Risk of resonance
Risk of resonance
\[ S_{sc} = \frac{S}{ \frac{Z_{sc}}{100} } \]
· Ssc(approach): Short-circuit power, kVA
· S: Apparent power transformer, kVA
· Zsc: Short-circuit impedance, %
\[ fr = \sqrt{ \frac{S_{sc}}{Q} } \]
· Ssc: Short-circuit power, kVA
· Q: Reactive power capacitors, kvar
· fr: Resonant frequency, Hz
\[ n = \frac{fr}{f} \]
· n: Harmonic order
· fr: Resonant frequency, Hz
· f: Network frequency, Hz
