![]() ![]() ![]() In doing so, they cause harmonic voltage drops in all the impedances through which they pass which distort the normal supply sinusoidal voltage. These emitted harmonic currents, like any generated current, will circulate via available paths and return to the other pole of the non-linear load. The distortion to the normal incoming sinusoidal current wave can be considered to result from the load emitting harmonic currents that distort the incoming current. Harmonic distortion needs to be defined as either ‘current distortion’ or ‘voltage distortion.’ Non-linear loads, unlike linear loads, draw a non-sinusoidal current from a sinusoidal voltage supply. Hardy CEng FIET, in Transmission and Distribution Electrical Engineering (Fourth Edition), 2012 24.3.1 General
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