paper brings out a contribution in the form of a detuning methodology applied to a practical system to eliminate the harmonics. This would further serve as a recommendation for all the utility personnel and researchers. An exemplary North American system has been considered for the study towards detuning process. The phenomenon of resonance and harmonic issues has been inspired from a real situation due to capacitor switching towards power factor correction associated with an induction motor operating as an industrial load. Normally detuning is done on the capacitor banks when non-linear loads are active contributors to harmonics. Nowadays with more renewable penetration, this paper explores the observation during the interaction of renewables with the rest of the elements and an effective solution in the form of detuning to eliminate it is presented.