Series power line compensator using self-commutated inverter

A novel power line compensator is proposed, which has an inverter connected to a power transmission line in series, One of the advantages of this compensator is to compensate even the voltage drop which occurs in the power supply side of the transmission line, which needs a larger capacity for the SVC. The operating principle and control systems of this compensator are described in this paper. The protective method of the compensator is also treated. The validity of this compensator and its control system are examined by experimental tests, including static and transient characteristics, harmonic effects and the protective functions.