METHOD OF AUTOMATIC RECLOSING (AR) OF THE SUPPLY LINES OF CONTACT NETWORK OF DOUBLE-TRACK SECTION OF 25 kV SYSTEM WITH SECTIONING POINT AT DISCONNECTORS Russian patent published in 2023 - IPC G01R31/00 

FIELD: automating power supply of AC electric railways.

SUBSTANCE: invention is related to automating switches for supply lines of a contact network with sectioning posts on disconnectors. The method of automatic reclosing (AR) of the supply lines of contact network of the double-track section of 25 kV system with sectioning point at disconnectors operates based on the magnitude of the induced voltage and uses the first voltage transformer installed on the switch from the side of the first supply line of the contact network to control the induced voltage in disconnected contact network, and the second voltage transformer installed on the switch from the side of the second adjacent supply line of the contact network. After the emergency shutdown of the switches of the first and second supply lines of the contact network of the substation and disconnection of all controlled disconnectors of the sectioning station during the non-powered pause, the induced voltage in the contact network (Unav.f1, Unav.f2) is measured by the installed voltage transformers. The validity of the following inequations is determined:

Unav.f1≥Unav.o1, (1) Unav.f2≥Unav.o2, (2),

where Unav.o1, Unav.o2 - the initial conditions of the induced voltage on the first and second supply lines of the contact network. When inequations (1) and (2) are fulfilled, the switches of the supply lines of the contact network are switched on by AR2. Otherwise, AR2 prohibition is set for the circuit breaker for which inequations (1) or (2) are not observed.

EFFECT: increased reliability of automatic reclosing (AR) of the supply lines of the AC contact network of the double-track section in case of emergency disconnection of the contact network.

1 cl, 1 dwg