Measurement of the electric power quality and related problems

Manufacturers, customers and the International Standards are paying more and more attention to the concept of “quality” of an industrial product. In particular, the definition and measurement of the electric power quality is destined to become a big problem. Under sinusoidal, symmetric and balanced conditions, the power‐quality problem is basically a loading quality problem; otherwise, it may be also a supplying quality problem. The paper discusses the measurement of some electric power‐quality indices. It also considers the problem of separating the utility's contribution to the power quality deterioration from the customer's one.