CN209358241U - A kind of internal bridge stub protection adaptively throws the control circuit moved back - Google Patents
A kind of internal bridge stub protection adaptively throws the control circuit moved back Download PDFInfo
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- CN209358241U CN209358241U CN201821576567.3U CN201821576567U CN209358241U CN 209358241 U CN209358241 U CN 209358241U CN 201821576567 U CN201821576567 U CN 201821576567U CN 209358241 U CN209358241 U CN 209358241U
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Abstract
The utility model discloses a kind of internal bridge stub protections adaptively to throw the control circuit moved back; it include that isolation switch input control electric power loop, isolation switch weight motor type relay take electric control loop and stub protection adaptively to throw to move back control loop; this control circuit can prevent that the normally closed auxiliary contact of main transformer high-pressure side disconnecting switch and its secondary circuit mislead in operation or wrong diagnosis opens and stub protection miscarrying is caused to move back; meet remote operation control simultaneously to require, safety control circuit is increased to stub protection isolation switch open entry loop.
Description
Technical field
The present invention relates to a kind of safety control circuit, especially a kind of internal bridge stub protection adaptively throws the control moved back
Circuit processed.
Background technique
In recent years, Full remote controlled business functionization is widelyd popularize in electric system, and remote control technology covers secondary device, in order to advise
Model secondary device remote operation, it is desirable that protection equipment remote control need to use soft remote control mode, the hard pressure in protection device context outlet
Plate and remote operation investment hard pressing plate by following principle should throw and moved back in investment position, defencive function hard pressing plate:
(1) distant place is required to move back soft pressing plate using throwing to throw surrender shield, when soft or hard pressing plate is "AND" logic, live function is hard
Pressing plate is always in investment position, and when soft or hard pressing plate is "or" logic, live function hard pressing plate is releasing position always.
(2) claimed function follows outside to open automatically and moves back into contact variation throwing, opens when outside and presses firmly into contact with function
When plate is "or" logic, live hard pressing plate is releasing position always；Opening when outside into contact and function hard pressing plate is "AND" logic
When, live hard pressing plate is always in investment position.
Using defencive function follow automatically it is external open contact variation throw move back by the way of and we be commonly called as it is " adaptive
Answer " mode.Stub protection is exactly by the disconnecting link auxiliary normally closed contact automatic switching for drawing interval in power grid at present.
220 220 kilovolts of kv substation system main electrical schemes are expanded inter-bridge connection, and main electrical scheme is illustrated in fig. 1 shown below, in order to
The reliability for improving system power supply, when any main transformer stops labour maintenance, 220 kilovolts of systems still retain full mode and run, thus
220 kilovolts of system doublings are configured with 6 sets of stub protections, i.e., between 1DL and 3DL, between 3DL and 4DL, 2DL and 4DL it
Between respectively configure two sets of stub protections, corresponding stub protection is thrown automatically when each main transformer high-pressure side isolation switch Ge is disconnected
Enter.
When any main transformer body maintenance in scene, three side breaker of main transformer should be first disconnected, then disconnects the isolation of main transformer high-pressure side
Switch Ge that is, by disconnection 1Ge, 2Ge or 3Ge disconnecting switch, then restores 220 kilovolts of breakers operations, to realize maintenance master
220 kilovolts of systems is effectively isolated in becoming ontology and running.
220 kilovolts of stub protection open entry loops, as shown in Figure 2.Stub protection investment forces hard pressing plate and outside
Road is opened into and taken back to the normally closed auxiliary contact composition of main transformer high-side lead disconnecting switch, and normal operation LP1 function hard pressing plate is set disconnected
Open position.
Outside is opened into contact work using " adaptive " mode for following external knife switch secondary contact to throw surrender shield automatically
Make that reliability requirement is very high, there is greatly operation hidden danger in actual electric network operation using the discriminant approach of a single state contact
And risk, it needs just to be avoided that power networks risk using safety control measures.Mainly there are two aspects for operation risk at present:
Risk 1: when 220 kilovolts of system full modes are run, when main transformer also operates normally, any main transformer high-pressure side in operation
The normally closed auxiliary contact of disconnecting switch is opened by mistake into (wrong diagnosis containing wiring or travel switch are accidentally closed), then automatically engages stub protection,
The load current that 220 kilovolts of effluents of main transformer are crossed at this time is exactly the spill current (being equivalent to short-term troubles inside the sample space) of stub protection, when
When load current reaches stub protection spill current starting setting valve, then stub protection will malfunction, main in false tripping operation
Become 220 kilovolts of breakers.
Risk 2: when 220 kilovolts of system full modes are run, and a certain main transformer body overhauls, the main transformer high-pressure side in operation
The normally closed auxiliary contact wrong diagnosis of disconnecting switch is opened and (is opened containing wiring loosening or travel switch wrong diagnosis), then may cause two sets of short legs and protect
Shield all automatically exits from, and will cause and stops using as a servant between corresponding 220 kilovolts of two breakers of main transformer without quick main protection operation, the section
It breaks down, by isolation of being tripped by the opposite side substation delay number route protection of two inlet wires of the substation, the change will be caused
220 kilovolts of power station system decompression even causes substation's full cut-off.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art places, and main transformer high pressure in operation can be prevented by providing one kind
The normally closed auxiliary contact of side disconnecting switch and its secondary circuit mislead or wrong diagnosis opens and stub protection miscarrying is caused to move back, and meet simultaneously
Remote operation control requires, and a kind of internal bridge for increasing safety control circuit to stub protection isolation switch open entry loop is short
Pilot protection adaptively throws the control circuit moved back.
A kind of internal bridge stub protection adaptively throws the control circuit moved back, and includes isolation switch input control power supply
Circuit, isolation switch weight motor type relay take electric control loop and stub protection adaptively to throw and move back control loop, the isolation
Disconnecting link input control electric power loop is to increase DC power supply in 220 kilovolts of stub protection screens to be spaced apart 1DK, and power supply is spaced apart input
It is spaced apart input power with stub protection power supply in screen and connects, has also installed 1JJ and 2JJ power supply monitoring relay, power supply prison
The power loss signal for surveying relay send monitoring system to monitor, 1JJ and 2JJ power supply monitoring relay for control loop ZJ and
The monitoring of TCJ relay working power；
It includes ZJ relay that the isolation switch weight motor type relay, which takes electric control loop, and ZJ relay is that electricity keeps dibit
Relay is set, relay is there are two coil, and one is actuation coil ZJ-I, and one is involution coil ZJ-II, and electricity keeps two-position
Relay only works in a state, monitors PT protective winding secondary voltage 1YJJ1(AB phase) and 1YJJ2(BC phase) relay
1YJJ1,1YJJ2 normally closed contact and monitoring PT measure winding secondary voltage 2YJJ1(AB phase) and 2YJJ2(BC phase) relay
2YJJ1,2YJJ2 normally closed contact concatenate starting ZJ relay and take electrical circuit, monitor PT protective winding secondary voltage 1YJJ1(AB
Phase) and 1YJJ2(BC phase) relay 1YJJ1,1YJJ2 normal opened contact and monitoring PT measure winding secondary voltage 2YJJ1(AB
Phase) and 2YJJ2(BC phase) relay 2YJJ1,2YJJ2 normal opened contact and connect starting ZJ relay power-off circuit, in direct current
When power supply works normally, which is controlled by two coil outer input contacts, when short leg corresponds to breaker
When stopping that corresponding segment bus is without pressure when labour, PT protective winding secondary voltage 1YJJ1(AB phase is monitored) and 1YJJ2(BC phase) relay is equal
Low pressure movement, 1YJJ1,1YJJ2 normally closed contact are connected, and 1YJJ1,1YJJ2 normal opened contact disconnect, and monitor the secondary electricity of PT measure winding
Press 2YJJ1(AB phase) and 2YJJ2(BC phase) the equal low-voltage of relay, the connection of 2YJJ1,2YJJ2 normally closed contact, 2YJJ1,
2YJJ2 normal opened contact disconnects, and drives ZJ actuating of relay coil motion, ZJ normal opened contact closure at this time, and ZJ normally closed contact disconnects,
It has connected isolation switch magnetic and has kept two-position weight motor type relay TCJ work negative supply, while having been sent in the movement of ZJ power on signal public
Measure and control device, under the working condition when distant splice grafting point has disconnected, and distant tapping point is not closed, relay remains at movement
State, when short leg corresponds to breaker closing, corresponding segment bus is charged, 1YJJ1,1YJJ2,2YJJ1 and 2YJJ2 relay
There is pressure to return, 1YJJ1,1YJJ2,2YJJ1,2YJJ2 normal opened contact are connected, and 1YJJ1,1YJJ2,2YJJ1,2YJJ2 are normally closed to be connect
Point disconnects, and drives ZJ relay involution coil motion, and ZJ normal opened contact disconnects, and the conducting of ZJ normally closed contact is disconnected relay TCJ
Work negative supply, while sending public measure and control device in the movement of ZJ power-off signal, when distant tapping point has disconnected under the working condition, and
When distant splice grafting point is not closed, relay remains at involution state, when emerged in operation DC supply interruption, relay two
A equal power loss involution of coil is disconnected relay TCJ work negative supply
The stub protection is adaptively thrown and moves back control loop: setting including main transformer high-pressure side isolation switch Ge unit normal
Auxiliary contact is closed, Ge switch mechanism case is also added to the normally opened auxiliary contact input in protection room, magnetic is respectively started and keeps two-position
Weight motor type relay TCJ and unit set weight motor type relay 1YQJ, 2YQJ, and relay TCJ is used to control external input auxiliary contact, after
Electric appliance TCJ contact is used to open as stub protection into criterion；Relay 1YQJ, 2YQJ to isolation switch input contact state and
Secondary circuit carries out real-time monitoring, and magnetic keeps two-position weight motor type relay TCJ there are two coil, and one is actuation coil TCJ-I,
One is involution coil TCJ-II, and magnetic keeps two-position relay only to work in a state, and former work is kept under power blackout situation
It is constant to make state, when DC power supply works normally, magnetic keeps two-position relay working condition to be inputted by two coil outers
Contact control drives TCJ when the normally opened auxiliary contact closure of main transformer high-pressure side isolation switch Ge, the disconnection of normally closed auxiliary contact at this time
Actuating of relay coil motion, TCJ normally closed contact disconnect, and stub protection is not put into, and signal does not send monitoring system, works as main transformer
Isolation switch Ge normally opened auxiliary contact in high-pressure side disconnects, normally closed auxiliary contact is closed, and drives TCJ relay involution coil dynamic at this time
Make, TCJ normally closed contact closure, stub protection investment, TCJ keeps signal to be sent to monitoring system monitoring.Relay 1YQJ,
2YQJ respectively carries out the normally opened auxiliary contact of main transformer high-pressure side isolation switch and normally closed auxiliary contact input state and secondary circuit
Real-time monitoring, when the normally opened auxiliary contact of isolation switch Ge is closed, 1YQJ movement, 1YQJ is returned when the normally opened auxiliary contact of Ge disconnects；
When isolation switch Ge normally closed auxiliary contact closure, 2YQJ movement, 2YQJ is returned when the normally closed auxiliary contact of Ge disconnects, two move again after
Moving again for electric appliance send monitoring system to monitor on signal.
In summary, the present invention following advantage compared with prior art:
The present invention is moved again by accessing main transformer high-pressure side disconnecting switch two-position in stub protection On-off signal circuit
The contact of magnetic latching relay, dynamic magnetic latching relay is normally opened by external isolation switch again, normally closed auxiliary contact is direct for two-position
Driving, this measure can prevent that the single normally closed auxiliary contact of the prior art and circuit from misleading or cause stub protection is convinced in wrong diagnosis by patient analysis
Miscarrying is moved back.On the basis of using two-position weight motor type relay, isolation switch is normally opened in operational process in order to prevent, normally closed auxiliary
There is working condition mistake simultaneously and protection miscarrying is caused to be moved back in contact, and devises control weight motor type relay working power herein
Take electrical circuit, take electrical circuit according to stub protection to correspond to the voltage condition of bus section, busbar section determine to take electric two-position electricity keep after
Electrical work state, only can carry out stub protection under bus passive state throwing and move back, and bus electrification is reliable when operation disconnects
The working power of weight motor type relay, avoiding in operation maloperation or disconnecting link state, accidentally overturning may cause protection miscarrying and move back, safety
Reliable realize moves back operation to the throwing of stub protection, while meeting remote operation self adaptive control requirement, when protection dual configuration is matched
When setting, control circuit is also double set configurations, herein only by taking wherein a set of control circuit as an example.
Detailed description of the invention
Fig. 1 is that 220 kv substation, 220 kilovolts of systems of the prior art are bridge main electrical scheme in expanding.
Fig. 2 is that electric operation control circuit figure is moved back in 220 kilovolts of short legs throwing of the prior art.
Fig. 3 is that electric operation control circuit figure is moved back in short leg throwing of the invention.
Specific embodiment
The present invention is described in more detail below with reference to embodiment.
Embodiment 1
A kind of internal bridge stub protection adaptively throws the control circuit moved back, and includes isolation switch input control power supply
Circuit, isolation switch weight motor type relay take electric control loop and stub protection adaptively to throw and move back control loop.
(1) isolation switch input control electric power loop: increase DC power supply in 220 kilovolts of stub protection screens and be spaced apart
1DK, power supply are spaced apart input and are spaced apart input power with stub protection power supply in screen and connect, which is mainly that isolation switch is defeated
Entry loop provides control power supply.Simultaneously in order to realize that control loop ZJ and TCJ relay working power monitors, install respectively
1JJ and 2JJ power supply monitoring relay, power loss signal send monitoring system to monitor.
(2) isolation switch weight motor type relay takes electric control loop: mechanism case extremely protects the disconnecting link of room in running in order to prevent
Normally opened, normally closed auxiliary contact misleads cause simultaneously or wrong diagnosis is opened, and increases the control loop that isolation switch weight motor type relay takes electricity.ZJ
Relay keeps weight motor type relay to take electricity for controlling isolation switch magnetic, which is that electricity keeps two-position relay, relay
Device is there are two coil, and one is actuation coil ZJ-I, and one is involution coil ZJ-II, and electricity keeps two-position relay only to work
In a state, when DC power supply works normally, which is controlled by two coil outer input contacts, when
Short leg correspond to breaker stop labour when corresponding segment bus without pressure when, monitor PT protective winding secondary voltage 1YJJ1(AB phase) and
1YJJ2(BC phase) the equal low pressure movement of relay, the connection of 1YJJ1,1YJJ2 normally closed contact, the disconnection of 1YJJ1,1YJJ2 normal opened contact,
Monitor PT measure winding secondary voltage 2YJJ1(AB phase) and 2YJJ2(BC phase) the equal low-voltage of relay, 2YJJ1,2YJJ2 are normal
Contact is closed, 2YJJ1,2YJJ2 normal opened contact disconnect, and drive ZJ actuating of relay coil motion at this time, and ZJ normal opened contact closes
It closes, ZJ normally closed contact disconnects, and has connected isolation switch magnetic and has kept two-position weight motor type relay TCJ work negative supply, while on ZJ
Public measure and control device is sent in electric signal movement, under the working condition when distant splice grafting point has disconnected, and distant tapping point is not closed, after
Electric appliance remains at action state.When short leg corresponds to breaker closing, corresponding segment bus is charged, 1YJJ1,1YJJ2,
2YJJ1 and 2YJJ2 relay has pressure to return, and 1YJJ1,1YJJ2,2YJJ1,2YJJ2 normal opened contact are connected, 1YJJ1,1YJJ2,
2YJJ1,2YJJ2 normally closed contact disconnect, and drive ZJ relay involution coil motion at this time, and ZJ normal opened contact disconnects, and ZJ is normally closed to be connect
Point conducting is disconnected relay TCJ work negative supply, while sending public measure and control device in the movement of ZJ power-off signal, the work shape
Under state when distant tapping point has disconnected, and distant splice grafting point is not closed, relay remains at involution state.Work as emerged in operation
When DC supply interruption, the equal power loss involution of two coils of relay is disconnected relay TCJ work negative supply.
When to ensure that stub protection corresponds to bus section, busbar section without pressure, in the case of corresponding each equal decompression of winding secondary voltage of bus PT
Could execute ZJ relay take it is electrically operated, thus using protection, measure winding control relay all normally closed contacts concatenation open
Dynamic ZJ relay takes electrical circuit.When on the other hand to ensure that stub protection corresponds to bus section, busbar section electrification, to prevent corresponding segment bus
When PT relay control relay occurs abnormal, remain to reliably execute ZJ relay power operation, thus using protect, metering around
All normal opened contacts of group control relay simultaneously connect starting ZJ relay power-off circuit.
(3) stub protection is adaptively thrown and moves back control loop: stub protection original open entry loop is using main transformer high pressure
The normally closed auxiliary contact that side isolation switch Ge unit is set, this programme are that Ge switch mechanism case is increased on the basis of original to protection
Room normally opened auxiliary contact input, be respectively started magnetic keep two-position weight motor type relay TCJ and unit set weight motor type relay 1YQJ,
2YQJ, wherein relay TCJ is for controlling external input auxiliary contact, relay tip be used to open as stub protection into
Criterion；Relay 1YQJ, 2YQJ input contact state to isolation switch and secondary circuit carries out real-time monitoring.Magnetic keeps two-position
Weight motor type relay TCJ is there are two coil, and one is actuation coil TCJ-I, and one is involution coil TCJ-II, and magnetic keeps two-position
Relay only works in a state, and keeps former working condition constant under power blackout situation, this be kept with electricity two-position after
The maximum difference of electric appliance.When DC power supply works normally, which inputs contact control by two coil outers
System drives TCJ relay when the normally opened auxiliary contact closure of main transformer high-pressure side isolation switch Ge, the disconnection of normally closed auxiliary contact at this time
Actuation coil movement, TCJ normally closed contact disconnect, and stub protection is not put into, and signal does not send monitoring system.When main transformer high-pressure side
The normally opened auxiliary contact of isolation switch Ge disconnects, normally closed auxiliary contact is closed, and drives TCJ relay involution coil motion, TCJ at this time
Normally closed contact closure, stub protection investment, TCJ keep signal to be sent to monitoring system monitoring.Relay 1YQJ, 2YQJ difference
Real-time monitoring is carried out to the normally opened auxiliary contact of main transformer high-pressure side isolation switch and normally closed auxiliary contact input state and secondary circuit,
When the normally opened auxiliary contact of isolation switch Ge is closed, 1YQJ movement, 1YQJ is returned when the normally opened auxiliary contact of Ge disconnects；Isolation switch Ge
When normally closed auxiliary contact is closed, 2YQJ movement, 2YQJ is returned when the normally closed auxiliary contact of Ge disconnects, and two weight motor type relays move again
Monitoring system is sent to monitor on signal, it can be found that the abnormality of its auxiliary contact and secondary circuit when normal operation.
When regulation personnel or operation maintenance personnel, which receive, needs altering system method of operation operational order, Awaiting Overhaul is disconnected
Or each side breaker of investment main transformer is waited, stub protection drives the ZJ actuating of relay after corresponding to bus section, busbar section decompression, passes through monitoring
" TCJ is powered on " signal of system confirms ZJ relay action message, connects TCJ negative supply, when by changing system operation mode
It completes after disconnecting or closing Ge switch operation, it is whether correct by 1YQJ and 2YQJ real-time monitoring Ge auxiliary contact state, at this time
The appearance normally opened auxiliary contact of Ge and normal auxiliary contact disconnect, closure or relay status and reality be not corresponding, can pass through prison
" the non-holding of 1YQJ, 2YQJ " signal acknowledgement state of control system, if the incorrect accidentally driving TCJ relay of state, because at this time
Corresponding breaker is also not carried out closing operation, even if to move back state incorrect for stub protection throwing, will not cause false protection
Make, thus should notify that service personnel carries out inspection processing to abnormal subsidiary loop immediately, handles normal rear by monitoring system " Ge
Normally closed heavy dynamic (magnetic holding) " signal confirms TCJ relay working condition, while checking that the protection of short-term line is opened and confirming protection into displacement
Throwing moves back whether meet actual operating, moves back correctly to judge whether protection throws, after confirmation correctly.When short leg is closed in execution
Bus section, busbar section electrification is corresponded to when protecting corresponding breaker operator, is driven the involution of ZJ relay, is passed through " the TCJ power-off " of monitoring system
Signal confirms the reliable involution of ZJ relay, and returned by " the non-holding of 1YQJ, 2YQJ " signal of monitoring system and 2JJ after
Electric appliance " alarm of direct current power loss " signal confirmation TCJ relay negative supply reliably disconnects, and TCJ relay no longer receives external at this time
Ge auxiliary contact accidentally will not cause short leg in operation to protect by driving TCJ relay even if auxiliary contact status error in operation
Shield miscarrying is moved back, and is safely and effectively guaranteed that stub protection is reliably thrown and is moved back, and not will cause protection in operation and is refused malfunction.Pass through above-mentioned behaviour
Operation is moved back in the adaptive throwing made and securely and reliably complete a stub protection, if system operation mode becomes again
Change, short leg inlet wire need to be thrown next time and move back operation, operating procedure is same as above.
When a main website distant place executes programming operations, by switch, disconnecting link displacement information and operation in each operating procedure
It corresponds to signal intensity confirmation in the process to be included in sequence operation ticket, operating process automatically tracks corresponding letter according to equipment state variation
Number, information change to judge whether to execute next operating procedure be not necessarily to manpower intervention, to fast and safely be reliably completed primary
The interior bridge method of operation changes and the operation task of stub protection automatic switching.
The description of Fig. 3 circuit connecting relation:
(1) isolation switch input control electric power loop: increase DC power supply in 220 kilovolts of stub protection screens and be spaced apart
1DK is spaced apart power supply and is shielding interior and connecing with stub protection power supply, which is mainly that isolation switch input and control loop provide
Power supply.Power supply monitoring relay 1JJ, which is connected to, takes electric control relay ZJ electric power loop, and power supply monitoring relay 2JJ is connected to
Guard relay TCJ electric power loop is moved in position again, and relay coil is just terminated at positive power source terminal, and coil negative terminal is connected to negative supply
End monitors ZJ TCJ relay working power state respectively, and when there is the disappearance of corresponding segment power supply, 1JJ, 2JJ relay power are lost
Electric contact sends monitoring system and reminds prison disk personnel.
(2) isolation switch weight motor type relay takes electric control loop:
The disconnecting link of mechanism case to protection room is normally opened in operation in order to prevent, normally closed auxiliary contact misleads cause or wrong diagnosis simultaneously
It opens, increases the control loop that isolation switch weight motor type relay takes electricity.Take that the starting-up later time of electric control loop accesses is to be used for
Monitoring stub protection corresponds to the concatenation normally closed contact of bus section, busbar section PT protection and metered voltage winding voltage control relay, monitoring
Relay 1YJJ1,1YJJ2,2YJJ1,2YJJ2 are connected to protection and metered voltage winding AB phase and BC phase respectively, and bus is without pressure
When, all winding secondary voltages are all closed without output, four relay normally closed contacts, starting take electric control two-position electricity keep after
The actuation coil of electric appliance ZJ, the ZJ actuating of relay, the negative supply of ZJ normal opened contact on-position weight motor type relay TCJ.Bus has
When pressure, protection, metered voltage winding have output voltage, and any relay normally open contact closure, then starting takes electric control dibit
The involution coil of relay ZJ is set, ZJ relay returns, and ZJ normal opened contact disconnects the negative supply of TCJ relay.ZJ relay is normal
It opens contact and sends monitoring system prompting prison disk personnel.When in operation if there is direct current power loss, electric guard relay ZJ is returned, ZJ
Normal opened contact disconnects TCJ relay negative supply, can not carry out stub protection throwing at this time and move back operation, to the normal rear of abnormality processing
It can continue to operate.Stub protection, which corresponds to bus section, busbar section, to be had pressure or without pressure, primary equipment actual motion state is characterized, only in correspondence
When breaker stops labour, operation is moved back in the throwing that just can be carried out stub protection when bus is without pressure, when bus has a pressure at this time at primary system
In operating status, operation is moved back in the throwing that can not carry out stub protection, and prevents the miscarrying of stub protection in operational process from moving back
Important measures.
(1) stub protection is adaptively thrown and moves back control loop:
For prevent stub protection open entry loop access main transformer high-pressure side isolation switch Ge unit set normally closed auxiliary contact or
Misleading is moved back in secondary circuit operation or operation or wrong diagnosis is opened, and stub protection miscarrying is caused to move back.This programme is using access isolation
The normally closed and normally open auxiliary contact in the two-position disconnecting link Ge works as isolation switch after taking electric control relay ZJ movement to connect negative supply
When Ge is disconnected, normally opened auxiliary contact is disconnected, and normally closed auxiliary contact is connected while starting position moves the dynamic of magnetic latching relay TCJ again
To make coil and unit sets weight motor type relay 1YQJ, TCJ and 1YQJ relay acts, and two relay normally open contacts are both turned on,
The secondary contact of TCJ mono- is opened into stub protection, i.e. investment stub protection, and protection, which is opened, to be supervised into displacement information by soft message up sending
Control system, another secondary contact of TCJ and 1YQJ contact are also sent to monitoring system and remind prison disk personnel.When isolation switch Ge closes a floodgate
When, normally closed auxiliary contact disconnects, and normally opened auxiliary contact is connected while starting the involution coil that magnetic latching relay TCJ is moved in position again
Weight motor type relay 2YQJ, the return of TCJ relay, the 2YQJ actuating of relay are set with unit, TCJ normal opened contact is disconnected, that is, is disconnected to
Stub protection open into, exit stub protection, corresponding protection is opened into displacement information through soft message up sending monitoring system,
2YQJ normal opened contact is sent to monitoring system and reminds prison disk personnel.During short leg throwing is moved back (i.e. TCJ negative supply obtains the electric stage),
When auxiliary contact location status normally opened if there is isolation switch Ge, normally closed and inconsistent primary equipment virtual condition, pass through TCJ
With the verifiable corresponding equipment state of 1YQJ, 2YQJ, can be carried out after service personnel should be notified to eliminate live exception in time at this time
It operates in next step.During short leg puts into or is out of service (i.e. TCJ negative supply power loss stage), if there is isolation switch
Ge is normally opened, normally closed auxiliary contact location status and when inconsistent primary equipment virtual condition, is verified pair by 1YQJ, 2YQJ at this time
Equipment state is answered, service personnel is reinformed and is disposed to abnormal, stub protection throwing is will not influence under this state and moves back.It ran
When occurring DC power supply power loss in journey, it will not influence TCJ magnetic latching relay working condition, not will cause the mistake of stub protection
Throwing is moved back.
The not described part of the present embodiment is same as the prior art.
Claims (1)
1. a kind of internal bridge stub protection adaptively throws the control circuit moved back, it is characterised in that: include that isolation switch is defeated
Enter to control electric power loop, isolation switch weight motor type relay takes electric control loop and stub protection adaptively to throw to move back control loop,
The isolation switch input control electric power loop is to increase DC power supply in 220 kilovolts of stub protection screens to be spaced apart 1DK, electricity
Source is spaced apart input and is spaced apart input power with stub protection power supply in screen and connects, and has also installed 1JJ and 2JJ power supply monitoring relay
The power loss signal of device, power supply monitoring relay send monitoring system to monitor, 1JJ and 2JJ power supply monitoring relay is for controlling
The monitoring of circuit ZJ and TCJ relay working power；
It includes ZJ relay that the described isolation switch weight motor type relay, which takes electric control loop, ZJ relay be electricity keep two-position after
Electric appliance, relay is there are two coil, and one is actuation coil ZJ-I, and one is involution coil ZJ-II, and electricity keeps two-position relay
Device only works in a state, monitor PT protective winding secondary voltage 1YJJ1AB phase and 1YJJ2BC phase relay 1YJJ1,
2YJJ1,2YJJ2 of 1YJJ2 normally closed contact and monitoring PT measure winding secondary voltage 2YJJ1AB phase and 2YJJ2BC phase relay
Normally closed contact concatenates starting ZJ relay and takes electrical circuit, monitors PT protective winding secondary voltage 1YJJ1AB phase and 1YJJ2BC phase
1YJJ1,1YJJ2 normal opened contact of relay and monitoring PT measure winding secondary voltage 2YJJ1AB phase and 2YJJ2BC phase relay
2YJJ1,2YJJ2 normal opened contact and connect starting ZJ relay power-off circuit, DC power supply work normally when, the relay
Working condition by the input contacts control of two coil outers, when short leg correspond to corresponding segment bus is without pressing when breaker stops labour when,
PT protective winding secondary voltage 1YJJ1AB phase and the equal low pressure movement of 1YJJ2BC phase relay are monitored, 1YJJ1,1YJJ2 are normally closed to be connect
Point is connected, and 1YJJ1,1YJJ2 normal opened contact disconnect, and monitors PT measure winding secondary voltage 2YJJ1AB phase and 2YJJ2BC phase relay
The equal low-voltage of device, 2YJJ1,2YJJ2 normally closed contact are connected, and 2YJJ1,2YJJ2 normal opened contact disconnect, and drive ZJ relay at this time
Actuation coil movement, ZJ normal opened contact closure, ZJ normally closed contact disconnect, and have connected isolation switch magnetic and two-position is kept to move relay again
Device TCJ work negative supply, while public measure and control device is sent in the movement of ZJ power on signal, when distant splice grafting point has broken under the working condition
It opens, and when distant tapping point is not closed, relay remains at action state, the corresponding segment when short leg corresponds to breaker closing
When bus charges, 1YJJ1,1YJJ2,2YJJ1 and 2YJJ2 relay have pressure to return, and 1YJJ1,1YJJ2,2YJJ1,2YJJ2 are normal
Contact is opened, 1YJJ1,1YJJ2,2YJJ1,2YJJ2 normally closed contact disconnect, and drive ZJ relay involution coil motion, and ZJ is normal
Contact disconnection is opened, the conducting of ZJ normally closed contact is disconnected relay TCJ work negative supply, while sending public affairs in the movement of ZJ power-off signal
With measure and control device, under the working condition when distant tapping point has disconnected, and distant splice grafting point is not closed, relay remains at multiple
Return state, when emerged in operation DC supply interruption, the equal power loss involution of two coils of relay is disconnected relay TCJ work
Make negative supply, the stub protection is adaptively thrown and moves back control loop: being set including main transformer high-pressure side isolation switch Ge unit
Normally closed auxiliary contact also adds Ge switch mechanism case to the normally opened auxiliary contact input in protection room, magnetic is respectively started and keeps dibit
It setting weight motor type relay TCJ and unit sets weight motor type relay 1YQJ, 2YQJ, relay TCJ is used to control external input auxiliary contact,
Relay TCJ contact is used to open as stub protection into criterion；Relay 1YQJ, 2YQJ input contact state to isolation switch
And secondary circuit carries out real-time monitoring, magnetic keeps two-position weight motor type relay TCJ there are two coil, and one is actuation coil TCJ-
I, one is involution coil TCJ-II, and magnetic keeps two-position relay only to work in a state, keeps former under power blackout situation
Working condition is constant, and when DC power supply works normally, magnetic keeps two-position relay working condition defeated by two coil outers
Enter contact control, when the normally opened auxiliary contact closure of main transformer high-pressure side isolation switch Ge, the disconnection of normally closed auxiliary contact, drives at this time
TCJ actuating of relay coil motion, TCJ normally closed contact disconnect, and stub protection is not put into, and signal does not send monitoring system, when
Isolation switch Ge normally opened auxiliary contact in main transformer high-pressure side disconnects, normally closed auxiliary contact is closed, and drives TCJ relay involution line at this time
Circle movement, TCJ normally closed contact closure, stub protection investment, TCJ keep signal to be sent to monitoring system monitoring, relay
1YQJ, 2YQJ are respectively to the normally opened auxiliary contact of main transformer high-pressure side isolation switch and normally closed auxiliary contact input state and secondary circuit
Real-time monitoring is carried out, when the normally opened auxiliary contact of isolation switch Ge is closed, 1YQJ movement, 1YQJ is returned when the normally opened auxiliary contact of Ge disconnects
It returns；When the normally closed auxiliary contact of isolation switch Ge is closed, 2YQJ movement, 2YQJ is returned when the normally closed auxiliary contact of Ge disconnects, two weights
Moving again for motor type relay send monitoring system to monitor on signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821576567.3U CN209358241U (en) | 2018-09-27 | 2018-09-27 | A kind of internal bridge stub protection adaptively throws the control circuit moved back |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821576567.3U CN209358241U (en) | 2018-09-27 | 2018-09-27 | A kind of internal bridge stub protection adaptively throws the control circuit moved back |
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| Publication Number | Publication Date |
|---|---|
| CN209358241U true CN209358241U (en) | 2019-09-06 |
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|---|---|---|---|
| CN201821576567.3U Withdrawn - After Issue CN209358241U (en) | 2018-09-27 | 2018-09-27 | A kind of internal bridge stub protection adaptively throws the control circuit moved back |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193583A (en) * | 2018-09-27 | 2019-01-11 | 国网福建省电力有限公司泉州供电公司 | A kind of internal bridge stub protection adaptively throws the safety control moved back |
-
2018
- 2018-09-27 CN CN201821576567.3U patent/CN209358241U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193583A (en) * | 2018-09-27 | 2019-01-11 | 国网福建省电力有限公司泉州供电公司 | A kind of internal bridge stub protection adaptively throws the safety control moved back |
| CN109193583B (en) * | 2018-09-27 | 2024-03-26 | 国网福建省电力有限公司泉州供电公司 | Control circuit for self-adaptive switching of inner bridge connection short lead protection |
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