Question

Explain working of UPFC with the help of basic schematic diagram.

Answer 1

Figure 3 shows a UPFC circuit consisting of two Voltage Source Converter (VSC) connected to each other with a common capacitor bank which works as a DC link. When one side of the presented topology is installed shunt with the transmission line and another side is attached in series to the Compensator (STATCOM) is used to provide reactive power to the AC power system [18], besides that, it will provide the dc power required for both inverter. Due to the small capacity of the DC link, the active power drawn by the SSSC must be matched to the reactive power engendered by the STATCOM