Discussions and Closures Discussion of “ Instantaneous Reactive Power - Theory and Power Properties of Three - Phase Systems ”

The author of the paper [1] should be commended for his continuous contributions pointing out the deficiencies of many of the available power theories. We fully agree with the author that the instantaneous p-q theory has important deficiencies when it comes to the physical interpretations of the power components. In [2], the author properly states that the main objectives of a power theory include: “Explanation of power properties of power systems ...”. In the paper, the author advocates his CPC Power Theory. With very simple examples, we will show that the CPC Power Theory does not properly explain the instantaneous properties of power. In Fig. 1, we show two loads (one linear and one nonlinear) consuming the same average power P . Consider that the excitation voltage is sinusoidal, given by