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

A technology of primary equipment and cut-off device, which is applied in the direction of circuit device, emergency protection circuit device, electronic protection circuit test, etc., can solve the problems of primary equipment false electrification, voltage transformer secondary winding, etc., to eliminate electrification and eliminate potential safety hazards , to meet the effect of remote test operation

Active Publication Date: 2017-08-22
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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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 t...

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

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Embodiment Construction

[0016] The present invention is described in detail below according to accompanying drawing:

[0017]A cut-off device for preventing substation relay maintenance and debugging primary equipment from being electrified, including a primary winding 2 and a secondary winding 3 of a voltage transformer 1, and one end of the secondary winding 3 passes through the first connecting piece 4, the air switch 8 and the third connecting piece in sequence. The sheet 6 is connected with one end of the relay protection device 10, and the other end of the secondary winding 3 is connected with the other end of the relay protection device 10 through the second connecting sheet 5 and the fourth connecting sheet 7 in sequence. A relay protection tester 9 is connected between the outer connection terminal of the connecting piece 6 and the outer connection terminal of the fourth connecting piece 7, and the relay protection tester external power supply 29 is connected to the relay protection tester 9....

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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...

Claims

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Application Information

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IPC IPC(8): H02H3/00G01R31/28
CPCG01R31/282G01R31/2827H02H3/003
Inventor 王亮李瑞阴崇智冯俊杰马振国白永前王爱民温卫强白瑞吕瑞王英涛王春明张健康
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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