Three-phase parallel type ferro-resonance device

摘要

1,136,642. Voltage stabilizers. YAWATA IRON & STEEL CO. Ltd. Feb. 2, 1966 [Feb. 5, 1965], No. 4569/66. Heading G3X. [Also in Division H2] A three phase ferro-resonant circuit for stabilizing the voltage at terminals U, V, W against variations in applied voltage from a source 4 or variations in load current comprises linear reactors 1, 2, 3 in the phase lines, these reactors being associated with a three phase capacitor circuit C, a three-phase saturable reactor circuit SR, and a filter circuit F connected in parallel as shown. The filter circuit F includes capacitors and linear reactors Fig. 8 (not shown) and is arranged to eliminate the disturbing effects of third harmonics in the system. The saturable reactor circuit SR has windings connected to supply a load at a frequency greater than the frequency of the source 4, and suitable arrangements for this circuit are described with reference to Figs. 3h and 3i (not shown). The linear reactors in the filter circuit F may be constituted by secondary windings of the reactors (1, 2, 3 Fig. 10, not shown). The source 4 may be associated with phase shifting circuits, so that it can be single-phase supplying a three phase load, or three phase supplying a single phase load Figs. 1b and 1d (not shown).