Instantaneous power calculation between equal time increments.

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SUMMARY

Instantaneous power calculation from cumulative KWh values recorded at 5-minute intervals is not feasible. The discussion concludes that the only viable approach is to calculate the average power over the 5-minute period, as instantaneous power requires continuous data. The method proposed involves subtracting the power value at time 1 from the power value at time 2, but this does not yield instantaneous power. Therefore, the best estimate available is the average power derived from the provided data.

PREREQUISITES
  • Understanding of cumulative KWh measurements
  • Knowledge of power equations, specifically P=IV
  • Familiarity with the concept of instantaneous power versus average power
  • Basic principles of electrical circuits and power analysis
NEXT STEPS
  • Research methods for calculating average power from discrete data points
  • Learn about the implications of time intervals on power measurement accuracy
  • Explore the differences between instantaneous and average power in electrical engineering
  • Investigate tools for analyzing electrical circuit data over time
USEFUL FOR

Electrical engineering students, power system analysts, and anyone interested in understanding power measurement techniques and their limitations.

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Homework Statement



If given cumulative (Adding up every increment to the next) KWh values at an interval of 5 mins each. is it possible to determine instantaneous power from it?

Homework Equations


P=IV
P(t) = VI cos(ωt) cos(ωt −θ )

The Attempt at a Solution



Well, because the question is more about stating a method than actually calculating something. I have thought about it. I think the instantaneous power should just be the difference of Power at time1 and Power at time 2, in this case. Now, of course, if i actually had a circuit, i could go around doing analysis and coming up with Voltage in terms of time and Current in terms of time. That way i can easily come up with a function of instantaneous power with a variable of time in it.
But what this stats is more like, if you are given a value of power for every 5 minutes then what the instantaneous power should be using only the data given? I can't think of much except for taking the value of power at time 2 and subtracting it from value of power at time 1. And that should give me the power that was recorded between those 2 instances.
 
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No, it is not possible to find an instantaneous power. The best you can do is the average over 5 minutes because that is all the information you have.
 

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