CN108011360A - Double loop round and round quickly unlinks method - Google Patents
Double loop round and round quickly unlinks method Download PDFInfo
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- CN108011360A CN108011360A CN201711487402.9A CN201711487402A CN108011360A CN 108011360 A CN108011360 A CN 108011360A CN 201711487402 A CN201711487402 A CN 201711487402A CN 108011360 A CN108011360 A CN 108011360A
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- busbar
- breaker
- power supply
- round
- loop
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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
Abstract
It is a kind of to make that double loop round and round line load is evenly distributed, line loss is low, power supply reliability is high and prevent certain fault of branch line from causing the double loop round and round of no-voltage of entire station quickly to unlink method.It is after one section of delay tripping busbar breaker of mains side main transformer backup protection, and before two sections of deferred actions of main transformer backup protection, quick excision is articulated in the branched breaker of the mains side on failure side bus, to untie the operation of double loop round and round circuit.It can also be in the other than ring type wiring working line relay fail being mounted between mains side and load side; after one section of delay tripping busbar breaker of main transformer backup protection; quick excision is mounted on the branched breaker on failure side bus; normal busbar is cut off to the path of trouble point power transmission; reach and retain normal side bus load, prevent the widened purpose of fault coverage, improve the reliability of double loop round and round circuit.
Description
Technical field
The present invention relates to a kind of guard method of substation, particularly a kind of protection substation double loop ring connection operation
Method.
Background technology
Using double loop both sides line switching and both sides bus connection switch (both sides refer to the mains side and load side of substation)
The ring connection method of operation to put into operation is, it can be achieved that load evenly distributes, reduces line loss, and it is reliable to improve power supply
Property.For voltage levels 110kv both sides double loop looped network paired running when, if (branch line refers to, in double loop there are branch line
Certain single loop line, the single line being either mounted between mains side and load side) certain branched breaker tripping or relay fail
When, even if (" our station " refers to mains side to our station main transformer backup protection tripping bus connection switch, and " bus connection switch " is mains side connection two
The controlling switch of section busbar), double loop forms outer mother of standing by the bus connection switch of another substation's paired running, can still result in
Our station non-faulting side bus is continuously in malfunction, and the scope that causes the accident expands, and causes no-voltage of entire station.
In order to solve the above-mentioned technical problem, the countermeasure of prior art use is：
1) breaker fail protection (an i.e. newly-increased device with breaker fail protection) is configured, its deficiency is：Only
The situation of line-breaker tripping can be solved, the expansion of accident scope is still resulted in the case of route protection tripping.
2) method of operation is adjusted, double loop, for mode, backup auto-activating device is installed in load side substation using a master one.Its
Deficiency is：The less situation of load is only applicable to, line loss is big when working line load is larger.
The content of the invention
It can make that double loop round and round line load is evenly distributed, line the technical problem to be solved in the present invention is to provide one kind
Path loss consumption is low, power supply reliability is high and can prevent certain fault of branch line from causing the double loop round and round of the no-voltage of entire station quickly side of unlinking
Method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
The double loop round and round of the present invention quickly unlinks method, its step is as follows：
1) the double loop round and round circuit used for：
A. I busbar of power supply of mains side 110kv and II busbar of power supply by busbar breaker and connect, in mains side at least
Two main transformers put into operation and are mounted on respectively on different power supply buses at the same time；
B. load side 110kv's is by electric I busbar and parallel by electric II busbar and put into operation；
C. between mains side and load side, some groups of double loops are mounted, two single loop lines in every group of double loop
Mains side and load side set a branched breaker and put into operation respectively；
D. the mains side of two single loop lines is mounted on different power supply buses and puts into operation respectively；This two single time
The load side of line is mounted on different bus bars and puts into operation respectively；
E. it is connected with section switch between load side, two single loop lines；
2) in the busbar breaker, by the quick solution loop device of the hard contact of characterization point or conjunction state access, by cable
Line collection flows through the current direction of the busbar breaker and the phase difference changing value of the busbar breaker both end voltage；
3) mains side, two branch isolation switch closing positions in two single loop lines in every single loop line, by table
The hard contact of the sign point or conjunction state access quick solution loop device, I busbar of power supply is articulated in gather corresponding single loop line
Or the confirmation message run on II busbar of power supply；
4) on the branched breaker, loop device quickly is solved by the access of the hard contact of characterization point or conjunction state is described,
During with any branched breaker tripping of mains side or relay fail, all power supplys being mounted on the power supply buses of failure side are cut off
The branched breaker of side.
The condition for disconnecting the branched breaker of mains side being mounted on the power supply buses of failure side is：
Busbar breaker described in the main transformer protection tripping of substation, flows through busbar breaker before the tripping busbar breaker
Electric current disconnects the electricity on I mother of all mounting power supplies in the double loop round and round circuit by II busbar flow direction I busbar of power supply of powering
The branched breaker of source；
Alternatively,
Busbar breaker described in the main transformer protection tripping of substation, flows through busbar breaker before the tripping busbar breaker
Electric current is disconnected in the double loop round and round circuit on II mother of all mounting power supplies by I busbar flow direction II busbar of power supply of powering
The branched breaker of mains side.
Before cut-out is mounted on the double loop branched breaker of failure side power supply buses, quick solution loop device " fill
Electricity ", required logical condition is：
1) " quickly unlinking " hard pressing plate is put into；
2) " ring connection operation " hard pressing plate of any group of double loop is put into；
3) busbar breaker closes position；
4) the female busbar of power supply I meets there is press strip part, and the female busbar of power supply II meets there is press strip part；
Meet above-mentioned 1) -4) after condition, after for 10 seconds, complete as the automatic switching control equipment in the quick solution loop device
Charging；
Described " quickly unlinking " hard pressing plate, any " ring connection operation " hard pressing plate are quickly solved outside loop device to be arranged on
Switch.
It is described disconnect the branched breaker of mains side being mounted on the power supply buses of failure side further condition be：
It is for the branched breaker of mains side being mounted on I mother of power supply：
A1. quickly solution loop device " charging " is completed；
A2. the busbar breaker electric current reaches entry condition；
A3. startup of quickly unlinking open into；
A4. the busbar breaker zero-sequence current meets positive direction, or is unsatisfactory for zero sequence direction design conditions and mutually electricity
Stream meets positive direction；
A5. busbar breaker is without stream；
A6. the female busbar of power supply I answers press strip part satisfaction；
Meet that the condition of a1.-a6. continues 40ms, the quick loop device that solves sends " the quick female branch action of excision power supply I " life
Order, excision are mounted on the branched breaker of the female mains side of power supply I；
Alternatively,
It is for the branched breaker of mains side being mounted on II mother of power supply：
B1. quickly solution loop device " charging " is completed；
B2. the busbar breaker electric current reaches entry condition；
B3. startup of quickly unlinking open into；
B4. the busbar breaker zero-sequence current meets opposite direction, or is unsatisfactory for zero sequence direction design conditions and mutually electricity
Stream meets opposite direction；
B5. busbar breaker is without stream；
B6. the female busbar of power supply II answers press strip part satisfaction；
Meet that the condition of b1.-b6. continues 40ms, the quick loop device that solves is sent " the quick female branch action of excision power supply II "
Order, the branched breaker of II female mains side of excision mounting power supply.
Substation's power supply buses are using double-bus main wiring mode or single mother partition main wiring mode.
At least one is mounted between mains side and load side not form double loop round and round mode and put into operation
Single branch line.
The present invention is after one section of delay tripping busbar breaker of mains side main transformer backup protection, in main transformer backup protection two
Before section deferred action, quick excision is articulated in the branched breaker of the mains side on failure side bus, to untie double back wire loop
The operation of shape working line.
The present invention can also in the other than ring type wiring working line relay fail being articulated between mains side and load side,
After one section of delay tripping busbar breaker of main transformer backup protection, quick excision is mounted on the branched breaker on failure side bus,
Normal busbar is cut off to the path of trouble point power transmission, is reached and is retained normal side bus load, prevents the widened purpose of fault coverage,
Improve the reliability of double loop round and round circuit.
Brief description of the drawings
Fig. 1 is the connection diagram of double loop round and round circuit.
Fig. 2 is the recharge logic block diagram of quick solution loop device.
Fig. 3 is the logic diagram of quick I female branch action of solution Huantiao power supply.
Fig. 4 is the logic diagram of quick II female branch action of solution Huantiao power supply.
Reference numeral is as follows：
Embodiment
The method of the present invention is suitable for double loop mounting busbar as double-bus or the mode of connection of single mother partition.The present invention
Method use following connection structure, and make following setting：
1st, the double loop round and round circuit that the quick method of unlinking of the invention is directed to is as follows：
1) I busbar of power supply of the mains side 110kv of substation and II busbar of power supply by busbar breaker and connect, in power supply
Side at least two main transformers (main transformer refers to main transformer) while put into operation and be mounted on respectively on different power supply buses.
2) the load side 110kv's of substation is by electric I busbar and parallel by electric II busbar and put into operation.
3) between mains side and load side, some groups of double loops are mounted, or be mounted with some groups of double loops and single line
The grouping circuits on road.
The mains side and load side of two single loop lines in every group of double loop set a branched breaker and throwing respectively
Enter operation.
4) mains side of every single loop line in two single loop lines respectively by and two isolation switch connecing mount
In different power supply buses and select one and put into operation；The load side of two single loop lines passes through respective another isolation switch respectively
It is mounted on different bus bars and puts into operation.
5) it is mounted with section switch between load side, two single loop lines.
2nd, improvement of the invention
1) above-mentioned mains side refers to the side that electric energy is provided in two substation bus bars of double loop connection, and load side refers both to
Receive the side of electric energy in two substation bus bars of double loop connection.
2) mains side main electrical scheme uses double bus scheme mode.
3) mains side at least two main transformers (1#B and 2#B in such as 1) while put into operation and be mounted on different mothers respectively
Line.
4) the trip position TWJ-ML of power supply side bus busbar breaker (component of ML meanings, abbreviation mother in Fig. 1), by
The quick solution loop device of hard contact access of characterization point, conjunction state.
In quickly solution loop device, for mains side busbar breaker in when dividing position, trip position is denoted as 1, TWJ-ML=
1；In when closing position, trip position is denoted as 0, TWJ-ML=0.
5) mains side double loop branch isolation switch closing position is quickly unlinked by the hard contact access of characterization point, conjunction state
Device.
The closing position of branch isolation switch is expressed as：DZ-1G-*L, DZ-2G-*L, wherein " * L " represent certain branch,
Such as：The female isolation switch positional representation of m branches I is DZ-1G-mL, and the female isolation switch positional representation of m circuits II is DZ-2G-mL.
In quick solution loop device, DZ-2G-mL=0, expression m branches extension I are female at the same time by DZ-1G-mL=1；DZ-1G-mL=0 while DZ-
It is female that 2G-mL=1 represents that m branches hang II.
6) " pressure of branch m_ disconnecting links " soft pressing plate, " pressure of branch m_1G disconnecting links " soft pressing plate are set, " branch m_2G disconnecting links are strong
The soft pressing plate of system ".Judge that branch m is mounted by the disconnecting link positional information of m branches when " pressure of branch m_ disconnecting links " soft pressing plate exits
Busbar, when " pressure of branch m_ disconnecting links " soft pressing plate is put into, passes through " pressure of branch m_1G disconnecting links " soft pressing plate, " branch m_2G disconnecting links
The throwing of the soft pressing plate of pressure " moves back condition adjudgement branch m and mounts busbar.
7) " operation of X rings ring connection " hard pressing plate is set, which represents that X rings double loop is transported using ring connection
Line mode.If the double loop branch maintenance or out of service of some ring, the ring connection of corresponding ring runs hard pressing plate and exits.
8) " quickly unlinking " hard pressing plate is set, which represents that quick solution loop device puts into the fast of the method for the present invention
Speed solution ring function.Quick solution ring function receives mains side busbar breaker position, busbar breaker electric current, busbar voltage, double back
Line disconnecting link position, after carrying out logic judgment in the present inventive method, the double loop branch line for performing order excision failure side bus breaks
Road device.
It is exemplified below：
As shown in Figure 1, for the actively powered system that mains side is double-bus, transformer 1#B is hung on the mother of power supply I, transformation
It is female that device 2#B is hung on power supply II.
#1 rings (i.e. number one double loop loop line)：
It is made of single branch line #1L and #2L.
Mains side：Single branch line #1L is mounted on I mother of power supply by branched breaker 1DL and puts into operation, and single branch line #2L passes through
Branched breaker 2DL is mounted on II mother of power supply and puts into operation；
Load side：Single branch line #1L is mounted on, only branch line #2L female or female by electricity II by electricity I by branched breaker 11DL
It is articulated in by branched breaker 12DL on the bus bar different from the bus bar of single branch line #1L mountings；
Section switch is also associated between the single branch line #1L and single branch line #2L of load side.
#2 rings：
It is made of single branch line #3L and #4L.
Mains side：Single branch line #3L is mounted on I mother of power supply by branched breaker 3DL and puts into operation, and single branch line #4L passes through
Branched breaker 4DL is mounted on II mother of power supply and puts into operation；
Load side：Single branch line #3L is mounted on, only branch line #4L female or female by electricity II by electricity I by branched breaker 13DL
It is articulated in by branched breaker 14DL on the bus bar different from the bus bar of single branch line #3L mountings；
Section switch is also associated between the single branch line #3L and single branch line #4L of load side.
#3 rings：
It is made of single branch line #5L and #6L.
Specific connection mode is for example preceding identical.
#7L lines and #8L lines are mounting mains side and the single line of load side, and #7L is hung on the mother of power supply I, and #8L is hung on power supply II
It is female.
During system normal operation, mains side busbar breaker closes position, and main transformer #1B, #2B put into operation, #1 ring double back wire loops
Shape wiring operation, the operation of #2 ring double loops ring connection, the operation of #3 ring double loops ring connection, #7L, #8L put into operation.
The result to be realized of this example is：If #7L or #8L line faults make its corresponding line relay fail, after main transformer
After standby one section of delay tripping bus connection switch (21DL and 22DL institutes finger in Fig. 1) of protection, prolong for two sections in main transformer backup protection
When action before, quick excision is mounted on the double loop branched breaker of fault bus, cuts off normal side bus to trouble point
Supply path, prevents accident scope from expanding.
In this example, double loop round and round circuit quickly unlinks method, comprises the following steps：
First, to quick solution loop device " charging ", the usage that " charging " continues to use power industry is somebody's turn to do, refers to one before satisfaction action
A little necessary conditions.As shown in Fig. 2, it is to the logical condition of quick solution loop device " charging "：
(1) " quickly unlinking " hard pressing plate is put into, into quick function operation pattern of unlinking；
(2) " operation of #1 rings ring connection " hard pressing plate is put into, puts into " operation of #2 rings ring connection " hard pressing plate, puts into " #3
The hard pressing plate of ring ring connection operation "；
(3) mains side busbar breaker closes position, TWJ-ML=0；
(4) I female busbar of powering meets there is press strip part, and the female busbar satisfaction of power supply II has press strip part, and (busbar has press strip part to refer to, female
Line voltage between phases, which is all higher than busbar, pressure definite value).
Meet the condition of above-mentioned (1)-(4), persistently meet 10 seconds, complete to quick solution loop device " charging ".To quick solution
The purpose of loop device " charging ", is worked normally to enable quickly to solve loop device, is the initial strip for performing the method for the present invention
Part, if the not limitation of the condition, the quick loop device that solves may not enter normal operating conditions, therefore, to the quick dress that unlinks
Put the material conditions that " charging " is the double loop branched breaker that follow-up excision is mounted on failure side bus.
2nd, excision is mounted on the double loop branched breaker of failure side bus, is divided into two kinds of situations：
The first situation, as shown in figure 3, excision is mounted on the female double loop branched breaker logic of power supply I：
(1) loop device " charging " is quickly solved to complete；
(2) mother electric current reaches entry condition (two cycle Sudden Changing Rate of mother electric current reaches 0.5In, and In refers to busbar breaker
Bis- rated values of CT, entry condition inside keep 7S)；
(3) quick startup of unlinking is opened into (any main transformer is jumped mother contact and opened into startup is opened to keep into inside mark
300ms)；
(4) mother zero-sequence current meets positive direction, or is unsatisfactory for zero sequence direction design conditions and mother phase current satisfaction
(mother zero-sequence current positive direction refers to mother zero-sequence current and refers to mother phase by II female mother of inflow I, mother phase current positive direction positive direction
Electric current is female by II female inflow I；Startup is received to open into the moment, internal if electric current positive direction condition meets to keep 300ms)；
(5) busbar breaker refers to mother three-phase current and is respectively less than 0.05In without stream；
(6) I female busbar of power supply answer press strip part and meets that (busbar, which answers press strip part satisfaction and refers to busbar line voltage and be respectively less than low-voltage, to be determined
Value, either bus residual voltage is more than residual voltage definite value or busbar negative sequence voltage is more than negative sequence voltage definite value).
Meet the condition of (1)-(6), persistently meet 40ms, the quick loop device that solves is sent " the quick female branch action of excision I "
Order, excision mounting power supply I female #1L, #3L, #5L line-breaker 1DL, 3DL, 5DL.
The second situation, as shown in figure 4, excision is mounted on the female double loop branched breaker logic of power supply II：
(1) loop device " charging " is quickly solved to complete；
(2) mother electric current reaches entry condition (two cycle Sudden Changing Rate of mother electric current reaches 0.5In, and In refers to busbar breaker
Bis- rated values of CT, entry condition inside keep 7S)；
(3) quick startup of unlinking is opened into (any main transformer is jumped mother contact and opened into startup is opened to keep into inside mark
300ms)；
(4) mother zero-sequence current meets opposite direction, or is unsatisfactory for zero sequence direction design conditions and mother phase current satisfaction
(zero-sequence current opposite direction refers to mother zero-sequence current and refers to mother phase current by I female mother of inflow II, mother phase current opposite direction opposite direction
It is female by I female inflow II；Startup is received to open into the moment, internal if electric current opposite direction condition meets to keep 300ms)；
(5) busbar breaker refers to mother three-phase current and is respectively less than 0.05In without stream,
(6) II female busbar of powering answers press strip part and meets that (busbar answers press strip part and meets that referring to busbar line voltage is respectively less than low-voltage
Definite value, either bus residual voltage is more than residual voltage definite value or busbar negative sequence voltage is more than negative sequence voltage definite value).
Meet the condition of (1)-(6), persistently meet 40ms, the quick loop device that solves is sent " the quick female branch action of excision II "
Order, excision mounting power supply II female #2L, #4L, #6L line-breaker 2DL, 4DL, 6DL.
In instances, loop device is quickly solved using the ISA-358GL types of CYG Sunrui Co., Ltd., passed through
The connection structure of hard contact access, obtains mains side mother position, mother electric current, busbar voltage, double loop disconnecting link position point,
Information is closed, using ansi standard c programming language, after performing logic judgment, the operation for operating quick solution loop device operation panel part is returned
The tripping contact on road, the order for performing tripping is sent to operating mechanism, in embodiment 1,
Judgement meets charge condition (1)-(4), persistently meets 10 seconds, completes the record to quick solution loop device charging：
Charged Rec()。
The first situation judges the condition for meeting (1)-(6), persistently meets 40ms, sends and " quickly cuts off I female branch to move
Make " order：TripBus01().
The second situation judges the condition for meeting (1)-(6), persistently meets 40ms, sends and " quickly cuts off II female branch to move
Make " order：TripBus02().
The method of the present invention, using the purpose for first giving quick solution loop device " charging ", is entered to quickly solve loop device
Implement the original state of the method for the present invention, to meet that excision is mounted on the prerequisite bar of the double loop branched breaker of fault bus
Part, then quickly solution loop device is patrolled according to the execution of the information such as mother position, mother electric current, busbar voltage, double loop disconnecting link position
Volume, send trip signal, the double loop branched breaker on tripping failure side bus, it is ensured that normal side bus continues to run with, and prevents
Only accident scope expands, and improves power supply reliability, is run for use double loop ring connection and realizes that load is evenly distributed, reduced
Line loss provides guarantee.
Claims (6)
- A kind of method 1. double loop round and round quickly unlinks, its step are as follows：1) the double loop round and round circuit used for：A. I busbar of power supply of mains side 110kv and II busbar of power supply by busbar breaker and connect, in mains side at least two Main transformer puts into operation and is mounted on respectively on different power supply buses at the same time；B. load side 110kv's is by electric I busbar and parallel by electric II busbar and put into operation；C. between mains side and load side, some groups of double loops, the power supply of two single loop lines in every group of double loop are mounted Side and load side set a branched breaker and put into operation respectively；D. the mains side of two single loop lines is mounted on different power supply buses and puts into operation respectively；Two single loop lines Load side is mounted on different bus bars and puts into operation respectively；E. it is connected with section switch between load side, two single loop lines；2) in the busbar breaker, by the quick solution loop device of the hard contact of characterization point or conjunction state access, adopted by cable Collection flows through the current direction of the busbar breaker and the phase difference changing value of the busbar breaker both end voltage；3) mains side, two branch isolation switch closing positions in two single loop lines in every single loop line, by characterization point Or the quick solution loop device described in the hard contact access of conjunction state, it is articulated in I busbar of power supply or confession to gather corresponding single loop line The confirmation message run on electric II busbar；4) on the branched breaker, by the hard contact of the characterization point or conjunction state access quick solution loop device, with electricity When any branched breaker tripping of source or relay fail, all mains sides being mounted on the power supply buses of failure side are cut off Branched breaker.
- The method 2. double loop round and round according to claim 1 quickly unlinks, it is characterised in that：Disconnection is mounted on failure The condition of the branched breaker of mains side on the power supply buses of side is：Busbar breaker described in the main transformer protection tripping of substation, the electric current of busbar breaker is flowed through before the tripping busbar breaker By II busbar flow direction I busbar of power supply of powering, the mains side on I mother of all mounting power supplies in the double loop round and round circuit is disconnected Branched breaker；Alternatively,Busbar breaker described in the main transformer protection tripping of substation, the electric current of busbar breaker is flowed through before the tripping busbar breaker By I busbar flow direction II busbar of power supply of powering, the power supply on II mother of all mounting power supplies in the double loop round and round circuit is disconnected The branched breaker of side.
- The method 3. double loop round and round according to claim 2 quickly unlinks, it is characterised in that：Event is mounted in cut-out Before the double loop branched breaker for hindering side power supply buses, " charging " is carried out to quick solution loop device, required logical condition is：1) " quickly unlinking " hard pressing plate is put into；2) " ring connection operation " hard pressing plate of any group of double loop is put into；3) busbar breaker closes position；4) the female busbar of power supply I meets there is press strip part, and the female busbar of power supply II meets there is press strip part；Meet above-mentioned 1) -4) after condition, after for 10 seconds, complete to fill for the automatic switching control equipment in the quick solution loop device Electricity；Described " quickly unlinking " hard pressing plate, any " ring connection operation " hard pressing plate are to be arranged on opening outside quick solution loop device Close.
- The method 4. double loop round and round according to claim 3 quickly unlinks, it is characterised in that：The disconnection is mounted on The further condition of the branched breaker of mains side on the power supply buses of failure side is：It is for the branched breaker of mains side being mounted on I mother of power supply：A1. quickly solution loop device " charging " is completed；A2. the busbar breaker electric current reaches entry condition；A3. startup of quickly unlinking open into；A4. the busbar breaker zero-sequence current meets positive direction, or is unsatisfactory for zero sequence direction design conditions and phase current is expired Sufficient positive direction；A5. busbar breaker is without stream；A6. the female busbar of power supply I answers press strip part satisfaction；Meeting that the condition of a1.-a6. continues 40ms, the quick loop device that solves sends " the quick female branch action of excision power supply I " order, Excision is mounted on the branched breaker of the female mains side of power supply I；Alternatively,It is for the branched breaker of mains side being mounted on II mother of power supply：B1. quickly solution loop device " charging " is completed；B2. the busbar breaker electric current reaches entry condition；B3. startup of quickly unlinking open into；B4. the busbar breaker zero-sequence current meets opposite direction, or is unsatisfactory for zero sequence direction design conditions and phase current is expired Sufficient opposite direction；B5. busbar breaker is without stream；B6. the female busbar of power supply II answers press strip part satisfaction；Meeting that the condition of b1.-b6. continues 40ms, the quick loop device that solves sends " the quick female branch action of excision power supply II " order, The branched breaker of II female mains side of excision mounting power supply.
- The method 5. double loop round and round according to claim 1 quickly unlinks, it is characterised in that：Substation's power supply buses Using double-bus main wiring mode or single mother partition main wiring mode.
- The method 6. double loop round and round according to claim 1 quickly unlinks, it is characterised in that：In mains side and load At least one single branch line for not forming double loop round and round mode and putting into operation is mounted between side.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460025A (en) * | 2019-08-15 | 2019-11-15 | 国网四川省电力公司宜宾供电公司 | Quick method and device thereof of unlinking |
| CN110601350A (en) * | 2019-09-23 | 2019-12-20 | 云南电网有限责任公司曲靖供电局 | High-voltage self-adaptive area spare power automatic switching system and spare power automatic switching control method thereof |
| CN111856213A (en) * | 2020-08-05 | 2020-10-30 | 云南电网有限责任公司红河供电局 | Fault positioning method for looped network operation |
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| CN111856213B (en) * | 2020-08-05 | 2023-05-26 | 云南电网有限责任公司红河供电局 | Fault positioning method for ring network operation |
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