A 12-pulse static synchronous compensator for the distribution system employing the 3-level GTO-inverter

The paper presents an advanced scheme for the shunt compensation of the distribution system that can significantly improve the harmonic profile of the line without increasing the system complexity and size, The scheme employs a transformerless arrangement of 3-level GTO inverters that can generate a 5-level output. A gate control is developed that fully utilizes the capabilities of this arrangement to provide a 12-pulse operation for the compensator, The proposed compensator can connect directly to the distribution grid without a transformer, The effectiveness and performance of the proposed compensator are tested through simulated studies on a 13.8 kV distribution system.