What are the harmonic effects on upstream network of distribution networks?

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Bogdan Tomoiaga

What about this paper? (https://www.researchgate.net/publication/4307798_The_load_flow_calculation_in_harmonic_polluted_radial_electric_networks_with_distributed_generation?ev=prf_pub)

Conference Paper The load flow calculation in harmonic polluted radial electr...

Pedro Werlinger

The harmonics are produced by non linear or commutated loads as current sources, and when they flow through a network they produce harmonic voltages in upstream busbars, Vi= Zi* Ii (i is the harmonic order, the frequency of the harmonic is i* 50 or 60 Hz). In this way, the pollution produced by these loads is extended to the whole network, and if a resonance occurs, these harmonics could be amplified and will cause many problems. To avoid these effects, frequency and magnitude of harmonics in a polluted electrical system should be measured or calculated in order to compensate them with appropiate tuned filters.