Power transformers are used to convert voltage from one level at the generation as step-up transformers to other levels at the end customers as step-down transformers. Power transformers are also used to change the phase angle of the voltage to control the flow of active power in the line. Changing voltage or phase angle cannot control active and reactive power flows independently. Sen Transformer (ST) marks the first breakthrough in bulk power system design in more than a century, hosting a range of benefits over traditional power flow solutions. The ST, which offers a plethora of power flow control features, such as independent active and reactive power flows, voltage, phase angle, impedance (XL or XC and R or –R, all independently variable), all in one unit, uses time‐tested components, such as transformer and load tap changers that are proven to be reliable, cost‐effective, and portable. While enhancing the active power flow to the line’s thermal limit, the reduction in reactive power flow leads to an efficient operation of the entire electrical grid. A commercial-grade ST was designed to operate at 33 kV with a throughput rating of ±6.5 MVA. The unit was manufactured, tested and connected to the U.S. grid in Lenox, MA. The test results show that the bidirectional active and reactive power flows can be regulated independently, proving that the ST is a practical solution to meet utilities’ needs in terms of reliability, cost-effectiveness, component non-obsolescence, efficiency, portability and interoperability. Speaker(s): Dr Kalyan Sen Virtual: https://events.vtools.ieee.org/m/556060
