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System Units | Conversion Example Between SI, PU and PQ

As an example, the RLC type load parameter form offers three choices as shown below.

With the SI system, the user must provide RLC values in ohms, henry, and farad.

The same load can be set in PU with reference to the base voltage, base MVA, and base frequency.

Finally, it is possible to set network load values in active (P) and in reactive (Q) power units.

Below are the equations used for system unit conversion:

EQ 1

EQ 2

EQ 3


EQ 5

EQ 6

EQ 7

EQ 8

EQ 9

EQ 10

EQ 11

EQ 12

EQ 13

EQ 14

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