AUTOMATIC DEVICE TO ADJUST VOLTAGE IN OVERHEAD CONTACT SYSTEM AND TRANSFORMER SUBSTATION Russian patent published in 2010 - IPC B60M3/02 H02M5/257 

FIELD: electrical engineering.

SUBSTANCE: proposed device comprises two units 1 and 2 to isolate limiting voltage in contact system, units 3 and 4 to measure voltage in said system, OR element 6, unit 16 to calculate voltage level at substation, transformer instruction shapes 17, contact system minimum voltage setters 7 and 8, current overload signal shaper 11, substation current overload unit 15, maximum current setter 14, substation voltage stabilisation signal shaper 10, substation voltage stabilisation signal setter 18, substation transformer voltage metre 19. It incorporates also unit 5 to generate stabilisation voltage up-signal, unit 9 to inhibit stabilisation voltage increase, unit 23 to generate substation voltage stabilization level decrease signal, unit 16 to compute substation voltage level, AND element (13), unit 20 to control stabilisation voltage minimum level, unit 21 to generate signal cancelling voltage stabilisation and cutting in switching unit that switches transformer over to natural characteristic, unit 22 to temporarily delay switching unit and switching unit 23.

EFFECT: possibility to adjust voltage in both overhead contact system and transformer station.

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