Power flow control on 345 kV lines with the 200 MVA convertible static compensator

A 200 MVA, 345 kV system control FACTS device, consisting of two 100 MVA converters, two 100 MVA high voltage series transformers inserted in 345 kV transmission lines and a 200 MVA shunt transformer, was tested and utilized on a 345 kV network. This device, namely convertible static compensator (CSC), has four basic configurations: static synchronous compensator (STATCOM), static synchronous series compensator (SSSC), unified power flow controller (UPFC), and interline power flow controller (IPFC). The testing confirmed the device capability to operate in multiple configurations and its ability to control and regulate the power flows on two 345 kV transmission lines. The CSC test results confirmed its capability to regulate the substation bus voltage and line power flows under steady-state and dynamic conditions. The CSC flexibility allows to utilize it during normal as well as various emergency system conditions.