1) How to calculate average power by having voltage and current waveforms of one oscillation period that looks like this?
Someone suggested me to use:
Won't this integration result in "negative power" somewhere between 5 us and 10 us and then again after 15 us? Applying this formula to waveforms that overshoot results in negative power. Sine waves with purely resistive loads should result in zero power (hence, RMS?). Shouldn't an RMS variation of this integration be used for average power measurement?
2) What can one say about instantaneous power where voltage waveform is positive and current waveform is negative (and vice versa)?