Cutoff device and cutoff method for preventing electrification of primary equipment during relay protection debugging of substation

Abstract

The invention discloses a cutoff device and cutoff method for preventing electrification of primary equipment during relay protection debugging of a substation, and solves the problem of electrification by mistake of the primary equipment during the relay protection debugging of the substation. A closed detection loop comprises a detection circuit microprocessor (20), a voltage relay normally-open contact (14) and a detection circuit power supply (19), a current relay normally-closed contact (26) is connected in series to a connection line between a relay protection tester (9) and a relay protection tester external power supply (29), a cutoff circuit power supply (28), a current relay coil (25) and a triode switch (24) are connected in series to form a cutoff loop, an output control end of a cutoff circuit microprocessor (23) is connected to a base of the triode switch (24), and a cutoff signal is used for controlling the triode switch (24) to be conducted and the current relay normally-closed contact (26) to be disconnected by the cutoff circuit microprocessor (23).

Description

technical field [0001] The invention relates to a device and a method for cutting off the false electrification of primary equipment during the commissioning process of substation relay protection. The safety of primary equipment installation and commissioning personnel will be seriously endangered after the primary equipment is electrified by mistake. Background technique [0002] The electrical equipment of the substation is divided into primary equipment and secondary equipment. Primary equipment refers to equipment that directly transmits and distributes electrical energy, including transformers, circuit breakers, busbars, transmission lines, etc. Secondary equipment refers to equipment that detects, controls, regulates and protects primary equipment, including measurement control devices, meters, and relay protection devices. Primary equipment and its interconnected circuits are called primary circuits. Secondary equipment and its interconnected circuits are called s...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a cut-off device and a cut-off method for preventing primary equipment from being electrified for substation relay protection debugging, and solves the technical problem that the secondary winding of a voltage transformer and the primary equipment are erroneously electrified due to the misoperation of the debugger during the debugging of the relay protection of the substation

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