CN207398824U - A kind of busbar protective device for eliminating busbar dead zone - Google Patents

Abstract

The utility model discloses a kind of busbar protective devices for eliminating busbar dead zone, and in primary equipment, I sections of busbares, DL1, mother, DL2 and II sections of busbares are sequentially connected；Detection module connects the input terminal with door module, and CK1 and CK2 are connected to two output terminals with door module；Detection module detects I sections of busbares, II sections of busbares, mother DL1 sides and the fault-signal of mother DL2 sides, and fault-signal is sent to and door module；With door module when receiving the fault-signal of I sections of busbares and mother DL1 sides, shutoff signal is sent to CK1 in the given time, after CK1 receives shutoff signal, by CZ1 DL1 is controlled to disconnect.A kind of busbar protective device for eliminating busbar dead zone of the utility model; two busbares are isolated by two breakers; during so that busbar breaking down; it only needs to carry out failure removal to a busbar; and the operation that another busbar can continue, whole station bus loss of pressure will not be caused and extend fault clearing time.

Description

A kind of busbar protective device for eliminating busbar dead zone

Technical field

The utility model is related to power engineering fields, and in particular to a kind of busbar protective device for eliminating busbar dead zone.

Background technology

Busbar is one of element mostly important in power transmission and transforming equipment, it is contemplated that the reliability of system operation, 220kV busbares Mostly use double bus scheme mode.Although modern Microcomputer Protection technology is quite ripe, in existing bus protection Still there is a big difficult point, that is, during busbar dead-zone fault (breaking down between busbar breaker and mother CT), bus differential protection Failure can not be still cut off, it is necessary to another busbar ability of tripping that is delayed again after action tripping fault bus and busbar breaker Cut off failure.Whole station bus loss of pressure had so both been caused, has also extended the mute time of failure, to the safe and stable operation shadow of power grid Sound is larger.

Utility model content

Technical problem to be solved in the utility model is in existing technology of transmission of electricity, and the discharge of busbar dead-zone fault is needed It disconnects fault bus and is delayed and disconnect another busbar, cause whole station bus loss of pressure, the mute time of failure is extended, to power grid Safe and stable operation be affected, and it is an object of the present invention to provide a kind of busbar protective device for eliminating busbar dead zone, solves above-mentioned asks Topic.

The utility model is achieved through the following technical solutions：

A kind of busbar protective device for eliminating busbar dead zone, including detection module and door module, I sections of bus differential mothers CK1, II sections of outlet bus differential mother outlet CK2, the first connector LJ1, the second connector LJ2, the first mother operator CZ1, the second mother operator CZ2, the first breaker DL1 and the second breaker DL2；Described CK1, LJ1, CZ1 and DL1 connect successively It connects, described CK2, LJ2, CZ2 and DL2 are sequentially connected；In primary equipment, I sections of busbares, DL1, mother, DL2 and II sections of busbares according to Secondary connection；The detection module connection and the input terminal of door module, the CK1 and CK2 are connected to two with door module Output terminal；The detection module detects I sections of busbares, II sections of busbares, mother DL1 sides and the fault-signal of mother DL2 sides, and will be former Barrier signal is sent to and door module；Described and door module is when receiving the fault-signal of I sections of busbares and mother DL1 sides, predetermined Shutoff signal is sent to CK1 in time, after CK1 receives shutoff signal, by CZ1 DL1 is controlled to disconnect；It is described to be received with door module During to II sections of busbares and the fault-signal of mother DL2 sides, shutoff signal is sent to CK2 in the given time, CK2 receives cut-out letter After number, by CZ2 DL2 is controlled to disconnect.

In the prior art, the discharge of busbar dead-zone fault is needed to disconnect fault bus and be delayed to disconnect another busbar, is led Whole station bus loss of pressure is caused, the mute time of failure is extended, is affected to the safe and stable operation of power grid.The utility model should Used time when there is busbar dead-zone fault, checks the fault type of busbar by detection module that detection mode uses base You carry out at Hough current law, belong to existing highly developed detection technique；Detection module detects I sections of busbares and mother During the failure of DL1 sides, by being controlled with door module, when the signal of two kinds of failures is received with door module, DL1 is cut off by CK1, It will not cause whole station bus loss of pressure and extend fault clearing time, and when detection module detects II sections of busbares and mother DL2 sides Failure when, by being controlled with door module, when the signal of two kinds of failures is received with door module, DL2 is cut off by CK2, also not It can cause whole station bus loss of pressure and extend fault clearing time；So as to be isolated by two breakers to two busbares, make Busbar when breaking down, it is only necessary to carry out failure removal to a busbar, and the operation that another busbar can continue, will not It causes whole station bus loss of pressure and extends fault clearing time.

Further, the utility model further includes the branch breaker for being arranged at busbar branch road；It is described to exist with door module When receiving the fault-signal of I sections of busbares and mother DL1 sides, shutoff signal, branch are sent to branch breaker in the given time Breaker disconnects after receiving shutoff signal；It is described with door module when receiving the fault-signal of II sections of busbares and mother DL2 sides, Shutoff signal is sent to branch breaker in predetermined time, branch breaker disconnects after receiving shutoff signal.

The utility model in application, in order to ensure the safety of busbar and mother, it is described with door module receive I sections of busbares and During the fault-signal of mother DL1 sides, shutoff signal is sent to branch breaker in the given time, branch breaker receives cut-out It is disconnected after signal；Described and door module is when receiving the fault-signal of II sections of busbares and mother DL2 sides, in the given time to branch Circuit breaker sends shutoff signal, and branch breaker disconnects after receiving shutoff signal, so that branch breaker will not be to whole A busbar impacts, and improves the security of busbar.

Further, it is described to include at least two and gate control circuit with door module；The I sections that the detection module detects Busbar and the same input terminal with gate control circuit of mother DL1 sides fault-signal access, and it is somebody's turn to do the output with gate control circuit Terminate CK1；The II section busbares and mother DL2 sides fault-signal that the detection module detects access same and gate control circuit Input terminal, and should and gate control circuit output termination CK2.

Further, it is described to use 7409TTL tetra- and door chip with door module.

Further, the predetermined time uses 15~30ms.

Described above and door module and detection module are the prior art, and the utility model organically combines it one It rises, realizes new technique effect.

The utility model compared with prior art, has the following advantages and advantages：

A kind of busbar protective device for eliminating busbar dead zone of the utility model, carries out two busbares by two breakers Isolation so that when busbar breaks down, it is only necessary to carry out failure removal to busbar, and the fortune that another busbar can continue Row will not cause whole station bus loss of pressure and extend fault clearing time.

Description of the drawings

Attached drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application Part does not form the restriction to the utility model embodiment.In the accompanying drawings：

Fig. 1 is the utility model structure diagram.

Specific embodiment

For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to embodiment and attached drawing, The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this Utility model is not intended to limit the scope of the present invention.

Embodiment 1

As shown in Figure 1, a kind of busbar protective device for eliminating busbar dead zone of the utility model, including detection module and door Module, I sections of bus differential mothers export CK1, II sections of bus differential mother outlet CK2, the first connector LJ1, the second connectors LJ2, the first mother operator CZ1, the second mother operator CZ2, the first breaker DL1 and the second breaker DL2；The CK1, LJ1, CZ1 and DL1 are sequentially connected, and described CK2, LJ2, CZ2 and DL2 are sequentially connected；In primary equipment, I sections of busbares, DL1, mothers Connection, DL2 and II sections of busbares are sequentially connected；The detection module connection and the input terminal of door module, the CK1 and CK2 connect respectively It is connected to two output terminals with door module；The detection module detects I sections of busbares, II sections of busbares, mother DL1 sides and mother DL2 The fault-signal of side, and fault-signal is sent to and door module；It is described to receive I sections of busbares and mother DL1 sides with door module Fault-signal when, in the given time to CK1 send shutoff signal, after CK1 receives shutoff signal, by CZ1 control DL1 break It opens；Described and door module is cut when receiving the fault-signal of II sections of busbares and mother DL2 sides to CK2 transmissions in the given time Break signal after CK2 receives shutoff signal, controls DL2 to disconnect by CZ2.

When the present embodiment is implemented, when there is busbar dead-zone fault, the fault type of busbar is carried out by detection module It checks, detection mode is carried out using Kirchhoff's current law (KCL), belongs to existing highly developed detection technique；Detection module is examined When measuring the failure of I sections of busbares and mother DL1 sides, by being controlled with door module, the signal of two kinds of failures is received with door module When, DL1 is cut off by CK1, whole station bus loss of pressure will not be caused and extend fault clearing time, and when detection module detects II During the failure of section busbar and mother DL2 sides, by being controlled with door module, when the signal of two kinds of failures is received with door module, lead to CK2 cut-out DL2 are crossed, whole station bus loss of pressure will not be caused and extend fault clearing time；Thus by two breakers to two A busbar is isolated so that when busbar breaks down, it is only necessary to failure removal is carried out to a busbar, and another busbar can With the operation of continuation, whole station bus loss of pressure will not be caused and extend fault clearing time.

Embodiment 2

The present embodiment further includes the branch breaker for being arranged at busbar branch road on the basis of embodiment 1；Described and door Module sends cut-out letter to branch breaker in the given time when receiving the fault-signal of I sections of busbares and mother DL1 sides Number, branch breaker disconnects after receiving shutoff signal；It is described to believe with door module in the failure for receiving II sections of busbares and mother DL2 sides Number when, send shutoff signal to branch breaker in the given time, branch breaker disconnects after receiving shutoff signal.It is described with Door module includes at least two and gate control circuit；The I section busbares and mother DL1 sides fault-signal that the detection module detects Same and gate control circuit input terminal is accessed, and CK1 should be terminated with the output of gate control circuit；The detection module detection The same input terminal with gate control circuit of II section busbares and mother DL2 sides fault-signal access arrived, and should be with gate system electricity The output termination CK2 on road.It is described to use 7409TTL tetra- and door chip with door module.The predetermined time uses 15~30ms.

It is described to receive I sections of busbares and mother with door module in order to ensure the safety of busbar and mother when the present embodiment is implemented When joining the fault-signal of DL1 sides, shutoff signal is sent to branch breaker in the given time, branch breaker receives cut-out letter It is disconnected after number；Described and door module is when receiving the fault-signal of II sections of busbares and mother DL2 sides, in the given time to branch Breaker sends shutoff signal, and branch breaker disconnects after receiving shutoff signal, so that branch breaker will not be to entire Busbar impacts, and improves the security of busbar.

Above-described specific embodiment, the purpose of this utility model, technical solution and advantageous effect have been carried out into One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit Determine the scope of protection of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced It changes, improve, should be included within the scope of protection of this utility model.

Claims (5)

1. a kind of busbar protective device for eliminating busbar dead zone, which is characterized in that including detection module and door module, I sections of busbares Differential mother exports CK1, II sections of bus differential mother outlet CK2, the first connector LJ1, the second connector LJ2, the first mothers Operator CZ1, the second mother operator CZ2, the first breaker DL1 and the second breaker DL2；Described CK1, LJ1, CZ1 and DL1 It is sequentially connected, described CK2, LJ2, CZ2 and DL2 are sequentially connected；In primary equipment, I sections of busbares, DL1, mother, DL2 and II sections Busbar is sequentially connected；The detection module connection and the input terminal of door module, the CK1 and CK2 are connected to and door module Two output terminals；The detection module detects I sections of busbares, II sections of busbares, mother DL1 sides and the fault-signal of mother DL2 sides, And fault-signal is sent to and door module；It is described with door module when receiving the fault-signal of I sections of busbares and mother DL1 sides, Shutoff signal is sent to CK1 in the given time, after CK1 receives shutoff signal, by CZ1 DL1 is controlled to disconnect；Described and door mould Block sends shutoff signal to CK2 in the given time when receiving the fault-signal of II sections of busbares and mother DL2 sides, and CK2 is received After shutoff signal, by CZ2 DL2 is controlled to disconnect.

2. a kind of busbar protective device for eliminating busbar dead zone according to claim 1, which is characterized in that further include setting Branch breaker in busbar branch road；It is described with door module when receiving the fault-signal of I sections of busbares and mother DL1 sides, Shutoff signal is sent to branch breaker in predetermined time, branch breaker disconnects after receiving shutoff signal；Described and door module When receiving the fault-signal of II sections of busbares and mother DL2 sides, shutoff signal, branch are sent to branch breaker in the given time Circuit breaker disconnects after receiving shutoff signal.

A kind of 3. busbar protective device for eliminating busbar dead zone according to claim 1, which is characterized in that described and door mould Block includes at least two and gate control circuit；I section busbares and mother DL1 sides the fault-signal access that the detection module detects The same input terminal with gate control circuit, and CK1 should be terminated with the output of gate control circuit；What the detection module detected II sections of busbares and the same input terminal with gate control circuit of mother DL2 sides fault-signal access, and should be with gate control circuit Output termination CK2.

A kind of 4. busbar protective device for eliminating busbar dead zone according to claim 1, which is characterized in that described and door mould Block is using 7409TTL tetra- and door chip.

A kind of 5. busbar protective device for eliminating busbar dead zone according to claim 1, which is characterized in that the pre- timing Between use 15~30ms.