Good Morning

I have a question on how to calculate voltage imbalance.

The data that have contains AVERAGE MINIMUM and MAXIMUM values for each of three phases, with records recorded one time per second.

I know the voltage imbalance percentage formula, and repeat it here:

Formula stating Voltage unbalance=100 x Max. deviation from average voltage/Average voltage

For example, if measured line voltages were 455, 460, and 492, the average would be 469 volts (455 + 460 + 492 = 1407 / 3 = 469). The maximum deviation from that average is 23 volts (492 - 469 = 23). To find the voltage unbalance, solve the equation for the average voltage and the maximum

voltage deviation: Formula stating Voltage unbalance=100 x (23/469) = 4.9%

My question is which voltage values should be used in the calculation.

I think that I should use the AVERAGE of all (AVGab +AVGbc + AVGca)/3, and the maximum deviation being the largest of the AVERAGE from each phase AVG. correct?

I should have mentioned that the average value recorded is not a simple average of the MIN and MAX values, but must be calculated during the one second before recording the value.

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