electricpy.fault.phs1mvasc

electricpy.fault.phs1mvasc(Vth, Zseq, Rf=0, Sbase=1)[source]

Single-Phase MVA Short-Circuit Calculator.

Calculator to evaluate the Short-Circuit MVA of a single-phase fault given the system parameters of Vth, Zseq, and an optional Rf. Uses the formula as follows:

\[MVA_{sc} = \left|I_1^2\right|*|Z_1| * Sbase\]

where:

\[I_1 = \frac{V_{th}}{Z_0+Z_1+Z_2+3*R_f}\]
Parameters:

  • Vth (complex) – The Thevenin-Equivalent-Voltage

  • Zseq (list of complex) – Tupple of sequence reactances as (Z0, Z1, Z2)

  • Rf (complex, optional) – The fault resistance, default=0

  • Sbase (real, optional) – The per-unit base for power. default=1

Returns:

MVA – Single-Phase Short-Circuit MVA.

Return type:

real