Power quality is indeed of paramount importance and often not considered as important as it should be.
Even in not so sensitive processes and applications the sinusoidal factor of waveform matters in ways more than we count normally.
Every load involves a lot of switching these days and depending on how far the load is located from Original Source of Power generation the Power quality available for consumption at load is affected, which is further deteriorated by switchings taking place at load.
Its an interesting tradeoff between more energy efficiecy, control and precision measures you bring in, you compromise a bit on the effect on Power quality of the sysyem. If corresponding corrective measures aren't taken locally the effects whirlpool into the larger system affecting poorer power quality input to other loads, and can also create a backthrust towards the supply system with high degree of harmonics and reactive power component. Which in turn also affects the lifecycle of major Electrical Appartus such as Transformers, Feeders, Busbars, Panel Boards and Generators.
Hence it becomes so very important to locally arrest the power quality deterioration generating factors at load and compensate for any benefitting switching and control but causing harmonics, sag, swell and interruption events by reactive power pumping, filteration of harmonics in conventional methods.
With latest technology its possible to reduce the effect of Switching by blocking higher frequency conductive and radiative emmissons from the load to not go pass beyond the breaker as well as measures of filteration, remodelling and local reactive power management are used to supress the waveform distorting factors and keep the power quality at peer loads and entire system at large relatively cleaner.
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