CN105896496A - Multi-stage differential protection power distribution automation device employing magnetic-control rapid circuit breaker - Google Patents
Multi-stage differential protection power distribution automation device employing magnetic-control rapid circuit breaker Download PDFInfo
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- CN105896496A CN105896496A CN201610417148.4A CN201610417148A CN105896496A CN 105896496 A CN105896496 A CN 105896496A CN 201610417148 A CN201610417148 A CN 201610417148A CN 105896496 A CN105896496 A CN 105896496A
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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
- H02H7/28—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 meshed systems
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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
- H02H7/30—Staggered disconnection
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Abstract
The invention discloses a multi-stage differential protection power distribution automation device employing a magnetic-control rapid circuit breaker. The multi-stage differential protection power distribution automation device comprises a power distribution network rack system, wherein a power distribution network isolation switch is arranged at a main segment outlet of the power distribution network rack system and is a magnetic-control operation mechanism circuit breaker, a main-line multi-stage segmented circuit breaker is arranged on the power distribution network rack system, an interconnection switch is arranged on the power distribution network rack system, the magnetic-control operation mechanism circuit breaker, the main-line multi-stage segmented circuit breaker and the interconnection switch are electrically connected with the power distribution network rack system, and the power distribution network rack system comprises a looped power distribution network rack and a single-loop power distribution network. In the multi-stage differential protection power distribution automation device employing the magnetic-control rapid circuit breaker, the integral complete fault isolation time is about one third to one fourth of the time of an original system, the power-off area caused by an accident is one second to one third of the region of the original system, and the power supply reliability index of the integral system can be improved by over a half than that of the original system.
Description
Technical field
The present invention relates to a kind of many electrode difference protections power distribution automation using magnetic control fast chopper
Equipment.
Background technology
Electric power energy net system, electric energy sends from power plant, through remote high voltage power transmission, in
What compensate and after conversion links arrival electricity consumption end, by more than 110KV voltage etc. by way of crossing boosting
Level high-pressure system, through transformer station be depressured to close to or up domestic consumer can use medium
(such as electric pressure systems such as 10KV, 20KV and 35KV) after electric pressure system, then pass through
Distribution network transfers electrical energy into electricity consumption user application layer.Along with the modernization of power distribution network is built energetically
If providing the user the system that safe and reliable, power outage is few, power supply reliability is high is
The target that power grid operation administration section is pursued always.
China's town and country distribution network construction at present has overhead transmission line and two kinds of forms of cable run, joins
Electric network has radial and two kinds of grid structures of looped network shape, system to fault diagnosis, location and from
Dynamic isolation has multiple processing method, and the main distribution net equipment related to includes that 10kV is built on stilts and electric
Cable road, ring main unit, switching station, on-pole switch etc..Distribution automation all uses with prison at present
Control be main, monitoring be auxiliary construction mode, distribution running status is monitored and controls, real
The now adjustment to the method for operation, fault automatic location, isolation and service restoration.Currently mainly have
Two kinds of power distribution automation configures, and the first uses voltage-time type feeder automation to join
Put, the rack system such as, the list radiation of aerial cable hybrid network circuit built on stilts in distribution, Single-ring network
In；The supporting distribution power automation terminal of backbone segmentation on-load switch and transformer station wire-outgoing breaker guarantor
Protect, reclosing coordinates, according to distribution power automation terminal its voltage-temporal logic arbitration functions
Realize restoring electricity of Fault Isolation and non-faulting region.The second uses the feedback of voltage-to-current type
Line automation configures, and any one earthed system built on stilts in distribution, aerial cable mixing is (neutral
Point is through small resistor, arc suppression coil or isolated neutral system) list radiation, the rack system such as Single-ring network
In, the supporting distribution power automation terminal of backbone segmentation on-load switch and transformer station wire-outgoing breaker guarantor
Protect, reclosing coordinates, and realizes according to distribution power automation terminal self overcurrent protection and communication function
Restoring electricity of Fault Isolation and non-faulting region.This distribution framework, fault-current protection is pressed
Carrying out configuration protection configuration according to 2～3 grades of differential parameters, transformer station's level Fault Isolation guard time is
0.3s, the distribution one-level switch fault protective separation time is set as 0.15s, and distribution switch is at most
Being configured to two grades, error protection isolation time is set as 0s.
Both power distribution automation control principles, all also exist Distribution Network Frame simple, differential design
Few, voltage-time type distribution network structure Main Basis transforming plant protecting and distribution power automation terminal
The reclosing functional realiey Fault Isolation of automatization, Fault Isolation action needs to weigh through several times
Close detection and isolation fault, cause the vibration that system is unnecessary, negative effect and destructiveness all than
Bigger；Fault Isolation every time, it is big that action relates to power supply area scope, causes power outage region
Extensively, fault-free region time that again restores electricity is long.Voltage-to-current type distribution network structure, main
Being limited by the restriction of currently associated device parameter performance, distribution network structure is relatively simple for structure；
Voltage-to-current type Fault Isolation is differential arrange fewer, general only 2 to 3 grades of system configuration,
Fault Isolation every time, it is big that action also relates to power supply area scope, causes power outage region wide,
Fault-free region time that again restores electricity is long.Said system ruuning situation, directly affects power supply
This leading indicator performance assessment criteria of the power supply reliability of operating administration.
In current distribution is built, judge energy to accurately improve the Fault Isolation of chopper
Power, automated system needs to use electric current electrode difference protection control principle mostly；Automatization terminal is real
Existing electric current electrode difference protection Fault Isolation time such as following formula:
Tz=Tc+Tk
Tc: Intelligent protection controller overcurrent protection fault trip sends the time；Tk: chopper
The fault trip time；
At present general power distribution automation controller overcurrent protection quick-break fault trip movement time
Δ st is 25ms～35ms, the breaker closing time of spring mechanism typically 50ms～80ms with
On, opening time is typically at 40ms～more than 60ms；The newest permanent magnet mechanism circuit-breaker closes a floodgate
Time, opening time was typically at 30ms～more than 50ms typically at 40ms～more than 70ms；Permanent magnetism
Chopper is compared with spring mechanism breaker, and parts are less, and fault rate is relatively low, it is possible to frequently
Numerous operation.To sum up stating data to calculate, it is completely isolated complete that each fault produces fault protection trip
The one-tenth time is it is generally required to about 80ms～120ms.
As transformer station wire-outgoing breaker overcurrent protection operation time limit 0.3s, according to designing skill at present
Art level, the result that segmentation, the configuration of demarcation circuit breaker configure according to following principle is: conventional
Chopper can not meet distribution network systems how differential Space Truss Design requirement.
B) according to current equipment and technology level, following several simple differential rack can only be realized
Design:
1. segmentation, demarcation circuit breaker use operating machine of the spring mechanism circuit-breaker, are only capable of realizing 1 grade
Graded coordination is protected, and i.e. can only arrange 1 grade of section switch or demarcation circuit breaker；
2. section switch uses permanent-magnet operating mechanism chopper, and delineation device uses spring behaviour
Make mechanism's chopper, 1 grade of section switch and 1 grade of demarcation circuit breaker can be set；
3. section switch uses permanent-magnet operating mechanism chopper, delineation device to use permanent magnetism behaviour
Make mechanism's chopper or fuse, 2 grades of section switches and 1 grade of boundary open circuit at most can be set
Device；
Branch boundary circuit breaker and user demarcation open circuit should not be installed on the most same branch line simultaneously
Device.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of overall complete failure isolation time
Time about 1/3 to the 1/4 of original system, the power failure area that accident causes is original system
1/2 to 1/3 region, the power supply reliability index of total system can be promoted half more originally
The above many electrode difference protections power distribution automation equipment using magnetic control fast chopper.
For solving the problems referred to above, the present invention adopts the following technical scheme that
A kind of many electrode difference protections power distribution automation equipment using magnetic control fast chopper, its feature exists
In: including distribution network structure system, the main segmentation outlet of described distribution network structure system sets
Being equipped with distribution disconnecting switch, described distribution disconnecting switch is magnetic control operating mechanism chopper, described
Backbone multistage subsection chopper, described distribution network structure system it is provided with in distribution network structure system
Being provided with interconnection switch on system, described magnetic control operating mechanism chopper, backbone multistage subsection are disconnected
Road device and interconnection switch are electrically connected with each other with distribution network structure system, described distribution network structure system
System includes looped network Distribution Network Frame and single cycle distribution rack.
As preferably, many electrode difference protections power distribution automation of described employing magnetic control fast chopper sets
Standby technology requires: according to original transformer station wire-outgoing breaker overcurrent protection operation time limit be
0.3S is constant, and the time stage difference of each segmented current differential error protection isolation is not according to 0.3S
1/3 or 1/4 calculating configuration original looped network Distribution Network Frame and single cycle distribution network structure are changed
Make.
As preferably, the improvement and design method of described looped network Distribution Network Frame is as follows:
1) within the system, CB belongs to substation exit chopper, and outlet breaker electric current is differential
Fault current action is differential for 0.3s, the existing equipment technical specification of outlet breaker, is joining
Not considering at present in the transformation of net reliability, the most differential parameter appoints the time so using 0.3s
Constant is constant；Looped network branch line 1 is differential by transformer station A-substation exit chopper CB1-distribution
Chopper FB1～FB4 forms；Looped network branch line 2 is by transformer station B-substation exit chopper CB2-
Distribution differential chopper FB5～FB8 forms；LS is interconnection switch.FB1～FB4 is looped network branch line
Four differential choppers of 1, FB5～FB8 is 2 four differential choppers of looped network branch line；
The time parameter of four level difference switches is calculating benchmark, FB1 according to the maximum time limit value of 0.3s
One-level switchs differential time value and is assumed to be 0.25s (should be the 0.3/4s of 3 times), it is contemplated that
Facilitate set of time and management, be 0.20s, FB2 bis-by this one-level parameter adjustment switch time
The level differential time value of switch is assumed to be the differential time value of 0.15s, FB3 three step switch and is assumed to be
0.10s, FB4 level Four switchs differential time stage difference and is assumed to be 0s setting.
2) according to the most general power distribution automation controller overcurrent protection quick-break fault trip
Within movement time, Δ st was 30ms, for the global reliability of distribution network systems, it is contemplated that intelligence
Stable, the reliability service of energy controller and quality assurance, further improve the quick-break of controller
Trip time is risky to the reliability index improving distribution network systems, so during the quick-break of controller
Between just calculate according to 30ms；The closing time of magnetic control operating mechanism chopper less than 25ms with
In, opening time is less than within 15ms；Calculating according to these data, each fault produces
The fault protection trip completely isolated deadline wants about 50ms at least, it is considered to safety coefficient,
Surplus according to 10%～20% considers, Based Intelligent Control with new magnetic control operating mechanism chopper
The Fault Isolation time of device, within 65ms, fully meets the 1/4 time 75ms's of 0.3s
Time value, again smaller than the scope of time value 0.1s of system third level level difference switch, such
Time differential parameter designing will not cause malfunction and the vibration of system.
As preferably, the improvement and design method of described single radial power distribution network frame is as follows:
1) CB1 belongs to substation exit chopper, and the differential fault current of outlet breaker electric current moves
Making differential for 0.3s, the most differential parameter appoints the time constant so using 0.3s constant；This is joined
Planar network architecture mainly has substation exit chopper CB2-segmentation differential chopper FB1～FB3-to demarcate
The part composition such as differential chopper FB4～FB6；The chopper of LS position contact backup power automatic switching function.
The time parameter of three level difference switches is calculating benchmark, FB1 according to the maximum time limit value of 0.3s
One-level switchs differential time value and is assumed to be the differential time value of 0.20s, FB2 and FB4 secondary switch
It is assumed to be the differential time value of 0.15s, FB3 and FB5 three step switch and is assumed to be 0.10s, FB4 tetra-
Level switchs differential time stage difference and is assumed to be 0s setting.
2) according to current controller overcurrent protection quick-break fault trip Δ movement time st it is
30ms；The closing time of magnetic control operating mechanism chopper is less than within 25ms, and opening time is little
Within 15ms；It is minimum that each fault produces the fault protection trip completely isolated deadline
Also wanting about 50ms, it is considered to safety coefficient, the surplus according to 10%～20% considers, magnetic control is grasped
Make mechanism chopper coordinate the Fault Isolation time of intelligent controller within 65ms, the fullest
The time value of the 1/4 time 75ms of foot 0.3s, again smaller than the differential block switch of the system third level
The scope of time value 0.1s, such time, differential parameter designing will not cause the mistake of system
Move and vibration.
As preferably, many electrode difference protections power distribution automation of described employing magnetic control fast chopper sets
For by reducing energization area, improving comprehensive reliability management of power supply operating index, it is specifically square
Method is as follows:
1) such as the new Distribution Network Frame system improved, current failure isolation differential with power supply area with
And power failure range relation is corresponding as it can be seen, in the range of the differential on-off control of distribution network structure final stage
When breaking down, the final stage level difference switch differential defencive function of direct basis electric current realizes in this region
Fault Isolation Fault Isolation, will not relate to non-faulting in the range of the differential on-off control of upper level
The safe power supply in region, during as broken down in intermediate differential scope, this grade of level difference switch is direct
Realizing the Fault Isolation in this region according to the differential defencive function of electric current, little scope uses reclosing
Non-faulting region is restored electricity by function, and accident will not relate to upper level or transformer station's outlet
The action of switch；By the design of multistage differential panel switches, largely reduce transformer station
The action frequency of outlet switch, by each power outage Region control within effective range.
The invention have the benefit that this design uses magnetic control operating mechanism fast chopper
As section switch and the demarcation circuit breaker of distribution network systems rack, how differential main purpose realize
The setting of error protection isolation circuit breakers, realizes electric current electrode difference protection fault according to automatization terminal
Isolation time such as following formula: Tz=Tc+Tk；Tc: Intelligent protection controller overcurrent protection fault is jumped
Lock sends the time；Tk: the circuit breaker failure trip time.
Also according to the most general power distribution automation controller overcurrent protection quick-break fault trip
Movement time, Δ st was 25ms～35ms, and the closing time of magnetic control operating mechanism chopper is less than
Within 25ms, within opening time rises to less than 15ms；Calculate according to above-mentioned data, often
Secondary fault produces the fault protection trip completely isolated deadline, and to be the most also accomplished by 50ms left
Right.It is just that 0.3s calculates, according to according to transformer station's wire-outgoing breaker overcurrent protection operation time limit
New magnetic control operating mechanism chopper, segmentation, the configuration of demarcation circuit breaker configure according to following principle
Design result be:
A) up-to-date magnetic control operating mechanism chopper is used such as segmentation, demarcation circuit breaker, permissible
Realize more than 4 grades differential mating protections, 4 grades of section switches or boundary open circuit i.e. can only be set
Device；
B) up-to-date magnetic control operating mechanism chopper, demarcation circuit breaker are used such as section switch
For operating machine of the spring mechanism circuit-breaker, 3 grades of section switches and 1 grade of demarcation circuit breaker can be set；
C) up-to-date magnetic control operating mechanism chopper, delineation device are used also such as section switch
Use up-to-date magnetic control operating mechanism chopper, 4 grades of section switches and 1 grade at most can be set
Demarcation circuit breaker；
The distribution network structure system of a new generation's magnetic control operating mechanism chopper, overall complete failure every
From the time be original system about 1/3 to 1/4 time, the power failure area that accident causes is
1/2 to 1/3 region of original system, can be by more original for the power supply reliability index of total system
Promote more than half.
Accompanying drawing explanation
Fig. 1 is that a kind of many electrode difference protections distribution using magnetic control fast chopper of the present invention is automatic
Change equipment is improvement and design many based on voltage-to-current type feeder automation of looped network Distribution Network Frame
The circuit structure diagram of the differential configuration design system of level.
Fig. 2 is that a kind of many electrode difference protections distribution using magnetic control fast chopper of the present invention is automatic
Change equipment single radial power distribution network frame improvement and design based on voltage-to-current type feeder automation
Multistage differential configuration design system circuit structure diagram.
Fig. 3 is that a kind of many electrode difference protections distribution using magnetic control fast chopper of the present invention is automatic
The new Distribution Network Frame of change equipment is differential with power supply area and power failure range relation corresponding diagram.
Detailed description of the invention
As shown in Figure 1-2, a kind of many electrode difference protections distribution using magnetic control fast chopper is automatic
Change equipment, it is characterised in that: include distribution network structure system 1, described distribution network structure system
The main segmentation outlet 2 of 1 is provided with distribution disconnecting switch 3, described distribution disconnecting switch 3
For magnetic control operating mechanism chopper 4, described distribution network structure system 1 is provided with backbone many
Level section switch 5, described distribution network structure system 1 is provided with interconnection switch 6, described
Magnetic control operating mechanism chopper 4, backbone multistage subsection chopper 5 and interconnection switch 6 with join
Net Frame of Electric Network system 1 is electrically connected with each other, and described distribution network structure system 1 includes looped network distribution
Rack 7 and single cycle distribution rack 8.
The technology of many electrode difference protections power distribution automation equipment of described employing magnetic control fast chopper
Requirement is: be that 0.3S is constant according to original transformer station wire-outgoing breaker overcurrent protection operation time limit,
The time stage difference of each segmented current differential error protection isolation is not according to the 1/3 or 1/4 of 0.3S
Calculate configuration original looped network Distribution Network Frame and single cycle distribution network structure are transformed.
The improvement and design method of described looped network Distribution Network Frame is as follows:
1) within the system, CB belongs to substation exit chopper, and outlet breaker electric current is differential
Fault current action is differential for 0.3s, the existing equipment technical specification of outlet breaker, is joining
Not considering at present in the transformation of net reliability, the most differential parameter appoints the time so using 0.3s
Constant is constant；Looped network branch line 1 is differential by transformer station A-substation exit chopper CB1-distribution
Chopper FB1～FB4 forms；Looped network branch line 2 is by transformer station B-substation exit chopper CB2-
Distribution differential chopper FB5～FB8 forms；LS is interconnection switch.FB1～FB4 is looped network branch line
Four differential choppers of 1, FB5～FB8 is 2 four differential choppers of looped network branch line；
The time parameter of four level difference switches is calculating benchmark, FB1 according to the maximum time limit value of 0.3s
One-level switchs differential time value and is assumed to be 0.25s (should be the 0.3/4s of 3 times), it is contemplated that
Facilitate set of time and management, be 0.20s, FB2 bis-by this one-level parameter adjustment switch time
The level differential time value of switch is assumed to be the differential time value of 0.15s, FB3 three step switch and is assumed to be
0.10s, FB4 level Four switchs differential time stage difference and is assumed to be 0s setting.
2) according to the most general power distribution automation controller overcurrent protection quick-break fault trip
Within movement time, Δ st was 30ms, for the global reliability of distribution network systems, it is contemplated that intelligence
Stable, the reliability service of energy controller and quality assurance, further improve the quick-break of controller
Trip time is risky to the reliability index improving distribution network systems, so during the quick-break of controller
Between just calculate according to 30ms；The closing time of magnetic control operating mechanism chopper less than 25ms with
In, opening time is less than within 15ms；Calculating according to these data, each fault produces
The fault protection trip completely isolated deadline wants about 50ms at least, it is considered to safety coefficient,
Surplus according to 10%～20% considers, Based Intelligent Control with new magnetic control operating mechanism chopper
The Fault Isolation time of device, within 65ms, fully meets the 1/4 time 75ms's of 0.3s
Time value, again smaller than the scope of time value 0.1s of system third level level difference switch, such
Time differential parameter designing will not cause malfunction and the vibration of system.
The improvement and design method of described single radial power distribution network frame is as follows:
1) CB1 belongs to substation exit chopper, and the differential fault current of outlet breaker electric current moves
Making differential for 0.3s, the most differential parameter appoints the time constant so using 0.3s constant；This is joined
Planar network architecture mainly has substation exit chopper CB2-segmentation differential chopper FB1～FB3-to demarcate
The part composition such as differential chopper FB4～FB6；The chopper of LS position contact backup power automatic switching function.
The time parameter of three level difference switches is calculating benchmark, FB1 according to the maximum time limit value of 0.3s
One-level switchs differential time value and is assumed to be the differential time value of 0.20s, FB2 and FB4 secondary switch
It is assumed to be the differential time value of 0.15s, FB3 and FB5 three step switch and is assumed to be 0.10s, FB4 tetra-
Level switchs differential time stage difference and is assumed to be 0s setting.
2) according to current controller overcurrent protection quick-break fault trip Δ movement time st it is
30ms；The closing time of magnetic control operating mechanism chopper is less than within 25ms, and opening time is little
Within 15ms；It is minimum that each fault produces the fault protection trip completely isolated deadline
Also wanting about 50ms, it is considered to safety coefficient, the surplus according to 10%～20% considers, magnetic control is grasped
Make mechanism chopper coordinate the Fault Isolation time of intelligent controller within 65ms, the fullest
The time value of the 1/4 time 75ms of foot 0.3s, again smaller than the differential block switch of the system third level
The scope of time value 0.1s, such time, differential parameter designing will not cause the mistake of system
Move and vibration.
Many electrode difference protections power distribution automation equipment of described employing magnetic control fast chopper is by contracting
Little energization area, improves comprehensive reliability management of power supply operating index, and its concrete grammar is as follows:
1) such as the new Distribution Network Frame system improved, current failure isolation differential with power supply area with
And power failure range relation is corresponding as it can be seen, in the range of the differential on-off control of distribution network structure final stage
When breaking down, the final stage level difference switch differential defencive function of direct basis electric current realizes in this region
Fault Isolation Fault Isolation, will not relate to non-faulting in the range of the differential on-off control of upper level
The safe power supply in region, during as broken down in intermediate differential scope, this grade of level difference switch is direct
Realizing the Fault Isolation in this region according to the differential defencive function of electric current, little scope uses reclosing
Non-faulting region is restored electricity by function, and accident will not relate to upper level or transformer station's outlet
The action of switch；By the design of multistage differential panel switches, largely reduce transformer station
The action frequency of outlet switch, by each power outage Region control within effective range.
The invention have the benefit that this design uses magnetic control operating mechanism fast chopper
As section switch and the demarcation circuit breaker of distribution network systems rack, how differential main purpose realize
The setting of error protection isolation circuit breakers, realizes electric current electrode difference protection fault according to automatization terminal
Isolation time such as following formula: Tz=Tc+Tk；Tc: Intelligent protection controller overcurrent protection fault is jumped
Lock sends the time；Tk: the circuit breaker failure trip time.
Also according to the most general power distribution automation controller overcurrent protection quick-break fault trip
Movement time, Δ st was 25ms～35ms, and the closing time of magnetic control operating mechanism chopper is less than
Within 25ms, within opening time rises to less than 15ms；Calculate according to above-mentioned data, often
Secondary fault produces the fault protection trip completely isolated deadline, and to be the most also accomplished by 50ms left
Right.It is just that 0.3s calculates, according to according to transformer station's wire-outgoing breaker overcurrent protection operation time limit
New magnetic control operating mechanism chopper, segmentation, the configuration of demarcation circuit breaker configure according to following principle
Design result be:
A) up-to-date magnetic control operating mechanism chopper is used such as segmentation, demarcation circuit breaker, permissible
Realize more than 4 grades differential mating protections, 4 grades of section switches or boundary open circuit i.e. can only be set
Device；
B) up-to-date magnetic control operating mechanism chopper, demarcation circuit breaker are used such as section switch
For operating machine of the spring mechanism circuit-breaker, 3 grades of section switches and 1 grade of demarcation circuit breaker can be set；
C) up-to-date magnetic control operating mechanism chopper, delineation device are used also such as section switch
Use up-to-date magnetic control operating mechanism chopper, 4 grades of section switches and 1 grade at most can be set
Demarcation circuit breaker；
The distribution network structure system of a new generation's magnetic control operating mechanism chopper, overall complete failure every
From the time be original system about 1/3 to 1/4 time, the power failure area that accident causes is
1/2 to 1/3 region of original system, can be by more original for the power supply reliability index of total system
Promote more than half.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is also
It is not limited to this, any change expected without creative work or replacement, all should contain
Within protection scope of the present invention.
Claims (5)
1. using many electrode difference protections power distribution automation equipment of magnetic control fast chopper, its feature exists
In: including distribution network structure system, the main segmentation outlet of described distribution network structure system sets
Being equipped with distribution disconnecting switch, described distribution disconnecting switch is magnetic control operating mechanism chopper, described
Backbone multistage subsection chopper, described distribution network structure system it is provided with in distribution network structure system
Being provided with interconnection switch on system, described magnetic control operating mechanism chopper, backbone multistage subsection are disconnected
Road device and interconnection switch are electrically connected with each other with distribution network structure system, described distribution network structure system
System includes looped network Distribution Network Frame and single cycle distribution rack.
A kind of many electrode difference protections distribution using magnetic control fast chopper the most as claimed in claim 1
Automation equipment, it is characterised in that: many electrode difference protections of described employing magnetic control fast chopper are joined
The technology of electric automation equipment requires: move according to the wire-outgoing breaker overcurrent protection of original transformer station
As time to be limited to 0.3S constant, the time stage difference of each segmented current differential error protection isolation is other
Configure original looped network Distribution Network Frame and single cycle distribution according to 1/3 or 1/4 calculating of 0.3S
Net rack is transformed.
A kind of many electrode difference protections distribution using magnetic control fast chopper the most as claimed in claim 2
Automation equipment, it is characterised in that: the improvement and design method of described looped network Distribution Network Frame is as follows:
1) within the system, CB belongs to substation exit chopper, and outlet breaker electric current is differential
Fault current action is differential for 0.3s, the existing equipment technical specification of outlet breaker, is joining
Not considering at present in the transformation of net reliability, the most differential parameter appoints the time so using 0.3s
Constant is constant；Looped network branch line 1 is differential by transformer station A-substation exit chopper CB1-distribution
Chopper FB1～FB4 forms；Looped network branch line 2 is by transformer station B-substation exit chopper CB2-
Distribution differential chopper FB5～FB8 forms；LS is interconnection switch.FB1～FB4 is looped network branch line
Four differential choppers of 1, FB5～FB8 is 2 four differential choppers of looped network branch line；
The time parameter of four level difference switches is calculating benchmark, FB1 according to the maximum time limit value of 0.3s
One-level switchs differential time value and is assumed to be 0.25s (should be the 0.3/4s of 3 times), it is contemplated that
Facilitate set of time and management, be 0.20s, FB2 bis-by this one-level parameter adjustment switch time
The level differential time value of switch is assumed to be the differential time value of 0.15s, FB3 three step switch and is assumed to be
0.10s, FB4 level Four switchs differential time stage difference and is assumed to be 0s setting.
2) according to the most general power distribution automation controller overcurrent protection quick-break fault trip
Within movement time, Δ st was 30ms, for the global reliability of distribution network systems, it is contemplated that intelligence
Stable, the reliability service of energy controller and quality assurance, further improve the quick-break of controller
Trip time is risky to the reliability index improving distribution network systems, so during the quick-break of controller
Between just calculate according to 30ms；The closing time of magnetic control operating mechanism chopper less than 25ms with
In, opening time is less than within 15ms；Calculating according to these data, each fault produces
The fault protection trip completely isolated deadline wants about 50ms at least, it is considered to safety coefficient,
Surplus according to 10%～20% considers, Based Intelligent Control with new magnetic control operating mechanism chopper
The Fault Isolation time of device, within 65ms, fully meets the 1/4 time 75ms's of 0.3s
Time value, again smaller than the scope of time value 0.1s of system third level level difference switch, such
Time differential parameter designing will not cause malfunction and the vibration of system.
A kind of many electrode difference protections distribution using magnetic control fast chopper the most as claimed in claim 2
Automation equipment, it is characterised in that: the improvement and design method of described single radial power distribution network frame is such as
Under:
1) CB1 belongs to substation exit chopper, and the differential fault current of outlet breaker electric current moves
Making differential for 0.3s, the most differential parameter appoints the time constant so using 0.3s constant；This is joined
Planar network architecture mainly has substation exit chopper CB2-segmentation differential chopper FB1～FB3-to demarcate
The part composition such as differential chopper FB4～FB6；The chopper of LS position contact backup power automatic switching function.
The time parameter of three level difference switches is calculating benchmark, FB1 according to the maximum time limit value of 0.3s
One-level switchs differential time value and is assumed to be the differential time value of 0.20s, FB2 and FB4 secondary switch
It is assumed to be the differential time value of 0.15s, FB3 and FB5 three step switch and is assumed to be 0.10s, FB4 tetra-
Level switchs differential time stage difference and is assumed to be 0s setting.
2) according to current controller overcurrent protection quick-break fault trip Δ movement time st it is
30ms；The closing time of magnetic control operating mechanism chopper is less than within 25ms, and opening time is little
Within 15ms；It is minimum that each fault produces the fault protection trip completely isolated deadline
Also wanting about 50ms, it is considered to safety coefficient, the surplus according to 10%～20% considers, magnetic control is grasped
Make mechanism chopper coordinate the Fault Isolation time of intelligent controller within 65ms, the fullest
The time value of the 1/4 time 75ms of foot 0.3s, again smaller than the differential block switch of the system third level
The scope of time value 0.1s, such time, differential parameter designing will not cause the mistake of system
Move and vibration.
A kind of many electrode difference protections distribution using magnetic control fast chopper the most as claimed in claim 2
Automation equipment, it is characterised in that: many electrode difference protections of described employing magnetic control fast chopper are joined
Electric automation equipment, by reducing energization area, improves the operation of comprehensive reliability management of power supply and refers to
Mark, its concrete grammar is as follows:
1) such as the new Distribution Network Frame system improved, current failure isolation differential with power supply area with
And power failure range relation is corresponding as it can be seen, in the range of the differential on-off control of distribution network structure final stage
When breaking down, the final stage level difference switch differential defencive function of direct basis electric current realizes in this region
Fault Isolation Fault Isolation, will not relate to non-faulting in the range of the differential on-off control of upper level
The safe power supply in region, during as broken down in intermediate differential scope, this grade of level difference switch is direct
Realizing the Fault Isolation in this region according to the differential defencive function of electric current, little scope uses reclosing
Non-faulting region is restored electricity by function, and accident will not relate to upper level or transformer station's outlet
The action of switch；By the design of multistage differential panel switches, largely reduce transformer station
The action frequency of outlet switch, by each power outage Region control within effective range.
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