DEVELOPMENT OF STATIC VOLTAGE FLUCTUATION COMPENSATOR FOR AC ELECTRIC RAILWAY USING SELF-COMMUTATED INVERTERS

RPC (Railway Static Power Conditioner) is a static voltage compensator to avoid a voltage fluctuation of 3-phase power grid under an AC electric railway load. Normally, in Japan, 3-phase electric power is transferred to paired directional single-phase feeding circuits. At a substation, RPC links directional feeding circuits using two self-commutated inverters and RPC accommodates and active power of these circuits to balance 3-phase power and compensates a reactive power to regulate a 3-phase voltage fluctuation. At a sectioning post, it can reduce voltage drop using a reactive power. Also, it can act as an active filter to compensate harmonics. This paper reports on the successful results of tests using a small model of RPC and dummy loads such as thyristor phase controlled car.