What is three phase power
How do you calculate a three-phase kilowatt-hour from time-sampled data of the voltage and current of each phase?
My problem is that I want to calculate a three phase kilowatt hour from time sampled data of current and voltage.
1) How can I calculate the kilowatt hour from time-controlled data? Are there any equations?
2) Does the phase shift have to be carried out? (How can I calculate the phase shift from the sampled data of voltage and current? How do I relate this to the calculation of three phase power.)
3) Please suggest to me if there is a better platform available to resolve my doubts.
4) Is it true if I calculate the kilowatt hour of each phase separately and some in total?
I get the instantaneous sample (does not continue) (I have some sensors that show the current and voltage - I convert this to digital for processing). Approximately 50 samples are obtained from 1 second. (Should it be zero when we increase the total three-phase power - due to a phase shift of 120). How can I calculate the total three-phase kilowatt-hour from this sample? I process my data in Arduino.
It depends on your load. If you have a symmetrical load that is sinking a sinusoidal current and the power changes relatively slowly, what you're doing works. You can calculate the power for each sample by:
Combine all the samples and you will get the desired energy W.. For example with 50 samples / s:
But if your power isn't that nice and your power usage changes quickly (within a period of time) you need a lot more samples than 50 / s (as Andy aka said).
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