CN109509658B - A kind of relay protection DC control circuit and its full working scope monitoring and fault early warning method - Google Patents
A kind of relay protection DC control circuit and its full working scope monitoring and fault early warning method Download PDFInfo
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- CN109509658B CN109509658B CN201811642864.8A CN201811642864A CN109509658B CN 109509658 B CN109509658 B CN 109509658B CN 201811642864 A CN201811642864 A CN 201811642864A CN 109509658 B CN109509658 B CN 109509658B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000009191 jumping Effects 0.000 claims abstract description 28
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 abstract description 7
- 230000006872 improvement Effects 0.000 abstract description 5
- 230000007257 malfunction Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 210000004209 hair Anatomy 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention discloses a kind of relay protection DC control circuit and its full working scope monitoring and fault early warning method; on the basis of original relay protection DC control circuit; addition and original coincidence and the relay for jumping position relay same model; and fully and rationally use relay auxiliary contact; realize relay protection DC control circuit full working scope running state monitoring; Component selection is simple, can monitor the problems such as trip(ping) circuit and closing circuit are with the presence or absence of poor contact, broken string under tripping or "on" position.Meanwhile monitoring the working condition of trip(ping) circuit and closing circuit in real time using the time relay, DC control circuit protection and forewarning function are played, loop element is avoided to flow through action current for a long time and burn.Above-mentioned improvement, can effectively avoid because relay protection DC control circuit hardware fault and caused by relay fail or malfunction, ensure that the safe and reliable operation of electric system.
Description
Technical field
The invention belongs to technical field of relay protection, in particular to a kind of relay protection DC control circuit and its full working scope
Monitoring and fault early warning method.
Background technique
Catastrophic cascading failure occurs for electric system, has closely with incorrect operation caused by relay protection hidden failure
Relationship.With protection philosophy research and develop and configure constantly improve, as software setting and definite value mistake caused by protect malfunction
The case where gradually decrease, and one of the main reason for relay protection hardware deficiency is known as causing relay protection hidden failure to occur.
Microcomputer Protection relies on self-test it can be found that protecting itself existing most of hardware deficiency, but the DC operation outside protective device
Circuit does not have self-checking function, and the protection incorrect operation as caused by DC control circuit defect still accounts for quite high ratio.Often
The traffic lights circuit of rule is directly monitored by or the method for position relay normally-closed contact concatenation signal circuit indirect monitor, in breaker
Closing circuit can not be monitored after combined floodgate, trip(ping) circuit can not be monitored after tripping, i.e. two methods are not full working scope monitoring.Separately
Outside, when breaker tripping or bad auxiliary contacts of circuit breaker tap, breaker tripping and closing coil or the elements such as relay can because it is long when
Between flow through action current and burn, operation circuit lacks corresponding early warning safeguard measure, could perceive after loop element is burnt
Circuit breaking situation.Therefore, the design of full working scope in-service monitoring need to be carried out to relay protection DC control circuit, and to operate back
Road has the function of fault pre-alarming, to ensure the safe and stable operation of electric system.
Refering to Figure 1, when circuit breaker trip, normally-closed contact QF1 closure jumps position relay TWJ, normally closed at this time
Contact QF1, closing coil HQ constitute closed circuit, can be realized circuit breaker trip using the auxiliary contact for jumping position relay TWJ
State judgement, while can judge and jump the concatenated cable of relay TWJ, breaker normally-closed contact QF1 and a closing coil HQ
Whether equal closing circuits subelement damages.
It please refers to shown in Fig. 2, when breaker closing, normally opened contact QF2 closure, coincidence relay HWJ, normally opened at this time
Contact QF2, breaking coil TQ constitute closed circuit, can be realized circuit breaker trip using the auxiliary contact of coincidence relay HWJ
State judgement, while can judge and the concatenated cable of coincidence relay HWJ, breaker normally-closed contact QF2 and breaking coil TQ
Whether equal trip(ping) circuits subelement damages.
The shortcomings that prior art:
1, after circuit breaker trip, can not monitor whether the cable of trip(ping) circuit in DC control circuit breaks, breaking coil
Whether damage.
2, after breaker closing, can not monitor whether the cable of closing circuit in DC control circuit breaks, closing coil
Whether damage.
If 3, auxiliary contacts of circuit breaker QF1 or QF2 tripping, in the self-holding function of latch-in relay TBJ and HBJ
Under, long-time is connected DC control circuit, and the elements such as tripping or closing coil, latch-in relay in circuit may be because of length
Time flows through action current and burns.
Summary of the invention
The purpose of the present invention is to provide a kind of relay protection DC control circuit and its full working scope monitoring and fault pre-alarmings
Method, to solve the above technical problems.The present invention realizes the monitoring of relay protection DC control circuit full working scope, that is, trips or close a floodgate
Situations such as trip(ping) circuit and closing circuit are with the presence or absence of broken string can be monitored simultaneously afterwards, to send out in time to operation maintenance personnel
Alarm signal and determining fault loop out grasp DC control circuit operating status convenient for operation maintenance personnel, and dynamic to protection
Make behavior and carries out Correct Analysis.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of relay protection DC control circuit, including closing circuit and trip(ping) circuit；
Closing circuit includes combined floodgate guard relay normally opened contact HBJ, automatic closing contact ZHJ, closing by hand contact
SHJ, combined floodgate guard relay HBJ, breaker normally closed auxiliary contact QF1, closing coil HQ and jump position relay TWJ；It closes a floodgate and protects
After holding relay normally open contact HBJ, automatic closing contact ZHJ, closing by hand contact SHJ parallel connection, one end connection DC bus+
KM, other end series connection one end combined floodgate guard relay HBJ；Position latch-in relay is jumped in branch series connection where jumping position relay TWJ
TBJ normally opened contact, while at branch both ends parallel connection one by coincidence relay HHWJ after closing a floodgate and coincidence latch-in relay
The branch that HBJ normally opened contact is composed in series；
Trip(ping) circuit includes jumping position latch-in relay TBJ normally opened contact, automatic closing contact ZTJ, closing by hand contact
STJ, position latch-in relay TBJ, the normally opened auxiliary contact QF3 of breaker, breaking coil TQ are jumped and jumps coincidence relay HWJ；It jumps
After position latch-in relay TBJ normally opened contact, automatic closing contact ZTJ, closing by hand contact STJ are in parallel, one end connects direct current
The one end position latch-in relay TBJ is jumped in bus+KM, other end series connection；Branch series connection coincidence self-sustaining where coincidence relay HWJ
Relay HBJ normally opened contact, while at branch both ends parallel connection one by jumping relay TTWJ in position after tripping and jumping position self-sustaining
The branch that relay TBJ normally opened contact is composed in series.
Further, the both ends coincidence latch-in relay HBJ and joint bit time relay HTJ, and with jump position self-sustaining
The delay of relay TBJ normally-closed contact and coincidence time relay HTJ disconnect auxiliary contact series connection.
Further, coincidence time relay HTJ delay disconnect auxiliary contact, breaker normally closed auxiliary contact QF1 and
Closing coil HQ series connection, closing coil HQ connection DC bus-KM.
Further, normally opened auxiliary contact QF2 in parallel on breaker normally closed auxiliary contact QF1.
Further, branch series connection coincidence latch-in relay HBJ normally opened contact where coincidence relay HWJ, while
One in parallel of the branch both ends are composed in series by jumping relay TTWJ in position after tripping and jumping position latch-in relay TBJ normally opened contact
Branch.
Further, jump the both ends position latch-in relay TBJ and shunt tripping position time relay TTJ, and with jump the position time after
The delay of electric appliance TTJ disconnects auxiliary contact series connection.
Further, normally closed auxiliary contact QF4 in parallel on the normally opened auxiliary contact QF3 of breaker；Jump the position time relay
TTJ, breaker normally opened auxiliary contact QF3 and breaking coil TQ are sequentially connected in series and connect DC bus-KM.
A kind of full working scope monitoring of relay protection DC control circuit and fault early warning method, comprising:
When breaker receives trip command and is in tripped condition, breaker normally-closed contact QF1 and QF4 closure jump position
Latch-in relay TBJ normally opened contact closure, under normal circumstances, it position relay TWJ that DC bus ± KM, which is jumped, the jump that has been closed
Position latch-in relay TBJ normally opened contact, cable, breaker normally-closed contact QF1 and closing coil HQ constitute closed circuit and lead
It is logical；If cable failure disconnection, breaker normally-closed contact QF1 tripping, closing coil HQ damage in any one or more situation hair
Raw, jumping position relay TWJ can not act, and show that closing circuit exists and disconnect failure；
In addition, under normal circumstances, DC bus ± KM jumps position relay TTWJ after tripping, has closed in trip(ping) circuit
It closes and jumps position latch-in relay TBJ normally opened contact, cable, breaker normally-closed contact QF4 and breaking coil TQ composition closed circuit
And it is connected；If cable failure disconnection, breaker normally-closed contact QF4 tripping, breaking coil TQ damage in any one happen,
Relay TTWJ in position is jumped after tripping to be acted, and shown that trip(ping) circuit exists and disconnected failure；
By jumping position relay TWJ and jumping the movement of position relay TTWJ, closing circuit and jump after circuit breaker trip are realized
The monitoring of the operating status in lock circuit.
A kind of full working scope monitoring of relay protection DC control circuit and fault early warning method, comprising:
When breaker receives reclosing command and is in "on" position, breaker normally opened contact QF2 and QF3 closure, coincidence
Latch-in relay HBJ normally opened contact closure, under normal circumstances, DC bus ± KM through coincidence relay HWJ, be closed coincidence
Latch-in relay HBJ normally opened contact, cable, breaker normally opened contact QF3 and breaking coil TQ constitute closed circuit and are connected；
If cable failure disconnection, breaker normally opened contact QF3 tripping, breaking coil TQ damage in any one or more happen,
Then coincidence relay HWJ can not be acted, and shown that trip(ping) circuit exists and disconnected failure；
In addition, in closing circuit, under normal circumstances, DC bus ± KM after closing a floodgate coincidence relay HHWJ, closed
It closes coincidence latch-in relay HBJ normally opened contact, cable, breaker normally opened contact QF2 and closing coil HQ and constitutes closed circuit
And it is connected；If cable failure disconnection, breaker normally opened contact QF2 tripping, closing coil HQ damage in any one or more feelings
Condition occurs, then coincidence relay HHWJ can not be acted after closing a floodgate, and shows that closing circuit exists and disconnects failure；
By the movement of coincidence relay HWJ and coincidence relay HHWJ, closing circuit and jump after breaker closing are realized
The monitoring of the operating status in lock circuit.
A kind of full working scope monitoring of relay protection DC control circuit and fault early warning method, comprising:
After breaker receives trip command, DC bus ± KM through jump position latch-in relay TBJ or jump the position time after
Electric appliance TTJ, the position time relay delay break contact, cable, close circuit breaker normally opened contact QF3 and breaking coil TQ structure are jumped
At closed circuit and be connected, jump position time relay TTJ obtain it is electric after start timing；If breaker normally opened contact QF3 tripping, passes through
After crossing setting time, by jumping position time relay TTJ delay disconnection auxiliary contact cutting trip(ping) circuit and issuing alarm signal；
After breaker receives reclosing command, DC bus ± KM through coincidence latch-in relay HBJ or coincidence time after
Electric appliance HTJ, coincidence time relay delay break contact, cable, breaker normally-closed contact QF1 and closing coil HQ constitute closure
Circuit is simultaneously connected, coincidence time relay HTJ obtain it is electric after start timing；If breaker normally-closed contact QF1 tripping, by adjusting
After time, it is delayed by coincidence time relay HTJ and disconnects auxiliary contact cutting closing circuit and issue alarm signal.
Compared with the existing technology, the invention has the following advantages:
For the present invention on the basis of original relay protection DC control circuit, addition is identical with position relay is jumped with original coincidence
The relay of model, and relay auxiliary contact is fully and rationally used, realize relay protection DC control circuit full working scope fortune
Row Stateful Inspection, Component selection is simple, and trip(ping) circuit and closing circuit can be monitored under tripping or "on" position with the presence or absence of connecing
Touch it is bad, broken string the problems such as.Meanwhile monitoring the working condition of trip(ping) circuit and closing circuit in real time using the time relay, it rises
To DC control circuit protection and forewarning function, loop element is avoided to flow through action current for a long time and burn.Above-mentioned improvement, all
Can effectively avoid because relay protection DC control circuit hardware fault and caused by relay fail or malfunction, ensure that electric power
The safe and reliable operation of system.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of existing closing circuit；
Fig. 2 is the structural schematic diagram of existing trip(ping) circuit；
Fig. 3 is the structural schematic diagram of closing circuit of the present invention；
Fig. 4 is the structural schematic diagram of trip(ping) circuit of the present invention.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.It should be noted that in the feelings not conflicted
Under condition, the features in the embodiments and the embodiments of the present application be can be combined with each other.
Following detailed description is exemplary explanation, it is intended to provide further be described in detail to the present invention.Unless another
It indicates, all technical terms of the present invention contain with the normally understood of the application one of ordinary skill in the art
Justice is identical.Term used in the present invention is merely to describe specific embodiment, and be not intended to limit according to the present invention
Illustrative embodiments.
The present invention provides a kind of relay protection DC control circuit, with prevent from causing because of DC control circuit relay fail or
Person's malfunction.
It includes closing circuit and trip(ping) circuit that the present invention, which provides a kind of relay protection DC control circuit,.
Please refer to shown in Fig. 3, closing circuit include combined floodgate guard relay normally opened contact HBJ, automatic closing contact ZHJ,
Closing by hand contact SHJ, combined floodgate guard relay HBJ, breaker normally closed auxiliary contact QF1, closing coil HQ and jump position after
Electric appliance TWJ.After combined floodgate guard relay normally opened contact HBJ, automatic closing contact ZHJ, closing by hand contact SHJ are in parallel, one end
Connect DC bus+KM, other end series connection one end combined floodgate guard relay HBJ.
The present invention is the improvement of existing closing circuit:
It improves firstly, for branch where existing jump position relay TWJ, i.e., is propped up where jumping position relay TWJ
Position latch-in relay TBJ normally opened contact is jumped in road series connection, while at branch both ends parallel connection one by coincidence relay after closing a floodgate
The branch that HHWJ and coincidence latch-in relay HBJ normally opened contact are composed in series.It jumps on position latch-in relay TBJ normally opened contact
And shunt tripping position relay TWJ normally opened contact.
Secondly, being improved to branch where coincidence latch-in relay HBJ, i.e., in coincidence latch-in relay HBJ two
Hold and joint bit time relay HTJ, and with jump position latch-in relay TBJ normally-closed contact and coincidence time relay HTJ
Delay disconnects auxiliary contact series connection.The delay of coincidence time relay HTJ disconnects auxiliary contact, breaker normally closed auxiliary contact
QF1 and closing coil HQ series connection, closing coil HQ connection DC bus-KM.
Finally, improving in mechanism case to breaker normally closed auxiliary contact QF1, that is, it is changed to the normally closed auxiliary touching of breaker
Point QF1 and normally opened auxiliary contact QF2 is in parallel.
It please refers to shown in Fig. 4, trip(ping) circuit includes jumping position latch-in relay TBJ normally opened contact, automatic closing contact
ZTJ, closing by hand contact STJ, position latch-in relay TBJ, the normally opened auxiliary contact QF3 of breaker, breaking coil TQ and jump are jumped
Coincidence relay HWJ.It is in parallel to jump position latch-in relay TBJ normally opened contact, automatic closing contact ZTJ, closing by hand contact STJ
Afterwards, one end connects DC bus+KM, and the one end position latch-in relay TBJ is jumped in other end series connection.
The present invention is the improvement of existing trip(ping) circuit:
It improves firstly, for branch where existing coincidence relay HWJ, i.e., is propped up where coincidence relay HWJ
Road series connection coincidence latch-in relay HBJ normally opened contact, while at branch both ends parallel connection one by jumping position relay after tripping
The branch that TTWJ and jump position latch-in relay TBJ normally opened contact are composed in series.Jump position latch-in relay TBJ normally opened contact two
Position relay TTWJ normally opened contact is jumped after holding shunt tripping；Coincidence latch-in relay HBJ normally opened contact both ends and joint bit after
Electric appliance HWJ normally opened contact.
Secondly, improving to branch where jumping position latch-in relay TBJ, that is, jumping position latch-in relay TBJ two
Simultaneously shunt tripping position time relay TTJ is held, and disconnects auxiliary contact with the delay for jumping position time relay TTJ and connects.
Finally, auxiliary contact QF3 normally opened to breaker is improved in mechanism case, that is, it is changed to the normally opened auxiliary touching of breaker
Point QF3 and normally closed auxiliary contact QF4 are in parallel.Jump position time relay TTJ, the normally opened auxiliary contact QF3 of breaker and breaking coil
TQ is sequentially connected in series and connects DC bus-KM.
Improved DC control circuit full working scope monitoring and fault early warning method are as follows:
When breaker receives trip command and is in tripped condition, breaker normally-closed contact QF1 and QF4 closure jump position
Latch-in relay TBJ normally opened contact closure, under normal circumstances, DC bus ± KM are jumped position relay TWJ, jump position self-sustaining
Relay TBJ normally opened contact (closure), cable, breaker normally-closed contact QF1 and closing coil HQ constitute closed circuit and lead
It is logical.If any one or more situation hairs such as cable failure disconnection, breaker normally-closed contact QF1 tripping, closing coil HQ breaking-ups
Raw, then jumping a relay TWJ can not act, and show that closing circuit exists and disconnect failure.In addition, in trip(ping) circuit, positive reason
Under condition, DC bus ± KM jumped after tripping position relay TTWJ, jump position latch-in relay TBJ normally opened contact (closure),
Cable, breaker normally-closed contact QF4 and breaking coil TQ constitute closed circuit and are connected.Likewise, if cable failure disconnects, is disconnected
Road device normally-closed contact QF4 tripping, breaking coil TQ damage etc. any one happen, then trip after jump position relay TTWJ without
Method movement shows that trip(ping) circuit exists and disconnects failure.Therefore, according to improved DC control circuit design scheme, breaker
Closing circuit and the operating status of trip(ping) circuit are effectively monitored after tripping.
When breaker receives reclosing command and is in "on" position, breaker normally opened contact QF2 and QF3 closure, coincidence
Latch-in relay HBJ normally opened contact closure, under normal circumstances, DC bus ± KM is through coincidence relay HWJ, coincidence self-sustaining
Relay HBJ normally opened contact (closure), cable, breaker normally opened contact QF3 and breaking coil TQ constitute closed circuit and lead
It is logical.If any one or more situation hairs such as cable failure disconnection, breaker normally opened contact QF3 tripping, breaking coil TQ breaking-ups
Raw, then coincidence relay HWJ can not be acted, and shown that trip(ping) circuit exists and disconnected failure.In addition, in closing circuit, positive reason
Under condition, DC bus ± KM after closing a floodgate coincidence relay HHWJ, coincidence latch-in relay HBJ normally opened contact (closure),
Cable, breaker normally opened contact QF2 and closing coil HQ constitute closed circuit and are connected.Likewise, if cable failure disconnects, is disconnected
Any one or more is happened for road device normally opened contact QF2 tripping, closing coil HQ breaking-up etc., then coincidence relay after closing a floodgate
HHWJ can not be acted, and shown that closing circuit exists and disconnected failure.Therefore, according to improved DC control circuit design scheme,
Closing circuit and the operating status of trip(ping) circuit are effectively monitored after breaker closing.
To sum up, improved DC control circuit enough realizes the full working scope running state monitoring of DC control circuit.
After breaker receives trip command, DC bus ± KM through jump position latch-in relay TBJ or jump the position time after
Electric appliance TTJ, position time relay delay break contact, cable, breaker normally opened contact QF3 (closure) and breaking coil TQ are jumped
Constitute closed circuit simultaneously be connected, jump position time relay TTJ obtain it is electric after start timing.If breaker normally opened contact QF3 tripping,
After setting time, by jumping position time relay TTJ delay disconnection auxiliary contact cutting trip(ping) circuit and issuing alarm signal.
Similarly, after breaker receives reclosing command, DC bus ± KM is through coincidence latch-in relay HBJ or the coincidence time relay
HTJ, coincidence time relay delay break contact, cable, breaker normally-closed contact QF1 and closing coil HQ constitute closed circuit
And be connected, coincidence time relay HTJ obtain it is electric after start timing.If breaker normally-closed contact QF1 tripping, pass through setting time
Afterwards, it is delayed by coincidence time relay HTJ and disconnects auxiliary contact cutting closing circuit and issue alarm signal.Therefore, improvement side
Case can be avoided loop element and flow through action current for a long time and burn.
To guarantee that cutoff action electric current, time relay setting time should omit again after breaker completes tripping or closing operation
The tripping intrinsic greater than breaker or the sum of closing time and auxiliary contact arcing time, this period is typically not greater than
200ms, and in view of breaker operator loop element longest can only bear the action current of 2s, it can be by the disconnection of the time relay
Delay is set as 400ms.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, in all respects are merely illustrative, not the only.Institute
Have within the scope of the present invention or is included in the invention in the change being equal in the scope of the present invention.
Claims (10)
1. a kind of relay protection DC control circuit, which is characterized in that including closing circuit and trip(ping) circuit；
Closing circuit includes combined floodgate guard relay HBJ normally opened contact, automatic closing contact ZHJ, closing by hand contact SHJ, closes
Lock guard relay HBJ, breaker normally closed auxiliary contact QF1, closing coil HQ and jump position relay TWJ；It closes a floodgate and keeps relay
After device HBJ normally opened contact, automatic closing contact ZHJ, closing by hand contact SHJ are in parallel, one end connects DC bus+KM, another
End series connection one end combined floodgate guard relay HBJ；It is normally opened to jump position latch-in relay TBJ for branch series connection where jumping position relay TWJ
Contact, while at branch both ends parallel connection one by coincidence relay HHWJ after closing a floodgate and the normally opened touching of combined floodgate guard relay HBJ
The branch that point is composed in series；
Trip(ping) circuit include jump position latch-in relay TBJ normally opened contact, automatic closing contact ZTJ, closing by hand contact STJ,
Jump position latch-in relay TBJ, the normally opened auxiliary contact QF3 of breaker, breaking coil TQ and coincidence relay HWJ；Jump position self-insurance
After holding relay TBJ normally opened contact, automatic closing contact ZTJ, closing by hand contact STJ parallel connection, one end connection DC bus+
The one end position latch-in relay TBJ is jumped in KM, other end series connection；Branch series connection combined floodgate guard relay where coincidence relay HWJ
HBJ normally opened contact, while at branch both ends parallel connection one by jumping relay TTWJ in position after tripping and jumping position latch-in relay
The branch that TBJ normally opened contact is composed in series.
2. a kind of relay protection DC control circuit according to claim 1, which is characterized in that combined floodgate guard relay
The both ends HBJ and joint bit time relay HTJ, and with jump position latch-in relay TBJ normally-closed contact and the coincidence time relay
The delay of HTJ disconnects auxiliary contact series connection.
3. a kind of relay protection DC control circuit according to claim 2, which is characterized in that the coincidence time relay
It is straight that the delay of HTJ disconnects auxiliary contact, breaker normally closed auxiliary contact QF1 and closing coil HQ series connection, closing coil HQ connection
Flow bus-KM.
4. a kind of relay protection DC control circuit according to claim 3, which is characterized in that the normally closed auxiliary touching of breaker
Normally opened auxiliary contact QF2 in parallel on point QF1.
5. a kind of relay protection DC control circuit according to claim 4, which is characterized in that coincidence relay HWJ institute
In branch series connection combined floodgate guard relay HBJ normally opened contact, while at branch both ends parallel connection one by jumping position relay after tripping
The branch that device TTWJ and jump position latch-in relay TBJ normally opened contact are composed in series.
6. a kind of relay protection DC control circuit according to claim 5, which is characterized in that jump position latch-in relay
The both ends TBJ and shunt tripping position time relay TTJ, and disconnect auxiliary contact with the delay for jumping position time relay TTJ and connect.
7. a kind of relay protection DC control circuit according to claim 6, which is characterized in that the normally opened auxiliary touching of breaker
Normally closed auxiliary contact QF4 in parallel on point QF3；Jump position time relay TTJ, the normally opened auxiliary contact QF3 of breaker and breaking coil
TQ is sequentially connected in series and connects DC bus-KM.
8. a kind of full working scope of relay protection DC control circuit as claimed in claim 7 monitors and fault early warning method, special
Sign is, comprising:
When breaker receives trip command and is in tripped condition, breaker normally-closed contact QF1 and QF4 closure jump position self-insurance
Relay TBJ normally opened contact closure is held, under normal circumstances, jump position of the DC bus ± KM through jumping position relay TWJ, being closed is certainly
Guard relay TBJ normally opened contact, cable, breaker normally-closed contact QF1 and closing coil HQ constitute closed circuit and are connected；If
Cable failure disconnection, breaker normally-closed contact QF1 tripping, closing coil HQ damage in any one or more happen, jump
Position relay TWJ can not be acted, and shown that closing circuit exists and disconnected failure；
In addition, under normal circumstances, DC bus ± KM jumps position relay TTWJ after tripping, has been closed jump in trip(ping) circuit
Position latch-in relay TBJ normally opened contact, cable, breaker normally-closed contact QF4 and breaking coil TQ constitute closed circuit and lead
It is logical；If cable failure disconnection, breaker normally-closed contact QF4 tripping, breaking coil TQ damage in any one happen, trip
Jumping position relay TTWJ afterwards can not act, and show that trip(ping) circuit exists and disconnect failure；
By jump position relay TWJ and tripping after jump position relay TTWJ movement, realize circuit breaker trip after closing circuit and
The monitoring of the operating status of trip(ping) circuit.
9. a kind of full working scope of relay protection DC control circuit as claimed in claim 7 monitors and fault early warning method, special
Sign is, comprising:
When breaker receives reclosing command and is in "on" position, breaker normally opened contact QF2 and QF3 closure are closed a floodgate and are kept
Relay HBJ normally opened contact closure, under normal circumstances, DC bus ± KM through coincidence relay HWJ, be closed combined floodgate keep after
Electric appliance HBJ normally opened contact, cable, breaker normally opened contact QF3 and breaking coil TQ constitute closed circuit and are connected；If cable is broken
Damage disconnections, breaker normally opened contact QF3 tripping, breaking coil TQ breaking-up in any one or more happen, then coincidence after
Electric appliance HWJ can not be acted, and shown that trip(ping) circuit exists and disconnected failure；
In addition, in closing circuit, under normal circumstances, DC bus ± KM after closing a floodgate coincidence relay HHWJ, be closed conjunction
Lock guard relay HBJ normally opened contact, cable, breaker normally opened contact QF2 and closing coil HQ constitute closed circuit and are connected；
If cable failure disconnection, breaker normally opened contact QF2 tripping, closing coil HQ damage in any one or more happen,
Coincidence relay HHWJ can not be acted after then closing a floodgate, and shown that closing circuit exists and disconnected failure；
By coincidence relay HWJ and close a floodgate after coincidence relay HHWJ movement, realize breaker closing after closing circuit and
The monitoring of the operating status of trip(ping) circuit.
10. a kind of full working scope of relay protection DC control circuit as claimed in claim 7 monitors and fault early warning method, special
Sign is, comprising:
After breaker receives trip command, DC bus ± KM is jumped position latch-in relay TBJ or jumps the position time relay
TTJ, jump position time relay delay break contact, cable, close circuit breaker normally opened contact QF3 and breaking coil TQ composition has been closed
Close circuit simultaneously be connected, jump position time relay TTJ obtain it is electric after start timing；If breaker normally opened contact QF3 tripping, by whole
After fixing time, by jumping position time relay TTJ delay disconnection auxiliary contact cutting trip(ping) circuit and issuing alarm signal；
After breaker receives reclosing command, DC bus ± KM is through combined floodgate guard relay HBJ or the coincidence time relay
HTJ, coincidence time relay delay break contact, cable, breaker normally-closed contact QF1 and closing coil HQ constitute closed circuit
And be connected, coincidence time relay HTJ obtain it is electric after start timing；If breaker normally-closed contact QF1 tripping, pass through setting time
Afterwards, it is delayed by coincidence time relay HTJ and disconnects auxiliary contact cutting closing circuit and issue alarm signal.
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