A T-Connected Transformer and Three-leg VSC Based DSTATCOM for Power Quality Improvement

Modelling and Simulation of Current Source Converter based Dynamic Voltage Restorer for Voltage Regulation cum Harmonics Mitigation

“…This i d is added with the i d developed in equation (5). The reference source current can be obtained by using reverse Park's transformation process as discussed at [17]. The SPWM now can provide necessary gate drive signals for the GTO switches used in the model.…”

A review of distribution static compensator

“…T-connected transformer based topology is used with electronic load controller for a standalone induction generator used in small hydro power plant [91]. T-connected transformer based topology for PF correction, harmonics elimination, load balancing and neutral current compensation of linear/nonlinear, balanced/unbalanced loads is proposed in [30,92]. Zig-zag transformer based topology for PQ improvement in 3P4W distribution system is proposed in [93,94].…”

Current source converter based D-STATCOM for voltage sag mitigation

“…The SPWM switching strategy has constant switching frequency capability. This constant switching frequency reduces stress levels on the converter switches [16]. The control scheme will able to maintain constant voltage magnitude at the point where a sensitive load is connected under system disturbances.…”

“…The commonly used control schemes for the generation of reference source currents in most of the VSC based D-STATCOM include instantaneous reactive power theory (IRPT), synchronous reference frame theory (SRFT), unity power factor (UPF) based, instantaneous symmetrical components based, etc. [16] and then to d-q-0 frame by using the Park's transformation relation as:…”