CN106972469B - A kind of the single line submitting line fault protection system and its guard method of power plant - Google Patents
A kind of the single line submitting line fault protection system and its guard method of power plant Download PDFInfo
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- CN106972469B CN106972469B CN201710292885.0A CN201710292885A CN106972469B CN 106972469 B CN106972469 B CN 106972469B CN 201710292885 A CN201710292885 A CN 201710292885A CN 106972469 B CN106972469 B CN 106972469B
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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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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention belongs to power generation plant technology fields; it is related to a kind of system that single line sends out power plant's submitting line fault protection; the fast switchback road of subsystem and part is even jumped including system is latched subsystem; it includes concatenated 5012 auxiliary contact device and 5013 auxiliary contact devices composition that the system, which even jumps subsystem, 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 made of KK switch, 5012 exclusive circuits and 5013 exclusive circuit parallel connections, is connected with the fast incision pass for cutting subsystem fastly of power plant.A kind of method that single line sends out power plant's submitting line fault protection, including, the system even jumps the working method of the fast switchback road locking subsystem of subsystem and the part.The invention has the benefit that structure is simple, it is at low cost；It is safe and reliable to operation；It operates 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 technique
Power plant majority is sent into power grid in such a way that two or more pieces route is sent out, by the electric energy of power plant's production, when one
When route breaks down, (submitting for not influencing electric energy) can be used another route and send out.But some single lines are sent
The power plant of mode out, when submitting line breaks down, unit load can not be sent out, mishandling to will cause station service full cut-off, machine
The problem of equipment damages such as group.
For general single outlet power plant, two generator units access 500kV system in factories, and 500kV system is logical in factory
It crosses an outlet and is sent into power grid 500kV substation.Every generator unit sets Split type high-voltage Auxiliary Working transformer two, and two
Platform unit shares a starting spare transformer, and starting spare transformer power supply is derived from power grid 220kV power supply system, starts spare
Transformer capacity is only identical as single unit high-voltage Auxiliary Working transformer capacity.When power plant is shut down, power plant can not generate electricity
When, starting spare transformer is enabled for each system of power plant (Auxiliary System) power supply, to ensure power plant safety.
Conventional design sends out line tripping, but do not start unit full cut-off when line failure is sent out in power plant.This
Kind design will lead to: 1, steam turbine main inlet throttle-stop valve does not receive shutdown signal, there are problems that steam turbine-generator system hypervelocity；
2, after line tripping, to prevent because breaking down in power plant because of power failure, security risk is caused.Therefore part station-service
Equipment needs continue to power, and the continuing power supply of the task is undertaken by starting spare transformer, since one and height is arranged in two units
Factory becomes the starting spare transformer with capacity, therefore starting spare transformer cannot power to full factory's all devices, cause electricity consumption
Shortage phenomenon.
In recent years the southern well-known protective device producer such as auspicious is proposed generator zero energy protective device, but this covering device 150,000
Member or so, cost is relatively high, though function is more, opposite maintenance is also larger.Complete cost of the invention is no more than 3,000 yuan,
And function is with strong points, power plant can voluntarily install, debug, relatively economical, reliable.
Summary of the invention
Power plant, which is sent out, in view of the deficiencies of the prior art, it is an object of the present invention to provide a kind of single line of power plant sends out route event
Hinder protection system and and its guard method, can realize economically, reliable, with strong points ought singly send out line failure
When, unit full cut-off simultaneously carries out auxiliary Power switching, to realize safe shutdown.
The technical solution that the present invention solves the problems, such as is: a kind of the single line submitting line fault protection system and its protection of power plant
Method, it includes: power generation power transmission subsystem, system even jump subsystem, portion that the single line of the power plant, which sends out line fault protection system,
Fast switchback road is divided to be latched subsystem, the power transmission subsystem that generates electricity even jumps subsystem, partially fast switchback road locking subsystem with system respectively
System connection, the power generation power transmission subsystem include the first generating set, the second generating set, relay group and cut subsystem fastly.
First generating set includes 10KVIA sections, 10KVIB sections, 3KVIC sections and 3KVID sections, accesses 500KV in factory
5011 switching groups controlled by 5011 relays are connected with after system before single line submitting, by the control of 5012 relays
5012 switching groups and 5013 switching groups controlled by 5013 relays, 5011 switching group have A, B and C item three
Switch, 5012 switching group have A, B and C item three switches, and 5013 switching group has A, B and C item three
A switch；Second generating set includes 10KVIIA sections, 10KVIIB sections, 3KVIIC sections and 3KVIID sections, is accessed in factory
5021 switching groups controlled by 5021 relays are connected with after 500KV system before single line submitting, by 5022 relays
5022 switching groups of control and 5023 switching groups controlled by 5023 relays, 5021 switching group have A, B and C
There are A, B and C item three to switch for three switches, 5022 switching group, 5023 switching group with A, B and
C item three switches, first generating set and second generating set single line after 500KV system is converged export；
5011 relay, 5012 relay, 5013 relay, 5021 relay, described 5022
Relay, the 5023 relay parallel connection form the relay group；
It is described cut fastly subsystem by cut fastly pass, fastly cut circuit and section switch it is in series；
It is described cut circuit fastly and cut circuit and 5013 fastly by 5012 cut circuit in parallel fastly and constitute, described 5012 cut circuit by ZJ fastly
Switch and 5012 operation pressing plates it is in series, described 5013 cut fastly circuit by ZJ switch and 5013 operation pressing plates it is in series；Institute
Stating the ZJ switch that 5012 cut circuit fastly includes ZJ0 switch, ZJ1 switch, ZJ2 switch, ZJ3 switch；Described 5013 cut electricity fastly
The ZJ switch on road includes 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；
It includes concatenated 5012 auxiliary contact device and 5013 auxiliary contact devices composition that the system, which even jumps subsystem, and
And it connects 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 composition；The 5013 auxiliary contact device is by 5013 auxiliary contacts with tri- auxiliary contacts of DLA, DLB and DLC
KKJ2 switch of connecting forms；
The fast switchback road locking subsystem in part is by KK switch, 5012 exclusive circuits and 5013 exclusive circuit parallel connection structures
At；
5012 exclusive circuit by ZJ0 relay, ZJ1 relay, ZJ2 relay, ZJ3 relay parallel circuit string
Join 5012 auxiliary contacts composition；5013 exclusive circuit is by ZJ4 relay, ZJ5 relay, ZJ6 relay, ZJ7 relay
5013 auxiliary contact of parallel circuit in series constitute；
The fast switchback road locking subsystem in the part is connected with the fast incision pass for cutting subsystem fastly.
Further, it further includes 5012 switches in parallel with the 5012 auxiliary contact device that the system, which even jumps subsystem,
Overhaul pressing plate and the 5013 switch maintenance pressing plates in parallel with the 5013 auxiliary contact device.
Further, when normal operation, the 5012 switch maintenance pressing plate and the 5013 switch maintenance pressing plate are to open
State.
Further, the subsystem of cutting fastly further includes permitting to hob plate, cuts circuit in parallel fastly with described.
Further, it is described permit hob plate include 10KVIA section permit 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 hobs plate.
Further, when normal operation, it is described permit hob plate and be in an open state.
The present invention provides the method that a kind of single line of power plant sends out line fault protection, comprising:
(1) system even jumps the working method of subsystem:
Described in the KKJ1 switch and the 5013 auxiliary contact device in the 5012 auxiliary contact device
KKJ2 is closed the switch, so that the system, which even jumps subsystem, enters working condition；
When submitting line breaks down, 5012 switching group and 5013 switching groups are all off, and 5012 auxiliary connects
Tri- auxiliary contacts of DLA, DLB and DLC of point and tri- auxiliary contact closures of 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 switching group, 5012 switching group, 5013 switching group, described 5021
All A, B, C switches of switching group, 5022 switching group and 5023 switching group are all forced to disconnect；
(2) working method of the fast switchback road locking subsystem in the part:
The KK is closed the switch, so that the fast switchback road locking subsystem in the part enters working condition；
After 5012 auxiliary contact and 5013 auxiliary contact are closed, pass through the ZJ0 relay, the ZJ1
Relay, the ZJ2 relay, the ZJ3 relay, the ZJ4 relay, the ZJ5 relay, the ZJ6 relay,
The ZJ7 actuating of relay, so that ZJ0 switch, ZJ1 switch, ZJ2 switch, ZJ3 switch, the ZJ4
Switch, ZJ5 switch, ZJ6 switch and the ZJ7 are closed the switch, and 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. structure is simple, at low cost；
2. safe and reliable to operation；
3. operating easy to maintenance.
Detailed description of the invention
Fig. 1 is the system structure diagram.
Fig. 2 is the power transmission power generation sub-system structural schematic diagram.
Fig. 3 is the schematic diagram that system even jumps subsystem.
Fig. 4 is that the fast switchback road in the part is latched subsystem schematic diagram.
Fig. 5 cuts subsystem schematic diagram to be described fastly.
Fig. 6 cuts circuit diagram to be described fastly.
Fig. 6-1 is that the described of 10KVIA section of first generating set cuts circuit diagram fastly.
Fig. 6-2 is that the described of 10KVIB section of first generating set cuts circuit diagram fastly.
Fig. 6-3 is that the described of 3KVIC section of first generating set cuts circuit diagram fastly.
Fig. 6-4 is that the described of 3KVID section of first generating set cuts circuit diagram fastly.
In figure: 1- power generation power transmission subsystem, the first generating set of 2-, 21-5011 switching group, 22-5012 switching group, 23-
5013 switching groups, 24-10KVIA sections, 25-10KVIB sections, 26-3KVIC sections, 27-3KVID sections, the second generating set of 3-, 31-
5021 switching groups, 32-5022 switching group, 33-5023 switching group, 34-10KVIIA sections, 35-10KVIIB sections, 36-3KVIIC sections,
37-3KVIID sections, 4- relay group, 41-5011 relay, 42-5012 relay, 43-5013 relay, 44-5021 relay
Device, 45-5022 relay, 46-5023 relay, 5- system even jump subsystem, 51-5012 auxiliary contact device, 511-KKJ1
Switch, 512-5012 auxiliary contact, 513-5012 switch maintenance pressing plate, 52-5013 auxiliary contact device, 521-KKJ2 switch,
522-5013 auxiliary contact, 523-5013 switch maintenance pressing plate, the fast switchback road in the part 6- are latched subsystem, 61-KK switch, 62-
5012 exclusive circuits, 621-ZJ0 relay, 622-ZJ1 relay, 623-ZJ2 relay, 624-ZJ3 relay, 63-5013
Exclusive circuit, 631-ZJ4 relay, 632-ZJ5 relay, 633-ZJ6 relay, 634-ZJ7 relay, 7- cut pass fastly,
8- cuts circuit fastly, and 81-5012 cuts circuit fastly, and 811-5012 runs pressing plate, 812-ZJ0 switch, and 813-ZJ1 is switched, and 814-ZJ2 is opened
It closes, 815-ZJ3 switch, 82-5013 cuts circuit fastly, and 821-5013 runs pressing plate, 822-ZJ4 switch, 823-ZJ5 switch, 824-
ZJ6 switch, 825-ZJ7 switch, 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, permits 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.
Specific 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 comprises power generation power transmission subsystem 1, systems even to jump subsystem 5, the fast switchback road in part is closed
Subsystem 6 is locked, power generation power transmission subsystem 1 even jumps subsystem 5 with system respectively, the fast switchback road locking subsystem 6 in part is connect, institute
Stating power generation power transmission subsystem 1 includes the first generating set 2, the second generating set 3, relay group 4, system even jump subsystem 5, portion
Divide fast switchback road locking subsystem 6 and cut subsystem fastly,
As shown in Fig. 2, first 2 groups of the power generation includes 10KVIA sections, 10KVIB sections, 3KVIC sections and 3KVID sections, access
5011 switching groups 21 controlled by 5011 relays 41 are connected with before single line submitting after 500KV system in factory, are passed through
5012 switching groups 22 of 5012 relays 42 control and 5013 switching groups 23 controlled by 5013 relays 43, described 5011 open
Pass group 21 has A, B and C item three switches, and 5012 switching group 22 has A, B and C item three switches, described
5013 switching groups 23 have A, B and C item three switches；Second generating set 3 includes 10KVIIA sections, 10KVIIB
Section, 3KVIIC sections and 3KVIID sections are accessed in factory and are connected with before single line submitting through 5021 relays 44 after 500KV system
Control 5021 switching groups 31, by 5022 relays 45 control 5022 switching groups 32 and pass through 5023 relays 46 control
5023 switching groups 33,5021 switching group 31 have A, B and C item three switches, and 5022 switching group 32 has A
Item, B and C item three switches, 5023 switching group 33 have A, B and C item three switches, first generating set
2 and second generating set 3 after 500KV system is 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 fastly is by cutting pass 7 fastly, cutting circuit 8 fastly and section switch 9 is in series；
As shown in Fig. 6,6-1,6-2,6-3 and 6-4, it is described cut circuit 8 fastly and cut circuit 81 and 5013 fastly by 5012 cut electricity fastly
Road 82 is in parallel to be constituted, and described 5012 cut that circuit 81 is in series by ZJ switch and 5012 operation pressing plates 811, and described 5013 cut fastly fastly
Circuit 82 is in series by ZJ switch and 5013 operation pressing plates 821；Described 5012 ZJ switches for cutting circuit 81 fastly include ZJ0
Switch 812, ZJ1 switch 813, ZJ2 switch 814, ZJ3 switch 815；Described 5013 ZJ for cutting circuit 82 fastly, which are switched, includes
ZJ4 switch 822, ZJ5 switch 823, ZJ6 switch 824, ZJ7 switch 825；
Described section of switch 9 includes 10KVA sections of switches, 10KVB sections of switches, 3KVC sections of switches and 3KVD sections of switches；
It includes 52 groups of concatenated 5012 auxiliary contact device 51 and 5013 auxiliary contact devices that the system, which even jumps subsystem 5,
At, and connect 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 switch 511 of connecting forms；The 5013 auxiliary contact device 52 is by with tri- auxiliary contacts of DLA, DLB and DLC
5013 auxiliary contacts 522 series connection KKJ2 switch 521 forms；
As shown in figure 4, the fast switchback road locking subsystem 6 in part is by KK switch 61,5012 exclusive circuits 62 and 5013
Exclusive circuit 63 is in parallel to be constituted；
5012 exclusive circuit 62 is by ZJ0 relay 621, ZJ1 relay 622, ZJ2 relay 623, ZJ3 relay
5012 auxiliary contacts 512 described in 624 parallel circuit in series are constituted；5013 exclusive circuit 63 is by ZJ4 relay 631, ZJ5
Relay 632, ZJ6 relay 633, ZJ7 relay 634 parallel circuit in series described in 5013 auxiliary contacts 522 constitute；
The fast switchback road locking subsystem 6 in the part is closed 7 with the fast incision for cutting subsystem fastly to connect.
Further, as shown in figure 3, system company jump subsystem 5 further 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 normal operation, the 5012 switch maintenance pressing plate 513 and the 5013 switch maintenance pressing plate 523
It is in an open state.
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 is shorted the 5012 auxiliary contact device 51, guarantees that the system is even jumping subsystem 5 just
Often in the case where operation, tri- auxiliary contacts of described DLA, DLB and DLC of the 5012 auxiliary contact device 51 are examined
It repairs；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 is shorted the 5013 auxiliary contact device 52, guarantees that the system is even jumping subsystem 5 just
Often in the case where operation, tri- auxiliary contacts of described DLA, DLB and DLC of the 5013 auxiliary contact device 52 are examined
It repairs.
Further, as shown in fig. 6, the subsystem of cutting fastly further includes permitting to hob plate 83, circuit 8 is cut fastly 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 section 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 section 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 hobs plate.
Further, when normal operation, it is described permit hob plate 83 and be in an open state.
After the output auxiliary Power switching instruction of power plant's generator-transformer protection device, if certain section it is described permit hob plate 83 and close
It closes, the switch relay work of this section, achievement unit subsidiary factory electrical switching operation.
The present invention provides the method that a kind of single line of power plant sends out line fault protection, comprising:
(1) system even jumps the working method of subsystem 5:
It will be in the KKJ1 switch 511 and the 5013 auxiliary contact device 52 in the 5012 auxiliary contact device 51
The KKJ2 switch 521 closure so that the system even jump subsystem 5 enter working condition；
When submitting line breaks down, the switching group 23 of 5012 switching group 22 and 5013 is all off, and described 5012 is auxiliary
DLA, DLB and DLC tri- of tri- auxiliary contacts of DLA, DLB and DLC of adjuvant grafting point 512 and 5013 auxiliary contact 522 are auxiliary
Help junction closure, 5011 relay 41,5012 relay 42,5013 relay 43,5021 relay
44,5022 relay 45 and 5023 relay 46 movement, so that 5011 switching group 21,5012 switching group
22,5013 switching group 23,5021 switching group 31,5022 switching group 32 and 5023 switching group 33 is all
A, B, C switches are all forced to disconnect；
(2) working method of the fast switchback road locking subsystem 6 in the part:
The KK switch 61 is closed, so that the fast switchback road locking subsystem 6 in the part enters working condition.
It is described locking subsystem 6 in the ZJ0 relay 621 and the ZJ4 relay 631 control 10KVIA section with
The ZJ0 switch 812 and ZJ4 switch 822 of 10KVIIA sections of (not shown)；The ZJ1 relay in the locking subsystem 6
622 and the ZJ5 relay 632 controls 10KVIB section and the ZJ1 switch 813 and ZJ5 of 10KVIIB sections of (not shown) switch
823；The ZJ2 relay 623 and the ZJ6 relay 633 in the locking subsystem 6 control 3KVIC sections and 3KVIIC
The ZJ2 switch 814 and ZJ6 switch 824 of section (not shown)；The ZJ3 relay 624 and institute in the locking subsystem 6
State ZJ3 switch 815 and ZJ7 switch 825 that ZJ7 relay 634 controls 3KVID sections and 3KVIID sections of (not shown)；
After 5012 auxiliary contact 512 and 5013 auxiliary contact 522 are closed, pass through the ZJ0 relay
621, the ZJ1 relay 622, the ZJ2 relay 623, the ZJ3 relay 624, the ZJ4 relay 631, described
ZJ5 relay 632, the ZJ6 relay 633, the ZJ7 relay 634 movement, so that the ZJ0 switch 812, the ZJ1
Switch 813, the ZJ2 switch 814, the ZJ3 switch 815, the ZJ4 switch 822, the ZJ5 switch 823, the ZJ6 are opened
824 and the ZJ7 switch 825 closure are closed, 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's generator-transformer protection device, if at least one described fair plate 83 that hobs is closed,
Then work with the fair switch relay for hobbing 83 correspondent section of plate of closure, achievement unit subsidiary factory electrical switching operation.
Present invention is not limited to the embodiments described above, without departing substantially from substantive content of the present invention, art technology
Any deformation, improvement, the replacement that personnel are contemplated that 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, which is characterized in that power generation power transmission subsystem, system even jump son
System, the fast switchback road in part are latched subsystem, and power generation power transmission subsystem even jumps subsystem with system respectively, the fast switchback road in part is closed
Subsystem connection is locked, the power generation power transmission subsystem includes the first generating set, the second generating set, relay group and cuts son fastly
System；
First generating set includes 10KVIA sections, 10KVIB sections, 3KVIC sections and 3KVID sections, accesses 500KV system in factory
5011 switching groups controlled by 5011 relays, control by 5012 relays 5012 are connected with before single line submitting afterwards
Switching group and 5013 switching groups controlled by 5013 relays, 5011 switching group are opened with A, B and C item three
It closes, 5012 switching group has A, B and C item three switches, and 5013 switching group has A, B and C item three
Switch；Second generating set includes 10KVIIA sections, 10KVIIB sections, 3KVIIC sections and 3KVIID sections, accesses 500KV in factory
5021 switching groups controlled by 5021 relays are connected with after system before single line submitting, by the control of 5022 relays
5022 switching groups and 5023 switching groups controlled by 5023 relays, 5021 switching group have A, B and C item three
Switch, 5022 switching group have A, B and C item three switches, and 5023 switching group has A, B and C item three
A switch, first generating set and second generating set single line after 500KV system is converged export；
5011 relay, 5012 relay, 5013 relay, 5021 relay, 5022 relay
Device, the 5023 relay parallel connection form the relay group；
It is described cut fastly subsystem by cut fastly pass, fastly cut circuit and section switch it is in series；
It is described cut circuit fastly and cut circuit and 5013 fastly by 5012 cut circuit in parallel fastly and constitute, described 5012 cut circuit fastly is switched by ZJ
With 5012 operation pressing plates it is in series, described 5013 cut fastly circuit by ZJ switch and 5013 operation pressing plates it is in series；It is described
5012 ZJ switches for cutting circuit fastly include ZJ0 switch, ZJ1 switch, ZJ2 switch, ZJ3 switch；Described 5013 cut circuit fastly
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；
It includes concatenated 5012 auxiliary contact device and 5013 auxiliary contact devices composition that the system, which even jumps subsystem, 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 composition；
The fast switchback road locking subsystem in part is made of KK switch, 5012 exclusive circuits and 5013 exclusive circuit parallel connections；
5012 exclusive circuit by ZJ0 relay, ZJ1 relay, ZJ2 relay, ZJ3 relay parallel circuit in series
5012 auxiliary contacts are constituted；5013 exclusive circuit is by ZJ4 relay, ZJ5 relay, ZJ6 relay, ZJ7 relay
5013 auxiliary contact of parallel circuit in series is constituted；
The fast switchback road locking subsystem in the part is connected with the fast incision pass for cutting subsystem fastly.
2. system according to claim 1, which is characterized in that the system even jump subsystem further include with it is described 5012 auxiliary
Help contact arrangement parallel connection 5012 switch maintenance pressing plates and the 5013 switch maintenance pressures in parallel with the 5013 auxiliary contact device
Plate.
3. system according to claim 2, which is characterized in that when normal operation, the 5012 switch maintenance pressing plate and institute
5013 switch maintenance pressing plates are stated to be in an open state.
4. system according to claim 1, which is characterized in that the subsystem of cutting fastly further includes permitting to hob plate, and described
Circuit in parallel is cut fastly.
5. system according to claim 4, which is characterized in that it is described permit hob plate include 10KVIA section it is fair hob plate,
Permit to hob plate, 3KVIC section and permit for 10KVIB sections and hobs plate, 3KVID section and fair hob plate, 10KVIIA sections and fair hob plate, 10KVIIB section
Permit to hob plate, 3KVIIC section and permit and hobs that plate and 3KVIID sections are fair to hob plate.
6. system according to claim 4 or 5, which is characterized in that when normal operation, the fair plate that hobs is open shape
State.
7. the fault protecting method of system according to claim 1 characterized by comprising
(1) system even jumps the working method of subsystem:
By the KKJ1 switch in the 5012 auxiliary contact device and the KKJ2 in the 5013 auxiliary contact device
It closes the switch, so that the system, which even jumps subsystem, enters working condition；
When submitting line breaks down, 5012 switching group and 5013 switching groups 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 switching group, 5012 switching group, 5013 switching group, 5021 switch
All A, B, C switches of group, 5022 switching group and 5023 switching group are all forced to disconnect；
(2) working method of the fast switchback road locking subsystem in the part:
The KK is closed the switch, so that the fast switchback road locking subsystem in the part enters working condition；
After 5012 auxiliary contact and 5013 auxiliary contact are closed, pass through the ZJ0 relay, the ZJ1 relay
It is device, the ZJ2 relay, the ZJ3 relay, the ZJ4 relay, the ZJ5 relay, the ZJ6 relay, described
The ZJ7 actuating of relay, so that ZJ0 switch, ZJ1 switch, ZJ2 switch, ZJ3 switch, the ZJ4 are opened
Pass, ZJ5 switch, ZJ6 switch and the ZJ7 are closed the switch, and 5012 operation pressing plates, 5013 operation pressing plates are controlled and cut fastly
Circuit locking；After the output auxiliary Power switching instruction of power plant's generator-transformer protection device, 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 |
|---|---|---|---|
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| CN205231835U (en) * | 2015-12-22 | 2016-05-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Structure for large -scale thermal power factory unit high pressure service power each other is being equipped with |
| CN205407404U (en) * | 2016-03-17 | 2016-07-27 | 中国神华能源股份有限公司 | A an equipment and a system of change group for sending out switching of power of change group |
| CN205791789U (en) * | 2016-07-12 | 2016-12-07 | 华自科技股份有限公司 | Power station service power switching device |
| CN206922422U (en) * | 2017-04-28 | 2018-01-23 | 华北电力大学（保定） | A kind of single line of power plant sends out line fault protection system |
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| CN205231835U (en) * | 2015-12-22 | 2016-05-11 | 中国电力工程顾问集团西北电力设计院有限公司 | Structure for large -scale thermal power factory unit high pressure service power each other is being equipped with |
| CN205407404U (en) * | 2016-03-17 | 2016-07-27 | 中国神华能源股份有限公司 | A an equipment and a system of change group for sending out switching of power of change group |
| CN205791789U (en) * | 2016-07-12 | 2016-12-07 | 华自科技股份有限公司 | Power station service power switching device |
| CN206922422U (en) * | 2017-04-28 | 2018-01-23 | 华北电力大学（保定） | A kind of single line of power plant sends out line fault protection system |
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