CN104539043B - A kind of automatic switching device of standby power supply system haul oneself willingly into method - Google Patents
A kind of automatic switching device of standby power supply system haul oneself willingly into method Download PDFInfo
- Publication number
- CN104539043B CN104539043B CN201410765468.XA CN201410765468A CN104539043B CN 104539043 B CN104539043 B CN 104539043B CN 201410765468 A CN201410765468 A CN 201410765468A CN 104539043 B CN104539043 B CN 104539043B
- Authority
- CN
- China
- Prior art keywords
- signal
- cut
- inlet wire
- mother
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000011218 segmentation Effects 0.000 claims abstract description 20
- 238000000518 rheometry Methods 0.000 claims description 22
- 230000006837 decompression Effects 0.000 claims description 10
- 230000001052 transient effect Effects 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 2
- 230000005611 electricity Effects 0.000 abstract description 21
- 230000000875 corresponding effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A kind of automatic switching device of standby power supply system and its haul oneself willingly into method.Provide a kind of safe, automatic discrimination bus-bar fault, and corresponding action policy is executed according to position of failure point, isolated fault, the automatic switching device of standby power supply system for restoring electricity and its haul oneself willingly into method.Including inlet wire M, inlet wire N, bus, automatic switching device of standby power supply and segmentation combining unit; the inlet wire M and inlet wire N connect the bus respectively; the bus connects the segmentation combining unit, and the segmentation combining unit connects collection plate, the collection plate connection protection board and management board；Inlet wire prepared auto restart LBZT1 be suitable for the method for operation be：Inlet wire M is standby, inlet wire N runs, block switch operation；Segmentation prepared auto restart FBZT be suitable for the method for operation be：Inlet wire M runs, and inlet wire N runs, and block switch is standby.The present invention improves the security of equipment, can restore electricity.
Description
Technical field
The present invention relates to electric power facility field, more particularly to a kind of automatic switching device of standby power supply system haul oneself willingly into method.
Background technology
When traditional automatic switching device of standby power supply is applied to 110kV single-trunk segmental wiring form electric substation, when bus is sent out
Raw permanent fault, as 110kV bus does not typically configure the protection of special mother line, transform er differential protection scope does not also include
110kV bus, bus-bar fault will be cut off by supply line's mains side relay protection action, automatic closing dress after bus loss of pressure
Action is put, stand-by power supply circuit cuts off fault, the full institute's dead electricity of electric substation is will result in, as Fig. 5 institute together in fault, relay protection action
Show：
(1) when the method for operation be one UL1 of power supply, two UL2 of the power supply female power supply of, II female to I respectively, segmentation 3DL switch is standby,
When automatic switching device of standby power supply hauls oneself willingly into mode for segmentation：I is female to there is permanent fault, and 1 side 11DL of power supply switch relay protection is moved
Make, tripping 11DL, overlap and do not become tripping 11DL again；I mother decompression and 1DL switch nothing stream, meet automatic switching device of standby power supply and rise
Dynamic condition, automatic switching device of standby power supply action, 1DL is jumped, closes 3DL.Now 2 side 21DL of power supply switch protective relaying device is experienced
To fault, tripping 21DL after action, the full institute's dead electricity of the electric substation.
(2) when the method for operation be power supply 1, the female power supply of, II female to I respectively of power supply 2, segmentation 3DL switchs standby, stand-by power supply
When automatic bus haul oneself willingly into mode for segmentation：II is female to there is permanent fault, and 2 side 21DL of power supply switchs relay protection action, tripping
21DL, overlaps and does not become tripping 21DL again；II mother decompression and 2DL switch nothing stream, meet automatic switching device of standby power supply starting conditions,
Automatic switching device of standby power supply action, jumps 2DL, closes 3DL.Now 1 side 11DL of power supply switch protective relaying device experiences fault,
Tripping 11DL after action, the full institute's dead electricity of the electric substation.
(3) when the method for operation for power supply 1 to the female power supply of I, and through 3DL switch to the female power supply of II, 2DL switchs stand-by heat, electricity
The empty line charging in 2 pairs, source, when automatic switching device of standby power supply hauls oneself willingly into mode for inlet wire N：I is female to there is permanent fault, 1 side of power supply
11DL switchs relay protection action, and tripping 11DL, coincidence do not become tripping 11DL again；I is female, the female all decompressions of II and 1DL are switched no
Stream, meets automatic switching device of standby power supply starting conditions, automatic switching device of standby power supply action, jump 1DL, conjunction 2DL.Now 2 side of power supply
21DL switch protective relaying device experiences fault, tripping 21DL after action, the full institute's dead electricity of the electric substation.
(4) when the method for operation for power supply 1 to the female power supply of I, and through 3DL switch to the female power supply of II, 2DL switchs stand-by heat, electricity
The empty line charging in 2 pairs, source, when automatic switching device of standby power supply hauls oneself willingly into mode for inlet wire N：II is female to there is permanent fault, due to
110kV circuit relay protection is typically adjusted for circuit principle by terminal feedback, i.e. quick-action section saves line sensitivity from damage, and block switch
3DL typically configures charge protection, and automatically open in short-term only when switch is changed into closing position from point position (electric current of 3DL switchgear distribution is protected
Shield, must ensure that under little mode bus-bar fault has enough sensitivity, often can not escape transformer excitation flow, or hide not in definite value
Step down side fault under excessive mode, should not be put into for a long time), fault is still cut off by mains side 11DL switch, and I is female, II is female
Equal decompressions and 1DL is switched nothing stream, meets automatic switching device of standby power supply starting conditions, and 1DL is jumped in automatic switching device of standby power supply action,
Close 2DL.Now 2 side 21DL of power supply switch protective relaying device experiences fault, tripping 21DL after action, full institute of the electric substation
Dead electricity.
(5) when the method for operation for power supply 2 to the female power supply of I, and through 3DL switch to the female power supply of I, 1DL switchs stand-by heat, power supply
1 pair of empty line charging, when automatic switching device of standby power supply hauls oneself willingly into mode for inlet wire M, as described in (3), (4) in background above technology.
According to above analysis, when traditional automatic switching device of standby power supply is applied to 110kV single-trunk segmental wiring electric substation,
There is 110kV bus-bar fault, automatic closing device action causes asking for full institute's dead electricity together in fault bus after bus loss of pressure
Topic.《10kV～110 (66) kV route protection and servicing unit standardized designs specification》(Q/GDW766 2012) is proposed
" 7.2.9 backup auto-activating device preferably has power supply to throw automatically the safeguard measure in fault bus or faulty equipment." for traditional transformer station,
As automatic switching device of standby power supply analog quantity is opened limited into passage, 1DL, 2DL switch generally individually only introduces a phase current, makees have stream
Locking differentiates to be used, it is impossible to differentiate bus-bar fault, device does not possess yet throws the function of taking safeguard measure after fault bus.
Content of the invention
The present invention is directed to problem above, there is provided a kind of safe, automatic discrimination bus-bar fault, and according to trouble point position
Put the corresponding action policy of execution, isolated fault, the automatic switching device of standby power supply system for restoring electricity haul oneself willingly into method.
The technical scheme is that：Merge including inlet wire M, inlet wire N, bus, automatic switching device of standby power supply and segmentation single
Unit, the inlet wire M and inlet wire N connect the bus respectively, and the bus connects the segmentation combining unit；
The inlet wire M includes power circuit one, one PT1 of circuit buckling, one CT1 of current transformer, breaker one 1DL and 1
Number inlet wire combining unit, one PT1 of circuit buckling, the other end are accessed in one end of the power circuit one, and to access the electric current mutual
One CT1 of sensor, one 1DL of the breaker access one CT1 of current transformer, one PT1 of circuit buckling and Current Mutual Inductance
One CT1 of device is respectively connected to No. 1 inlet wire combining unit；
The inlet wire N includes power circuit two, two PT2 of circuit buckling, two CT2 of current transformer, breaker two 2DL and 2
Number inlet wire combining unit, two PT2 of circuit buckling, the other end are accessed in one end of the power circuit two, and to access the electric current mutual
Two CT2 of sensor, the breaker 2DL access two CT2 of current transformer, two PT2 summation current transformer of the circuit buckling
Two CT2 are respectively connected to No. 2 inlet wire combining units；
The bus include bus I mother, bus II mother, one I of bus voltage transformer mother PT, three 3DL of breaker, mother rheology CT3,
Two II of bus voltage transformer mother's PT and 110KV voltage combining unit, the female one end of the bus I connect one 1DL of breaker, another
The female one end of end connection three 3DL of breaker, the bus II connects two 2DL of breaker, the other end and connects the mother
Connection rheology CT3, three 3DL of the breaker are connected with mother rheology CT3, one I of bus voltage transformer mother PT, bus voltage transformer two
II mother PT and mother rheology CT3 are incorporated to the 110KV voltage combining unit；
The 110KV voltage combining unit connects No. 1 inlet wire combining unit and No. 2 inlet wire combining units, institute respectively
State No. 1 inlet wire combining unit and No. 2 inlet wire combining units are all connected with the automatic switching device of standby power supply；
The segmentation combining unit connects collection plate, the collection plate connection protection board and management board.
A kind of automatic switching device of standby power supply system haul oneself willingly into method,
1), the method for operation that inlet wire prepared auto restart LBZT1 is suitable for is：Inlet wire M is standby, inlet wire N runs, block switch operation：
When A, bus loss of pressure, CT2 non-faulty current, trouble point is not on bus：
A1), I is female, II mother all has pressure nothing pressure, UL1 and IL2 is nothing stream, and UL1 is the voltage of power circuit one, and IL2 is breaker
The electric current of two 2DL, time delay jump 2DL, and device is simultaneously emitted by " LBZT1 jumps 2DL action " signal；
A2, after), confirming 2DL tripping, 2DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut and make
The miscellaneous equipment time limit is cut after power supply, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, be simultaneously emitted by that " it is female that LBZT1 connection cuts I/II
Device action " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s, prepared auto restart judges that being joined the equipment cut jumps
Open, that is, withdraw and jump miscellaneous equipment order；1DL closing pulse is sent out through time delay again, and send " LBZT1 closes 1DL action " signal；
A3, after), confirming that 1DL closes, device sends " inlet wire M bright standby " signal；If accelerated motion, then send out that " inlet wire M is bright
Standby acceleration " signal, LBZT1 logic are completed；
A4 after), 2DL trips, cuts miscellaneous equipment, 1DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1
Logic, LBZT are discharged, and device sends " prepared auto restart failure " signal；
When B, bus loss of pressure, the faulty electric current of CT2 and trouble point is on bus, after 3DL tripping operation, 2DL is broken down electricity again
Stream, trouble point is between II female or 2DL switch and rheology：
After LBZT1 charging complete：
B1), I, II are female has pressure and the faulty electric current of IL2, no No. 1 main transformer or No. 2 main transformer protection actuating signals nothing pressure, UL1
Open into then through time delay 3DL, device is simultaneously emitted by " LBZT jumps 3DL " signal；
B2, after), confirming 3DL tripping, 3DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut and make
The miscellaneous equipment time limit is cut after power supply, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, be simultaneously emitted by that " it is female that LBZT1 connection cuts I/II
Device action " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s, prepared auto restart judges that being joined the equipment cut jumps
Open, that is, withdraw and jump miscellaneous equipment order；
B3) if, IL2 is broken down electric current again in the time delay, send out jump 2DL pulse, and send " LBZT1 jumps 2DL action "
Signal；
B4, after), confirming 2DL tripping, device closes 1DL and 3DL command signal；And send " LBZT1 closes 2DL, 3DL action " letter
Number, after confirming that 1DL, 3DL close, LBZT1 logic is completed；
B5 after), 3DL trips, cuts miscellaneous equipment, 2DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1
Logic, LBZT are discharged, and device sends " prepared auto restart failure " signal；
When C, bus loss of pressure, the faulty electric current of CT2 and trouble point is on bus, 2DL non-fault electricity always after 3DL tripping operation
Stream, trouble point is in the female or transient fault for having disappeared of I：
After LBZT1 charging complete：
C1), I, II are female has pressure and the faulty stream of IL2, no No. 1 main transformer or No. 2 main transformer protection actuating signals to open nothing pressure, UL1
Enter, then through time delay 3DL, device is simultaneously emitted by " LBZT jumps 3DL " signal；
C2, after), confirming 3DL tripping, 3DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut and make
The miscellaneous equipment time limit is cut after power supply, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, be simultaneously emitted by that " it is female that LBZT1 connection cuts I/II
Device action " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s, prepared auto restart judges that being joined the equipment cut jumps
Open, that is, withdraw and jump miscellaneous equipment order；
C3) if, IL2, always nothing stream, sends out conjunction 1DL pulse, and sends " LBZT1 closes 1DL action " signal in the time delay；
C4, after), confirming that 1DL closes, LBZT1 logic is completed；
C5 after), 3DL trips, cuts miscellaneous equipment, 1DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1
Logic, LBZT are discharged, and device sends " prepared auto restart failure " signal；
2), the method for operation that segmentation prepared auto restart FBZT is suitable for is：Inlet wire M runs, and inlet wire N runs, and block switch is standby,
FBZT2 is II mother's dark standby, and course of action is as follows：
After D, I mother's decompression, 1DL and 2DL does not all flow through fault current, and trouble point is not on bus：
After FBZT charging complete：
D1), I mother has pressure nothing pressure, mother II and IL1 is nothing stream, and IL1 is the electric current of one 1DL of breaker, if closing contact to start definite value
Put into, also need to sentence 1DL jump position, 1DL trip signal is sent out in time delay, while sending out " FBZT2 jumps 1DL action " signal；
D2, after), confirming 1DL tripping, 1DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut and make
The miscellaneous equipment time limit is cut after power supply, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, while sending out, " I mother's equipment cut by FBZT2 connection
Action " signal, then checks the whether tripping of the equipment cut of connection, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, i.e.,
Withdraw and jump miscellaneous equipment order；3DL closing pulse is sent out again through time delay, concurrent " FBZT closes 3DL action " signal；
D3 " II mother's dark standby " signal, after), confirming that 3DL closes, is sent out, and FBZT2 logic is completed；
D4), 1DL tripping operation, cut after miscellaneous equipment, 3DL combined floodgate order send 5s, breaker is still not operating, then terminate FBZT2
Logic, FBZT are discharged, and device sends " prepared auto restart failure " signal；
After E, I mother's decompression, 1DL flows through fault current, and 2DL does not flow through fault current, trouble point I female or 1DL switch with
Between rheology：
After FBZT charging complete：
E1), I is female has pressure and the faulty electric current of IL1 nothing pressure, mother II, and no No. 1 main transformer actuating signal is opened into if close contact opening
Dynamic definite value puts into, and also needs to sentence 1DL jump position, and 1DL trip signal is sent out in time delay, while sending out " FBZT2 jumps 1DL action " signal；
E2, after), confirming 1DL tripping, 1DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut and make
The miscellaneous equipment time limit is cut after power supply, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, while sending out, " I mother's equipment cut by FBZT2 connection
Action " signal, then checks the whether tripping of the equipment cut of connection, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, i.e.,
Withdraw and jump miscellaneous equipment order；3DL closing pulse is sent out again through time delay, concurrent " FBZT closes 3DL action " signal；
E3 " II mother's dark standby " signal, after), confirming that 3DL closes, is sent out；
E3-1), FBZT2 logic is completed；
E3-2), accelerate motion, " II mother's dark standby accelerates " signal is sent out, FBZT2 logic is completed；
E4), 1DL tripping operation, cut after miscellaneous equipment, 3DL combined floodgate order send 5s, breaker is still not operating, then terminate FBZT2
Logic, FBZT are discharged, and device sends " prepared auto restart failure " signal.
For Intelligent transformer station, often the three-phase current back into line even includes voltage to the present invention, the three of block switch
Phase current amount, all can be changed into a road optical signal transmission to automatic switching device of standby power supply by combining unit, solve simulation
Input limited problem is measured, simulation measure feature during such that it is able to occurring according to fault is positioned to trouble point, and is taken
Measure, locking automatic switching device of standby power supply accelerates isolated fault, and the final security for improving equipment can restore electricity.
Description of the drawings
Fig. 1 is the flow chart of the present invention,
Fig. 2 is the circuit diagram of the present invention,
Fig. 3 is inlet wire prepared auto restart logic diagram of the present invention,
Fig. 4 is bus prepared auto restart logic diagram of the present invention,
Fig. 5 is circuit diagram in background of invention；
Specific embodiment
The present invention as Figure 1-4, merges including inlet wire M, inlet wire N, bus, automatic switching device of standby power supply and segmentation single
Unit, the inlet wire M and inlet wire N connect the bus respectively, and the bus connects the segmentation combining unit；
The inlet wire M includes power circuit one, one PT1 of circuit buckling, one CT1 of current transformer, breaker one 1DL and 1
Number inlet wire combining unit, one PT1 of circuit buckling, the other end are accessed in one end of the power circuit one, and to access the electric current mutual
One CT1 of sensor, one 1DL of the breaker access one CT1 of current transformer, one PT1 of circuit buckling and Current Mutual Inductance
One CT1 of device is respectively connected to No. 1 inlet wire combining unit；
The inlet wire N includes power circuit two, two PT2 of circuit buckling, two CT2 of current transformer, breaker two 2DL and 2
Number inlet wire combining unit, two PT2 of circuit buckling, the other end are accessed in one end of the power circuit two, and to access the electric current mutual
Two CT2 of sensor, the breaker 2DL access two CT2 of current transformer, two PT2 summation current transformer of the circuit buckling
Two CT2 are respectively connected to No. 2 inlet wire combining units；
The bus include bus I mother, bus II mother, one I of bus voltage transformer mother PT, three 3DL of breaker, mother rheology CT3,
Two II of bus voltage transformer mother's PT and 110KV voltage combining unit, the female one end of the bus I connect one 1DL of breaker, another
The female one end of end connection three 3DL of breaker, the bus II connects two 2DL of breaker, the other end and connects the mother
Connection rheology CT3, three 3DL of the breaker are connected with mother rheology CT3, one I of bus voltage transformer mother PT, bus voltage transformer two
II mother PT and mother rheology CT3 are incorporated to the 110KV voltage combining unit；
The 110KV voltage combining unit connects No. 1 inlet wire combining unit and No. 2 inlet wire combining units, institute respectively
State No. 1 inlet wire combining unit and No. 2 inlet wire combining units are all connected with the automatic switching device of standby power supply；
By the electric current of inlet wire M and voltage are accessed No. 1 inlet wire combining unit, the electric current of inlet wire N and voltage access No. 2 and enter
Line combining unit, the electric current of bus and voltage access 110KV voltage combining unit, and analog quantity is converted into digital quantity connects respectively
Enter No. 1 inlet wire combining unit and No. 2 inlet wire combining units, then by No. 1 inlet wire combining unit and No. 2 inlet wire combining units by signal
Give automatic switching device of standby power supply.
The segmentation combining unit connects collection plate, the collection plate connection protection board and management board, by circuit and point
Section combining unit sends SV data to the collection plate of PRS-7358 device, is completed collection and the meter of of ac by the collection plate
Calculate, send data to the protection board and management board.
The collection plate adopts WB8290 model.
A kind of automatic switching device of standby power supply system to haul oneself willingly into method as follows：
(1), the method for operation that inlet wire prepared auto restart LBZT1 is suitable for is：Inlet wire M is standby, inlet wire N runs, block switch operation：
When A, bus loss of pressure, CT2 non-faulty current, trouble point is not on bus：
(A1), I is female, II mother all has pressure (nothing condition when sentencing inlet wire and having pressure definite value to exit) nothing pressure, UL1 and IL2 is nothing stream,
UL1 is the voltage of power circuit one, and IL2 is the electric current of two 2DL of breaker, (when contact startup definite value input is closed, also needs to sentence
2DL jumps position), 2DL is jumped in time delay (opening into then without time delay if any BZT is accelerated), and device is simultaneously emitted by " LBZT1 jumps 2DL action " letter
Number；
(A2), after, confirming 2DL tripping, 2DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut
The miscellaneous equipment time limit is cut after making power supply, and after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment (such as small power supply interconnection or ground connection change etc.)
Order, is simultaneously emitted by " I/II female device action cut by LBZT1 connection " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s
Interior, prepared auto restart is judged to be joined the equipment tripping cut, that is, withdraw and jump miscellaneous equipment order；1DL closing pulse is sent out again through time delay, and
Send " LBZT1 closes 1DL action " signal；
(A3), after, confirming that 1DL closes, device sends " inlet wire M bright standby " signal；If accelerated motion, then send out " inlet wire M
Bright standby acceleration " signal, LBZT1 logic are completed；
(A4) after, 2DL trips, cuts miscellaneous equipment, 1DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1
Logic, LBZT are discharged, and device sends " prepared auto restart failure " signal.
When B, bus loss of pressure, the faulty electric current of CT2 and trouble point is on bus, after 3DL tripping operation, 2DL is broken down electricity again
Stream, trouble point is between II female or 2DL switch and rheology：
After LBZT1 charging complete：
(B1), I, II are female has pressure (nothing condition when sentencing inlet wire and having pressure definite value to exit) and the faulty electricity of IL2 nothing pressure, UL1
Stream, no No. 1 main transformer or No. 2 main transformer protection actuating signals open into, (when closing contact and starting definite value and put into, also needing to sentence jump position), then
Through time delay (opening into then without time delay if any BZT is accelerated) 3DL (note：The time delay should be less than 21DL reclosing actuation time), device
It is simultaneously emitted by " LBZT jumps 3DL " signal；
(B2), after, confirming 3DL tripping, 3DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut
The miscellaneous equipment time limit is cut after making power supply, and after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment (such as small power supply interconnection or ground connection change etc.)
Order, is simultaneously emitted by " I/II female device action cut by LBZT1 connection " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s
Interior, prepared auto restart is judged to be joined the equipment tripping cut, that is, withdraw and jump miscellaneous equipment order；
(B3) if, IL2 is broken down electric current (note again in the time delay：The time delay should be greater than 21DL reclosing actuation time),
Jump 2DL pulse is then sent out, and sends " LBZT1 jumps 2DL action " signal；(after offside reclosing, IL2 has stream again, illustrates fault
, for failing isolated fault after permanent fault, and 3DL tripping, now the possible position in trouble point should be in II female or 2DL switch for matter
Between rheology；)
(B4), after, confirming 2DL tripping, device closes 1DL and 3DL command signal；And send " LBZT1 closes 2DL, 3DL action "
Signal, after confirming that 1DL, 3DL close, LBZT1 logic is completed；(note：As trouble point is switched and rheology between in 2DL, 2DL tripping
Can isolated fault, 1DL, 3DL recover the power supply to two sections of buses after closing；As trouble point is female in II, 1DL, 3DL close after meeting
Perceive fault current immediately, now by 1DL switch over-current protection accelerated motion jump 3DL, 1 line mains side 11DL switch due to
Also perceiving fault current may be while action, remedies by reclosing, and finally electric substation's mode is that 1 line is female for I, the female fault of II
Dead electricity.The reason for can not being accelerated motion by the protection of 3DL switch over-current is that trouble point is located at 3DL mistake when between 3DL switch and rheology
Stream protection is unable to correct operation；)
(B5) after, 3DL trips, cuts miscellaneous equipment, 2DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1
Logic, LBZT are discharged, and device sends " prepared auto restart failure " signal.
When C, bus loss of pressure, the faulty electric current of CT2 and trouble point is on bus, 2DL non-fault electricity always after 3DL tripping operation
Stream, trouble point is in the female or transient fault for having disappeared of I：
After LBZT1 charging complete：
(C1), I, II are female has pressure (nothing condition when sentencing inlet wire and having pressure definite value to exit) and the faulty stream of IL2 nothing pressure, UL1,
No No. 1 main transformer or No. 2 main transformer protection actuating signals are opened into (when contact startup definite value input is closed, also needing to sentence jump position), then through prolonging
When (if any accelerate BZT open into then without time delay) 3DL (note：The time delay should be less than 21DL reclosing actuation time), device is simultaneously
Send " LBZT jumps 3DL " signal；
(C2), after, confirming 3DL tripping, 3DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut
The miscellaneous equipment time limit is cut after making power supply, and after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment (such as small power supply interconnection or ground connection change etc.)
Order, is simultaneously emitted by " I/II female device action cut by LBZT1 connection " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s
Interior, prepared auto restart is judged to be joined the equipment tripping cut, that is, withdraw and jump miscellaneous equipment order；
(C3), in time delay, (time delay is more than 21DL reclosing actuation time), if IL2 is always nothing stream, sends out conjunction 1DL arteries and veins
Punching, and send " LBZT1 closes 1DL action " signal；(always nothing stream, 2DL rheology illustrates that fault is that transient fault and trouble point disappear
Lose；Or trouble point is female in I, is isolated by 3DL.If the transient fault for having disappeared, electric substation's method of operation after the 1DL that closes
Confession presented for 2 respectively back into line, two sections of buses all not dead electricity；If fault is still put in I mother, cut off by 1 line source-side switches 11DL
Fault, electric substation's mode are changed into 2 lines for II mother, I mother's fault dead electricity；)
(C4), after, confirming that 1DL closes, LBZT1 logic is completed；
(C5) after, 3DL trips, cuts miscellaneous equipment, 1DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1
Logic, LBZT are discharged, and device sends " prepared auto restart failure " signal.
Inlet wire prepared auto restart LBZT2 be suitable for the method for operation be：Inlet wire N is standby, inlet wire M runs, block switch operation, principle
With the method for operation that LBZT1 is suitable for.
(2), the method for operation that segmentation prepared auto restart FBZT is suitable for is：Inlet wire M runs, and inlet wire N runs, and block switch is standby,
FBZT2 is II mother's dark standby, and course of action is as follows：
After D, I mother's decompression, 1DL and 2DL does not all flow through fault current, and trouble point is not on bus：
After FBZT charging complete：
(D1), I mother has pressure nothing pressure, mother II and IL1 is nothing stream, and IL1 is the electric current of one 1DL of breaker, determines if closing contact and starting
Value puts into, and also needs to sentence 1DL jump position, and 1DL trip signal is sent out in time delay, while sending out " FBZT2 jumps 1DL action " signal；
(D2), after, confirming 1DL tripping, 1DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut
The miscellaneous equipment time limit is cut after making power supply, and after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment (such as small power supply interconnection or ground connection change etc.)
Order, while send out " I mother's device action cut by FBZT2 connection " signal, then checks the whether tripping of the equipment cut of connection, if in 5s, standby
Haul oneself willingly into and judge to be joined the equipment tripping cut, that is, withdraw and jump miscellaneous equipment order；3DL closing pulse is sent out again through time delay, concurrently
" FBZT closes 3DL action " signal；
(D3) " II mother's dark standby " signal, after, confirming that 3DL closes, is sent out, and FBZT2 logic is completed；
(D4), 1DL tripping operation, cut after miscellaneous equipment, 3DL combined floodgate order send 5s, breaker is still not operating, then terminate
FBZT2 logic, FBZT are discharged, and device sends " prepared auto restart failure " signal.
After E, I mother's decompression, 1DL flows through fault current, and 2DL does not flow through fault current, trouble point I female or 1DL switch with
Between rheology：
After FBZT charging complete：
(E1), I is female has pressure and the faulty electric current of IL1 nothing pressure, mother II, and no No. 1 main transformer actuating signal is opened into if close contact opening
Dynamic definite value puts into, and also needs to sentence 1DL jump position, and 1DL trip signal (time delay is hided circuit offside reclosing actuation time) is sent out in time delay, with
When send out " FBZT2 jump 1DL action " signal；
(E2), after, confirming 1DL tripping, 1DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start cut
The miscellaneous equipment time limit is cut after making power supply, and after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment (such as small power supply interconnection or ground connection change etc.)
Order, while send out " I mother's device action cut by FBZT2 connection " signal, then checks the whether tripping of the equipment cut of connection, if in 5s, standby
Haul oneself willingly into and judge to be joined the equipment tripping cut, that is, withdraw and jump miscellaneous equipment order；3DL closing pulse is sent out again through time delay, concurrently
" FBZT closes 3DL action " signal；
(E3) " II mother's dark standby " signal, after, confirming that 3DL closes, is sent out；
(E3-1), FBZT2 logic is completed；(note：Trouble point is switched and rheology between in 1DL, the power transformation after prepared auto restart action
It is female for I, II that institute's method of operation is changed into 2 lines)
(E3-2), accelerate motion, " II mother's dark standby accelerates " signal is sent out, FBZT2 logic is completed；(note：Trouble point is female in I,
3DL jumps 3DL switch, the operation side of electric substation with 3DL switch changed position information opening 2DL switch over-current protection accelerated motion after closing
Formula is changed into 2 lines for II mother, I mother's fault dead electricity)
(E4), 1DL tripping operation, cut after miscellaneous equipment, 3DL combined floodgate order send 5s, breaker is still not operating, then terminate
FBZT2 logic, FBZT are discharged, and device sends " prepared auto restart failure " signal.
Claims (1)
1. a kind of automatic switching device of standby power supply system haul oneself willingly into method, the automatic switching device of standby power supply system includes inlet wire M, enters
Line N, bus, automatic switching device of standby power supply and segmentation combining unit, the inlet wire M and inlet wire N connect the bus respectively, described
Bus connects the segmentation combining unit；
The inlet wire M includes that power circuit one, one PT1 of circuit buckling, one CT1 of current transformer, breaker one 1DL and 1 enter
Line combining unit, one end of the power circuit one access one PT1 of circuit buckling, the other end and access the current transformer
One CT1, one 1DL of the breaker access one CT1 of current transformer, one PT1 summation current transformer one of the circuit buckling
CT1 is respectively connected to No. 1 inlet wire combining unit；
The inlet wire N includes that power circuit two, two PT2 of circuit buckling, two CT2 of current transformer, breaker two 2DL and 2 enter
Line combining unit, one end of the power circuit two access two PT2 of circuit buckling, the other end and access the current transformer
Two CT2, the breaker 2DL access two CT2 of current transformer, two PT2 summation current transformer of circuit buckling, two CT2
It is respectively connected to No. 2 inlet wire combining units；
The bus includes bus I mother, bus II mother, one I of bus voltage transformer mother PT, three 3DL of breaker, mother rheology CT3, bus
Two II of buckling mother's PT and 110KV voltage combining unit, the female one end of the bus I connect one 1DL of breaker, the other end and connect
Connect the female one end of three 3DL of the breaker, the bus II and connect two 2DL of breaker, the other end connection mother stream
Become CT3, three 3DL of the breaker to be connected with mother rheology CT3, one I of bus voltage transformer mother PT, two II of bus voltage transformer are female
PT and mother rheology CT3 are incorporated to the 110KV voltage combining unit；
The 110KV voltage combining unit connects No. 1 inlet wire combining unit and No. 2 inlet wire combining units respectively, described No. 1
Inlet wire combining unit and No. 2 inlet wire combining units are all connected with the automatic switching device of standby power supply；
The segmentation combining unit connects collection plate, the collection plate connection protection board and management board；
Characterized in that,
1), the method for operation that inlet wire prepared auto restart LBZT1 is suitable for is：Inlet wire M is standby, inlet wire N runs, block switch operation：
When A, bus loss of pressure, CT2 non-faulty current, trouble point is not on bus：
A1), I is female, II mother all has pressure nothing pressure, UL1 and IL2 is nothing stream, and UL1 is the voltage of power circuit one, and IL2 is breaker two
The electric current of 2DL, time delay jump 2DL, and device is simultaneously emitted by " LBZT1 jumps 2DL action " signal；
A2, after), confirming 2DL tripping, 2DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start and cut working power
After cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, is simultaneously emitted by that " I/II female equipment cut by LBZT1 connection
Action " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, i.e.,
Withdraw and jump miscellaneous equipment order；1DL closing pulse is sent out through time delay again, and send " LBZT1 closes 1DL action " signal；
A3, after), confirming that 1DL closes, device sends " inlet wire M bright standby " signal；If accelerated motion, then send out " inlet wire M bright standby
Acceleration " signal, LBZT1 logic are completed；
A4 after), 2DL trips, cuts miscellaneous equipment, 1DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1 logic,
LBZT discharges, and device sends " prepared auto restart failure " signal；
When B, bus loss of pressure, the faulty electric current of CT2 and trouble point is on bus, after 3DL tripping operation, 2DL is broken down electric current again, therefore
Barrier point is between II female or 2DL switch and rheology：
After LBZT1 charging complete：
B1), I, II are female has a pressure and the faulty electric current of IL2 nothing pressure, UL1, no No. 1 main transformer or No. 2 main transformer protection actuating signals open into,
Then 3DL is jumped through time delay, device is simultaneously emitted by " LBZT jumps 3DL " signal；
B2, after), confirming 3DL tripping, 3DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start and cut working power
After cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, is simultaneously emitted by that " I/II female equipment cut by LBZT1 connection
Action " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, i.e.,
Withdraw and jump miscellaneous equipment order；
B3) if, IL2 is broken down electric current again in the time delay, send out jump 2DL pulse, and send " LBZT1 jumps 2DL action " signal；
B4, after), confirming 2DL tripping, device closes 1DL and 3DL command signal；And " LBZT1 closes 2DL, 3DL action " signal is sent,
After confirming that 1DL, 3DL close, LBZT1 logic is completed；
B5 after), 3DL trips, cuts miscellaneous equipment, 2DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1 logic,
LBZT discharges, and device sends " prepared auto restart failure " signal；
When C, bus loss of pressure, the faulty electric current of CT2 and trouble point is on bus, 2DL non-fault current always after 3DL tripping operation, therefore
Barrier point is in the female or transient fault for having disappeared of I：
After LBZT1 charging complete：
C1), I, II are female has pressure and the faulty stream of IL2, no No. 1 main transformer or No. 2 main transformer protection actuating signals to open into then nothing pressure, UL1
Through time delay 3DL, device is simultaneously emitted by " LBZT jumps 3DL " signal；
C2, after), confirming 3DL tripping, 3DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start and cut working power
After cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, is simultaneously emitted by that " I/II female equipment cut by LBZT1 connection
Action " signal；Then the whether tripping of the equipment cut of connection is checked, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, i.e.,
Withdraw and jump miscellaneous equipment order；
C3) if, IL2, always nothing stream, sends out conjunction 1DL pulse, and sends " LBZT1 closes 1DL action " signal in the time delay；
C4, after), confirming that 1DL closes, LBZT1 logic is completed；
C5 after), 3DL trips, cuts miscellaneous equipment, 1DL combined floodgate order occurs 5s, breaker is still not operating, then terminate LBZT1 logic,
LBZT discharges, and device sends " prepared auto restart failure " signal；
2), the method for operation that segmentation prepared auto restart FBZT is suitable for is：Inlet wire M runs, and inlet wire N runs, and block switch is standby, FBZT2
For II mother's dark standby, course of action is as follows：
After D, I mother's decompression, 1DL and 2DL does not all flow through fault current, and trouble point is not on bus：
After FBZT charging complete：
D1), I mother has pressure nothing pressure, mother II and IL1 is nothing stream, and IL1 is the electric current of one 1DL of breaker, throws if closing contact and starting definite value
Enter, also need to sentence 1DL jump position, 1DL trip signal is sent out in time delay, while sending out " FBZT2 jumps 1DL action " signal；
D2, after), confirming 1DL tripping, 1DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start and cut working power
After cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, at the same send out " FBZT2 connection cut I mother device action "
Signal, then checks the whether tripping of the equipment cut of connection, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, that is, withdraw
Jump miscellaneous equipment order；3DL closing pulse is sent out again through time delay, concurrent " FBZT closes 3DL action " signal；
D3 " II mother's dark standby " signal, after), confirming that 3DL closes, is sent out, and FBZT2 logic is completed；
D4), 1DL tripping operation, cut after miscellaneous equipment, 3DL combined floodgate order send 5s, breaker is still not operating, then terminate FBZT2 and patrol
Volume, FBZT discharges, and device sends " prepared auto restart failure " signal；
After E, I mother's decompression, 1DL flows through fault current, and 2DL does not flow through fault current, and trouble point is in I female or 1DL switch and rheology
Between：
After FBZT charging complete：
E1), I is female has pressure and the faulty electric current of IL1 nothing pressure, mother II, and no No. 1 main transformer actuating signal is opened into if it is fixed to close contact startup
Value puts into, and also needs to sentence 1DL jump position, and 1DL trip signal is sent out in time delay, while sending out " FBZT2 jumps 1DL action " signal；
E2, after), confirming 1DL tripping, 1DL trip signal is withdrawn；If miscellaneous equipment definite value input is cut, then start and cut working power
After cut the miscellaneous equipment time limit, after time delay is arrived, prepared auto restart is sent out and cuts miscellaneous equipment order, at the same send out " FBZT2 connection cut I mother device action "
Signal, then checks the whether tripping of the equipment cut of connection, if in 5s, prepared auto restart is judged to be joined the equipment tripping cut, that is, withdraw
Jump miscellaneous equipment order；3DL closing pulse is sent out again through time delay, concurrent " FBZT closes 3DL action " signal；
E3 " II mother's dark standby " signal, after), confirming that 3DL closes, is sent out；
E3-1), FBZT2 logic is completed；
E3-2), accelerate motion, " II mother's dark standby accelerates " signal is sent out, FBZT2 logic is completed；
E4), 1DL tripping operation, cut after miscellaneous equipment, 3DL combined floodgate order send 5s, breaker is still not operating, then terminate FBZT2 and patrol
Volume, FBZT discharges, and device sends " prepared auto restart failure " signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765468.XA CN104539043B (en) | 2015-01-22 | 2015-01-22 | A kind of automatic switching device of standby power supply system haul oneself willingly into method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765468.XA CN104539043B (en) | 2015-01-22 | 2015-01-22 | A kind of automatic switching device of standby power supply system haul oneself willingly into method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104539043A CN104539043A (en) | 2015-04-22 |
| CN104539043B true CN104539043B (en) | 2017-03-08 |
Family
ID=52854533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410765468.XA Active CN104539043B (en) | 2015-01-22 | 2015-01-22 | A kind of automatic switching device of standby power supply system haul oneself willingly into method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104539043B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821655B (en) * | 2015-05-14 | 2017-03-29 | 南京南瑞继保电气有限公司 | A kind of Fault Locating Method of region prepared auto restart |
| CN105391165A (en) * | 2015-12-29 | 2016-03-09 | 国家电网公司 | Inlet wire emergency power supply automatic switch-in control method and system |
| CN108345706B (en) * | 2017-01-24 | 2021-10-08 | 中国石油化工股份有限公司 | Power supply fast switching simulation method and model |
| CN107492947A (en) * | 2017-07-26 | 2017-12-19 | 国网山东省电力公司日照供电公司 | A kind of dual transformer control method and system |
| CN107947351A (en) * | 2017-12-26 | 2018-04-20 | 江西清华泰豪三波电机有限公司 | A kind of power supply unit and system |
| CN108051706B (en) * | 2017-12-28 | 2020-09-01 | 长园深瑞继保自动化有限公司 | Fault identification method and system for automatic standby power supply switching device |
| CN109787347B (en) * | 2019-01-02 | 2022-06-24 | 中国船舶重工集团公司第七一九研究所 | Dual-power switching device for restraining transformer excitation inrush current and switching method thereof |
| CN110174560B (en) * | 2019-04-04 | 2021-04-16 | 河北电力装备有限公司 | Relay protection device state variable testing method |
| CN109831024A (en) * | 2019-04-11 | 2019-05-31 | 国网江苏省电力有限公司镇江供电分公司 | Joint in-put of spare power supply method based on stand-by heat route |
| CN109861224B (en) * | 2019-04-11 | 2021-04-13 | 国网江苏省电力有限公司镇江供电分公司 | Hot standby circuit combined standby power supply switching method based on optical fiber channel |
| CN109861225B (en) * | 2019-04-11 | 2021-04-27 | 国网江苏省电力有限公司镇江供电分公司 | Hot standby circuit standby power supply switching method based on optical fiber channel |
| CN112186883B (en) * | 2020-10-09 | 2022-07-29 | 国网江苏省电力有限公司淮安供电分公司 | Spare power automatic switching method for electric power safety |
| CN112582989B (en) * | 2020-12-16 | 2023-02-10 | 广东电网有限责任公司 | Power system for preventing backup power automatic switching on and switching off of fault bus and control method thereof |
| CN113690858B (en) * | 2021-07-23 | 2024-08-06 | 国网浙江省电力有限公司宁波供电公司 | Quick switch control protection system based on current limiting device |
| CN113708370A (en) * | 2021-08-31 | 2021-11-26 | 许昌智能继电器股份有限公司 | Automatic switching method and system for standby power supply |
| CN114336947A (en) * | 2022-01-04 | 2022-04-12 | 中国电建集团成都勘测设计研究院有限公司 | Automatic standby power supply switching system and method |
| CN116780747B (en) * | 2023-07-04 | 2024-06-14 | 国网江苏省电力有限公司宿迁供电分公司 | Method for improving action accuracy rate during disconnection of sectional spare power automatic switching voltage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459350A (en) * | 2008-05-19 | 2009-06-17 | 河南省电力公司 | GOOSE mode network standby dispensing method based on digital transmission network |
| CN102710008A (en) * | 2012-03-08 | 2012-10-03 | 华南理工大学 | Three-bus four-section standby power automatic operation device self-adaption in service and out of service control method |
| CN103595120A (en) * | 2013-11-21 | 2014-02-19 | 长园深瑞继保自动化有限公司 | Multi-incoming-line standby power supply automatic switching-in method |
| EP2765679A1 (en) * | 2013-02-06 | 2014-08-13 | ABB Technology AG | Intelligent electrical power network device |
| CN204271745U (en) * | 2015-01-22 | 2015-04-15 | 江苏省电力公司扬州供电公司 | Automatic switching device of standby power supply system |
-
2015
- 2015-01-22 CN CN201410765468.XA patent/CN104539043B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459350A (en) * | 2008-05-19 | 2009-06-17 | 河南省电力公司 | GOOSE mode network standby dispensing method based on digital transmission network |
| CN102710008A (en) * | 2012-03-08 | 2012-10-03 | 华南理工大学 | Three-bus four-section standby power automatic operation device self-adaption in service and out of service control method |
| EP2765679A1 (en) * | 2013-02-06 | 2014-08-13 | ABB Technology AG | Intelligent electrical power network device |
| CN103595120A (en) * | 2013-11-21 | 2014-02-19 | 长园深瑞继保自动化有限公司 | Multi-incoming-line standby power supply automatic switching-in method |
| CN204271745U (en) * | 2015-01-22 | 2015-04-15 | 江苏省电力公司扬州供电公司 | Automatic switching device of standby power supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104539043A (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104539043B (en) | A kind of automatic switching device of standby power supply system haul oneself willingly into method | |
| CN106129971B (en) | A kind of dual failure fault partition method of busbar protective device breaker and system | |
| CN101917064B (en) | Back-up protection processing method of digital substation transformer based on GOOSE mode | |
| CN104362599A (en) | Method for protecting low-voltage bus of intelligent substation | |
| CN103809052B (en) | Supergrid line protection moving die experiment system, electrification function test method | |
| CN104953705B (en) | Inner bridge spare power automatic switching control method based on incomplete primary main wiring | |
| CN103746349A (en) | Circuit breaker failure protection mechanism of transformer substation and optimal configuration method for circuit breaker protection | |
| CN106786426A (en) | The comprehensive distinguishing method of one Ge Ban main electrical schemes transformer station dead-zone fault | |
| CN204481568U (en) | A kind of power plant is standby throws protective device | |
| CN103580006A (en) | CT broken line discrimination method during bus protection | |
| CN104319743B (en) | The method and apparatus of the main transformer high-pressure side Fast Operating Backup Protection based on station domain information | |
| CN106329492B (en) | A kind of simple bus bar protecting method based on system topological | |
| CN201789272U (en) | Relay protection circuit preventing transformer differential protection malfunction | |
| CN204271745U (en) | Automatic switching device of standby power supply system | |
| CN102005819A (en) | Fault isolation method of electric distribution network | |
| CN105514948A (en) | Backup automatic switching (BZT) apparatus breaker breakdown detection method and BZT apparatus | |
| CN206977035U (en) | A kind of device for reducing high voltage electric equipment detonation damage | |
| CN206235698U (en) | A kind of electric network single-phase earth fault differentiates, isolates and resultant fault anticipation device | |
| CN101958579A (en) | Method of treating information loss in centralized protection device of digitalized substation | |
| CN104868454B (en) | Automatic closing protects system | |
| CN111641193A (en) | Self-adaptive double-bus failure protection method and device | |
| CN207518284U (en) | A kind of accident disconnection device of small power incorporating into power network | |
| CN110098599A (en) | A kind of fault handling method and system of overhead lines combined with cable | |
| CN204947582U (en) | Loop is distributed in the jumping of 220kV failure protection connection rationally | |
| CN111224384B (en) | Method for comparing line voltage vector difference on two sides of line and protecting line breakage by adopting loop closing and opening operation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |