Distributed power flow controller design based-on ETO-light converter

Static synchronous series compensator (SSSC) is one of the solid state power electronics technology based flexible AC transmission system (FACTS) devices which is effective to control the active power flow across the transmission lines by altering or changing the characteristic impedance of power line. However its widespread application is still limited by high costs, low reliability and long build cycle. In this paper, a new ETO light converter based series compensating distributed power flow controller (DPFC) is introduced. The proposed single phase modular power flow controller system combines modular converter, modular heat-pipe and modular digital interface designs to achieve modular single phase control. It has intelligent functions such as the self-power and self-protection. Its interfaces are fully optical fibers and simple for connection. The modular DPFC makes it possible to have the transformerless connection to the existing power grid. These specific designs reduce the cost and increase the reliability greatly and introduce significant benefits to the power system. The proposed power flow controller system is verified by a single-phase power transmission system.