CN203415965U - Inlet-wire and outlet-wire protection device for switching station - Google Patents

Inlet-wire and outlet-wire protection device for switching station Download PDF

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Publication number
CN203415965U
CN203415965U CN201320580462.6U CN201320580462U CN203415965U CN 203415965 U CN203415965 U CN 203415965U CN 201320580462 U CN201320580462 U CN 201320580462U CN 203415965 U CN203415965 U CN 203415965U
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China
Prior art keywords
terminal
outlet
inlet wire
switch
control unit
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Expired - Fee Related
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CN201320580462.6U
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Chinese (zh)
Inventor
张芳江
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Huzhou Tailun Electric Power Automation Engineering Co. Ltd.
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HUZHOU TAICANG ELECTRICITY POWER AUTOMATION ENGINEERING Co Ltd
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Abstract

The utility model discloses an inlet-wire and an outlet-wire protection device for a switching station. The inlet-wire and outlet-wire protection device comprises an inlet wire and a plurality of outlet-wire branch circuits, wherein the inlet wire is connected with a circuit breaker switch, each outlet-wire branch circuit is provided with a load switch, each load switch is connected with an outlet-wire protection measure-control device, the circuit breaker switch is connected with an inlet-wire protection measure-control device, each outlet-wire protection measure-control device is connected with an access switch rank which is formed by parallel connection of a plurality of access switches, and the access switch rank is outputted to the inlet-wire protection measure-control device. By adopting the inlet-wire and outlet-wire protection device, the load switch does not need to be replaced, the faulted outlet-wire branch circuit can be isolated when the outlet-wire branch circuit is in short circuit through a linked control way, the power supply of the non-fault outlet-wire branch circuits can be rapidly restored, and the power failure in a large range can be avoided.

Description

A kind of switchyard inlet wire and outlet wire protecting device
Technical field
The utility model relates to electric system protection device, particularly a kind of switchyard inlet wire and outlet wire protecting device.
Background technology
In switchyard, generally comprise inlet wire and some outlet branch roads, 10KV high pressure outputs to power consumer by each outlet branch road after inlet wire input.Traditional switchyard protection is at inlet wire connecting breaker switch, on every outlet branch road, all connects an on-load switch.Characteristic according to killer switch and on-load switch is known, and killer switch can cut off and connect load current and short circuit current circuit, but on-load switch cuts off and connect load current circuit only.Due to the progress of economical production, for the demand of electricity consumption, be soaring gradually gesture, the quantity of power consumer is also in continuous rising, so outlet branch road is also constantly to increase.Adopting under traditional switchyard protected mode, if there is an outlet branch road to occur short circuit current, need to inlet wire power supply be disconnected by killer switch, in the situation that power consumer quantity is constantly soaring, caused large-area power-cuts, had a strong impact on economical production.Moreover, generally, the on-load switch that outlet connects adopts fuse protected, and fuse just cannot be used after protection action completing once as disposable protection component, need replace, and has increased the cost that fuse buying and manpower are installed.Therefore there is scheme to propose, on-load switch on outlet branch road is all replaced to killer switch, can directly disconnect and have the outlet of short trouble branch road, but because the cost of killer switch will, far above on-load switch, can increase equipment cost if entirely change the on-load switch on outlet branch road into killer switch greatly.
Summary of the invention
Problem to be solved in the utility model is to provide a kind of switchyard inlet wire and outlet wire protecting device, can realize there being the outlet branch road of short trouble to carry out local power-off, recovers the power supply to the outlet branch road of non-fault.Avoided large-area power failure, reduced the economic loss cause because having a power failure, and without replacing original on-load switch, can not increase equipment cost.With digital protective relay, replace original fuse protectedly, saved the cost that purchase and manpower are installed fuse.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of switchyard inlet wire and outlet wire protecting device, comprise an inlet wire and some outlet branch roads, on described inlet wire, be connected with a killer switch, on described every outlet branch road, be all provided with on-load switch, each described on-load switch is all connected with an outlet protection measure and control device, described killer switch connects an incoming relay-protection measure and control device, described outlet protection measure and control device is all connected to one and opens by several opening on switch pair that switch in parallel forms, described opening into switch pair exports incoming relay-protection measure and control device to.
Preferably, described incoming relay-protection measure and control device and outlet protection measure and control device are digital protective relay system.
Preferably, in each outlet protection measure and control device, be equipped with outgoing line side current transformer and outgoing line side control unit, described incoming relay-protection measure and control device is provided with inlet wire side current transformer and inlet wire side control unit;
Outgoing line side current transformer: connect the outlet branch road at place, detect the current data on place outlet branch road and be sent in outgoing line side control unit;
Outgoing line side control unit: be connected to the action of on-load switch control overhead switch, and be connected to and open into switch pair, control the action of killer switch;
Inlet wire side current transformer: be connected on inlet wire, detect the current data of inlet wire and be sent in inlet wire side control unit;
Inlet wire side control unit: control the action of killer switch.
Preferably, in each outlet protection measure and control device, be equipped with an outgoing line side terminal board, comprise outlet intertrip terminal, outlet interlock combined floodgate terminal and outlet interlock are opened into terminal, described outlet intertrip terminal has two, be respectively the first terminal and the second terminal, outgoing line side control unit is connected to and opens into switch pair through the first terminal, and be connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is connected to the cue circuit of incoming relay-protection measure and control device through the second connecting terminals, described outlet interlock combined floodgate terminal also has two, be respectively the 3rd terminal and the 4th terminal, outgoing line side control unit is connected to and opens into switch pair through the 3rd connecting terminals, and be connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is also connected to the cue circuit of incoming relay-protection measure and control device through the 4th terminal, described outgoing line side control unit is opened into switch pair and is moved through the first terminal and the 3rd Terminal control respectively, described outgoing line side control unit sends the cue of intertrip and interlock combined floodgate through the second terminal and the 4th terminal respectively to the cue circuit of incoming relay-protection measure and control device simultaneously, the testing circuit that connects incoming relay-protection measure and control device into connecting terminals is opened in described outlet interlock, the operate condition of judgement killer switch, on described outgoing line side terminal board, be also provided with load tripping operation terminal and load detection terminal, described outgoing line side control unit sends separating brake instruction to on-load switch through load tripping operation terminal, control overhead switch motion, and outgoing line side control unit is through the operate condition of load detection terminal judgement on-load switch.
Preferably, in incoming relay-protection measure and control device, be provided with an inlet wire side terminal row, comprise busbar trip terminal, inlet wire intertrip terminal, inlet wire interlock combined floodgate terminal and inlet wire interlock are opened into terminal, the cue circuit of described incoming relay-protection measure and control device comprises inlet wire intertrip terminal and inlet wire interlock combined floodgate terminal, described the second terminal and the 4th terminal are connected to respectively inlet wire intertrip terminal and inlet wire interlock combined floodgate terminal, the testing circuit of described incoming relay-protection measure and control device comprises that inlet wire interlock opens into terminal, the inlet wire interlock that described outlet interlock is opened described in connecting into terminal is opened into terminal, described inlet wire side control unit connects killer switch through busbar trip terminal, control the action of killer switch.
Adopt after technique scheme, the utlity model has following advantage:
The interlock control mode cooperatively interacting by incoming relay-protection measure and control device, outlet protection measure and control device, killer switch and on-load switch, can be by the local isolation of the outlet branch road of fault, the power supply that recovers non-fault outlet branch road when outlet branch road is short-circuited.Avoid large-scale power failure, reduced the economic loss causing because having a power failure.On outlet branch road, still adopt traditional on-load switch, can not increase equipment cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the utility model switchyard inlet wire and outlet protection elementary diagram;
Fig. 2 is that winding diagram is controlled in the interlock of inlet wire and an outlet branch road.
Embodiment
For the inlet wire of switchyard and outlet protection, connecting breaker switch on inlet wire normally, connected load switch in outlet.Because on-load switch can only disconnect the faulty line that load current causes but cannot disconnect the faulty line causing because of short circuit current, if employing traditional approach, when short trouble appears in outlet branch road, killer switch tripping operation can cause the power failure of the whole power supply area of switchyard.
A kind of switchyard inlet wire of the present utility model and outlet wire protecting device, as shown in Figure 1-2, comprise an inlet wire 1 and some outlet branch roads 2, on described inlet wire 1, be connected with a killer switch, on described every outlet branch road 2, be all provided with on-load switch, each described on-load switch is all connected with an outlet protection measure and control device 4, described killer switch connects an incoming relay-protection measure and control device 3, described outlet protection measure and control device 4 is all connected to one and opens by several opening on switch pair that switch in parallel forms, described opening into switch pair exports incoming relay-protection measure and control device 3 to.When a certain outlet branch road fault that is short-circuited; outlet protection measure and control device 4 on place outlet branch road detects short-circuit signal, by incoming relay-protection measure and control device 3, outlet, is protected measure and control device 4, killer switch, on-load switch and is opened the outlet branch road 2 that short trouble appears in the interlock control mode isolation coordinating into the mutual logic of switch pair.The definition of described interlock control mode refers to according to the simple logic relation between controlled device and utilizes chain and barring condition that the control circuit of controlled device is interknited on request, to form a kind of specific logical relation, thereby realizes automatic operation.When outlet protection measure and control device 4 detects and judges place outlet branch road and is short-circuited fault; by sending and open into signal to opening into switch pair; intertrip instruction is sent to incoming relay-protection measure and control device 3; by incoming relay-protection measure and control device 3, control killer switch and trip, whole switchyard power supply area has a power failure.Because inlet wire does not have voltage; outlet branch road 2 does not have electric current; described incoming relay-protection measure and control device 3 sends opening into signal to opening into switch pair of intertrip detection; described opening into switch pair is connected to outlet protection measure and control device 4; described outlet protection measure and control device 4 sends separating brake instruction to on-load switch; on-load switch separating brake, the outlet branch road of fault is isolated.For not affecting the power supply of non-fault outlet branch road; described outlet protection measure and control device 4 sends and opens into signal to opening into switch pair; interlock reclosing command is sent to incoming relay-protection measure and control device 3; by incoming relay-protection measure and control device 3, control killer switch and close a floodgate, non-fault outlet branch road recovers normal power supply.Avoided large-scale power failure, reduced the economic loss causing because having a power failure, and still can adopt traditional on-load switch on outlet branch road, and without with killer switch as an alternative, reduced equipment cost.
In the protection of traditional switch station inlet wire 1 and outlet, killer switch configuration digital protective relay system, on-load switch configuration is fuse protected.Because fuse is disposable elements, after using, need to change.As a kind of preferred implementation, described incoming relay-protection measure and control device 3 and outlet protection measure and control device 4 are digital protective relay system.Digital protective relay system can repetitive operation utilization, and the cost of having saved original replacing fuse and having bought fuse has been avoided the input of repeated construction.
As an embodiment, in each outlet protection measure and control device 4, be equipped with outgoing line side current transformer and outgoing line side control unit.Described outgoing line side current transformer connects the outlet branch road 2 at place, detects the current data on place outlet branch road 2 and is sent in outgoing line side control unit.Described outgoing line side control unit is connected to the action of on-load switch control overhead switch, and is connected to and opens into switch pair, controls the action of killer switch.Described incoming relay-protection measure and control device 3 is provided with inlet wire side current transformer and inlet wire side control unit.Described inlet wire side current transformer is connected on inlet wire 1, detects the current data of inlet wire 1 and is sent in inlet wire side control unit.Described inlet wire side control unit is controlled the action of killer switch.The no-load voltage ratio of described inlet wire side current transformer is greater than the no-load voltage ratio of outgoing line side current transformer, and when outlet branch road 2 breaks down, fault current can first be crossed the overcurrent protection definite value in incoming relay-protection measure and control device, the first starting protection action of outlet protection measure and control device.The no-load voltage ratio of described current transformer refers to the current ratio between winding of current transformer and secondary winding.
As a preferred embodiment, specifically referring to Fig. 2, in each outlet protection measure and control device 4, be equipped with an outgoing line side terminal board, comprise that outlet intertrip terminal, outlet interlock combined floodgate terminal, outlet interlock are opened into terminal, terminal and the load detection terminal of tripping of loading.In incoming relay-protection measure and control device 3, be provided with an inlet wire side terminal row, comprise that busbar trip terminal, inlet wire intertrip terminal, inlet wire interlock combined floodgate terminal and inlet wire interlock open into terminal.
Described outlet intertrip terminal has two; be respectively the first terminal and the second terminal; outgoing line side control unit is connected to and opens into switch pair through the first terminal; and being connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is connected to the cue circuit of incoming relay-protection measure and control device through the second connecting terminals.Described outlet interlock combined floodgate terminal also has two; be respectively the 3rd terminal and the 4th terminal; outgoing line side control unit is connected to and opens into switch pair through the 3rd connecting terminals; and being connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is also connected to the cue circuit of incoming relay-protection measure and control device through the 4th terminal.Described outgoing line side control unit, respectively through the first terminal and the 3rd terminal intertrip and interlock reclosing command, is controlled and is opened intertrip and corresponding the cut-offfing into switch of opening of closing a floodgate of linking on switch pair.After closed connection of switch that has intertrip or interlock combined floodgate circuit to connect, described intertrip or interlock reclosing command are sent in the inlet wire side control unit of incoming relay-protection measure and control device.Described outgoing line side control unit sends the cue of intertrip and interlock combined floodgate through the second terminal and the 4th terminal respectively to the cue circuit of incoming relay-protection measure and control device simultaneously; at inlet wire side control unit, detect after the respective signal that the cue circuit of incoming relay-protection measure and control device sends; corresponding sending controling instruction, to killer switch, is controlled tripping operation or the combined floodgate of killer switch.The cue circuit of described incoming relay-protection measure and control device comprises inlet wire intertrip terminal and inlet wire interlock combined floodgate terminal, and described the second terminal and the 4th terminal are connected to respectively inlet wire intertrip terminal and inlet wire interlock combined floodgate terminal.The testing circuit that connects incoming relay-protection measure and control device into connecting terminals is opened in described outlet interlock, the operate condition of judgement killer switch.The testing circuit of described incoming relay-protection measure and control device comprises that inlet wire interlock opens into terminal, and described outlet interlock is opened and into terminal, connected described inlet wire interlock and open into terminal.On described outgoing line side terminal board, be also provided with load tripping operation terminal and load detection terminal, described outgoing line side control unit sends separating brake instruction to on-load switch through load tripping operation terminal, control overhead switch motion, and outgoing line side control unit is through the operate condition of load detection terminal judgement on-load switch.Described inlet wire side control unit connects killer switch through busbar trip terminal, controls the action of killer switch.Described opening into switch pair forms by opening into switch in parallel, when testing circuit carries out input, as long as one is opened into switch and opens into signal outgoing line side control unit all energy detected circuit that is connected with inlet wire side control unit are detected.
In this preferred embodiment, take model as TW816PZ incoming relay-protection measure and control device and TW816PZ outlet protection measure and control device be example, the step of described interlock control mode is as follows: the outgoing line side current transformer in outlet protection measure and control device detects and be sent to outgoing line side control unit, when outgoing line side control unit judgement place outlet branch road is short-circuited fault, outgoing line side control unit is connected to and opens into switch pair through the first terminal, and be connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is connected to inlet wire intertrip terminal through the second connecting terminals simultaneously, inlet wire side control unit sends trip command after the intertrip signal that inlet wire intertrip terminal detected, killer switch tripping operation, cut off the power supply of the whole power supply area of switchyard.For avoiding misoperation, described inlet wire side control unit links to open into terminal by inlet wire and connects killer switch, judges whether killer switch trips, and by inlet wire side instrument transformer, detects the current signal of inlet wire.Judging that after killer switch has tripped, sending trip command leaves into terminal to outgoing line side control unit through outlet interlock, outgoing line side control unit sends separating brake instruction to on-load switch through load tripping operation terminal, on-load switch separating brake, the be short-circuited outlet branch road of fault of place disconnects power supply.For avoiding misoperation, whether outgoing line side control unit through the detection terminal detection load switch separating brake of loading, after judgement on-load switch separating brake, outgoing line side control unit is connected to and opens into switch pair through the 3rd connecting terminals, and be connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is connected to inlet wire interlock combined floodgate terminal through the 4th connecting terminals simultaneously, and inlet wire side control unit sends reclosing command after the interlock switching signal that inlet wire interlock combined floodgate terminal detected, and killer switch closes a floodgate.For avoiding misoperation, described inlet wire side control unit links to open into terminal by inlet wire and connects the switching signal that killer switch detects killer switch.
In the inlet wire of switchyard and outlet, also there is the fault that on busbar fault (being so-called inlet wire fault) and outlet branch road, load current causes.Described busbar fault is mainly detected the fault-signal of inlet wire by inlet wire side current transformer, and is sent to inlet wire side control unit, and inlet wire side control unit sends trip command through busbar trip terminal, controls killer switch tripping operation.Load current fault on outlet branch road mainly detects the load current on outlet branch road by outgoing line side current transformer, and be sent to outgoing line side control unit, outgoing line side control unit, when judgement load current fault, sends separating brake instruction through load tripping operation Terminal control on-load switch separating brake.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.

Claims (5)

1. a switchyard inlet wire and outlet wire protecting device, comprise an inlet wire (1) and some outlet branch roads (2), described inlet wire is connected with a killer switch on (1), on described every outlet branch road (2), be all provided with on-load switch, it is characterized in that: each described on-load switch is all connected with an outlet protection measure and control device (4), described killer switch connects an incoming relay-protection measure and control device (3), described outlet protection measure and control device is all connected to one and opens by several opening on switch pair that switch in parallel forms, described opening into switch pair exports incoming relay-protection measure and control device to.
2. switchyard inlet wire according to claim 1 and outlet wire protecting device, is characterized in that: described incoming relay-protection measure and control device (3) and outlet protection measure and control device (4) are digital protective relay system.
3. switchyard inlet wire according to claim 2 and outlet wire protecting device, it is characterized in that: in each outlet protection measure and control device (4), be equipped with outgoing line side current transformer and outgoing line side control unit, described incoming relay-protection measure and control device (3) is provided with inlet wire side current transformer and inlet wire side control unit;
Outgoing line side current transformer: connect the outlet branch road (2) at place, detect the current data on place outlet branch road (2) and be sent in outgoing line side control unit;
Outgoing line side control unit: be connected to the action of on-load switch control overhead switch, and be connected to and open into switch pair, control the action of killer switch;
Inlet wire side current transformer: be connected to inlet wire (1) upper, detect the current data of inlet wire (1) and be sent in inlet wire side control unit;
Inlet wire side control unit: control the action of killer switch.
4. switchyard inlet wire according to claim 3 and outlet wire protecting device, it is characterized in that: in each outlet protection measure and control device (4), be equipped with an outgoing line side terminal board, comprise outlet intertrip terminal, outlet interlock combined floodgate terminal and outlet interlock are opened into terminal, described outlet intertrip terminal has two, be respectively the first terminal and the second terminal, outgoing line side control unit is connected to and opens into switch pair through the first terminal, and be connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is connected to the cue circuit of incoming relay-protection measure and control device through the second connecting terminals, described outlet interlock combined floodgate terminal also has two, be respectively the 3rd terminal and the 4th terminal, outgoing line side control unit is connected to and opens into switch pair through the 3rd connecting terminals, and be connected to inlet wire side control unit by opening into switch pair, outgoing line side control unit is also connected to the cue circuit of incoming relay-protection measure and control device through the 4th terminal, described outgoing line side control unit is opened into switch pair and is moved through the first terminal and the 3rd Terminal control respectively, described outgoing line side control unit sends the cue of intertrip and interlock combined floodgate through the second terminal and the 4th terminal respectively to the cue circuit of incoming relay-protection measure and control device simultaneously, the testing circuit that connects incoming relay-protection measure and control device into connecting terminals is opened in described outlet interlock, the operate condition of judgement killer switch, on described outgoing line side terminal board, be also provided with load tripping operation terminal and load detection terminal, described outgoing line side control unit sends separating brake instruction to on-load switch through load tripping operation terminal, control overhead switch motion, and outgoing line side control unit is through the operate condition of load detection terminal judgement on-load switch.
5. switchyard inlet wire according to claim 4 and outlet wire protecting device, it is characterized in that: in incoming relay-protection measure and control device (3), be provided with an inlet wire side terminal row, comprise busbar trip terminal, inlet wire intertrip terminal, inlet wire interlock combined floodgate terminal and inlet wire interlock are opened into terminal, the cue circuit of described incoming relay-protection measure and control device comprises inlet wire intertrip terminal and inlet wire interlock combined floodgate terminal, described the second terminal and the 4th terminal are connected to respectively inlet wire intertrip terminal and inlet wire interlock combined floodgate terminal, the testing circuit of described incoming relay-protection measure and control device comprises that inlet wire interlock opens into terminal, the inlet wire interlock that described outlet interlock is opened described in connecting into terminal is opened into terminal, described inlet wire side control unit connects killer switch through busbar trip terminal, control the action of killer switch.
CN201320580462.6U 2013-09-18 2013-09-18 Inlet-wire and outlet-wire protection device for switching station Expired - Fee Related CN203415965U (en)

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CN201320580462.6U CN203415965U (en) 2013-09-18 2013-09-18 Inlet-wire and outlet-wire protection device for switching station

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Application Number Priority Date Filing Date Title
CN201320580462.6U CN203415965U (en) 2013-09-18 2013-09-18 Inlet-wire and outlet-wire protection device for switching station

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103532111A (en) * 2013-09-18 2014-01-22 湖州泰仑电力自动化工程有限公司 Incoming line and outgoing line protector of switching station

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103532111A (en) * 2013-09-18 2014-01-22 湖州泰仑电力自动化工程有限公司 Incoming line and outgoing line protector of switching station
CN103532111B (en) * 2013-09-18 2016-08-17 湖州泰仑电力自动化工程有限公司 A kind of switchyard inlet wire and outlet wire protecting device

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Address after: 313000 Wuxing, Huzhou District, dedicated road, No. 988 on the third floor of the

Patentee after: Huzhou Tailun Electric Power Automation Engineering Co. Ltd.

Address before: 313000 Zhejiang, Huzhou, Wuxing District, dedicated road, building 988, No. 5

Patentee before: Huzhou Taicang Electricity Power Automation Engineering Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140129

Termination date: 20180918