A New Approach for Design and Analysis ofVoltage-Controlled DSTATCOM

Abstract

This project tends look at the solving the sag problems by usingcustom power devices such as Distribution Static compensator (D-STATCOM).Proposed scheme follows a newalgorithm to generate reference voltage for a distribution static compensator (DSTATCOM) operating involtage-control mode. The proposed scheme ensures that unity power factor (UPF) is achieved at the loadterminal during nominal operation, which is not possible in the traditional method. Also, the compensatorinjects lower currents therefore, reduces losses in the feeder and voltage-source inverter. Further, a saving inthe rating of DSTATCOM is achieved which increases its capacity to mitigate voltage sag. Nearly UPF ismaintained, while regulating voltage at the load terminal, during load change. The state-space model ofDSTATCOM is incorporated with the deadbeat predictive controller for fast load voltage regulation duringvoltage disturbances. With these features, this scheme allows DSTATCOM to tackle power-quality issues byproviding power factor correction, harmonic elimination, load balancing, and voltage regulation based on theload requirement.