Table 2 Parameters of the controllers.

From: Enhanced grid current and DC voltage regulations for three level four leg rectifier DC microgrid under uncertainty and disturbances

Symbol

Quantity

Value

\({\omega }_{eso}^{v}\)

Bandwidth of the FOESO-based OVCL

293 rad/s

\({\omega }_{c,sef}^{v}\)

Bandwidth of the SEFL-based OVCL

60 rad/s

\({\omega }_{eso}^{i}\)

Bandwidth of the FOESO-based IGSCCL

8792 rad/s

\({\omega }_{c,sef}^{i}\)

Bandwidth of the SEFL-based IGSCCL

2930 rad/s

\({\alpha }_{v1}\), \({\alpha }_{v2}\)

Fractional orders of the FOESO-based OVCL

−0.52, −0.57

\({k}_{1}^{v}\),\({k}_{2}^{v}\)

Coefficients of the FOESO-based OVCL

80, 84

\({\alpha }_{i1}\), \({\alpha }_{i2}\)

Fractional orders of the FOESO-based IGSCCL

−0.58, −0.64

\({k}_{1}^{i}\),\({k}_{2}^{i}\)

Coefficients of the FOESO-based IGSCCL

100, 911