CN106972469A - A kind of single line of power plant sends out line fault protection system and its guard method - Google Patents
A kind of single line of power plant sends out line fault protection system and its guard method Download PDFInfo
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- CN106972469A CN106972469A CN201710292885.0A CN201710292885A CN106972469A CN 106972469 A CN106972469 A CN 106972469A CN 201710292885 A CN201710292885 A CN 201710292885A CN 106972469 A CN106972469 A CN 106972469A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/267—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for parallel lines and wires
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Abstract
The invention belongs to power generation plant technology field; it is related to a kind of single line and sends out the system that power plant sends out line fault protection; the fast switchback road locking subsystem of subsystem and part is even jumped including system; the system, which even jumps subsystem, includes the 5012 auxiliary contact devices and 5013 auxiliary contact devices composition of series connection, and is connected with the relay group being connected in parallel by 5011 relay, 5012 relay, 5013 relay, 5021 relay, 5022 relay and 5023 relay；The fast switchback road locking subsystem in part is switched by KK, 5012 exclusive circuits and 5013 exclusive circuit parallel connections are constituted, and is connected with the fast pass of cutting for cutting subsystem soon of power plant.A kind of single line sends out the method that power plant sends out line fault protection, including, the system even jumps the method for work of subsystem and the fast switchback road locking subsystem in the part.Beneficial effects of the present invention are：Simple in construction, cost is low；It is safe and reliable to operation；Operation is easy to maintenance.
Description
Technical field
The invention belongs to power generation plant technology field, the single line for being related to a kind of power plant sends out line fault protection system and its guarantor
Maintaining method.
Background technology
Power plant is most in the way of two or more pieces circuit is sent out, and the electric energy that power plant is produced sends into power network, when one
When circuit breaks down, (submitting for not influenceing electric energy) can use another circuit submitting.But sent for some single lines
Go out the power plant of mode, when submitting line breaks down, unit load can not be sent out, mishandling to cause station service full cut-off, machine
The problem of device damages such as group.
For general single outlet power plant, two generator units access 500kV systems in 500kV systems in factories, factory and led to
Cross an outlet feeding power network 500kV transformer station.Every generator unit sets Split type high-voltage Auxiliary Working transformer two, two
Platform unit shares a startup spare transformer, starts spare transformer power supply and is derived from power network 220kV electric power systems, starts standby
Transformer capacity is only identical with single unit high-voltage Auxiliary Working transformer capacity.When power plant is shut down, power plant can not generate electricity
When, it is power plant's each system (Auxiliary System) power supply to enable startup spare transformer, to ensure power plant safety.
Conventional design, when line failure is sent out in power plant, sends out line tripping, but do not start unit full cut-off.This
Planting design can cause：1st, steam turbine main inlet throttle-stop valve does not receive shutdown signal, there is the problem of steam turbine-generator system exceeds the speed limit；
2nd, after line tripping, to prevent because being broken down in power plant because of power failure, potential safety hazard is caused.Therefore part station-service
Equipment is needed to continue power supply, and the continuing to power of the task is undertaken by startup spare transformer, because two units set one and height
Factory becomes the startup spare transformer with capacity, therefore startup spare transformer can not power to full factory's all devices, cause electricity consumption
Shortage phenomenon.
In recent years the southern well-known protection device producer such as auspicious is proposed generator zero energy protection device, but this covering device 150,000
Member or so, cost is higher, though function is more, relative maintenance is also larger.The complete cost of the present invention is no more than 3,000 yuan,
And function is with strong points, power plant can voluntarily install, debug, relatively economical, reliable.
The content of the invention
The purpose of the present invention is to send out power plant there is provided a kind of single line of power plant in view of the shortcomings of the prior art to send out circuit event
Hinder protection system and and its guard method, can economical, reliable, with strong pointsly realize and send out line failure when single
When, unit full cut-off simultaneously carries out auxiliary Power switching, so as to realize safe shutdown.
The technical scheme of the present invention that solves the problems, such as is：A kind of single line of power plant sends out line fault protection system and its protection
Method, the single line of the power plant, which sends out line fault protection system, to be included：Generating power transmission subsystem, system even jump subsystem, portion
Divide fast switchback road locking subsystem, generating power transmission subsystem even jumps subsystem, the fast switchback road locking subsystem in part with system respectively
System connection, the generating power transmission subsystem includes the first generating set, the second generating set, relay group and cuts subsystem soon.
First generating set includes 500KV in 10KVIA sections, 10KVIB sections, 3KVIC sections and 3KVID sections, access factory
5011 switches sets by 5011 Controls are connected with before single line submitting, after system by 5012 Controls
5012 switches sets and 5013 switches sets by 5013 Controls, 5011 switches set have A, B and C items three
Switch, 5012 switches set has A, B and three switches of C items, and 5013 switches set has A, B and C items three
Individual switch；Second generating set is included in 10KVIIA sections, 10KVIIB sections, 3KVIIC sections and 3KVIID sections, access factory
5021 switches sets by 5021 Controls are connected with before single line submitting, after 500KV systems by 5022 relays
5022 switches sets and 5023 switches sets by 5023 Controls of control, 5021 switches set have A, B and C
Three switches, 5022 switches set has A, B and C items three are switched, 5023 switches set have A, B and
Three switches of C items, first generating set and second generating set single line after 500KV systems are converged is exported；
5011 relay, 5012 relay, 5013 relay, 5021 relay, described 5022
Relay, 5023 relay parallel connection form the relay group；
The subsystem of cutting soon is closed by fast cut, is cut circuit soon and section switch is in series；
It is described cut circuit soon and cut circuit and 5013 soon by 5012 cut circuit in parallel soon and constitute, described 5012 cut circuit by ZJ soon
Switch and 5012 operation pressing plates it is in series, described 5013 cut soon circuit by ZJ switch and 5013 operation pressing plates it is in series；Institute
Stating 5012 ZJ switches for cutting circuit soon includes ZJ0 switches, ZJ1 switches, ZJ2 switches, ZJ3 switches；Described 5013 cut electricity soon
The ZJ switches on road include ZJ4 switches, ZJ5 switches, ZJ6 switches, ZJ7 switches；
Described section of switch includes 10KVA sections of switches, 10KVB sections of switches, 3KVC sections of switches and 3KVD sections of switches；
The system, which even jumps subsystem, includes the 5012 auxiliary contact devices and 5013 auxiliary contact devices composition of series connection, and
And connected with the relay group；
The 5012 auxiliary contact device is connected by 5012 auxiliary contacts with tri- auxiliary contacts of DLA, DLB and DLC
KKJ1 switch compositions；The 5013 auxiliary contact device is by 5013 auxiliary contacts with tri- auxiliary contacts of DLA, DLB and DLC
KKJ2 switches of connecting are constituted；
The fast switchback road locking subsystem in part is switched by KK, 5012 exclusive circuits and 5013 exclusive circuits structure in parallel
Into；
5012 exclusive circuit by ZJ0 relays, ZJ1 relays, ZJ2 relays, ZJ3 relays parallel circuit string
Join 5012 auxiliary contacts composition；5013 exclusive circuit is by ZJ4 relays, ZJ5 relays, ZJ6 relays, ZJ7 relays
The auxiliary contact of parallel circuit in series 5013 constitute；
The fast switchback road locking subsystem in the part is connected with the fast pass of cutting for cutting subsystem soon.
Further, the system, which even jumps subsystem, also includes 5012 switches in parallel with the 5012 auxiliary contact device
Overhaul pressing plate and the 5013 switch maintenance pressing plates in parallel with the 5013 auxiliary contact device.
Further, when normally running, the 5012 switch maintenance pressing plate and the 5013 switch maintenance pressing plate are opening
State.
Further, the subsystem of cutting soon also includes permitting hobbing plate, and circuit in parallel is cut soon with described.
Further, it is described permit hob plate permit including 10KVIA section hob plate, 10KVIB section it is fair hob plate, 3KVIC sections it is fair
Hob plate, 3KVID sections permit hob plate, 10KVIIA section permit hob plate, 10KVIIB section it is fair hob plate, 3KVIIC sections it is fair hob plate and
Permit for 3KVIID sections and hob plate.
Further, when normally running, the fair plate that hobs is open mode.
The present invention provides a kind of method that single line of power plant sends out line fault protection, including：
(1) system even jumps the method for work of subsystem：
Described in the KKJ1 switches and the 5013 auxiliary contact device in the 5012 auxiliary contact device
KKJ2 switch closures so that the system even jumps subsystem and enters working condition；
When submitting line breaks down, 5012 switches set and 5013 switches sets are all off, and 5012 auxiliary connects
Tri- auxiliary contact closures of tri- auxiliary contacts of DLA, DLB and DLC of point and DLA, DLB and DLC of 5013 auxiliary contact,
5011 relay, 5012 relay, 5013 relay, 5021 relay, 5022 relay and
5023 actuating of relay so that 5011 switches set, 5012 switches set, 5013 switches set, described 5021
All A, B, C switches of switches set, 5022 switches set and 5023 switches set are all forced to disconnect；
(2) method of work of the fast switchback road locking subsystem in the part：
The KK is switched and closed so that the fast switchback road locking subsystem in part enters working condition；
After 5012 auxiliary contact and 5013 auxiliary contact are closed, pass through the ZJ0 relays, the ZJ1
Relay, the ZJ2 relays, the ZJ3 relays, the ZJ4 relays, the ZJ5 relays, the ZJ6 relays,
The ZJ7 actuatings of relay so that the ZJ0 switches, ZJ1 switches, ZJ2 switches, ZJ3 switches, the ZJ4
Switch, ZJ5 switches, ZJ6 switches and ZJ7 switch closures, 5012 operation pressing plates, 5013 operation pressing plate controls are fast
The locking of switchback road；
After system output auxiliary Power switching instruction, if at least one, which is permitted, hobs plate closing, with permitting for closure
Hob the switch relay work of plate correspondent section, achievement unit subsidiary factory electrical switching operation.
System of the present invention has the beneficial effect that：
1. simple in construction, cost is low；
2. it is safe and reliable to operation；
3. operation is easy to maintenance.
Brief description of the drawings
Fig. 1 is the system structure diagram.
Fig. 2 is the power transmission power generation sub-system structural representation.
Fig. 3 is the schematic diagram that system even jumps subsystem.
Fig. 4 is the fast switchback road locking subsystem schematic diagram in the part.
Fig. 5 cuts subsystem schematic diagram soon to be described.
Fig. 6 cuts circuit diagram soon to be described.
Fig. 6-1 cuts circuit diagram soon for the described of 10KVIA sections of first generating set.
Fig. 6-2 cuts circuit diagram soon for the described of 10KVIB sections of first generating set.
Fig. 6-3 cuts circuit diagram soon for the described of 3KVIC sections of first generating set.
Fig. 6-4 cuts circuit diagram soon for the described of 3KVID sections of first generating set.
In figure：1- generating power transmission subsystems, the generating sets of 2- first, 21-5011 switches sets, 22-5012 switches sets, 23-
5013 switches sets, 24-10KVIA sections, 25-10KVIB sections, 26-3KVIC sections, 27-3KVID sections, the generating sets of 3- second, 31-
5021 switches sets, 32-5022 switches sets, 33-5023 switches sets, 34-10KVIIA sections, 35-10KVIIB sections, 36-3KVIIC sections,
37-3KVIID sections, 4- relay groups, 41-5011 relays, 42-5012 relays, 43-5013 relays, 44-5021 relays
Device, 45-5022 relays, 46-5023 relays, 5- systems even jump subsystem, 51-5012 auxiliary contact devices, 511-KKJ1
Switch, 512-5012 auxiliary contacts, 513-5012 switch maintenance pressing plates, 52-5013 auxiliary contact devices, 521-KKJ2 switches,
522-5013 auxiliary contacts, 523-5013 switch maintenance pressing plates, the fast switchback road locking subsystem in 6- parts, 61-KK switches, 62-
5012 exclusive circuits, 621-ZJ0 relays, 622-ZJ1 relays, 623-ZJ2 relays, 624-ZJ3 relays, 63-5013
Exclusive circuit, 631-ZJ4 relays, 632-ZJ5 relays, 633-ZJ6 relays, 634-ZJ7 relays, 7- cuts pass soon,
8- cuts circuit soon, and 81-5012 cuts circuit soon, and 811-5012 operation pressing plates, 812-ZJ0 switches, 813-ZJ1 switches, 814-ZJ2 is opened
Close, 815-ZJ3 switches, 82-5013 cuts circuit, 821-5013 operation pressing plates, 822-ZJ4 switches, 823-ZJ5 switches, 824- soon
ZJ6 is switched, 825-ZJ7 switches, and 83-, which permits, hobs plate, permits for 831-10KVIA sections and hobs plate, permits for 832-10KVIB sections and hobs plate,
Permit for 833-3KVIC sections and hob plate, permit for 834-3KVID sections and hob plate, 9- sections of switches, 91-10KVIA sections of switches, 92-10KVIB sections
Switch, 93-3KVIC sections of switches, 94-3KVID sections of switches.
Embodiment
With reference to the accompanying drawings and detailed description, the present invention is further illustrated.
Embodiment one
As shown in figure 1, the system includes, generating power transmission subsystem 1, system even jump subsystem 5, partly switchback road is closed soon
Subsystem 6 is locked, generating power transmission subsystem 1 is even jumped subsystem 5, the fast switchback road locking subsystem 6 in part with system and is connected respectively, institute
State generating power transmission subsystem 1 and even jump subsystem 5, portion including the first generating set 2, the second generating set 3, relay group 4, system
Divide fast switchback road locking subsystem 6 and cut subsystem soon,
As shown in Fig. 2 described first generates electricity 2 groups including 10KVIA sections, 10KVIB sections, 3KVIC sections and 3KVID sections, access
5011 switches sets 21 controlled by 5011 relays 41 are connected with after 500KV systems before single line submitting, pass through in factory
5012 switches sets 22 of 5012 relays 42 control and 5013 switches sets 23 controlled by 5013 relays 43, described 5011 open
Pass group 21 has A, B and three switches of C items, and 5012 switches set 22 has A, B and three switches of C items, described
5013 switches sets 23 have A, B and three switches of C items；Second generating set 3 includes 10KVIIA sections, 10KVIIB
Section, 3KVIIC section and 3KVIID section, access in factory and be connected with before single line is sent out by 5021 relays 44 after 500KV systems
Control 5021 switches sets 31, by 5022 relays 45 control 5022 switches sets 32 and pass through 5023 relays 46 control
5023 switches sets 33,5021 switches set 31 has A, B and three switches of C items, and 5022 switches set 32 has A
Item, B and three switches of C items, 5023 switches set 33 have A, B and three switches of C items, first generating set
2 and second generating set 3 after 500KV systems are converged single line export；
As shown in figure 3,5011 relay 41,5012 relay 42,5013 relay 43, described 5021
Relay 44,5022 relay 45,5023 relay 46 are in parallel to form the relay group 4；
As shown in figure 5, the subsystem of cutting soon is closed 7, is cut circuit 8 soon and section switch 9 is in series by fast cut；
As shown in Fig. 6,6-1,6-2,6-3 and 6-4, it is described cut circuit 8 soon and cut circuit 81 and 5013 soon by 5012 cut electricity soon
Road 82 is in parallel to be constituted, and described 5012 cut that circuit 81 is in series by ZJ switches and 5012 operation pressing plates 811 soon, and described 5013 cut soon
Circuit 82 is in series by ZJ switches and 5013 operation pressing plates 821；Described 5012 ZJ switches for cutting circuit 81 soon include ZJ0
Switch 812, ZJ1 switches 813, ZJ2 switches 814, ZJ3 switches 815；Described 5013 ZJ switches for cutting circuit 82 soon include
ZJ4 switches 822, ZJ5 switches 823, ZJ6 switches 824, ZJ7 switches 825；
Described section of switch 9 includes 10KVA sections of switches, 10KVB sections of switches, 3KVC sections of switches and 3KVD sections of switches；
The system, which even jumps subsystem 5, includes 52 groups of the 5012 auxiliary contact devices 51 and 5013 auxiliary contact devices of series connection
Into, and connected with the relay group 4；
The 5012 auxiliary contact device 51 is by 5012 auxiliary contacts 512 with tri- auxiliary contacts of DLA, DLB and DLC
KKJ1 switches 511 of connecting are constituted；The 5013 auxiliary contact device 52 is by with tri- auxiliary contacts of DLA, DLB and DLC
5013 auxiliary contacts 522 series connection KKJ2 switches 521 are constituted；
As shown in figure 4, the fast switchback road locking subsystem 6 in part switchs 61,5012 exclusive circuits 62 and 5013 by KK
Exclusive circuit 63 is in parallel to be constituted；
5012 exclusive circuit 62 is by ZJ0 relays 621, ZJ1 relays 622, ZJ2 relays 623, ZJ3 relays
5012 auxiliary contacts 512 are constituted described in 624 parallel circuit in series；5013 exclusive circuit 63 is by ZJ4 relays 631, ZJ5
Relay 632, ZJ6 relays 633,5013 auxiliary contacts 522 described in the parallel circuit in series of ZJ7 relays 634 are constituted；
The fast switchback road locking subsystem 6 in the part is connected with the fast pass 7 of cutting for cutting subsystem soon.
Further, as shown in figure 3, system company jump subsystem 5 also includes and the 5012 auxiliary contact device 51
5012 switch maintenance pressing plates 513 and the 5013 switch maintenance pressing plates 523 in parallel with the 5013 auxiliary contact device 52 in parallel.
Further, when normally running, the 5012 switch maintenance pressing plate 513 and the 5013 switch maintenance pressing plate 523
For open mode.
When tri- auxiliary contacts of described DLA, DLB and DLC of the 5012 auxiliary contact device 51 break down, closure
The 5012 switch maintenance pressing plate 513,5012 auxiliary contact devices 51 described in short circuit, it is ensured that the system is even jumping subsystem 5 just
Often in the case of operation, tri- auxiliary contacts of described DLA, DLB and DLC of the 5012 auxiliary contact device 51 are examined
Repair；Equally, when tri- auxiliary contacts of described DLA, DLB and DLC of the 5013 auxiliary contact device 52 break down, closure
The 5013 switch maintenance pressing plate 523,5013 auxiliary contact devices 52 described in short circuit, it is ensured that the system is even jumping subsystem 5 just
Often in the case of operation, tri- auxiliary contacts of described DLA, DLB and DLC of the 5013 auxiliary contact device 52 are examined
Repair.
Further, as shown in fig. 6, the subsystem of cutting soon also includes permitting hobbing plate 83, circuit 8 is cut soon simultaneously with described
Connection.
Further, as shown in Fig. 6-1,6-2,6-3 and 6-4, the fair plate 83 that hobs includes first generating set 2
10KVIA sections permit to hob plate 831,10KVIB section and permit and hob plate 832,3KVIC section and fair hob plate 833,3KVID sections and fair hob plate
834 and the 10KVIIA sections of second generating set 3 permit to hob plate, 10KVIIB section and permit and hob plate, 3KVIIC sections and fair hob plate
Permit with 3KVIID sections and hob plate.
Further, when normally running, the fair plate 83 that hobs is open mode.
After the output auxiliary Power switching instruction of power plant G-T protective device, if certain section it is described permit hob plate 83 and close
Close, the switch relay work of this section, achievement unit subsidiary factory electrical switching operation.
The present invention provides a kind of method that single line of power plant sends out line fault protection, including：
(1) system even jumps the method for work of subsystem 5：
By in the KKJ1 switches 511 and the 5013 auxiliary contact device 52 in the 5012 auxiliary contact device 51
KKJ2 switches 521 close so that the system even jumps subsystem 5 and enters working condition；
When submitting line breaks down, the switches set 23 of 5012 switches set 22 and 5013 is all off, and described 5012 is auxiliary
Tri- auxiliary contacts of DLA, DLB and DLC of adjuvant grafting point 512 and DLA, DLB and DLC tri- of 5013 auxiliary contact 522 are auxiliary
Help junction closure, 5011 relay 41,5012 relay 42,5013 relay 43,5021 relay
44th, 5022 relay 45 and 5023 relay 46 are acted so that 5011 switches set 21,5012 switches set
22nd, 5013 switches set 23,5021 switches set 31,5022 switches set 32 and 5023 switches set 33 is all
A, B, C switches are all forced to disconnect；
(2) method of work of the fast switchback road locking subsystem 6 in the part：
KK switches 61 are closed so that the fast switchback road locking subsystem 6 in part enters working condition.
ZJ0 relays 621 in the locking subsystem 6 and the ZJ4 relays 631 control 10KVIA section with
The ZJ0 of 10KVIIA sections of (not shown) switchs 812 and ZJ4 switches 822；The ZJ1 relays in the locking subsystem 6
622 and the ZJ5 relays 632 control the 813 and ZJ5 of ZJ1 switches of 10KVIB section and 10KVIIB section (not shown) to switch
823；The ZJ2 relays 623 and the ZJ6 relays 633 in the locking subsystem 6 control 3KVIC sections and 3KVIIC
The ZJ2 of section (not shown) switchs 814 and ZJ6 switches 824；The ZJ3 relays 624 and institute in the locking subsystem 6
Stating ZJ7 relays 634 controls the ZJ3 of 3KVID sections and 3KVIID sections (not shown) to switch 815 and ZJ7 switches 825；
After 5012 auxiliary contact 512 and 5013 auxiliary contact 522 are closed, pass through the ZJ0 relays
621st, ZJ1 relays 622, the ZJ2 relays 623, the ZJ3 relays 624, the ZJ4 relays 631, described
ZJ5 relays 632, the ZJ6 relays 633, the ZJ7 relays 634 are acted so that the ZJ0 switches 812, the ZJ1
Switch 813, ZJ2 switches 814, ZJ3 switches 815, ZJ4 switches 822, ZJ5 switches 823, the ZJ6 are opened
Close 824 and ZJ7 switches 825 to close, the 5012 operation pressing plate 811, the 5013 operation pressing plate 821 control fast switchback road
Locking；After the output auxiliary Power switching instruction of power plant G-T protective device, if at least one it is described permit hob plate 83 and close,
Then the fair switch relay for hobbing the correspondent section of plate 83 with closure works, achievement unit subsidiary factory electrical switching operation.
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from substantive content of the present invention, art technology
Any deformation that personnel are contemplated that, improvement, replace and each fall within protection scope of the present invention.
Claims (7)
1. a kind of single line of power plant sends out line fault protection system, it is characterised in that generating power transmission subsystem, system even jump son
System, the fast switchback road locking subsystem in part, generating power transmission subsystem are even jumped subsystem, the fast switchback road in part with system and closed respectively
Subsystem connection is locked, the generating power transmission subsystem includes the first generating set, the second generating set, relay group and cuts son soon
System；
First generating set includes 500KV systems in 10KVIA sections, 10KVIB sections, 3KVIC sections and 3KVID sections, access factory
Afterwards 5011 switches sets by 5011 Controls, 5012 by 5012 Controls are connected with before single line submitting
Switches set and 5013 switches sets by 5013 Controls, 5011 switches set has A, B and C items three are opened
Close, 5012 switches set has A, B and three switches of C items, 5013 switches set has A, B and C items three
Switch；Second generating set includes 500KV in 10KVIIA sections, 10KVIIB sections, 3KVIIC sections and 3KVIID sections, access factory
5021 switches sets by 5021 Controls are connected with before single line submitting, after system by 5022 Controls
5022 switches sets and 5023 switches sets by 5023 Controls, 5021 switches set have A, B and C items three
Switch, 5022 switches set has A, B and three switches of C items, and 5023 switches set has A, B and C items three
Individual switch, first generating set and second generating set single line after 500KV systems are converged are exported；
5011 relay, 5012 relay, 5013 relay, 5021 relay, 5022 relay
Device, 5023 relay parallel connection form the relay group；
The subsystem of cutting soon is closed by fast cut, is cut circuit soon and section switch is in series；
It is described cut circuit soon and cut circuit and 5013 soon by 5012 cut circuit in parallel soon and constitute, described 5012 cut circuit soon is switched by ZJ
With 5012 operation pressing plates it is in series, described 5013 cut soon circuit by ZJ switch and 5013 operation pressing plates it is in series；It is described
5012 ZJ switches for cutting circuit soon include ZJ0 switches, ZJ1 switches, ZJ2 switches, ZJ3 switches；Described 5013 cut circuit soon
The ZJ switch include ZJ4 switch, ZJ5 switch, ZJ6 switch, ZJ7 switch；
Described section of switch includes 10KVA sections of switches, 10KVB sections of switches, 3KVC sections of switches and 3KVD sections of switches；
The 5012 auxiliary contact devices and 5013 auxiliary contact devices that the system even jumps subsystem and includes connecting are constituted, and with
The relay group series connection；
The 5012 auxiliary contact device is by the 5012 auxiliary contacts series connection KKJ1 with tri- auxiliary contacts of DLA, DLB and DLC
Switch composition；The 5013 auxiliary contact device is connected by 5013 auxiliary contacts with tri- auxiliary contacts of DLA, DLB and DLC
KKJ2 switch compositions；
The fast switchback road locking subsystem in part is switched by KK, 5012 exclusive circuits and 5013 exclusive circuit parallel connections are constituted；
5012 exclusive circuit by ZJ0 relays, ZJ1 relays, ZJ2 relays, ZJ3 relays parallel circuit in series
5012 auxiliary contacts are constituted；5013 exclusive circuit is by ZJ4 relays, ZJ5 relays, ZJ6 relays, ZJ7 relays
The auxiliary contact of parallel circuit in series 5013 is constituted；
The fast switchback road locking subsystem in the part is connected with the fast pass of cutting for cutting subsystem soon.
2. system according to claim 1, it is characterised in that the system even jump subsystem also include with it is described 5012 auxiliary
Help contact arrangement 5012 switch maintenance pressing plates in parallel and the 5013 switch maintenance pressures in parallel with the 5013 auxiliary contact device
Plate.
3. system according to claim 2, it is characterised in that when normally running, the 5012 switch maintenance pressing plate and institute
5013 switch maintenance pressing plates are stated for open mode.
It is and described 4. system according to claim 1, it is characterised in that the subsystem of cutting soon also includes permitting hobbing plate
Circuit in parallel is cut soon.
5. system according to claim 4, it is characterised in that it is described permit hob plate including 10KVIA section it is fair hob plate,
Permit to hob plate, 3KVIC section and permit for 10KVIB sections and hob plate, 3KVID section and fair hob plate, 10KVIIA sections and fair hob plate, 10KVIIB section
Permit to hob plate, 3KVIIC section and permit and hob that plate and 3KVIID sections are fair to hob plate.
6. the system according to claim 4 or 5, it is characterised in that when normally running, the fair plate that hobs is open shape
State.
7. the fault protecting method of system according to claim 1, it is characterised in that including：
(1) system even jumps the method for work of subsystem：
By the KKJ2 in the KKJ1 switches and the 5013 auxiliary contact device in the 5012 auxiliary contact device
Switch closure so that the system even jumps subsystem and enters working condition；
When submitting line breaks down, 5012 switches set and 5013 switches sets are all off, 5012 auxiliary contact
Tri- auxiliary contact closures of DLA, DLB and DLC of tri- auxiliary contacts of DLA, DLB and DLC and 5013 auxiliary contact, it is described
5011 relays, 5012 relay, 5013 relay, 5021 relay, 5022 relay and described
5023 actuatings of relay so that 5011 switches set, 5012 switches set, 5013 switches set, 5021 switch
All A, B, C switches of group, 5022 switches set and 5023 switches set are all forced to disconnect；
(2) method of work of the fast switchback road locking subsystem in the part：
The KK is switched and closed so that the fast switchback road locking subsystem in part enters working condition；
After 5012 auxiliary contact and 5013 auxiliary contact are closed, pass through the ZJ0 relays, the ZJ1 relays
It is device, the ZJ2 relays, the ZJ3 relays, the ZJ4 relays, the ZJ5 relays, the ZJ6 relays, described
The ZJ7 actuatings of relay so that the ZJ0 switches, ZJ1 switches, ZJ2 switches, ZJ3 switches, the ZJ4 are opened
Close, ZJ5 switches, ZJ6 switches and ZJ7 switches are closed, 5012 operation pressing plates, 5013 operation pressing plate controls are cut soon
Loop locking；After power plant's G-T protective device output auxiliary Power switching instruction, if at least one, which is permitted, hobs plate closing,
Described with closure permits the switch relay for hobbing plate correspondent section to work, achievement unit subsidiary factory electrical switching operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710292885.0A CN106972469B (en) | 2017-04-28 | 2017-04-28 | A kind of the single line submitting line fault protection system and its guard method of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710292885.0A CN106972469B (en) | 2017-04-28 | 2017-04-28 | A kind of the single line submitting line fault protection system and its guard method of power plant |
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| CN108054785A (en) * | 2018-01-27 | 2018-05-18 | 丘健兴 | A kind of circuit for preventing wind power plant island-grid |
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