CN107317308A - The adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections - Google Patents
The adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections Download PDFInfo
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- CN107317308A CN107317308A CN201710631708.0A CN201710631708A CN107317308A CN 107317308 A CN107317308 A CN 107317308A CN 201710631708 A CN201710631708 A CN 201710631708A CN 107317308 A CN107317308 A CN 107317308A
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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 adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections; applied to 110kV sectionalized single busbar connection primary connection circuit grids, including 1), bus bar differential prptection operation jumps the control method that I section of bus breaker No. 1 power circuit breaker of locking simultaneously closes a floodgate；2) bus bar differential prptection operation jumps the control method that II section of bus breaker No. 2 power circuit breakers of locking simultaneously close a floodgate；3) bus bar differential prptection operation jumps the section switch control method that locking section switch closes a floodgate simultaneously.The present invention is acted to 110kV bus-bar fault correct operation lockings prepared auto restart under the various methods of operation and closed a floodgate, and prevents prepared auto restart by mistake from throwing on faulty equipment, to be 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 technology
At present because single-trunk segmental wiring 110kV electric substations do not install special 110kV bus differential protectings, so
Protect (referred to as standby come locking 110kV automatic throw-in equipment of emergency power supplies as 110kV bus protections using 110kV electric power incoming lines
Haul oneself willingly into).There is problems with 110kV electric power incoming line protection blocking 110kV prepared auto restart schemes：1. for I section of bus of 110kV or
When II section of bus of 110kV has outlet circuit, in outlet line failure, the protection protection of 110kV electric power incoming lines can not judge
It is 110kV line faults or 110kV bus-bar faults；2. when two bus runs of electric power incoming line band all the way, in any bus
The protection of 110kV electric power incoming lines 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 the insoluble problems that 110kV electric power incoming line protection blocking 110kV prepared auto restarts are present, and are used
110kV bus differential protection locking prepared auto restarts can overcome above mentioned problem.But installed in the 110kV electric substations of single-trunk segmental wiring
After 110kV bus differential protections, how locking prepared auto restart, be the new problem that relay protection staff faces.
The content of the invention
It is an object of the invention to provide a kind of adaptive locking prepared auto restart protection side of sectionalized single busbar connection 110kV bus differential protections
How method, applied to transmission and distribution networkses, after the 110kV electric substations installing 110kV bus differential protections for solving single-trunk segmental wiring, close
Lock the technical problem of prepared auto restart.
The purpose of the present invention is achieved by the following technical programs：
A kind of adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, applied to 110kV single busbars
Primary connection circuit grid is segmented, the adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections is：
1. the control method that bus bar differential prptection operation jumps No. 1 power circuit breaker combined floodgate of I section of bus breaker locking simultaneously includes：
1.1 conditions 1：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) the big differential relay action of the female differences of 110kV；
After above-mentioned condition is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed
Lock；
1.2 conditions 2：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) the female poor small differential relay actions of I section of bus of 110kV, now disregard segmentation or mother CT electric currents；
After above-mentioned condition is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed
Lock；
1.3 conditions 3：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) No. 1 power branch breaker incoming relay-protection actions；
(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 is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed
Lock；
2. bus bar differential prptection operation jumps the control method bag that II section of bus breaker No. 2 power circuit breakers of locking simultaneously close a floodgate
Include：
2.1 conditions 1：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) the big differential relay action of the female differences of 110kV；
After above-mentioned condition is satisfied by, bus bar differential prptection operation jumps II section of bus breaker No. 2 power circuit breakers of locking simultaneously
Close a floodgate；
2.2 conditions 2：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) the female poor small differential relay actions of II section of bus of 110kV, now disregard segmentation or mother CT electric currents；
After above-mentioned condition is satisfied by, bus bar differential prptection operation jumps II section of bus breaker No. 2 power circuit breakers of locking simultaneously
Close a floodgate；
2.3 conditions 3：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) No. 2 power branch breaker incoming relay-protection actions；
(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 is met, bus bar differential prptection operation is jumped I section of bus breaker No. 2 power circuit breakers of locking simultaneously and closed
Lock；
3. bus bar differential prptection operation, which jumps the section switch control method that locking section switch closes a floodgate simultaneously, to be included：
(1) the big differential relay action of the female differences of 110kV；
(2) I section of bus compound voltage lockout of 110kV is opened or II section of bus compound voltage lockout of 110kV is opened；
After above-mentioned condition is met, bus bar differential prptection operation jumps section switch, and locking section switch closes a floodgate simultaneously.
The purpose of the present invention can also further be realized by following technical measures：
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, wherein I section of bus of 110kV
Upper outlet protection refers to outlet protection, transformer differential protection and transformer 110kV side back-up protections on I section of bus of 110kV；
Outlet protection refers to outlet protection, transformer differential protection and the transformer on II section of bus of 110kV on II section of bus of 110kV
The back-up protection of 110kV sides.
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, wherein No. 1 electric power incoming line is protected
Shield and No. 2 electric power incoming lines are protected to be made up of phase distance protection, ground distance protection, direction zero-sequence current protection.
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, wherein No. 1 electric power incoming line is protected
Shield and No. 2 electric power incoming line protections are by direction phase current is protected, direction zero-sequence current protection is constituted.
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, the wherein side of incoming relay-protection
To element, bus is pointed in its direction by circuit.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the scheme of the electric substation 110kV bus differential protection locking prepared auto restarts of the present invention can be right under the various methods of operation
The action of 110kV bus-bar fault correct operation lockings prepared auto restart is closed a floodgate, and prevents prepared auto restart by mistake from throwing on faulty equipment, to be conducive to electricity
Net safe and stable operation.
2. the scheme of the electric substation 110kV bus differential protection locking prepared auto restarts of the present invention is under the various methods of operation, in 110kV
During outlet failure, it the action of locking prepared auto restart can not close a floodgate by mistake, improve power network power supply reliability.
3. the scheme of the electric substation 110kV bus differential protection locking prepared auto restarts of the present invention, logic is simple and easy to apply.
4. technical solution of the present invention can be used：
(1) there was only that the female poor branch road of two power supplys has power supply and outlet branch road, transformer branch do not have the situation of power supply；
The female poor branch road of (2) two power supplys has power supply, and outlet branch road, transformer branch also have the situation of power supply.
Brief description of the drawings
Fig. 1 is 110kV bus differential protecting locking prepared auto restart schematic diagrams；
Fig. 2 is 110kV electric substations sectionalized single busbar connection primary connection circuit figure；
Fig. 3 is 220kV electric substations 110kV double-bus (sectionalized single busbar connection) primary connection circuit figure；
Symbol description is as follows in Fig. 1：
- representing logical AND relation, i.e., when input condition is all met, output is effective；
- representing logic or relation, i.e. input condition are any when meeting, output is effective.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, the work of the adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections of the present invention
It is as principle：
1. the control method that bus bar differential prptection operation jumps No. 1 power circuit breaker combined floodgate of I section of bus breaker locking simultaneously includes：
1.1 conditions 1：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) the big differential relay action of the female differences of 110kV；
After above-mentioned condition is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed
Lock；
1.2 conditions 2：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) the female poor small differential relay actions of I section of bus of 110kV, now disregard segmentation or mother CT electric currents；
After above-mentioned condition is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed
Lock；
1.3 conditions 3：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) No. 1 power branch breaker incoming relay-protection actions；
(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 is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed
Lock；
2. bus bar differential prptection operation jumps the control method bag that II section of bus breaker No. 2 power circuit breakers of locking simultaneously close a floodgate
Include：
2.1 conditions 1：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) the big differential relay action of the female differences of 110kV；
After above-mentioned condition is satisfied by, bus bar differential prptection operation jumps II section of bus breaker No. 2 power circuit breakers of locking simultaneously
Close a floodgate；
2.2 conditions 2：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) the female poor small differential relay actions of II section of bus of 110kV, now disregard segmentation or mother CT electric currents；
After above-mentioned condition is satisfied by, bus bar differential prptection operation jumps II section of bus breaker No. 2 power circuit breakers of locking simultaneously
Close a floodgate；
2.3 conditions 3：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) No. 2 power branch breaker incoming relay-protection actions；
(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 is met, bus bar differential prptection operation is jumped I section of bus breaker No. 2 power circuit breakers of locking simultaneously and closed
Lock；
3. bus bar differential prptection operation, which jumps the section switch control method that locking section switch closes a floodgate simultaneously, to be included：
(1) the big differential relay action of the female differences of 110kV；
(2) I section of bus compound voltage lockout of 110kV is opened or II section of bus compound voltage lockout of 110kV is opened；
After above-mentioned condition is met, bus bar differential prptection operation jumps section switch, and locking section switch closes a floodgate simultaneously.
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, wherein I section of bus of 110kV
Upper outlet protection refers to outlet protection, transformer differential protection and transformer 110kV side back-up protections on I section of bus of 110kV；
Outlet protection refers to outlet protection, transformer differential protection and the transformer on II section of bus of 110kV on II section of bus of 110kV
The back-up protection of 110kV sides.
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, wherein No. 1 electric power incoming line is protected
Shield and No. 2 electric power incoming lines are protected to be made up of phase distance protection, ground distance protection, direction zero-sequence current protection.Or, 1
The protection of number electric power incoming line and No. 2 electric power incoming lines protections are to be made up of the protection of direction phase current, direction zero-sequence current protection.
The foregoing adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, the wherein side of incoming relay-protection
To element, bus is pointed in its direction by circuit.
The transmission and distribution networkses that the method for the present invention is applied meet following primary connection circuit：
(1) 110kV electric substations 110kV sectionalized single busbar connection primary connection circuits；
(2) 220kV electric substations 110kV double-bus primary connection circuits；
(3) 220kV electric substations 110kV sectionalized single busbar connection primary connection circuits.
As shown in Fig. 2 110kV electric substations 110kV sectionalized single busbar connection primary connection circuits include：No. 1 electric power incoming line branch road
Equipment, No. 2 electric power incoming line branch equipments connect I section of bus of 110kV, II section of bus of 110kV respectively；I section of bus of 110kV and II section
There is section switch between bus, and be serially connected with segmented current transformer (abbreviation CT)；No. 1 electric power incoming line branch road spacing devices, 2
Number electric power incoming line branch road 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 outlets branch road and 110kV voltage transformers (abbreviation PT), can also have
110kV bus arresters；II section of bus of 110kV is further connected with No. 3 transformer branches, No. 2 110kV outlets branch roads and 110kV PT,
There can also be 110kV bus arresters.
Fig. 3 is 220kV electric substations 110kV double-bus (sectionalized single busbar connection) primary connection circuit figure；Power branch open circuit in Fig. 3
Device connection is 220kV transformers, and 110kV outlet branch roads are directly to be connected to 110kV transformers by 110kV circuits.
For above-mentioned 110kV sectionalized single busbar connections primary connection circuit, because the 110kV side bus of configuration is protected, electricity is employed
Bus-bar fault lock-out scheme of the female poor breaker protection in source to 110kV prepared auto restarts.
The embodiment of the inventive method 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
1.1110kV I section of bus-bar fault
Because 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 action of No. 1 power supply, I section of bus of 110kV is taken no account of point
The small differential relay of section electric current starts, the big differential relay of the female differences of 110kV starts, I section of bus compound voltage lockout bar of 110kV
Part is opened, and bus bar differential prptection operation jumps I section of bus breaker, and locking section switch closes a floodgate simultaneously.
1.2110kV II section of bus-bar fault
Because 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 action of No. 2 power supplys, II section of bus of 110kV is taken no account of
The small differential relay of segmented current starts, the big differential relay of the female differences of 110kV starts, II section of bus compound electric of 110kV is pressed off
Bolt part is opened, and bus bar differential prptection operation jumps II section of bus breaker, and locking section switch closes a floodgate simultaneously.
Outlet line fault on I section of bus of 1.3110kV
Because 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 circuit (or transformer) failure on I section of bus of 110kV, the big differential relay of 110kV bus differential protections is reflected as
External area error, therefore will not locking 110kV prepared auto restarts so will not start.
Outlet line fault on II section of bus of 1.4110kV
Because 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 circuit (or transformer) failure on II section of bus of 110kV, the big differential relay reflection of 110kV bus differential protections
For external area error so will not start, therefore will not locking 110kV prepared auto restarts.
Broken down between 1.5 section switches and segmentation CT
Because No. 1 power circuit breaker, No. 2 power circuit breaker operations, section switch stand-by heat, i.e. section switch separating brake
Position.Broken down when between section switch and segmentation CT, because segmentation CT is located at I section of bus bar side of 110kV, equivalent to
I section of bus-bar fault of 110kV, although the I sections of small differential relays of bus do not start, but the big differential relay startup of the female differences of 110kV,
I section of bus compound voltage lockout condition of 110kV is opened, therefore starts the locking simultaneously of I section of bus breaker of bus bar differential prptection operation jump
Section switch closes a floodgate.
No. 2.1 power circuit breakers, section switch operations, No. 2 power circuit breaker stand-by heats
2.1110kV I section of bus-bar fault
Because No. 1 power circuit breaker, section switch operation, 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 starts, I section of bus compound voltage lockout condition of 110kV and II section of bus compound voltage lockout condition are opened
Put, bus bar differential prptection operation is jumped I section of bus breaker, II section of bus breaker and section switch and closed a floodgate, while No. 1 power supply of locking
Branch breaker, No. 2 power branch breakers and section switch close a floodgate.
2.2110kV II section of bus-bar fault
Because No. 1 power circuit breaker, section switch operation, 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, small differential relay, the 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 opened, and bus bar differential prptection operation jumps II section of bus
Breaker and section switch close a floodgate, while No. 2 power branch breakers of locking and section switch close a floodgate.
Outlet line fault on I section of bus of 2.3110kV
Because No. 1 power circuit breaker, section switch operation, No. 2 power circuit breaker stand-by heats, i.e., No. 2 power circuit breakers
Open position.When outlet circuit (or transformer) failure on I section of bus of 110kV, the big differential relay of 110kV bus differential protections is anti-
To reflect will not start for external area error is all, therefore will not locking 110kV prepared auto restarts.
Outlet line fault on II section of bus of 2.4110kV
Because No. 1 power circuit breaker, section switch operation, No. 2 power circuit breaker stand-by heats, i.e., No. 2 power circuit breakers
Open position.When outlet circuit (or transformer) failure on II section of bus of 110kV, the big differential relay of 110kV bus differential protections
External area error is reflected as so will not start, therefore will not locking 110kV prepared auto restarts.
Broken down between 2.5 section switches and segmentation CT
Because No. 1 power circuit breaker, section switch operation, No. 2 power circuit breaker stand-by heats, i.e., No. 2 power circuit breakers
Open position.Broken down when between section switch and segmentation CT, because segmentation CT is located at I section of bus bar side of 110kV, 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
Device starts, II section of bus compound voltage lockout condition of 110kV is opened, and bus bar differential prptection operation jumps II section of bus breaker and segmentation is disconnected
Road device, while locking prepared auto restart starts the combined floodgate of No. 2 power circuit breakers.Simultaneously as the big differential relay of the female differences of 110kV is opened
Dynamic, I section of bus compound voltage lockout condition of 110kV is opened, and bus bar differential prptection operation jumps I section of bus breaker, while locking is standby certainly
Throw the combined floodgate for starting No. 1 power circuit breaker.To sum up, this result is jumped I section of bus breaker, II section of bus for bus bar differential prptection operation and broken
Road device and section switch, while No. 1 power circuit breaker of locking, No. 2 power circuit breakers and section switch close a floodgate.
No. 3.2 power circuit breakers, section switch operations, No. 1 power circuit breaker stand-by heat
3.1110kV I section of bus-bar fault
Because No. 2 power circuit breakers, section switch operations, 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 starts, I section of bus compound voltage lockout condition of 110kV and II section of bus compound voltage lockout condition are opened
Put, bus bar differential prptection operation is jumped I section of bus breaker, II section of bus breaker and section switch and closed a floodgate, while No. 1 power supply of locking
Branch breaker, No. 2 power branch breakers and section switch close a floodgate.
3.2110kV II section of bus-bar fault
Because No. 2 power circuit breakers, section switch operations, 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, small differential relay, the 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
Put, bus bar differential prptection operation is jumped I section of bus breaker, II section of bus breaker and section switch and closed a floodgate, while No. 1 power supply of locking
Branch breaker, No. 2 power branch breakers and section switch close a floodgate.
Outlet line fault on I section of bus of 3.3110kV
Because No. 2 power circuit breakers, section switch operations, No. 1 power circuit breaker stand-by heat, i.e., No. 1 power circuit breaker
Open position.When outlet circuit (or transformer) failure on I section of bus of 110kV, the big differential relay of 110kV bus differential protections is anti-
Reflecting will not start for external area error is all, therefore will not locking 110kV prepared auto restarts.
Outlet line fault on II section of bus of 3.4110kV
Because No. 2 power circuit breakers, section switch operations, No. 1 power circuit breaker stand-by heat, i.e., No. 1 power circuit breaker
Open position.When outlet circuit (or transformer) failure on II section of bus of 110kV, the big differential relay of 110kV bus differential protections
External area error is reflected as so will not start, therefore will not locking 110kV prepared auto restarts.
Broken down between 3.5 section switches and segmentation CT
Because No. 2 power circuit breakers, section switch operations, No. 1 power circuit breaker stand-by heat, i.e., No. 1 power circuit breaker
Open position.Broken down when between section switch and segmentation CT, because segmentation CT is located at I section of bus bar side of 110kV, 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
Device starts, II section of bus compound voltage lockout condition of 110kV is opened, and bus bar differential prptection operation jumps II section of bus breaker and segmentation is disconnected
Road device, while locking prepared auto restart starts the combined floodgate of No. 2 power circuit breakers.Simultaneously as the big differential relay of the female differences of 110kV is opened
Dynamic, I section of bus compound voltage lockout condition of 110kV is opened, and bus bar differential prptection operation jumps I section of bus breaker, while locking is standby certainly
Throw the combined floodgate for starting No. 1 power circuit breaker.To sum up, this result is jumped I section of bus breaker, II section of bus for bus bar differential prptection operation and broken
Road device and section switch, while No. 1 power circuit breaker of locking, No. 2 power circuit breakers and section switch close a floodgate.
In addition to the implementation, the present invention can also have other embodiment, all use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (5)
1. a kind of adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections, applied to 110kV single busbars point
Section primary connection circuit grid, it is characterised in that the adaptive locking prepared auto restart protection side of sectionalized single busbar connection 110kV bus differential protections
Method is：
1) bus bar differential prptection operation jumps I section of bus breaker while the control method that No. 1 power circuit breaker of locking closes a floodgate includes：
Condition 1：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) the big differential relay action of the female differences of 110kV；
After above-mentioned condition is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed a floodgate；
Condition 2：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) the female poor small differential relay actions of I section of bus of 110kV, now disregard segmentation or mother CT electric currents；
After above-mentioned condition is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed a floodgate；
Condition 3：
(1) I section of bus compound voltage lockout of 110kV is opened；
(2) No. 1 power branch breaker incoming relay-protection actions；
(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 is met, bus bar differential prptection operation is jumped I section of bus breaker No. 1 power circuit breaker of locking simultaneously and closed a floodgate；
2) bus bar differential prptection operation jumps II section of bus breaker while the control method that No. 2 power circuit breakers of locking close a floodgate includes：
Condition 1：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) the big differential relay action of the female differences of 110kV；
After above-mentioned condition is satisfied by, bus bar differential prptection operation is jumped II section of bus breaker No. 2 power circuit breakers of locking simultaneously and closed a floodgate；
Condition 2：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) the female poor small differential relay actions of II section of bus of 110kV, now disregard segmentation or mother CT electric currents；
After above-mentioned condition is satisfied by, bus bar differential prptection operation is jumped II section of bus breaker No. 2 power circuit breakers of locking simultaneously and closed a floodgate；
Condition 3：
(1) II section of bus compound voltage lockout of 110kV is opened；
(2) No. 2 power branch breaker incoming relay-protection actions；
(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 is met, bus bar differential prptection operation is jumped I section of bus breaker No. 2 power circuit breakers of locking simultaneously and closed a floodgate；
3) bus bar differential prptection operation is jumped the section switch control method that locking section switch closes a floodgate simultaneously and included：
(1) the big differential relay action of the female differences of 110kV；
(2) I section of bus compound voltage lockout of 110kV is opened or II section of bus compound voltage lockout of 110kV is opened；
After above-mentioned condition is met, bus bar differential prptection operation jumps section switch, and locking section switch closes a floodgate simultaneously.
2. the adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections as claimed in claim 1, its feature exists
In outlet protection refers to outlet protection, transformer differential protection and the change on I section of bus of 110kV on described I section of bus of 110kV
Depressor 110kV side back-up protections；The outlet protection referred on II section of bus of 110kV, transformation are protected in outlet on II section of bus of 110kV
Device differential protection and transformer 110kV side back-up protections.
3. the adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections as claimed in claim 1, its feature exists
In No. 1 electric power incoming line protection and No. 2 electric power incoming line protections are by phase distance protection, ground distance protection, direction zero sequence
Current protection is constituted.
4. the adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections as claimed in claim 1, its feature exists
In No. 1 electric power incoming line protection and No. 2 electric power incoming line protections are by the protection of direction phase current, direction zero-sequence current protection structure
Into.
5. the adaptive locking prepared auto restart guard method of sectionalized single busbar connection 110kV bus differential protections as claimed in claim 1, its feature exists
In bus is pointed in the directional element of the incoming relay-protection, its direction by circuit.
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