CN107317308B - Sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method - Google Patents
Sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method Download PDFInfo
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- CN107317308B CN107317308B CN201710631708.0A CN201710631708A CN107317308B CN 107317308 B CN107317308 B CN 107317308B CN 201710631708 A CN201710631708 A CN 201710631708A CN 107317308 B CN107317308 B CN 107317308B
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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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
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Abstract
The invention discloses a kind of sectionalized single busbar connection 110kV bus differential protections to be adaptively latched prepared auto restart guard method; applied to 110kV sectionalized single busbar connection primary connection circuit grid, I section of bus breaker is jumped including 1) bus differential protection action and is latched the control method that No. 1 power circuit breaker closes a floodgate simultaneously；2) bus differential protection action jumps II section of bus breaker and is latched the control method that No. 2 power circuit breakers close a floodgate simultaneously；3) bus differential protection action jumps the control method that section switch is latched section switch combined floodgate simultaneously.The present invention correctly acts locking prepared auto restart movement to 110kV bus-bar fault under the various methods of operation and closes a floodgate, and prevents prepared auto restart accidentally from throwing on faulty equipment, is conducive to power network safety operation.
Description
Technical field
The present invention relates to a kind of locking prepared auto restart guard method more particularly to a kind of sectionalized single busbar connection 110kV bus differential protections
Adaptive locking prepared auto restart guard method, belongs to electrical equipment technical field.
Background technique
At present since single-trunk segmental wiring 110kV electric substation does not install special 110kV bus differential protecting, so
It is (referred to as standby to be latched 110kV automatic throw-in equipment of emergency power supply as 110kV bus protection using the protection of 110kV electric power incoming line
From throwing).110kV electric power incoming line protection blocking 110kV prepared auto restart scheme has the following problems: 1. for I section of bus of 110kV or
When II section of bus of 110kV has outlet route, in outlet line failure, the protection protection of 110kV electric power incoming line can not judge
It is 110kV line fault or 110kV bus-bar fault；2. when two bus operations of electric power incoming line band all the way, in any bus
The protection of 110kV electric power incoming line can not judge the II section of bus event of I section of bus-bar fault of 110kV or 110kV in the case of breaking down
Barrier.Above-mentioned two problems are insoluble problems existing for 110kV electric power incoming line protection blocking 110kV prepared auto restart, and are used
110kV bus differential protection locking prepared auto restart can overcome the above problem.But it is installed in the 110kV electric substation of single-trunk segmental wiring
After 110kV bus differential protection, how it to be latched prepared auto restart, is the new issue that relay protection staff faces.
Summary of the invention
The purpose of the present invention is to provide a kind of sectionalized single busbar connection 110kV bus differential protections to be adaptively latched prepared auto restart protection side
Method is applied to transmission and distribution networks, after the 110kV electric substation installing 110kV bus differential protection for solving single-trunk segmental wiring, how to close
The technical issues of locking prepared auto restart.
The purpose of the present invention is achieved by the following technical programs:
A kind of sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, is applied to 110kV single busbar
It is segmented primary connection circuit grid, sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method are as follows:
1. bus differential protection action jumps I section of bus breaker control method that No. 1 power circuit breaker of locking closes a floodgate simultaneously
1.1 conditions 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
1.2 conditions 2:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of 110kV, disregards segmentation or mother CT electric current at this time；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
1.3 conditions 3:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) No. 1 power branch breaker incoming relay-protection movements；
(3) No. 1 power branch breakers are in closing position；
(4) section switch is in open position；
(5) No. 2 power branch breakers are in closing position；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
2. bus differential protection action jumps II section of bus breaker and is latched the control method packet that No. 2 power circuit breakers close a floodgate simultaneously
It includes:
2.1 conditions 1:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
After above-mentioned condition is all satisfied, bus differential protection action jumps II section of bus breaker and is latched No. 2 power circuit breakers simultaneously
It closes a floodgate；
2.2 conditions 2:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of 110kV, disregards segmentation or mother CT electric current at this time；
After above-mentioned condition is all satisfied, bus differential protection action jumps II section of bus breaker and is latched No. 2 power circuit breakers simultaneously
It closes a floodgate；
2.3 conditions 3:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) No. 2 power branch breaker incoming relay-protection movements；
(3) No. 1 power branch breakers are in closing position；
(4) section switch is in open position；
(5) No. 2 power branch breakers are in closing position；
After above-mentioned condition meets, bus differential protection action jumps II section of bus breaker and is latched No. 2 power circuit breakers conjunctions simultaneously
Lock；
3. bus differential protection action jumps section switch while being latched the control method that section switch closes a floodgate
(1) the big differential relay movement of the female difference of 110kV；
(2) I section of bus compound voltage lockout of 110kV is open or II section of bus compound voltage lockout of 110kV is open；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
The purpose of the present invention can also be further realized by following technical measures:
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein I section of bus of 110kV
Upper outlet protection refers to outlet protection, transformer differential protection and transformer 110kV side back-up protection on I section of bus of 110kV；
Outlet protection refers to outlet protection, transformer differential protection and transformer on II section of bus of 110kV on II section of bus of 110kV
The back-up protection of the side 110kV.
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein No. 1 power branch is disconnected
Road device incoming relay-protection and No. 2 power branch breaker incoming relay-protections are by phase distance protection, ground distance protection, direction zero sequence
Current protection is constituted.
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein No. 1 power branch is disconnected
Road device incoming relay-protection and No. 2 power branch breaker incoming relay-protections are by the protection of direction phase current, direction zero-sequence current protection structure
At.
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein the side of incoming relay-protection
To element, bus is directed toward by route in direction.
Compared with prior art, the beneficial effects of the present invention are:
1. the scheme of electric substation's 110kV bus differential protection locking prepared auto restart of the invention can be right under the various methods of operation
110kV bus-bar fault correctly acts locking prepared auto restart movement and closes a floodgate, and prevents prepared auto restart accidentally from throwing on faulty equipment, is conducive to electricity
Net safe and stable operation.
2. the scheme of electric substation's 110kV bus differential protection locking prepared auto restart of the invention is under the various methods of operation, in 110kV
When outlet failure, it can not accidentally the movement of locking prepared auto restart close a floodgate, improve power grid power supply reliability.
3. the scheme of electric substation's 110kV bus differential protection locking prepared auto restart of the invention, logic are simple and easy.
4. technical solution of the present invention is able to use:
(1) there was only that the female poor branch of two power supplys has power supply and outlet branch, transformer branch do not have the case where power supply；
The female poor branch of (2) two power supplys has power supply, and outlet branch, transformer branch also have the case where power supply.
Detailed description of the invention
Fig. 1 is that 110kV bus differential protecting is latched prepared auto restart schematic diagram；
Fig. 2 is 110kV electric substation sectionalized single busbar connection primary connection circuit figure；
Fig. 3 is 220kV electric substation 110kV double-bus (sectionalized single busbar connection) primary connection circuit figure；
Symbol description is as follows in Fig. 1:
Indicate logical AND relationship, i.e., when input condition all meets, output is effective；
Indicate logic or relationship, i.e., input condition is any when meeting, and output is effective.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in Figure 1, sectionalized single busbar connection 110kV bus differential protection of the invention is adaptively latched the work of prepared auto restart guard method
Make principle are as follows:
1. bus differential protection action jumps I section of bus breaker control method that No. 1 power circuit breaker of locking closes a floodgate simultaneously
1.1 conditions 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
1.2 conditions 2:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of 110kV, disregards segmentation or mother CT electric current at this time；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
1.3 conditions 3:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) No. 1 power branch breaker incoming relay-protection movements；
(3) No. 1 power branch breakers are in closing position；
(4) section switch is in open position；
(5) No. 2 power branch breakers are in closing position；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 1 power circuit breaker conjunction simultaneously
Lock；
2. bus differential protection action jumps II section of bus breaker and is latched the control method packet that No. 2 power circuit breakers close a floodgate simultaneously
It includes:
2.1 conditions 1:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
After above-mentioned condition is all satisfied, bus differential protection action jumps II section of bus breaker and is latched No. 2 power circuit breakers simultaneously
It closes a floodgate；
2.2 conditions 2:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of 110kV, disregards segmentation or mother CT electric current at this time；
After above-mentioned condition is all satisfied, bus differential protection action jumps II section of bus breaker and is latched No. 2 power circuit breakers simultaneously
It closes a floodgate；
2.3 conditions 3:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) No. 2 power branch breaker incoming relay-protection movements；
(3) No. 1 power branch breakers are in closing position；
(4) section switch is in open position；
(5) No. 2 power branch breakers are in closing position；
After above-mentioned condition meets, bus differential protection action jumps I section of bus breaker and is latched No. 2 power circuit breakers conjunctions simultaneously
Lock；
3. bus differential protection action jumps section switch while being latched the control method that section switch closes a floodgate
(1) the big differential relay movement of the female difference of 110kV；
(2) I section of bus compound voltage lockout of 110kV is open or II section of bus compound voltage lockout of 110kV is open；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein I section of bus of 110kV
Upper outlet protection refers to outlet protection, transformer differential protection and transformer 110kV side back-up protection on I section of bus of 110kV；
Outlet protection refers to outlet protection, transformer differential protection and transformer on II section of bus of 110kV on II section of bus of 110kV
The back-up protection of the side 110kV.
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein No. 1 power branch is disconnected
Road device incoming relay-protection and No. 2 power branch breaker incoming relay-protections are by phase distance protection, ground distance protection, direction zero sequence
Current protection is constituted.Alternatively, No. 1 power branch breaker incoming relay-protection and No. 2 power branch breaker incoming relay-protections are by side
It is constituted to phase current protection, direction zero-sequence current protection.
Aforementioned sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, wherein the side of incoming relay-protection
To element, bus is directed toward by route in direction.
Transmission and distribution networks applied by method of the invention meet following primary connection circuit:
(1) 110kV electric substation 110kV sectionalized single busbar connection primary connection circuit；
(2) 220kV electric substation 110kV double-bus primary connection circuit；
(3) 220kV electric substation 110kV sectionalized single busbar connection primary connection circuit.
As shown in Fig. 2, including: No. 1 electric power incoming line branch in 110kV electric substation 110kV sectionalized single busbar connection primary connection circuit
Equipment, No. 2 electric power incoming line branch equipments are separately connected II section of I section of bus of 110kV, 110kV bus；I section of bus of 110kV and II section
There is section switch between bus, and is serially connected with segmented current mutual inductor (abbreviation CT)；No. 1 electric power incoming line branch spacing devices, 2
Number electric power incoming line branch spacing devices have breaker, and are serially connected with CT disconnecting switch etc.；In addition, I section of bus of 110kV is further connected with 1
Number transformer branch, No. 2 transformer branches, No. 1 110kV outlet branch and 110kV voltage transformer (abbreviation PT), can also have
110kV bus arrester；II section of bus of 110kV is further connected with No. 3 transformer branches, No. 2 110kV outlet branches and 110kV PT,
There can also be 110kV bus arrester.
Fig. 3 is 220kV electric substation 110kV double-bus (sectionalized single busbar connection) primary connection circuit figure；Power branch open circuit in Fig. 3
Device connection is 220kV transformer, and 110kV outlet branch is directly to be connected to 110kV transformer by 110kV route.
Electricity is used since the 110kV side bus of configuration is protected for above-mentioned 110kV sectionalized single busbar connection primary connection circuit
Bus-bar fault lock-out scheme of the female poor breaker protection in source to 110kV prepared auto restart.
The embodiment of the method for the present invention is given below, by taking Fig. 2 as an example:
No. 1.1 power circuit breakers, No. 2 power circuit breaker operations, section switch stand-by heat
1.1 I section of 110kV bus-bar faults
Because of No. 1 power circuit breaker, No. 2 power circuit breaker operations, section switch stand-by heat, i.e. section switch separating brake
Position.When I section of bus-bar fault of 110kV, the circuit breaker incoming relay-protection movement of No. 1 power supply, I section of bus of 110kV is taken no account of point
The small differential relay starting of section electric current, I section of big differential relay starting of the female difference of 110kV, 110kV bus compound voltage lockout item
Part is open, and bus differential protection action jumps I section of bus breaker and is latched section switch combined floodgate simultaneously.
1.2 II section of 110kV bus-bar faults
Because of No. 1 power circuit breaker, No. 2 power circuit breaker operations, section switch stand-by heat, i.e. section switch separating brake
Position.When II section of bus-bar fault of 110kV, the circuit breaker incoming relay-protection movement of No. 2 power supplys, II section of bus of 110kV is taken no account of
II section of small differential relay starting of segmented current, the big differential relay starting of the female difference of 110kV, 110kV bus compound electric press off
Bolt part is open, and bus differential protection action jumps II section of bus breaker and is latched section switch combined floodgate simultaneously.
Outlet line fault on 1.3 I section of 110kV buses
Because of No. 1 power circuit breaker, No. 2 power circuit breaker operations, section switch stand-by heat, i.e. section switch separating brake
Position.When outlet route (or transformer) failure on I section of bus of 110kV, the big differential relay of 110kV bus differential protection is reflected as
External area error is not so will start, therefore will not be latched 110kV prepared auto restart.
Outlet line fault on 1.4 II section of 110kV buses
Because of No. 1 power circuit breaker, No. 2 power circuit breaker operations, section switch stand-by heat, i.e. section switch separating brake
Position.When outlet route (or transformer) failure on II section of bus of 110kV, the big differential relay reflection of 110kV bus differential protection
For external area error so not will start, therefore 110kV prepared auto restart will not be latched.
It breaks down between 1.5 section switches and segmentation CT
Because of No. 1 power circuit breaker, No. 2 power circuit breaker operations, section switch stand-by heat, i.e. section switch separating brake
Position.It breaks down when between section switch and segmentation CT, since segmentation CT is located at I section of bus bar side of 110kV, is equivalent to
I section of bus-bar fault of 110kV, although the I sections of small differential relays of bus do not start, the big differential relay starting of the female difference of 110kV,
I section of bus compound voltage lockout condition of 110kV is open, therefore starts bus differential protection action I section of bus breaker of jump and be latched simultaneously
Section switch closes a floodgate.
No. 2.1 power circuit breakers, section switch operation, No. 2 power circuit breaker stand-by heats
2.1 I section of 110kV bus-bar faults
Because No. 1 power circuit breaker, section switch are run, No. 2 power circuit breaker stand-by heats, i.e. No. 2 power circuit breakers
Open position.When I section of bus-bar fault of 110kV, small differential relay, the 110kV of I section of bus meter of 110kV and segmented current are female
Poor big differential relay starting, I section of bus compound voltage lockout condition of 110kV and II section of bus compound voltage lockout condition are opened
It puts, bus differential protection action jumps I section of bus breaker, II section of bus breaker and section switch and closes a floodgate, while being latched No. 1 power supply
Branch breaker, No. 2 power branch breakers and section switch close a floodgate.
2.2 II section of 110kV bus-bar faults
Because No. 1 power circuit breaker, section switch are run, No. 2 power circuit breaker stand-by heats, i.e. No. 2 power circuit breakers
Open position.When II section of bus-bar fault of 110kV, the small differential relay, 110kV of II section of bus meter of 110kV and segmented current
Female big differential relay of difference starts, II section of bus compound voltage lockout condition of 110kV is open, and bus differential protection action jumps II section of bus
Breaker and section switch close a floodgate, while being latched No. 2 power branch breakers and section switch combined floodgate.
Outlet line fault on 2.3 I section of 110kV buses
Because No. 1 power circuit breaker, section switch are run, No. 2 power circuit breaker stand-by heats, i.e. No. 2 power circuit breakers
Open position.When outlet route (or transformer) failure on I section of bus of 110kV, the big differential relay of 110kV bus differential protection is anti-
Reflecting not will start for external area error is all, therefore will not be latched 110kV prepared auto restart.
Outlet line fault on 2.4 II section of 110kV buses
Because No. 1 power circuit breaker, section switch are run, No. 2 power circuit breaker stand-by heats, i.e. No. 2 power circuit breakers
Open position.When outlet route (or transformer) failure on II section of bus of 110kV, the big differential relay of 110kV bus differential protection
External area error is reflected as so not will start, therefore 110kV prepared auto restart will not be latched.
It breaks down between 2.5 section switches and segmentation CT
Because No. 1 power circuit breaker, section switch are run, No. 2 power circuit breaker stand-by heats, i.e. No. 2 power circuit breakers
Open position.It breaks down when between section switch and segmentation CT, since segmentation CT is located at I section of bus bar side of 110kV, is equivalent to
The big differential relay of the female difference of small differential relay, 110kV of II section of bus-bar fault of 110kV, II section of bus meter of 110kV and segmented current
II section of device starting, 110kV bus compound voltage lockout condition are open, and bus differential protection action jumps II section of bus breaker and segmentation is disconnected
Road device, while being latched the combined floodgate that prepared auto restart starts No. 2 power circuit breakers.Simultaneously as the big differential relay of the female difference of 110kV opens
It is dynamic, I section of bus compound voltage lockout condition of 110kV is open, bus differential protection action jumps I section of bus breaker, at the same be latched it is standby from
Throw the combined floodgate of No. 1 power circuit breaker of starting.To sum up, this result is that bus differential protection action jumps I section of bus breaker, II section of bus breaks
Road device and section switch, while being latched No. 1 power circuit breaker, No. 2 power circuit breakers and section switch and closing a floodgate.
No. 3.2 power circuit breakers, section switch operation, No. 1 power circuit breaker stand-by heat
3.1 I section of 110kV bus-bar faults
Because No. 2 power circuit breakers, section switch are run, No. 1 power circuit breaker stand-by heat, i.e. No. 1 power circuit breaker
Open position.When I section of bus-bar fault of 110kV, small differential relay, the 110kV of I section of bus meter of 110kV and segmented current are female
Poor big differential relay starting, I section of bus compound voltage lockout condition of 110kV and II section of bus compound voltage lockout condition are opened
It puts, bus differential protection action jumps I section of bus breaker, II section of bus breaker and section switch and closes a floodgate, while being latched No. 1 power supply
Branch breaker, No. 2 power branch breakers and section switch close a floodgate.
3.2 II section of 110kV bus-bar faults
Because No. 2 power circuit breakers, section switch are run, No. 1 power circuit breaker stand-by heat, i.e. No. 1 power circuit breaker
Open position.When II section of bus-bar fault of 110kV, the small differential relay, 110kV of II section of bus meter of 110kV and segmented current
Female big differential relay of difference starts, I section of bus compound voltage lockout condition of 110kV and II section of bus compound voltage lockout condition are opened
It puts, bus differential protection action jumps I section of bus breaker, II section of bus breaker and section switch and closes a floodgate, while being latched No. 1 power supply
Branch breaker, No. 2 power branch breakers and section switch close a floodgate.
Outlet line fault on 3.3 I section of 110kV buses
Because No. 2 power circuit breakers, section switch are run, No. 1 power circuit breaker stand-by heat, i.e. No. 1 power circuit breaker
Open position.When outlet route (or transformer) failure on I section of bus of 110kV, the big differential relay of 110kV bus differential protection is anti-
Reflecting not will start for external area error is all, therefore will not be latched 110kV prepared auto restart.
Outlet line fault on 3.4 II section of 110kV buses
Because No. 2 power circuit breakers, section switch are run, No. 1 power circuit breaker stand-by heat, i.e. No. 1 power circuit breaker
Open position.When outlet route (or transformer) failure on II section of bus of 110kV, the big differential relay of 110kV bus differential protection
External area error is reflected as so not will start, therefore 110kV prepared auto restart will not be latched.
It breaks down between 3.5 section switches and segmentation CT
Because No. 2 power circuit breakers, section switch are run, No. 1 power circuit breaker stand-by heat, i.e. No. 1 power circuit breaker
Open position.It breaks down when between section switch and segmentation CT, since segmentation CT is located at I section of bus bar side of 110kV, is equivalent to
The big differential relay of the female difference of small differential relay, 110kV of II section of bus-bar fault of 110kV, II section of bus meter of 110kV and segmented current
II section of device starting, 110kV bus compound voltage lockout condition are open, and bus differential protection action jumps II section of bus breaker and segmentation is disconnected
Road device, while being latched the combined floodgate that prepared auto restart starts No. 2 power circuit breakers.Simultaneously as the big differential relay of the female difference of 110kV opens
It is dynamic, I section of bus compound voltage lockout condition of 110kV is open, bus differential protection action jumps I section of bus breaker, at the same be latched it is standby from
Throw the combined floodgate of No. 1 power circuit breaker of starting.To sum up, this result is that bus differential protection action jumps I section of bus breaker, II section of bus breaks
Road device and section switch, while being latched No. 1 power circuit breaker, No. 2 power circuit breakers and section switch and closing a floodgate.
In addition to the implementation, the present invention can also have other embodiments, all to use equivalent substitution or equivalent transformation shape
At technical solution, be all fallen within the protection domain of application claims.
Claims (5)
1. a kind of sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart guard method, it is applied to 110kV single busbar point
Section primary connection circuit grid, which is characterized in that sectionalized single busbar connection 110kV bus differential protection is adaptively latched prepared auto restart protection side
Method are as follows:
1) bus differential protection action, which jumps I section of bus breaker while being latched the control method that No. 1 power circuit breaker closes a floodgate, includes:
Condition 1:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
Condition 2:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of I section of bus of 110kV, disregards segmentation or mother CT electric current at this time；
Condition 3:
(1) I section of bus compound voltage lockout of 110kV is open；
(2) No. 1 power branch breaker incoming relay-protection movements；
(3) No. 1 power branch breakers are in closing position；
(4) section switch is in open position；
(5) No. 2 power branch breakers are in closing position；
When meeting above-mentioned condition 1 or condition 2 or condition 3, bus differential protection action jumps I section of bus breaker and is latched No. 1 electricity simultaneously
Source breaker closing；
2) bus differential protection action, which jumps II section of bus breaker while being latched the control method that No. 2 power circuit breakers close a floodgate, includes:
Condition 1:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the big differential relay movement of the female difference of 110kV；
Condition 2:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) the female poor small differential relay movement of II section of bus of 110kV, disregards segmentation or mother CT electric current at this time；
Condition 3:
(1) II section of bus compound voltage lockout of 110kV is open；
(2) No. 2 power branch breaker incoming relay-protection movements；
(3) No. 1 power branch breakers are in closing position；
(4) section switch is in open position；
(5) No. 2 power branch breakers are in closing position；
When meeting above-mentioned condition 1 or condition 2 or condition 3, bus differential protection action jumps II sections of bus breakers and is latched No. 2 electricity simultaneously
Source breaker closing；
3) bus differential protection action, which jumps section switch while being latched the control method that section switch closes a floodgate, includes:
(1) the big differential relay movement of the female difference of 110kV；
(2) I section of bus compound voltage lockout of 110kV is open or II section of bus compound voltage lockout of 110kV is open；
After above-mentioned condition meets, bus differential protection action jumps section switch and is latched section switch combined floodgate simultaneously.
2. sectionalized single busbar connection 110kV bus differential protection as described in claim 1 is adaptively latched prepared auto restart guard method, feature exists
In outlet protection refers to outlet protection, transformer differential protection and transformer on I section of bus of 110kV on I section of bus of 110kV
The back-up protection of the side 110kV；Outlet protects the outlet protection referred on II section of bus of 110kV, transformer poor on II section of bus of 110kV
Dynamic protection and transformer 110kV side back-up protection.
3. sectionalized single busbar connection 110kV bus differential protection as described in claim 1 is adaptively latched prepared auto restart guard method, feature exists
In, No. 1 power branch breaker incoming relay-protection and No. 2 power branch breaker incoming relay-protections be by phase distance protection,
Ground distance protection, direction zero-sequence current protection are constituted.
4. sectionalized single busbar connection 110kV bus differential protection as described in claim 1 is adaptively latched prepared auto restart guard method, feature exists
In No. 1 power branch breaker incoming relay-protection and No. 2 power branch breaker incoming relay-protections are to be protected by direction phase current
Shield, direction zero-sequence current protection are constituted.
5. sectionalized single busbar connection 110kV bus differential protection as described in claim 1 is adaptively latched prepared auto restart guard method, feature exists
In the directional element of the incoming relay-protection, bus is directed toward by route in direction.
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| CN108281944B (en) * | 2018-03-13 | 2023-11-24 | 中国电建集团北京勘测设计研究院有限公司 | Differential protection connection system suitable for single bus sectionalized wiring and tripping logic method thereof |
| CN109149528B (en) * | 2018-10-10 | 2019-11-19 | 广东电网有限责任公司 | A kind of comprehensive back-up protection method of bus and device |
| CN109739113B (en) * | 2018-12-30 | 2021-06-22 | 国网北京市电力公司 | Control system, method, storage medium, and processor |
| CN109861181B (en) * | 2019-04-02 | 2020-10-16 | 国网江苏省电力有限公司镇江供电分公司 | Relay protection method for eliminating dead zone faults of sectional and bus-coupled circuit breakers |
| CN109861180B (en) * | 2019-04-02 | 2020-10-16 | 国网江苏省电力有限公司镇江供电分公司 | Bus differential protection locking spare power automatic switching protection method for preventing dead zone fault of sectional breaker |
| CN109936121B (en) * | 2019-04-02 | 2020-11-24 | 国网江苏省电力有限公司镇江供电分公司 | 110kV single-bus sectional wiring bus differential protection locking backup power automatic switching protection method |
| CN115118001B (en) * | 2022-07-15 | 2024-08-30 | 国网福建省电力有限公司漳州供电公司 | Locking circuit for preventing spare power automatic switching misoperation and control method thereof |
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| US6330176B1 (en) * | 2000-11-15 | 2001-12-11 | Powerware Corporation | Multi-input power transfer and uninterruptible power supply apparatus and methods of operation thereof |
| CN101425685B (en) * | 2008-08-15 | 2012-04-25 | 国电南瑞科技股份有限公司 | Internal bridge connecting and protection implementing method for linkage standby electricity supply mode |
| CN102684172B (en) * | 2012-05-25 | 2015-01-07 | 许继电气股份有限公司 | Bus differential protection method for realizing sectional dead zone protection based on virtual bus |
| CN106169740B (en) * | 2016-08-29 | 2018-08-31 | 国网江苏省电力公司镇江供电公司 | 110kV single-trunk segmental wiring incoming relay-protections are latched prepared auto restart relay protecting method |
| CN106300282B (en) * | 2016-08-29 | 2018-11-23 | 国网江苏省电力公司镇江供电公司 | Single-trunk segmental wiring 110kV bus differential protection is latched prepared auto restart guard method |
| CN106207982B (en) * | 2016-09-29 | 2018-08-03 | 中车株洲电力机车有限公司 | A kind of electric locomotive and its battery system |
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