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How does Simulator convert transmission line flow between MVA and Amps?

April 26, 2017amps convert flow line MVA simulator transmission

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How does Simulator convert transmission line flow between MVA and Amps?

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Variables that are calculated by a power flow are the MVA flow leaving a bus along a transmission line and the bus voltage. -The MVA flow is the total MVA flow on all three phases of the transmission line (S3-). -The voltage is the line-to-line voltage (Vline-line) Current is only defined for a single phase, so in order to determine the single phase current, solve S1- = Vline-nuetral * I (where I = current) To convert the values the power flow calculates to the ones in this equation, do the following S1- = S3- / 3 Vline-nuetral = Vline-line / sqrt(3) Thus we can write S3- / 3 = Vline-line / sqrt(3) * I Which simplifies to the equation used to determine the current on a transmission line I = S3- / ( sqrt(3)* Vline-line ) Note: The same equation is true for a transformer.