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Table 3 Low voltage ride through parameters of voltage asymmetric sag

From: A novel low voltage ride through strategy for cascaded power electronic transformer

  Variable No load Full load
Rectified state Inverter state
Before Voltage sag \( {P}^{\ast}\left({i}_{d0}^{\ast}\right) \) 0 1 −1
\( {Q}^{\ast}\left({i}_{q0}^{\ast}\right) \) 0 0 0
After Voltage Sag α = 0.4 \( {i}_{d+}^{+\ast } \) 0 1.112 −1.112
\( {i}_{q+}^{+\ast } \) 0.45 0.45 0.45
\( {i}_{d-}^{-\ast } \) 0 0 0
\( {i}_{q-}^{-\ast } \) 0 0 0