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    In 2000 the IEEE published their standard 1459 called “Definitions for the Measurement of Electric Power Quantities Under Sinusoidal, Non-Sinusoidal, Balanced, or Unbalanced Conditions”. For the first time, Budeanu’s definition of reactive power has been listed as not recommended which should not be used in new reactive power and energy meters. Other measurements were also divided into the current and voltage fundamental component (the first harmonic) and the remaining higher harmonics. In most cases, it is recognized that the usable part of energy is transmitted by the 50/60Hz component, with a much smaller (and often harmful) participation of higher harmonics.  The standard also introduced a new measurement called nonactive power N which represents all nonactive components of power.

    in Types Of Power