To restore the load voltage, dynamic voltage restorer (DVR), which installed between the supply and a sensitive load, should inject voltage and active power from DVR to the distribution system during voltage sag. Due to the limit of energy storage capacity of DC link, it is necessary the minimize energy injection from DVR. In this paper the techniques of the supply voltage sag compensation in a...

This paper deals with the real-time transient calculation for large systems simulation using multiple network equivalents. A mixed simulation involving a study system and three network equivalents is carried out in Matlab to demonstrate the simultaneous simulation. The transient calculation for the study system and each network equivalent used different time steps. A comparison between the resu...

In this paper a new method has been proposed for calculating the frequency-dependent parameters of underground cables. The method uses full-wave formulation for calculating the modal electromagnetic fields and corresponding voltages and currents and then extracting frequency-dependent per-unitlength parameters of underground cables. The proposed method can be used for any cross-sectional shape ...

In this paper, expressions of the neutral conductor current in three-phase networks with compact fluorescent lamps (CFLs) are obtained from a CFL “black-box” model proposed in the literature. These expressions allow studying and performing a sensitivity analysis of the impact of CFLs on neutral current. The influence of CFL model parameters, as well as supply voltage unbalance, number of CFLs p...

In this paper, I reviewed comprehensively the structure and operation of closed-loop IFOGs, Feedback Erbium-doped fiber amplifier (EFDA) FOGs, called FE-FOG. The procedure of finding the Sagnac shift for closed-loop IFOG has been studied. The signal processing in the closed-loop IFOG was simulated using PSCAD software. In the closed-loop IFOG, the phase shift was derived through frequent use of...