LONG-DISTANCE POWER TRANSFER DEVICE IN THREE-PHASE SYSTEM Russian patent published in 2010 - IPC H02J3/00 

FIELD: electrical engineering.

SUBSTANCE: proposed device comprises line of delay at the start of phase A with 2/3 f signal time shift and line of delay at the start of phase B with 1/3 f signal time shift to make delay lines output phase shift between voltage in circuits of phases A, B and C equal to zero. Line end phase C comprises delay line with time signal shift of 2/3 f, and line end phase B comprises delay line with time signal shift of 1/3 f. Said delay lines represent single-phase cables with coaxial layer fitted in tubes made from magnetically soft material and arranged zigzag like with band angle of 180° in several parallel runs. Said tubes are furnished with biasing windings receiving signal from measuring transformers mounted at delay line output. Tubes are made from isolated lengthwise layers. Note here that the number of tubes of each phase is multiple of four, and phase cable is laid through adjacent tubes alternately in various layer of a stack so that current direction in cables of every pair in adjacent tubes of stack every layer coincides and biasing windings envelope the sides of adjacent tubes wherein current direction coincides.

EFFECT: higher efficiency of power transfer and expanded operating performances.

3 cl, 6 dwg