CN107465177B - A kind of power distribution network small current grounding fault partition method based on regional agency - Google Patents
A kind of power distribution network small current grounding fault partition method based on regional agency Download PDFInfo
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- CN107465177B CN107465177B CN201710941201.5A CN201710941201A CN107465177B CN 107465177 B CN107465177 B CN 107465177B CN 201710941201 A CN201710941201 A CN 201710941201A CN 107465177 B CN107465177 B CN 107465177B
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005192 partition Methods 0.000 title claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 84
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims abstract description 5
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 230000001052 transient effect Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000011218 segmentation Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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Classifications
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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
Abstract
A kind of power distribution network small current grounding fault partition method based on regional agency, belongs to Distribution Automation Technology field.Include the following steps: step a, sets agent territory and regional agency terminal；Step b, the fault actions time switched in Configuration Agent region；Step c judges whether small current grounding fault occurs in power distribution network；Step d, the switch time delay positioned at fault point upstream act；Step e realizes the isolation of fault point；Step f determines the interconnection switch of needs movement and the interconnection switch that closes a floodgate；Step g updates the topological network of power distribution network；Step h reconfigures the fault actions time of line switching in agent territory.It relies solely on local amount independent of communication and main station system by setting agent territory and regional agency terminal based on the power distribution network small current grounding fault partition method of regional agency and realizes small current grounding fault isolation, reliability is higher.
Description
Technical field
A kind of power distribution network small current grounding fault partition method based on regional agency belongs to Distribution Automation Technology neck
Domain.
Background technique
Currently, the protection seting of power distribution network relay and configuration are not perfect, especially in small current neutral grounding system, lack at present
Few reliable small current grounding fault protective separation method.In the prior art, it relies primarily on power distribution automation and realizes that failure is fixed
Position and restores electricity at Fault Isolation, power distribution automation is high by communication network failure rate, the backup power supply service life is short, management service with
Not first-class factor influences, and actual motion effect is undesirable.
Summary of the invention
The technical problem to be solved by the present invention is overcoming the deficiencies of the prior art and provide a kind of by setting agent territory
And regional agency terminal relies solely on local amount and realizes small current grounding fault isolation independent of communication and main station system,
The higher power distribution network small current grounding fault partition method based on regional agency of reliability.
The technical solution adopted by the present invention to solve the technical problems is: being somebody's turn to do the power distribution network low current based on regional agency and connects
Earth fault partition method is equipped with multiple power supplys in power distribution network, is provided with outlet switch in the power output end of each power supply, if
It is equipped with the interconnection switch that multiple reset conditions are in quartile, interconnection switch is isolated by two adjacent outlet switchs, is being gone out
Several line switchings are additionally provided between wiretap and interconnection switch, small current grounding fault betides any position of power distribution network
It sets, characterized by the following steps:
The power distribution network is divided into multiple agent territories by step a, and a region is set in each agent territory
Proxy terminal；
Step b, the fault actions time of outlet switch and line switching in Configuration Agent region；
Step c judges whether small current grounding fault occurs in power distribution network；If small current grounding fault does not occur,
Circulation executes this step, in case of small current grounding fault, executes step d；
Step d is located at after small current grounding fault occurs in route by what abort situation judgment basis judged
When the outlet switch or line switching of fault point upstream, outlet switch or line switching are according to the fault actions configured in step b
Between deferred action；
Step e, the line switching separating brake of regional agency terminal control trouble point downstream, realizes the isolation of fault point；
Step f determines the interconnection switch of needs movement and the interconnection switch that closes a floodgate；
Step g updates the topological network of power distribution network；
Step h reconfigures the fault actions time of line switching in agent territory.
Preferably, in the step a, area is acted on behalf of for described in the land between outlet switch and interconnection switch
Domain, outlet switch itself are used as the regional agency terminal in agent territory.
Preferably, in the step b, the setting principle of fault actions time are as follows: be located at main line in agent territory
On line switching, successively shorten by the fault actions time of starting point line switching downstream of outlet switch, and outlet switch
Itself participates in the configuration of fault actions time, and interconnection switch itself is not involved in the configuration of fault actions time, is connected to main line
On branched line switch the fault actions time be less than main line on any one line switching the fault actions time.
Preferably, the line switching is that the ring network cabinet of ring network cabinet in the block switch or cable run in overhead line is opened
It closes.
Preferably, the outlet switch, interconnection switch and line switching use can detect zero-sequence current and zero simultaneously
The integral switch of sequence voltage.
Preferably, abort situation judgment basis described in step d are as follows: the transient reactive power of fault point upstream is negative,
The transient reactive power of trouble point downstream is positive.
Preferably, in step c using transient reactive power method to whether the small current grounding fault occur sentencing
It is disconnected.
Preferably, the determination basis for the interconnection switch for needing to act described in step f are as follows: with generation small current grounding fault
The adjacent interconnection switch in agent territory in the maximum interconnection switch of spare capacity be needs movement interconnection switch.
Compared with prior art, the present invention has the beneficial effects that
1, pass through setting agent territory and area based on the power distribution network small current grounding fault partition method of regional agency
Domain proxy terminal relies solely on local amount and realizes small current grounding fault isolation, reliability independent of communication and main station system
It is higher.
2, in the power distribution network small current grounding fault partition method based on regional agency, prison in real time is realized using communication
The displacement information for surveying all switches in topology carries out the real-time update of topology when topological structure changes, according to real-time topology knot
Structure adjusts action delay, ensure that the quick-action and selectivity of protection.Regional agency equipment is according to all information acquisitions of return
Feeder line real-time topology, it is reliable and stable.
3, can real-time query network topology structure, according to different topology use different failure delay times, strong applicability.
4, regional agency terminal is allocated to each switch fault-motion time, and adaptability is wide.
5, regional agency equipment detection switch conjugates information, when having change, is transmitted to main website, prevents from reporting by mistake.
6, after line failure, switch cooperation trip operation cuts off fault section, and interconnection switch interoperation is realized
Fault section isolation, switch trip movement excision failure, regional agency equipment generate new according to the breakdown switch position of system
Topological structure, configures the suitable switch time delay time, restores fault section power supply, avoid power distribution network is caused it is more serious
Loss.Using the method for regional agency device configuration switch motion time, it is remarkably improved power supply reliability.
Detailed description of the invention
Fig. 1 is the power distribution network small current grounding fault partition method flow chart based on regional agency.
Fig. 2 is the power distribution network small current grounding fault partition method overhead line schematic network structure based on regional agency.
Aerial gauze when Fig. 3 is power distribution network small current grounding fault partition method 1 failure of embodiment based on regional agency
Network structural schematic diagram.
Fig. 4 is overhead line net after 1 failure of power distribution network small current grounding fault partition method embodiment based on regional agency
Network structural schematic diagram.
Aerial gauze when Fig. 5 is power distribution network small current grounding fault partition method 2 failure of embodiment based on regional agency
Network structural schematic diagram.
Fig. 6 is overhead line net after 2 failure of power distribution network small current grounding fault partition method embodiment based on regional agency
Network structural schematic diagram.
Aerial gauze when Fig. 7 is power distribution network small current grounding fault partition method 3 failure of embodiment based on regional agency
Network structural schematic diagram.
Fig. 8 is overhead line net after 3 failure of power distribution network small current grounding fault partition method embodiment based on regional agency
Network structural schematic diagram.
Fig. 9 is that the 4 cable system structure of power distribution network small current grounding fault partition method embodiment based on regional agency is shown
It is intended to.
When Figure 10 is the power distribution network small current grounding fault partition method 4 cable system failure of embodiment based on regional agency
Structural schematic diagram.
When Figure 11 is the power distribution network small current grounding fault partition method 5 cable system failure of embodiment based on regional agency
Structural schematic diagram.
When Figure 12 is the power distribution network small current grounding fault partition method 6 cable system failure of embodiment based on regional agency
Structural schematic diagram.
Specific embodiment
Fig. 1 ~ 4 are highly preferred embodiment of the present invention, and 1 ~ 12 the present invention will be further described with reference to the accompanying drawing.
Embodiment 1:
As shown in Figure 1, a kind of power distribution network small current grounding fault partition method based on regional agency, including walk as follows
It is rapid:
Step 1001, setting area proxy terminal and agent territory is divided；
In the present embodiment, by taking overhead line network as an example, three electricity are provided in overhead line network as shown in Figure 2
Source: power supply T1, power supply T2 and power supply T3 are additionally provided with power outlet switch: outlet switch QS1 ~ outlet switch QS3, outlet
Switch QS1 ~ outlet switch QS3 is correspondingly connected with power supply T1, power supply T2 and power supply T3 respectively.In outlet switch QS1 and outlet
Once there are five block switches for connection between switch QS2: block switch Q1 ~ block switch Q5, wherein block switch Q3 is defined as
Interconnection switch.Outlet switch QS3 leading-out terminal is sequentially connected there are five block switch: block switch Q12 ~ block switch Q8, wherein
Block switch Q8 is connected between block switch Q2 ~ block switch Q3, and block switch Q10 is defined as interconnection switch.It is opened in segmentation
It closes and opens between Q1 and block switch Q2 and be parallel with block switch Q6, open and be parallel with point between interconnection switch Q3 and block switch Q4
Duan Kaiguan Q7.Block switch and interconnection switch are all made of while the integral switch of detectable zero-sequence current and residual voltage is real
It is existing.
In Fig. 2, white box body surface shows that the switch in quartile, black box body surface show the switch in coincidence.
The outlet switch connected to power supply is defined as regional agency terminal, and using interconnection switch as boundary, by interconnection switch
The agent territory that region between adjacent regional agency terminal is acted on behalf of as the regional agency terminal, interconnection switch can be drawn
Enter in any one agent territory.
In conjunction with Fig. 2, wherein outlet switch QS1 ~ outlet switch QS3 is respectively defined as regional agency terminal, wherein outlet
The agent territory that switch QS1 is acted on behalf of includes: block switch Q1, block switch Q2, block switch Q6, block switch Q8 and divides
Duan Kaiguan Q9 and interconnection switch Q3 and interconnection switch Q10；The agent territory that outlet switch QS3 is acted on behalf of includes: block switch
Q11 ~ block switch Q13；The agent territory that outlet switch QS2 is acted on behalf of includes: block switch Q4, block switch Q5, is segmented and opens
Close Q7 and block switch Q13.
Step 1002, the fault actions time switched in Configuration Agent region；
The fault actions time of main line upper switch in each agent territory is set, and the setting of fault actions time is former
Then are as follows: in the agent territory between outlet switch and interconnection switch be located at main line on switch, using outlet switch as starting point its
The fault actions time of the switch in downstream successively shortens, and outlet switch itself participates in the configuration of fault actions time, and contact is opened
The configuration for being not involved in the fault actions time in itself is closed, the fault actions time for the branched line switch being connected on main line is less than
The fault actions time of any one line switching on main line.
In conjunction with Fig. 2, the agent territory that outlet switch QS1 is acted on behalf of includes: block switch Q1, block switch Q2, is segmented and opens
Q6, block switch Q8 and block switch Q9 and interconnection switch Q3 and interconnection switch Q10 are closed, wherein includes segmentation on main line
Switch Q1, block switch Q2, block switch Q8 and block switch Q9, block switch Q9 are located at the most lower of corresponding agent territory
Trip, block switch Q9, block switch Q8, block switch Q2 and block switch Q1 the fault actions time successively are as follows: 1s, 2s,
The fault actions time of 3s and 4s, outlet switch QS1 are 5s.Block switch Q6 is branch switch, the failure of block switch Q6
Actuation time is less than the fault actions time of any one switch in main line, in the present embodiment, the failure of block switch Q6
Actuation time is set as 0.5s.
Similarly, in the region that outlet switch QS2 is acted on behalf of, block switch Q4, block switch Q5 and outlet switch QS2
The fault actions time successively are as follows: 1s, 2s and 3s；In the region that outlet switch QS3 is acted on behalf of, block switch Q11, segmentation
The fault actions time of switch Q12 and outlet switch QS3 is successively are as follows: 1s, 2s and 3s.It is acted on behalf of in outlet switch QS3
In region, block switch Q7 and block switch Q13 are branch switch, therefore the failure of block switch Q7 and block switch Q13
Actuation time is less than the fault actions time of any one switch in main line, in the present embodiment, block switch Q7 and segmentation
The fault actions time of switch Q13 is set as 0.5s.
Step 1003, judge whether that small current grounding fault occurs；
Whether small current grounding fault occurs in route, if small current grounding fault does not occur, recycles and execute this step
Suddenly, in case of small current grounding fault, step 1004 is executed.The transient reactive power of failure definition point upstream is negative simultaneously,
The transient reactive power of trouble point downstream is positive.
Step 1004, fault point upstream switch delay excision；
After small current grounding fault occurs in route, the switch of fault point upstream detects failure and according to step
The fault actions time configured in 1002 is acted.
Step 1005, separating brake trouble point downstream switchs, isolated fault point；
Outlet switch controls the block switch separating brake of trouble point downstream, realizes the isolation of fault zone.
In conjunction with Fig. 3, when fault point K1 is located at the downstream of block switch Q1, block switch Q1 and outlet switch QS1 inspection
Failure is measured, and judges that transient reactive power is negative value, therefore fault point is located at the downstream of block switch Q1, therefore segmentation is opened
It closes Q1 delay 4s to disconnect later, after block switch Q1 movement, the residual voltage that outlet switch QS1 is detected disappears, and outlet is opened
It closes QS1 and is not necessarily to deferred action, and outlet switch QS1 is received and determined that fault point is located at point after the action message of block switch Q1
In region composed by the downstream of Duan Kaiguan Q1, i.e. block switch Q1, block switch Q2 and block switch Q6, outlet switch
QS1, which issues instruction, disconnects block switch Q2 and block switch Q6, completes the isolation of fault section.
Step 1006, the interconnection switch of needs movement and the interconnection switch that closes a floodgate are determined；；
The regional agency terminal of agent territory where fault point compares spare in contiguous agent region according to interconnection switch
The size of capacity determines the wherein maximum agent territory of spare capacity, and the agent territory where fault point is adjacent thereto
Interconnection switch between the maximum agent territory of spare capacity is determined as the interconnection switch for needing to restore, and the interconnection switch is closed
Lock.
In conjunction with Fig. 4, outlet switch QS1 compares the spare capacity of interconnection switch Q10 and interconnection switch Q3, it is assumed that interconnection switch
The spare capacity of Q10 is greater than the spare capacity of interconnection switch Q3, then outlet switch QS1, which issues instruction, is closed interconnection switch Q10,
It can be block switch Q10 after interconnection switch Q10 closure.
Step 1007, topological network is updated；
After interconnection switch closes a floodgate, regional agency terminal establishes network real-time topology according to the displacement information of switch.
As shown in figure 4, disconnecting block switch Q1, block switch Q2 and block switch Q6 according to above-mentioned steps, and
After interconnection switch Q10 closure, without the block switch for being in coincidence in the agent territory that outlet switch QS1 is acted on behalf of, only wrap
Wiretap QS1 is included, the agent territory that outlet switch QS2 is acted on behalf of includes: block switch Q8 ~ block switch Q12；Outlet switch
The agent territory that QS3 is acted on behalf of includes: block switch Q4, block switch Q5, block switch Q7 and block switch Q13.
Step 1008, the fault actions time switched in regional agency is reconfigured；
According to the setting principle of above-mentioned fault actions time, it is dynamic that regional agency terminal center configures the failure switched in it
Make the time.
In conjunction with Fig. 4, since the agent territory acted on behalf of outlet switch QS1 only includes outlet switch QS1, outlet switch
The fault actions time of QS1 is configured to 1s；In the region that outlet switch QS2 is acted on behalf of, the failure of block switch Q8 ~ Q12 is dynamic
It configures in order as the time as 1s, 2s, 3s, 4s, 5s, the fault actions time of outlet switch QS2 is configured to 6s；Due to outlet switch
What is switched in the agent territory that QS3 is acted on behalf of does not conjugate, therefore the fault actions time respectively switched in it does not change,
I.e. in the region that outlet switch QS3 is acted on behalf of, the failure of block switch Q11, block switch Q12 and outlet switch QS3 are dynamic
Make the time still successively are as follows: 1s, 2s and 3s.
Specific work process and working principle are as follows:
In a certain section of power distribution network, regional agency terminal is configured by each outlet switch in power distribution network first, then
Using interconnection switch as boundary, using the region between interconnection switch and adjacent regional agency terminal as regional agency terminal institute's generation
The agent territory of reason.Then the configuration of fault actions time, concrete configuration principle are carried out to the switch in each agent territory
Are as follows: the switch being located on main line in the agent territory between outlet switch and interconnection switch is starting point under it using outlet switch
The fault actions time of the switch of trip successively shortens, and outlet switch itself participates in the configuration of fault actions time, interconnection switch
Itself it is not involved in the configuration of fault actions time.
Whether small current grounding fault occurs in route, after small current grounding fault occurs in power distribution network, according to event
The transient reactive power of barrier point upstream is negative, and the principle that the transient reactive power of trouble point downstream is positive is located at fault point upstream
Switch according to its configuration fault actions time delays act, regional agency terminal is sentenced according to switch motion information after movement
A disconnected region at place of being out of order, and the block switch separating brake of trouble point downstream is controlled, realize the isolation of fault zone.
The regional agency terminal of agent territory where fault point compares spare in contiguous agent region according to interconnection switch
The size of capacity determines the wherein maximum agent territory of spare capacity, and the agent territory where fault point is adjacent thereto
Interconnection switch between the maximum agent territory of spare capacity is determined as service restoration switch, and will open interconnection switch combined floodgate.Connection
After network switch closes a floodgate, regional agency terminal establishes network real-time topology according to the displacement information of switch, and configuring area again
The fault actions time switched in agency.
Embodiment 2:
In the present embodiment, the original state of power distribution network is identical as power distribution network network shown in Fig. 2, it is assumed that fault point K2 hair
Life is specific to occur between block switch Q5 and outlet switch QS2 in the agent territory that outlet switch QS3 is acted on behalf of, such as Fig. 5
It is shown.
After the K2 that breaks down occurs, outlet switch QS2 judges that transient reactive power is negative value, i.e. outlet switch
QS2 is located at the upstream of fault point K2, then outlet switch QS2 should be disconnected, and after reaching configured actuation time, outlet is opened
It closes QS2 to disconnect, and issuing instruction disconnects the block switch Q5 in the fault point downstream K2, the isolation of fault section is realized, such as Fig. 6 institute
Show.
Then outlet switch QS2 compares the spare capacity of interconnection switch Q3 and interconnection switch Q10, it is assumed that interconnection switch
The spare capacity of Q10 is less than the spare capacity of interconnection switch Q3, then outlet switch QS1, which issues instruction, is closed interconnection switch Q3,
It can be block switch Q3 after interconnection switch Q3 closure.
After block switch Q5 and outlet switch QS2 is disconnected according to above-mentioned steps and is closed interconnection switch Q3,
The agent territory that outlet switch QS1 is acted on behalf of include: block switch Q1 ~ block switch Q4, block switch Q6 ~ block switch Q9 with
And block switch Q13 is only opened including outlet without the block switch for being in coincidence in the agent territory that outlet switch QS2 is acted on behalf of
QS2 is closed, the agent territory that outlet switch QS3 is acted on behalf of includes: block switch Q11, block switch Q12.
Then the fault actions time switched in regional agency is reconfigured, it is specific as follows: to be acted on behalf of in outlet switch QS1
Agent territory in, fault actions time of block switch Q9 and block switch Q4 is 1s, block switch Q8 and block switch Q3
The fault actions time be 2s, the fault actions time of block switch Q2, block switch Q1 and outlet switch QS1 are successively are as follows:
3s,4s,5s.In the region that outlet switch QS3 is acted on behalf of, block switch Q11, block switch Q12 and outlet switch QS3's
The fault actions time is successively are as follows: 1s, 2s and 3s.In the agent territory that outlet switch QS2 is acted on behalf of, due to not locating
It is also at quartile state in the switch and outlet switch QS2 itself of coincidence, therefore in the agent territory that outlet switch QS2 is acted on behalf of
It is interior, it does not switch and needs to reconfigure the fault actions time.
Embodiment 3:
In the present embodiment, the original state of power distribution network is identical as power distribution network network shown in Fig. 2, it is assumed that fault point K3 hair
It is raw specifically to occur between block switch Q11 and block switch Q12 in the agent territory that outlet switch QS2 is acted on behalf of, such as scheme
Shown in 7.
After the K3 that breaks down occurs, outlet switch QS3 and block switch Q12 judge that transient reactive power is negative
Value, i.e. outlet switch QS3 and block switch Q12 are located at the upstream of fault point K2, then outlet switch QS2 and block switch Q12 are answered
Work as disconnection, after reaching configured actuation time, block switch Q12 is disconnected first, after block switch Q12 movement, out
The residual voltage that wiretap QS3 is detected disappears, and outlet switch QS3 is not necessarily to deferred action, and outlet switch QS3 receives segmentation
Determine that fault point is located at the downstream of block switch Q12, i.e. block switch Q11 and block switch after the action message of switch Q12
In region composed by Q12, outlet switch QS3, which issues instruction, disconnects block switch Q11, completes the isolation of fault section, such as
Shown in Fig. 8.
Then outlet switch QS3 compares the spare capacity of interconnection switch Q3 and interconnection switch Q10, it is assumed that interconnection switch
The spare capacity of Q10 is greater than the spare capacity of interconnection switch Q3, then outlet switch QS3, which issues instruction, is closed interconnection switch Q10,
It can be block switch Q10 after interconnection switch Q10 closure.
After being disconnected according to above-mentioned steps by block switch Q11, block switch Q11 and being closed interconnection switch Q10, out
The agent territory that wiretap QS1 is acted on behalf of include: block switch Q1, block switch Q2, block switch Q6, block switch Q8 ~ point
Duan Kaiguan Q10, the agent territory that outlet switch QS2 is acted on behalf of include: block switch Q4, block switch Q5, block switch Q7 with
And block switch Q13.Without the block switch for being in coincidence in the agent territory that outlet switch QS3 is acted on behalf of, only opened including outlet
Close QS3.
Then the fault actions time switched in regional agency is reconfigured, it is specific as follows: to be acted on behalf of in outlet switch QS1
Agent territory in, block switch Q10, block switch Q9, block switch Q8, block switch Q2, block switch Q1 and outlet
The fault actions time corresponding to switch QS1 is followed successively by 1s ~ 6s, in the region that outlet switch QS2 is acted on behalf of, block switch
The fault actions time of Q4, block switch Q5 and outlet switch QS2 are successively are as follows: 1s, 2s and 3s；In outlet switch QS3 institute
In the region of agency, the fault actions time corresponding to outlet switch QS3 is 1s.
Embodiment 4:
In the present embodiment, it is illustrated with the expression-form of cable system: being set in overhead line network as shown in Figure 9
Three power supplys: power supply T1, power supply T2 and power supply T3 are equipped with, be additionally provided with power outlet switch: outlet switch QS1 ~ outlet is opened
QS3 is closed, outlet switch QS1 ~ outlet switch QS3 is respectively the outlet switch of power supply T1, power supply T2 and power supply T3.It is opened in outlet
Ring network cabinet there are four once connecting between QS1 and outlet switch QS2: ring network cabinet H1 ~ ring network cabinet H5 is closed, wherein ring network cabinet H1 includes
Two looped network cabinet switchs: looped network cabinet switch Q11, looped network cabinet switch Q12, further include two outlet branch switches: outlet branch opens
Close Q111 and outlet branch switch Q112；Ring network cabinet H2 includes two looped network cabinet switchs: looped network cabinet switch Q21, looped network cabinet switch
Q22 further includes two outlet branch switches: outlet branch switch Q211 and outlet branch switch Q212；Ring network cabinet H3 includes two
A looped network cabinet switch: looped network cabinet switch Q31, looped network cabinet switch Q32 further include two outlet branch switches: outlet branch switch
Q311 and outlet branch switch Q312；Ring network cabinet H4 includes two looped network cabinet switchs: looped network cabinet switch Q41, looped network cabinet switch
Q42 further includes two outlet branch switches: outlet branch switch Q411 and outlet branch switch Q412.
Power supply T1 passes through the looped network cabinet switch Q11 of outlet switch QF1 connection ring network cabinet H1, the looped network cabinet switch of ring network cabinet H1
The ring network cabinet of the looped network cabinet switch Q22 connection ring network cabinet H3 of the looped network cabinet switch Q21 of Q12 connection ring network cabinet H2, ring network cabinet H2 are opened
Close Q31, the looped network cabinet switch Q41 of the looped network cabinet switch Q32 connection ring network cabinet H4 of ring network cabinet H3, the looped network cabinet switch of ring network cabinet H4
Q42 passes through outlet switch QF2 connection power supply T2.
The outlet branch switch Q211 of ring network cabinet H2 passes through switch Q7, ring network cabinet H5, ring network cabinet H6 and outlet switch QF3
Power supply 3 is connected, wherein ring network cabinet H5 includes two looped network cabinet switchs: looped network cabinet switch Q51, looped network cabinet switch Q52, further include two
A outlet branch switch: outlet branch switch Q511 and outlet branch switch Q512；Ring network cabinet H6 includes two looped network cabinet switchs:
Looped network cabinet switch Q61, looped network cabinet switch Q62 further include two outlet branch switches: outlet branch switch Q611 and outlet branch
Switch Q612.
The outlet branch switch Q211 of ring network cabinet H2 passes through the looped network cabinet switch Q51 of switch Q7 connection ring network cabinet H5, looped network
The looped network cabinet switch Q62 of the looped network cabinet switch Q61 of the looped network cabinet switch Q52 connection ring network cabinet H6 of cabinet H5, ring network cabinet H6 are by going out
Wiretap QF3 connection power supply T3.
Monitoring of electric power terminal DTU1 ~ monitoring of electric power terminal DTU6 corresponding with above-mentioned ring network cabinet H1 ~ ring network cabinet H6
It is connect respectively with control main website S1 by network.Looped network cabinet switch Q31 in above-mentioned switch Q7 and ring network cabinet H3 be in
The interconnection switch of quartile.The above-mentioned outlet switch connected to power supply, interconnection switch, branch's outlet switch in ring network cabinet and is opened
Close the integral switch realization that Q7 was all made of while can detect zero-sequence current and residual voltage.
In cable system figure as shown in Figure 9, being connect based on the power distribution network low current of regional agency as shown in connection with fig. 1
The process of earth fault partition method:
For step 1001: outlet switch QF1 ~ outlet switch QF3 being respectively defined as regional agency terminal, wherein going out
The agent territory that wiretap QF1 is acted on behalf of includes: ring network cabinet H1, ring network cabinet H2, ring network cabinet H3 and interconnection switch Q7；Outlet is opened
Closing the agent territory that QF2 is acted on behalf of includes: ring network cabinet H3 and ring network cabinet H4, and the agent territory of outlet switch QF3 includes ring network cabinet
H5, ring network cabinet H6 and interconnection switch Q7.
For step 1002: the fault actions time switched in Configuration Agent region；
According to above-mentioned: the switch being located on main line in the agent territory between outlet switch and interconnection switch, with outlet
Switch is successively to shorten the fault actions time of the switch of starting point downstream, and outlet switch itself participates in the fault actions time
Configuration, interconnection switch itself is not involved in the principle of the configuration of fault actions time, by the looped network cabinet switch of ring network cabinet H2 in Fig. 9
Q22, looped network cabinet switch Q21, the failure of the looped network cabinet switch Q12 of ring network cabinet H2, looped network cabinet switch Q11 and outlet switch QF1
Actuation time configures in order as 1s ~ 5s；
By the looped network cabinet switch Q32 of ring network cabinet H3, looped network cabinet switch Q41, the looped network cabinet switch Q42 of ring network cabinet H4 and go out
The fault actions time of wiretap QF2 configures in order as 1s ~ 4s；Looped network cabinet switch Q51, the looped network cabinet switch Q52 of ring network cabinet H5,
Looped network cabinet switch Q61, the looped network cabinet switch Q62 of ring network cabinet H6 and the fault actions time of outlet switch QF3 configure in order for
1s~5s；Branch outlet switch Q111, branch outlet switch Q112 in ring network cabinet H1 ~ ring network cabinet H6, branch's outlet switch
Q211, branch outlet switch Q212, branch outlet switch Q311, branch outlet switch Q312, branch outlet switch Q411, branch
Outlet switch Q412, branch outlet switch Q511, branch outlet switch Q512 and branch outlet switch Q611, branch's outlet are opened
The fault actions time unification for closing Q612 is defined as 0.25s.
For step 1003 ~ step 1005: as shown in Figure 10, it is assumed that fault point K4 is located at the looped network cabinet switch of ring network cabinet H1
Between Q12 and the looped network cabinet switch Q21 of ring network cabinet H2, looped network cabinet switch Q11, looped network cabinet switch Q12 and outlet switch QF1 inspection
Failure is measured, and judges that transient reactive power is negative value, therefore fault point is located at the downstream of looped network cabinet switch Q12, therefore ring
It is disconnected after net cabinet switch Q12 delay 3s, after looped network cabinet switch Q12 movement, looped network cabinet switch Q11, outlet switch QF1 detection
The residual voltage arrived disappears, and outlet switch QF1 and looped network cabinet switch Q11 are not necessarily to deferred action, and outlet switch QF1 receives ring
Determine that fault point is located at the downstream of looped network cabinet switch Q12 after the action message of net cabinet switch Q12, i.e. looped network cabinet switch Q12 with
Between the looped network cabinet switch Q21 of ring network cabinet H2, outlet switch QF1, which issues instruction, disconnects looped network cabinet switch Q21, completes faulty section
The isolation of section.
For step 1006: outlet switch QF1 compares the spare capacity of interconnection switch Q7 and interconnection switch Q31, it is assumed that connection
The spare capacity of network switch Q7 is less than the spare capacity of interconnection switch Q31, then outlet switch QF1, which issues instruction, makes interconnection switch
Q31 is closed, and can be looped network cabinet switch Q31 after interconnection switch Q31 closure.
For step 1007:
After looped network cabinet switch Q12, looped network cabinet switch Q21 are disconnected and are closed interconnection switch Q31, outlet switch
The agent territory that QF1 is acted on behalf of includes ring network cabinet H1；The agent territory that outlet switch QF2 is acted on behalf of includes: ring network cabinet H2 ~ looped network
Cabinet H4；The agent territory of outlet switch QF3 includes ring network cabinet H5, ring network cabinet H6 and interconnection switch Q7.
For step 1008:
Since the agent territory acted on behalf of outlet switch QF1 only includes ring network cabinet H1, ring network cabinet is opened in ring network cabinet H1
The fault actions time for closing Q11 is configured to 1s, and the fault actions time of outlet switch QF1 is configured to 2s；In outlet switch QF2 institute
In the region of agency, looped network cabinet switch Q32, the looped network cabinet switch Q32 of the looped network cabinet switch Q22 of ring network cabinet H2, ring network cabinet H3, ring
Looped network cabinet switch Q41, the looped network cabinet switch Q42 of net cabinet H4 and the fault actions time of outlet switch QF2 configure in order for 1s ~
6s；Looped network cabinet switch Q51, the looped network cabinet switch Q52 of ring network cabinet H5, looped network cabinet switch Q61, the looped network cabinet switch of ring network cabinet H6
The fault actions time of Q62 and outlet switch QF3 configures in order as 1s ~ 5s.
Embodiment 5:
In the present embodiment, the difference with embodiment 4 is: in the generation acted on behalf of in outlet switch QF2, occurs for fault point K5
It manages in region, it is specific to occur between the looped network cabinet switch Q41 of the looped network cabinet switch Q32 and ring network cabinet H4 of ring network cabinet H3, such as scheme
Shown in 11.
Looped network cabinet switch Q41, looped network cabinet switch Q42 and outlet switch QF2 detect failure at this time, and judge transient state
Reactive power is negative value, therefore fault point is located at the downstream of looped network cabinet switch Q41, therefore after looped network cabinet switch Q41 delay 2s
It disconnects, after looped network cabinet switch Q41 movement, the residual voltage that looped network cabinet switch Q42, outlet switch QF2 are detected disappears, outlet
Switch QF2 and looped network cabinet switch Q42 is not necessarily to deferred action, and outlet switch QF3 receives the action message of looped network cabinet switch Q41
Determine that fault point is located at the downstream of looped network cabinet switch Q41, the i.e. looped network cabinet switch of looped network cabinet switch Q41 and ring network cabinet H3 later
Between Q32, outlet switch QF2, which issues instruction, disconnects looped network cabinet switch Q32, completes the isolation of fault section.
Outlet switch QF2 compares the spare capacity of interconnection switch Q7 and interconnection switch Q31, it is assumed that interconnection switch Q7's is spare
Capacity is less than the spare capacity of interconnection switch Q31, then outlet switch QF1, which issues instruction, is closed interconnection switch Q31, interconnection switch
It can be looped network cabinet switch Q31 after Q31 closure.
After looped network cabinet switch Q41, looped network cabinet switch Q32 are disconnected and are closed interconnection switch Q31, outlet switch
The agent territory that QF1 is acted on behalf of includes ring network cabinet H1 ~ ring network cabinet H3 and interconnection switch Q7；The generation that outlet switch QF2 is acted on behalf of
Managing region includes ring network cabinet H4；The agent territory of outlet switch QF3 includes ring network cabinet H5, ring network cabinet H6 and interconnection switch Q7.
In the agent territory that outlet switch QF1 is acted on behalf of: looped network cabinet switch Q31, looped network cabinet switch Q22, ring network cabinet are opened
The fault actions time for closing Q21, looped network cabinet switch Q12, looped network cabinet switch Q11 and outlet switch QF1 is followed successively by 1s ~ 6s；?
In the agent territory that outlet switch QF2 is acted on behalf of: the fault actions time of looped network cabinet switch Q42 and outlet switch QF2 is successively
It is configured to 1s ~ 2s；In the agent territory that outlet switch QF3 is acted on behalf of: the looped network cabinet switch Q51 of ring network cabinet H5, ring network cabinet are opened
Close Q52, the fault actions time of looped network cabinet switch Q61, the looped network cabinet switch Q62 of ring network cabinet H6 and outlet switch QF3 are successively
It is configured to 1s ~ 5s.
Embodiment 6:
In the present embodiment, the difference with embodiment 4 is: in the generation acted on behalf of in outlet switch QF3, occurs for fault point K6
It manages in region, it is specific to occur between the looped network cabinet switch Q61 of the looped network cabinet switch Q52 and ring network cabinet H6 of ring network cabinet H5, such as scheme
Shown in 12.
Looped network cabinet switch Q61, looped network cabinet switch Q62 and outlet switch QF3 detect failure at this time, and judge transient state
Reactive power is negative value, therefore fault point is located at the downstream of looped network cabinet switch Q61, therefore after looped network cabinet switch Q61 delay 3s
It disconnects, after looped network cabinet switch Q61 movement, the residual voltage that looped network cabinet switch Q62, outlet switch QF3 are detected disappears, outlet
Switch QF3 and looped network cabinet switch Q62 is not necessarily to deferred action, and outlet switch QF3 receives the action message of looped network cabinet switch Q61
Determine that fault point is located at the downstream of looped network cabinet switch Q61, the i.e. looped network cabinet switch of looped network cabinet switch Q61 and ring network cabinet H5 later
Between Q52, outlet switch QF3, which issues instruction, disconnects looped network cabinet switch Q52, completes the isolation of fault section.
Outlet switch QF3 compares the spare capacity of interconnection switch Q7 and interconnection switch Q31, it is assumed that interconnection switch Q7's is spare
Capacity is greater than the spare capacity of interconnection switch Q31, then outlet switch QF1, which issues instruction, is closed interconnection switch Q7.
After looped network cabinet switch Q41, looped network cabinet switch Q32 are disconnected and are closed interconnection switch Q31, outlet switch
The agent territory that QF1 is acted on behalf of includes ring network cabinet H1, ring network cabinet H2, ring network cabinet 5, ring network cabinet 6 and interconnection switch Q7；Outlet is opened
Closing the agent territory that QF2 is acted on behalf of includes ring network cabinet 3, ring network cabinet H4；The agent territory of outlet switch QF3 includes ring network cabinet H6.
In the agent territory that outlet switch QF1 is acted on behalf of: outlet switch QF1, looped network cabinet switch Q11, looped network cabinet switch
The event of Q12, looped network cabinet switch Q21, branch outlet switch Q211, interconnection switch Q7, looped network cabinet switch Q51, looped network cabinet switch Q52
Barrier actuation time is followed successively by 8s ~ 1s, and the actuation time of looped network cabinet switch Q22 is less than the time of branch's outlet switch Q211,
It is configured to 2s.In the agent territory that outlet switch QF2 is acted on behalf of: looped network cabinet switch Q32, looped network cabinet switch Q41, ring network cabinet are opened
The fault actions time for closing Q42 and outlet switch QF2 is followed successively by 1s ~ 4s；In the agent territory that outlet switch QF3 is acted on behalf of
Interior: the fault actions time of the looped network cabinet switch Q62 and outlet switch QF3 of ring network cabinet H6 configure in order as 1s ~ 2s.
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to above embodiments institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection scope of technical solution of the present invention.
Claims (6)
1. a kind of power distribution network small current grounding fault partition method based on regional agency, multiple power supplys are equipped in power distribution network,
The power output end of each power supply is provided with outlet switch, is provided with the interconnection switch that multiple reset conditions are in quartile, connection
Network switch is isolated by two adjacent outlet switchs, is opened if being additionally provided with main line between outlet switch and interconnection switch
It closes, small current grounding fault betides any position of power distribution network, characterized by the following steps:
The power distribution network is divided into multiple agent territories by step a, and a regional agency is set in each agent territory
Terminal；
Step b, the fault actions time of outlet switch and line switching in Configuration Agent region；
Step c judges whether small current grounding fault occurs in power distribution network；If small current grounding fault does not occur, recycle
This step is executed, in case of small current grounding fault, executes step d；
Step d is located at failure by what abort situation judgment basis judged after small current grounding fault occurs in route
The outlet switch or line switching of point upstream, outlet switch or line switching prolong according to the fault actions time configured in step b
When act；
Step e, the line switching separating brake of regional agency terminal control trouble point downstream, realizes the isolation of fault point；
Step f, regional agency terminal determine the interconnection switch of needs movement and the interconnection switch that closes a floodgate；
Step g, regional agency terminal update the topological network of power distribution network；
Step h reconfigures the fault actions time of line switching in agent territory；
In the step a, the land between outlet switch and interconnection switch is the agent territory, outlet switch
Itself is as the regional agency terminal in agent territory；
In the step b, the setting principle of fault actions time are as follows: the route being located on main line in agent territory is opened
Close, successively shortened using the fault actions time that outlet switch is starting point line switching downstream, and outlet switch itself participate in it is former
Hinder the configuration of actuation time, interconnection switch itself is not involved in the configuration of fault actions time, the branch line being connected on main line
The fault actions time of way switch is less than the fault actions time of any one line switching on main line.
2. the power distribution network small current grounding fault partition method according to claim 1 based on regional agency, feature exist
The looped network cabinet switch of ring network cabinet in the block switch or cable run that: the line switching is in overhead line.
3. the power distribution network small current grounding fault partition method according to claim 1 based on regional agency, feature exist
In: outlet switch, interconnection switch and the line switching is using the one that can detect zero-sequence current and residual voltage simultaneously
Switching.
4. the power distribution network small current grounding fault partition method according to claim 1 based on regional agency, feature exist
In: abort situation judgment basis described in step d are as follows: the transient reactive power of fault point upstream is negative, trouble point downstream
Transient reactive power is positive.
5. the power distribution network small current grounding fault partition method according to claim 1 based on regional agency, feature exist
In: using transient reactive power method to whether the small current grounding fault occurs judging in step c.
6. the power distribution network small current grounding fault partition method according to claim 1 based on regional agency, feature exist
In: the determination basis for the interconnection switch for needing to act described in step f are as follows: with the agent territory phase that small current grounding fault occurs
The maximum interconnection switch of spare capacity is the interconnection switch of needs movement in adjacent interconnection switch.
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| CN109245072B (en) * | 2018-09-17 | 2020-02-21 | 南京国电南自电网自动化有限公司 | Self-adaptive in-situ feeder automation fault processing method based on regional sequence number |
| CN109387732A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of adaptive in-situ protection method and system of small current grounding fault |
| CN111426915B (en) * | 2020-05-11 | 2022-06-07 | 云南电网有限责任公司电力科学研究院 | Distributed small current ground fault positioning method |
| CN112904145A (en) * | 2021-01-22 | 2021-06-04 | 福州大学 | Power distribution network single-phase earth fault section positioning method and system |
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