Unique Capabilities of Sen Transformer: a Power Flow Regulating Transformer

Two decades ago, a renewed interest in the development of power flow control technology resulted in the creation of unified power flow controller (UPFC) with the use of voltage-sourced converters due to the availability of high power semiconductor switches, such as 4500 V, 4000 A-rated Gate Turn-Off thyristors. Lessons learned from this experience continue to reinforce the true needs of a power flow controller, i.e., high reliability, high efficiency, low-cost, component non-obsolescence, high power density, interoperability and portability while providing the optimal power flow control capability. The Sen transformer (ST) provides these qualities while enhancing the controllability in an electric power grid by using functional requirements and cost-effective solutions. Utilities that are looking for ways to enhance the controllability in their power grid by voltage regulation, phase angle regulation, line impedance regulation, fault-current limitation, and much more can benefit from using the ST.