CN106786522B - Intelligent distribution network self-healing control method based on peer-to-peer communication network - Google Patents
Intelligent distribution network self-healing control method based on peer-to-peer communication network Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention discloses a kind of intelligent distribution network self-healing control methods based on peer-to-peer communication network, the following steps are included: 1) whether intelligent FTU to be periodically detected route normal, normal then each intelligent FTU executes periodical self-test, abnormal, enters step 2)；2) network protection starting judgement, if not meeting start-up criterion, EP (end of program)；If meeting start-up criterion, network protective program is activated, is entered step 3)；3) enter fault locating program, the whether set of Fault Isolation mark is judged, if it is not, entering step 4), if so, entering step 5)；4) enter fault isolation routine；5) enter single shot reclosing program；Judge whether reclosing succeeds, if it is not, entering step 6), if so, entering step 7)；6) enter load transfer program；7) enter flag bit reset routine；8) EP (end of program).The present invention can have found in time, prevent and be isolated various potential risks, and independently repair failure and fast recovery of power supply.
Description
Technical field
The present invention relates to intelligent power distribution field, in particular to a kind of intelligent distribution network self-healing based on peer-to-peer communication network
Control method.
Background technique
Intelligent distribution network self-healing control is that existing utilization rate of equipment and installations is low for a long time, power supply is reliable for solution China's power distribution network
Property it is low, line loss per unit is high key issues of core technology, be to solve the key technology that largely accesses of distributed generation resource, be modern electricity
The inevitable choice of network technology development.That embody self-healing control earliest in distribution system is feeder automation (Feeder
Automation, FA) technology, i.e., from substation's outlet to the feeder line automation user power utilization equipment.Feeder line is automatic
The core content of change technology is fault detection, Fault Isolation, load transfer and the service restoration control of power distribution network in the state of accident
System.Power distribution automation (Distribution Automation, DA) technology is on the basis of feeder automation, in conjunction with to match
Electric SCADA is the Distribution Management System of core, realizes the monitoring to entire distribution system in normal operation and accident, protects
Shield, the technology of control and management.The target of intelligent distribution network self-healing control is to find, prevent in time in power distribution network operational process
With the various potential risks of isolation, the state that optimizes the system operation simultaneously successfully manages the inside and outside various disturbances occurred of system, in failure feelings
System continuous operation, autonomous reparation failure and fast recovery of power supply are maintained under condition, it is artificial dry when by reduction power distribution network operation
In advance, the influence of disturbance or failure to power grid and user is reduced, frequency of power cut is reduced, greatly reduces customer outage hours and power failure shadow
Ring number of users.
In traditional intelligent distribution network self-healing control method, realizes and be stranded there are electric current in distribution line and time Graded coordination
Difficult problem, and control effect is not ideal.
Summary of the invention
In order to solve the above technical problem, the present invention provides one kind to find in time in power distribution network operational process, pre-
Prevent and various potential risks are isolated, power grid is made to maintain system continuous operation, autonomous reparation failure simultaneously quickly extensive in case of a fault
The intelligent distribution network self-healing control method based on peer-to-peer communication network powered again.
Technical proposal that the invention solves the above-mentioned problems is: a kind of intelligent distribution network self-healing based on peer-to-peer communication network
Control method, comprising the following steps:
1) intelligent FTU is periodically detected whether route is normal, and if normal, then each intelligent FTU executes the period
2) property self-test, then enters step if abnormal,；
2) network protection starting judgement, if not meeting start-up criterion, EP (end of program) are carried out；If meeting start-up criterion,
Network protective program is activated, is entered step 3)；
3) enter fault locating program, judge the whether set of Fault Isolation mark, if it is not, then enter step 4), if
It is then to enter step 5)；
4) enter fault isolation routine；
5) enter single shot reclosing program；Judge whether reclosing succeeds, if it is not, then enter step 6), if so, into
Step 7)；
6) enter load transfer program；
7) enter flag bit reset routine；
8) EP (end of program).
The above-mentioned intelligent distribution network self-healing control method based on peer-to-peer communication network, in the step 1), when route just
Chang Shi, intelligent FTU execute periodical self-test, the communication condition of intelligent FTU inspection and neighbours, if only side
Neighbours cannot communicate, then the neighbor terminal that the neighbours of neighbours are new as oneself, and each terminal updates network topological information.
The above-mentioned intelligent distribution network self-healing control method based on peer-to-peer communication network, the step 2) the specific steps are
2-1) judge whether active flag set, if so, entering step 3)；If it is not, then entering step 2-2)；
2-2) judge whether to meet and hide criterion of shoving, if so, 3) flag set of shoving, enters step；If it is not, then clear
Except the mark that shoves is hidden, open and protection function enters step 2-3)；
2-3) judge whether to meet overcurrent criterion and be unsatisfactory for short-circuit criterion, if so, to System Reports state, then into
Enter step 3)；If it is not, then entering step 2-4)；
2-4) judge whether to meet short-circuit criterion or decompression criterion, if so, network protection active flag set, to system
Report state starts 110ms timer, subsequently into step 3)；If it is not, then entering step 2-5)；
2-5) judge whether to meet ground connection criterion, if so, single-phase earthing flag set, to System Reports state, then
It enters step 3)；If it is not, being then directly entered step 3).
The above-mentioned intelligent distribution network self-healing control method based on peer-to-peer communication network, in the step 2), protection starting
Judge that criterion includes overcurrent adjusting, short circuit current adjusting, decompression judgement and judgement of shoving, in which:
Overcurrent adjusting:
I>Ioc.op=KrelIoc.max
In formula, I is line current measured value, Ioc.opFor overcurrent action value, Ioc.maxFor maximum load current, KrelFor can
By coefficient, Krel=1.2；
Short circuit current adjusting:
In formula, I is the measured value of line current；Ik.opFor short circuit current action value；E is system emf phase；ZsFor end
Hold the line impedance between substation；ZkFor the impedance between intelligence terminal and neighbor terminal；KrelFor safety factor, Krel=
1.2；
C. decompression judges:
U is terminal voltage measured value in formula；UopFor decompression action value；UminFor the minimum voltage that is likely to occur in operation,
Umin=0.5Un, UnFor system nominal voltage, for 10kV power distribution network, Un=10kV；KrelFor safety factor, Krel=1.2；
D. it shoves judgement:
In formula, η is the secondary harmonic component of line current, and I is the measured value of line current, I2thFor line current measurement
Second harmonic component in value can determine whether that route shoves when second harmonic current content is more than 15%.
5. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, special
Sign is: the step 3) the specific steps are
The whether set of itself difference ring, main difference ring Reflector 3-1) is judged, if so, entering step 3-7)；
If it is not, then starting 10ms timer, the calculating of itself difference ring difference current is carried out, 3-2 is entered step)；
3-2) judge it is whether faulty in itself difference ring, if so, itself difference ring Reflector set, all switches
Reflector set, enters step 3-7)；If it is not, then entering step 3-3)；
Number of switches i in this intelligent FTU 3-3) is counted, j=0 is enabled；
3-4) this intelligent FTU and neighbours' intelligent FTU exchanging electric current data, then to j-th of main difference ring
Carry out difference current calculating；
3-5) judge it is whether faulty in j-th of main difference ring, if so, the main difference ring Reflector of intelligent FTU
Set, j-th of switch fault flag set, enters step 3-6)；If it is not, being then directly entered step 3-6)；
J=j+1 3-6) is enabled, judges whether j is greater than i, if so, entering step 3-7)；If it is not, then return step 3-4)；
3-7) judge big difference ring Reflector whether set or 10ms timing whether terminate, if so, entering step
4)；If it is not, then entering step 3-8)；
Number of switches m in this intelligent FTU 3-8) is counted, n=0 is enabled；
3-9) neighbours' intelligent FTU exchanging electric current data of this intelligent FTU and neighbours are then big to n-th
Difference ring carries out difference current calculating；
3-10) judge it is whether faulty in n-th big difference ring, if so, the big difference ring failure mark of intelligent FTU
Will set, n-th of switch fault flag set, enters step 3-11)；If it is not, being then directly entered step 3-11)；
N=n+1 3-11) is enabled, judges whether n is greater than m, if so, entering step 4)；If it is not, then return step 3-9).
6. the intelligent distribution network self-healing control method according to claim 5 based on peer-to-peer communication network, special
Sign is: in the step 3), itself difference ring is made of all switches in intelligent FTU；Main difference ring is by feeder line two
Hold connected switch composition；Big difference ring is made of secondary adjacent terminal, i.e. the neighbor terminal composition of this terminal and neighbours,
In itself difference ring failure criterion:
|i1+i2+…+in|>is.set
In formula, i1、i2…inRespectively to switch the electric current flowed through in itself difference ring；is.setSetting valve is acted for difference current；
Main difference ring failure criterion:
In formula, ia、ibFor the electric current for flowing through route a side intelligent FTU and the side b intelligent FTU；is.setIt is differential
Electric current acts setting valve；KrelFor safety factor, Krel=1.2；Two formulas more than main difference ring simultaneously satisfaction, can determine whether main difference
It breaks down in ring；
Big difference ring failure criterion:
In formula, ix、iyFor the electric current for flowing through route x side intelligent FTU and the side y intelligent FTU, the side y Intelligent feeder line
Terminal is the neighbours of the side x intelligent FTU neighbours；is.setSetting valve is acted for difference current；KrelFor safety factor, Krel=
1.2；Two formulas more than big difference ring simultaneously satisfaction, can determine whether to break down in big difference ring.
The above-mentioned intelligent distribution network self-healing control method based on peer-to-peer communication network, the step 4) the specific steps are
4-1) judge the whether set of intelligent FTU itself difference ring, main difference ring Reflector, if so, into
Enter step 4-3)；If it is not, then trip signal is issued to all stoppage circuit breakers, subsequently into step 4-2)；
4-2) judge whether that all stoppage circuit breakers trip successfully, if so, Fault Isolation flag set, enters step
5)；If it is not, then entering step 4-3)；
4-3) judging whether 110ms timing terminates and the big difference ring Reflector set of intelligent FTU, if so,
Then big difference ring Reflector switch trip, enters step 4-4)；If it is not, then entering step 5)；
4-4) judge whether that all stoppage circuit breakers trip successfully, if so, Fault Isolation flag set, enters step
5)；If it is not, being then directly entered step 5).
The above-mentioned intelligent distribution network self-healing control method based on peer-to-peer communication network, the step 5) the specific steps are
5-1) judge whether single shot reclosing function investment and the set of Fault Isolation mark, if it is not, then entering step
6)；If so, entering step 5-2)；
5-2) judge whether 1s timer starts, if so, entering step 5-3)；If it is not, after then starting 1s timer
Enter step 5-3)；
5-3) judge whether 1s timing terminates, if it is not, then entering step 6)；If so, entering step 5-4)；
5-4) judging intelligent FTU breakdown switch, whether the side side You Ya is without pressure, if it is not, then entering step 5-5)；
If so, entering step 5-6)；
5-5) judging intelligent FTU breakdown switch, whether two sides are without pressure, if so, entering step 6), if it is not, then examining
It is entered step 6) after asynchronous switch-on；
It 5-6) closes a floodgate, judges switch whether detect overcurrent again after closing a floodgate, if so, tripping alarm immediately, reports
6) main website, unsuccessful reclosing flag set, enters step；If it is not, then reporting main website, enter step 6).
The above-mentioned intelligent distribution network self-healing control method based on peer-to-peer communication network, the step 6) the specific steps are
6-1) judge whether intelligent FTU unsuccessful reclosing and the set of Fault Isolation mark and Intelligent feeder line are whole
Hold all switch two sides without pressure without stream, or whether intelligent FTU has not put into reclosing function and Fault Isolation mark
Through set and all switch two sides of intelligent FTU are without pressure without stream, if so, entering step 6-2)；If it is not, then entering step
Rapid 6-7)；
Preset load transfer priority 6-2) is judged whether there is, if so, entering step 6-3)；If it is not, then to m neighbour
It occupies interconnection switch and sends voltage inquiry request, then the voltage of more each interconnection switch, set priority according to voltage levels, then
Enter step 6-3)；
Order of closing a floodgate 6-3) is issued to highest priority interconnection switch, enters step 6-4)；
Closing success signal 6-4) is waited, judges whether to receive combined floodgate failure signal, if so, entering step 6-6)；If
It is no, then enter step 6-5:
6-5) judge whether switch two sides voltage and current is normal, if so, sending closing success signal to main website, into step
It is rapid 7)；If it is not, then interconnection switch trips, 6-6 is entered step)；
6-6) judge whether to traverse all interconnection switches, if so, alarm, reports main website, load transfer failure, into step
It is rapid 7)；If it is not, then sending request of closing a floodgate, and return step 6-4 to next interconnection switch)；
6-7) judge whether to have interconnection switch in intelligent FTU and be requested by load transfer, if so, entering step
Rapid 6-8)；If it is not, then entering step 7)；
The whether faulty mark of interconnection switch 6-8) is judged, if so, returning to failure of closing a floodgate to load transfer request source
Signal is latched this interconnection switch and turns for function, subsequently into step 7)；If it is not, then issuing order of closing a floodgate to interconnection switch, enter
Step 6-9)；
6-9) judge whether interconnection switch tripping, if so, returning to combined floodgate failure signal to load transfer request source, closes
This interconnection switch is locked to turn for function, subsequently into step 7)；If it is not, then starting closing success signal to main website, subsequently into step
It is rapid 7).
The beneficial effects of the present invention are: the present invention uses the communication network of peer-to-peer, and each intelligent FTU composition is not
Fault location is carried out with difference ring, difference ring is divided into itself difference ring, main difference ring and three kinds of big difference ring, is respectively intended to differentiate
Back-up protection after ring network cabinet internal short-circuit failure, feeder line segment fault and main protection failure.All difference rings obey KCL law, just
Under normal loading condition, the switch in ring is failure to actuate, and only when breaking down in ring, the switch motion in ring is tripped, this property
It is used for the fault-finding and positioning of electric system.After completing fault location, itself difference ring or main difference ring carry out failure every
From, by the switch tripping of faulty mark, if 110ms failure still has after starting network protection, event in big difference ring
Hinder sign switch tripping.After Fault Isolation success, the intelligent fault line feed terminals of power loss are issued to interconnection switch to be turned for signal.Such as
Have multiple interconnection switches on fruit route, then according to pre-set combined floodgate priority successively issue turn for request, if turn at
Function then EP (end of program)；In the case that all switch is breaker in distribution, fault location can be completed in 40ms, in 100ms
Failure is cut off, isolated fault in 400ms, 2s is interior to complete load transfer, and action message is uploaded to upper layer self-healing control system；
This self-healing control method can find in time, prevent and be isolated various potential risks, optimization system in power distribution network operational process
Operating status simultaneously successfully manages the various disturbances occurred in system, make power grid maintain in case of a fault system continuous operation, from
Multiple failure and fast recovery of power supply are majored in, by reducing human intervention when power distribution network operation, reduces disturbance or failure to power grid
With the influence of user, frequency of power cut is reduced, greatly reducing customer outage hours and having a power failure influences number of users, makes power distribution network power supply can
It can reach 99.999% by property index, year, power off time was less than 5.2 minutes.
Detailed description of the invention
Fig. 1 is general flow chart of the invention.
Fig. 2 is the flow chart of inventive network protection starting judgement.
Fig. 3 is the flow chart of fault location of the present invention.
Fig. 4 is the flow chart of Fault Isolation of the present invention.
Fig. 5 is the flow chart of single shot reclosing of the present invention.
Fig. 6 is the flow chart of load transfer of the present invention.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of intelligent distribution network self-healing control method based on peer-to-peer communication network, including following step
It is rapid:
1) intelligent FTU (Intelligent terminal unit, hereinafter referred to as ITU), which is periodically detected route, is
No normal, if normal, then each ITU executes periodical self-test, and ITU checks the communication condition with neighbours, if only side neighbours
It cannot communicate, then the neighbor terminal that the neighbours of neighbours are new as oneself, each terminal updates network topological information；If abnormal,
It then enters step 2).
2) when line failure, each terminal carries out network protection starting judgement, according to preset failure current thresholds
Judge that route is in abnormal condition, further checks whether shove on route, however, it is determined that be not circuit overcurrent, then activate
Network protection main program；If route shoves, terminate epicycle program.Specific steps are as follows:
2-1) judge whether active flag set, if so, entering step 3)；If it is not, then entering step 2-2)；
2-2) judge whether to meet and hide criterion of shoving, if so, 3) flag set of shoving, enters step；If it is not, then clear
Except the mark that shoves is hidden, open and protection function enters step 2-3)；
2-3) judge whether to meet overcurrent criterion and be unsatisfactory for short-circuit criterion, if so, to System Reports state, then into
Enter step 3)；If it is not, then entering step 2-4)；
2-4) judge whether to meet short-circuit criterion or decompression criterion, if so, network protection active flag set, to system
Report state starts 110ms timer, subsequently into step 3)；If it is not, then entering step 2-5)；
2-5) judge whether to meet ground connection criterion, if so, single-phase earthing flag set, to System Reports state, then
It enters step 3)；If it is not, being then directly entered step 3).
Protection starting judges that criterion includes overcurrent adjusting, short circuit current adjusting, decompression judgement and judgement of shoving, in which:
Overcurrent adjusting:
I>Ioc.op=KrelIoc.max
In formula, I is line current measured value, Ioc.opFor overcurrent action value, Ioc.maxFor maximum load current, KrelFor can
By coefficient, Krel=1.2；
Short circuit current adjusting:
In formula, I is the measured value of line current；Ik.opFor short circuit current action value；E is system emf phase；ZsFor end
Hold the line impedance between substation；ZkFor the impedance between intelligence terminal and neighbor terminal；KrelFor safety factor, Krel=
1.2；
C. decompression judges:
U is terminal voltage measured value in formula；UopFor decompression action value；UminFor the minimum voltage that is likely to occur in operation,
Umin=0.5Un, UnFor system nominal voltage, for 10kV power distribution network, Un=10kV；KrelFor safety factor, Krel=1.2；
D. it shoves judgement:
In formula, η is the secondary harmonic component of line current, and I is the measured value of line current, I2thFor line current measurement
Second harmonic component in value can determine whether that route shoves when second harmonic current content is more than 15%.
3) enter fault locating program and successively carry out itself difference ring calculating and main difference ring meter after network protection starting
It calculates, terminal is in communication with each other in main difference ring, interactive current information each other；Terminal carries out data exchange in big difference ring after 10ms,
And calculate difference current；According to the size of difference current, judge it is whether faulty in difference ring, by terminal in the difference ring of failure
Corresponding switch is labeled as breakdown switch.Specific steps are as follows:
The whether set of itself difference ring, main difference ring Reflector 3-1) is judged, if so, entering step 3-7)；
If it is not, then starting 10ms timer, the calculating of itself difference ring difference current is carried out, 3-2 is entered step)；
3-2) judge it is whether faulty in itself difference ring, if so, itself difference ring Reflector set, all switches
Reflector set, enters step 3-7)；If it is not, then entering step 3-3)；
Number of switches i in this ITU 3-3) is counted, j=0 is enabled；
Then 3-4) this ITU and neighbours ITU exchanging electric current data carry out difference current calculating to j-th of main difference ring；
3-5) judge it is whether faulty in j-th of main difference ring, if so, the main difference ring Reflector set of ITU, jth
A switch fault flag set, enters step 3-6)；If it is not, being then directly entered step 3-6)；
J=j+1 3-6) is enabled, judges whether j is greater than i, if so, entering step 3-7)；If it is not, then return step 3-4)；
3-7) judge big difference ring Reflector whether set or 10ms timing whether terminate, if so, entering step
4)；If it is not, then entering step 3-8)；
Number of switches m in this ITU 3-8) is counted, n=0 is enabled；
Then 3-9) neighbours' ITU exchanging electric current data of this ITU and neighbours carry out difference current to n-th big difference ring
It calculates；
3-10) judge it is whether faulty in n-th big difference ring, if so, the big difference ring Reflector set of ITU, n-th
A switch fault flag set, enters step 3-11)；If it is not, being then directly entered step 3-11)；
N=n+1 3-11) is enabled, judges whether n is greater than m, if so, entering step 4)；If it is not, then return step 3-9).
Itself difference ring is made of all switches in ITU；Main difference ring is made of the switch that feeder line both ends are connected；Greatly
Difference ring is made of secondary adjacent terminal, i.e. the neighbor terminal composition of this terminal and neighbours, wherein itself difference ring failure criterion:
|i1+i2+…+in|>is.set
In formula, i1、i2…inRespectively to switch the electric current flowed through in itself difference ring；is.setSetting valve is acted for difference current.
Under normal circumstances, according to KCL theorem, itself difference ring starting current (the sum of each on-load switch electric current) is essentially
Zero；If breaking down in itself difference ring, itself difference, which will change starting current (the sum of each on-load switch electric current), to become larger, and be more than
When setting valve, it can determine whether to break down in itself difference ring.
Main difference ring failure criterion:
In formula, ia、ibFor the electric current for flowing through route a side intelligent FTU and the side b intelligent FTU；is.setIt is differential
Electric current acts setting valve；KrelFor safety factor, Krel=1.2；Two formulas more than main difference ring simultaneously satisfaction, can determine whether main difference
It breaks down in ring；
Big difference ring failure criterion:
In formula, ix、iyFor the electric current for flowing through route x side intelligent FTU and the side y intelligent FTU, the side y Intelligent feeder line
Terminal is the neighbours of the side x intelligent FTU neighbours；is.setSetting valve is acted for difference current；KrelFor safety factor, Krel=
1.2；Two formulas more than big difference ring simultaneously satisfaction, can determine whether to break down in big difference ring.
4) enter fault isolation routine, each terminal detects the label shape itself respectively switched in main difference ring and itself difference ring
State, by the switch tripping of faulty label.After network protection starts 110ms, big difference ring remains to detect fault current, then greatly
The breakdown switch tripping of terminal in difference ring.Specific steps are as follows:
The whether set of ITU itself difference ring, main difference ring Reflector 4-1) is judged, if so, entering step 4-
3)；If it is not, then trip signal is issued to all stoppage circuit breakers, subsequently into step 4-2)；
4-2) judge whether that all stoppage circuit breakers trip successfully, if so, Fault Isolation flag set, enters step
5)；If it is not, then entering step 4-3)；
4-3) judging whether 110ms timing terminates and the big difference ring Reflector set of ITU, if so, big difference
Ring Reflector switch trip, enters step 4-4)；If it is not, then entering step 5)；
4-4) judge whether that all stoppage circuit breakers trip successfully, if so, Fault Isolation flag set, enters step
5)；If it is not, being then directly entered step 5).
5) enter single shot reclosing program；After Fault Isolation, whether reclosing is carried out according to prior program configuration determination
Operation.Reclosing 1s need to start after Fault Isolation, close a floodgate first, in accordance with checkout voltage condition, when the breakdown switch side side You Ya
It when without pressure, can close a floodgate, check whether electric current is normal after combined floodgate, if there are still trip fault current immediately.Work as breakdown switch
When there are pressure in two sides, synchronizing close is needed.Reclosing only carries out once.Specific steps are as follows:
5-1) judge whether single shot reclosing function investment and the set of Fault Isolation mark, if it is not, then entering step
6)；If so, entering step 5-2)；
5-2) judge whether 1s timer starts, if so, entering step 5-3)；If it is not, after then starting 1s timer
Enter step 5-3)；
5-3) judge whether 1s timing terminates, if it is not, then entering step 6)；If so, entering step 5-4)；
5-4) judging ITU breakdown switch, whether the side side You Ya is without pressure, if it is not, then entering step 5-5)；If so, into
Enter step 5-6)；
5-5) judging ITU breakdown switch, whether two sides are without pressure, if so, entering step 6), if it is not, then after synchronizing close
It enters step 6)；
It 5-6) closes a floodgate, judges switch whether detect overcurrent again after closing a floodgate, if so, tripping alarm immediately, reports
6) main website, unsuccessful reclosing flag set, enters step；If it is not, then reporting main website, enter step 6).
6) enter load transfer program, if unsuccessful reclosing or reclosing function are not thrown, from the failed terminals of power loss to
Interconnection switch issues load transfer request.If there is multiple interconnection switches on route, according to pre-set combined floodgate priority
It successively issues and turns the EP (end of program) if turning for success for request.Specific steps are as follows:
6-1) judge whether ITU unsuccessful reclosing and the set of Fault Isolation mark and all equal nothings in switch two sides of ITU
Pressure is without stream, or whether ITU does not put into reclosing function and the set of Fault Isolation mark and all equal nothings in switch two sides of ITU
Pressure is without stream, if so, entering step 6-2)；If it is not, then entering step 6-7)；
Preset load transfer priority 6-2) is judged whether there is, if so, entering step 6-3)；If it is not, then to m neighbour
It occupies interconnection switch and sends voltage inquiry request, then the voltage of more each interconnection switch, set priority according to voltage levels, then
Enter step 6-3)；
Order of closing a floodgate 6-3) is issued to highest priority interconnection switch, enters step 6-4)；
Closing success signal 6-4) is waited, judges whether to receive combined floodgate failure signal, if so, entering step 6-6)；If
It is no, then enter step 6-5:
6-5) judge whether switch two sides voltage and current is normal, if so, sending closing success signal to main website, into step
It is rapid 7)；If it is not, then interconnection switch trips, 6-6 is entered step)；
6-6) judge whether to traverse all interconnection switches, if so, alarm, reports main website, load transfer failure, into step
It is rapid 7)；If it is not, then sending request of closing a floodgate, and return step 6-4 to next interconnection switch)；
6-7) judge whether to have interconnection switch in ITU and be requested by load transfer, if so, entering step 6-8)；If
It is no, then it enters step 7)；
The whether faulty mark of interconnection switch 6-8) is judged, if so, returning to failure of closing a floodgate to load transfer request source
Signal is latched this interconnection switch and turns for function, subsequently into step 7)；If it is not, then issuing order of closing a floodgate to interconnection switch, enter
Step 6-9)；
6-9) judge whether interconnection switch tripping, if so, returning to combined floodgate failure signal to load transfer request source, closes
This interconnection switch is locked to turn for function, subsequently into step 7)；If it is not, then starting closing success signal to main website, subsequently into step
It is rapid 7).
7) enter flag bit reset routine；
8) EP (end of program).
The case where present invention is calculated using peer to peer network and difference current, and all switch is breaker in distribution
Under, fault location can be completed in 40ms, and Fault Isolation is completed in 110ms, completes load transfer in 2s, is matched than most of at present
Electric network protection product is all fast, and accuracy rate is higher.
Claims (8)
1. a kind of intelligent distribution network self-healing control method based on peer-to-peer communication network, comprising the following steps:
1) intelligent FTU is periodically detected whether route is normal, and if normal, then each intelligent FTU executes periodically certainly
2) inspection, then enters step if abnormal,；
2) network protection starting judgement, if not meeting start-up criterion, EP (end of program) are carried out；If meeting start-up criterion, activate
3) network protection program, enters step；Step 2) the specific steps are
2-1) judge whether active flag set, if so, entering step 3)；If it is not, then entering step 2-2)；
2-2) judge whether to meet and hide criterion of shoving, if so, 3) flag set of shoving, enters step；Hide if it is not, then removing
The mark that shoves is kept away, open and protection function enters step 2-3)；
2-3) judge whether to meet overcurrent criterion and be unsatisfactory for short-circuit criterion, if so, to System Reports state, subsequently into step
It is rapid 3)；If it is not, then entering step 2-4)；
2-4) judge whether to meet short-circuit criterion or decompression criterion, if so, network protection active flag set, to System Reports
State starts 110ms timer, subsequently into step 3)；If it is not, then entering step 2-5)；
2-5) judge whether to meet ground connection criterion, if so, single-phase earthing flag set, to System Reports state, subsequently into
Step 3)；If it is not, being then directly entered step 3)；
3) enter fault locating program, judge the whether set of Fault Isolation mark, if it is not, then enter step 4), if so,
It enters step 5)；
4) enter fault isolation routine；
5) enter single shot reclosing program；Judge whether reclosing succeeds, if it is not, then entering step 6), if so, entering step
7)；
6) enter load transfer program；
7) enter flag bit reset routine；
8) EP (end of program).
2. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, feature exist
In: in the step 1), when route is normal, intelligent FTU executes periodical self-test, intelligent FTU inspection and neighbour
The communication condition in residence, if only side neighbours cannot communicate, the neighbours that cannot communicate side neighbours are new as oneself
Neighbor terminal, each terminal update network topological information.
3. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, feature exist
In: in the step 2), protection starting judges that criterion includes overcurrent adjusting, short circuit current is adjusted, decompression judges and shove to sentence
It is disconnected, in which:
Overcurrent adjusting:
I > Ioc.op=KrelIoc.max
In formula, I is line current measured value, Ioc.opFor overcurrent action value, Ioc.maxFor maximum load current, KrelTo be reliably
Number, Krel=1.2；
Short circuit current adjusting:
In formula, I is the measured value of line current；Ik.opFor short circuit current action value；E is system emf phase；ZsFor terminal to change
Line impedance between power station；ZkFor the impedance between intelligence terminal and neighbor terminal；KrelFor safety factor, Krel=1.2；
C. decompression judges:
U is terminal voltage measured value in formula；UopFor decompression action value；UminFor the minimum voltage being likely to occur in operation, Umin=
0.5Un, UnFor system nominal voltage, for 10kV power distribution network, Un=10kV；KrelFor safety factor, Krel=1.2；
D. it shoves judgement:
In formula, η is the secondary harmonic component of line current, and I is the measured value of line current, I2thFor in line current measured value
Second harmonic component can determine whether that route shoves when second harmonic current content is more than 15%.
4. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, feature exist
In: the step 3) the specific steps are
The whether set of itself difference ring, main difference ring Reflector 3-1) is judged, if so, entering step 3-7)；If it is not,
Then start 10ms timer, carry out the calculating of itself difference ring difference current, enter step 3-2)；
3-2) judge it is whether faulty in itself difference ring, if so, itself difference ring Reflector set, all switch faults
Flag set enters step 3-7)；If it is not, then entering step 3-3)；
Number of switches i in this intelligent FTU 3-3) is counted, j=0 is enabled；
Then 3-4) this intelligent FTU and neighbours' intelligent FTU exchanging electric current data carry out j-th of main difference ring
Difference current calculates；
3-5) judge it is whether faulty in j-th of main difference ring, if so, the main difference ring Reflector of intelligent FTU is set
Position, j-th of switch fault flag set enter step 3-6)；If it is not, being then directly entered step 3-6)；
J=j+1 3-6) is enabled, judges whether j is greater than i, if so, entering step 3-7)；If it is not, then return step 3-4)；
3-7) judge big difference ring Reflector whether set or 10ms timing whether terminate, if so, entering step 4)；If
It is no, then enter step 3-8)；
Number of switches m in this intelligent FTU 3-8) is counted, n=0 is enabled；
3-9) neighbours' intelligent FTU exchanging electric current data of this intelligent FTU and neighbours, then to n-th big difference
Ring carries out difference current calculating；
3-10) judge it is whether faulty in n-th big difference ring, if so, the big difference ring Reflector of intelligent FTU is set
Position, n-th of switch fault flag set enter step 3-11)；If it is not, being then directly entered step 3-11)；
N=n+1 3-11) is enabled, judges whether n is greater than m, if so, entering step 4)；If it is not, then return step 3-9).
5. the intelligent distribution network self-healing control method according to claim 4 based on peer-to-peer communication network, feature exist
In: in the step 3), itself difference ring is made of all switches in intelligent FTU；Main difference ring is by feeder line both ends institute
The switch of connection forms；Big difference ring is made of secondary adjacent terminal, i.e. the neighbor terminal composition of this terminal and neighbours, wherein certainly
Body difference ring failure criterion:
|i1+i2+…+in| > is.set
In formula, i1、i2…inRespectively to switch the electric current flowed through in itself difference ring；is.setSetting valve is acted for difference current；
Main difference ring failure criterion:
In formula, ia、ibFor the electric current for flowing through route a side intelligent FTU and the side b intelligent FTU；is.setFor difference current
Act setting valve；KrelFor safety factor, Krel=1.2；Two formulas more than main difference ring simultaneously satisfaction, can determine whether in main difference ring
It breaks down；
Big difference ring failure criterion:
In formula, ix、iyFor the electric current for flowing through route x side intelligent FTU and the side y intelligent FTU, the side y intelligent FTU
For the neighbours of the side x intelligent FTU neighbours；is.setSetting valve is acted for difference current；KrelFor safety factor, Krel=1.2；
Two formulas more than big difference ring simultaneously satisfaction, can determine whether to break down in big difference ring.
6. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, feature exist
In: the step 4) the specific steps are
The whether set of intelligent FTU itself difference ring, main difference ring Reflector 4-1) is judged, if so, entering step
Rapid 4-3)；If it is not, then trip signal is issued to all stoppage circuit breakers, subsequently into step 4-2)；
4-2) judge whether that all stoppage circuit breakers trip successfully, if so, 5) Fault Isolation flag set, enters step；If
It is no, then enter step 4-3)；
4-3) judging whether 110ms timing terminates and the big difference ring Reflector set of intelligent FTU, if so, greatly
Difference ring Reflector switch trip, enters step 4-4)；If it is not, then entering step 5)；
4-4) judge whether that all stoppage circuit breakers trip successfully, if so, 5) Fault Isolation flag set, enters step；If
It is no, then it is directly entered step 5).
7. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, feature exist
In: the step 5) the specific steps are
5-1) judge whether single shot reclosing function investment and the set of Fault Isolation mark, if it is not, then entering step 6)；If
It is then to enter step 5-2)；
5-2) judge whether 1s timer starts, if so, entering step 5-3)；If it is not, entering after then starting 1s timer
Step 5-3)；
5-3) judge whether 1s timing terminates, if it is not, then entering step 6)；If so, entering step 5-4)；
5-4) judging intelligent FTU breakdown switch, whether the side side You Ya is without pressure, if it is not, then entering step 5-5)；If
It is then to enter step 5-6)；
5-5) judging intelligent FTU breakdown switch, whether two sides are without pressure, if so, entering step 6), if it is not, then examining the same period
It is entered step 6) after combined floodgate；
It 5-6) closes a floodgate, judges switch whether detect overcurrent again after closing a floodgate, if so, tripping alarm immediately, reports main website,
6) unsuccessful reclosing flag set, enters step；If it is not, then reporting main website, enter step 6).
8. the intelligent distribution network self-healing control method according to claim 1 based on peer-to-peer communication network, feature exist
In: the step 6) the specific steps are
6-1) judge whether intelligent FTU unsuccessful reclosing and the set of Fault Isolation mark and intelligent FTU institute
There are switch two sides without pressure without stream, or whether intelligent FTU does not put into reclosing function and Fault Isolation mark has been set
Position and all switch two sides of intelligent FTU without press without stream, if so, entering step 6-2)；If it is not, then entering step 6-
7)；
Preset load transfer priority 6-2) is judged whether there is, if so, entering step 6-3)；If it is not, then joining to m neighbours
Network switch sends voltage inquiry request, then the voltage of more each interconnection switch, sets priority according to voltage levels, enters back into
Step 6-3)；
Order of closing a floodgate 6-3) is issued to highest priority interconnection switch, enters step 6-4)；
Closing success signal 6-4) is waited, judges whether to receive combined floodgate failure signal, if so, entering step 6-6)；If it is not, then
Enter step 6-5:
6-5) judge whether switch two sides voltage and current is normal, if so, sending closing success signal to main website, enters step
7)；If it is not, then interconnection switch trips, 6-6 is entered step)；
6-6) judge whether to traverse all interconnection switches, if so, alarm, reports main website, load transfer failure is entered step
7)；If it is not, then sending request of closing a floodgate, and return step 6-4 to next interconnection switch)；
6-7) judge whether to have interconnection switch in intelligent FTU and be requested by load transfer, if so, entering step 6-
8)；If it is not, then entering step 7)；
6-8) judge the whether faulty mark of interconnection switch, if so, combined floodgate failure signal is returned to load transfer request source,
This interconnection switch is latched to turn for function, subsequently into step 7)；If it is not, then issuing order of closing a floodgate to interconnection switch, enter step
6-9)；
6-9) judge whether interconnection switch tripping, if so, returning to combined floodgate failure signal to load transfer request source, locking is originally
Interconnection switch turns for function, subsequently into step 7)；If it is not, then starting closing success signal to main website, subsequently into step 7).
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| CN107196279B (en) * | 2017-07-19 | 2019-04-30 | 湖南世优电力科技股份有限公司 | Intelligent distribution network resultant fault localization method |
| CN108169625A (en) * | 2017-12-28 | 2018-06-15 | 国网江苏省电力有限公司南京供电分公司 | A kind of distribution feed line automatization terminal and distribution line failure localization method |
| CN108683161B (en) * | 2018-05-31 | 2020-04-03 | 湖南世优电力科技股份有限公司 | Differential backup protection method applied to intelligent power distribution network |
| CN110703135B (en) * | 2019-10-18 | 2021-10-29 | 国网福建省电力有限公司 | Full study and judgment method for fault handling of power distribution network |
| CN111208382B (en) * | 2020-04-23 | 2020-08-11 | 广州思泰信息技术有限公司 | Electric power self-healing test method, device, system, main station and tester |
| CN111505442B (en) * | 2020-05-06 | 2022-02-01 | 北京科锐配电自动化股份有限公司 | Power distribution network fault processing method based on peer-to-peer communication |
| CN111952929B (en) * | 2020-08-13 | 2022-08-16 | 广东电网有限责任公司 | Self-healing false switching-on judgment method and device for distribution network feeder automation terminal |
| CN112134263B (en) * | 2020-08-20 | 2022-08-19 | 南京因泰莱电器股份有限公司 | Distribution network self-healing method based on peer-to-peer information interaction |
| CN112421615A (en) * | 2020-11-05 | 2021-02-26 | 江苏其厚智能电气设备有限公司 | Power distribution station self-healing control method and system based on intelligent breaker action |
| CN113890190A (en) * | 2021-09-28 | 2022-01-04 | 广东电网有限责任公司 | Method, device and medium for cooperative self-healing of intelligent distributed terminal and distribution network master station |
| CN114256749A (en) * | 2021-12-24 | 2022-03-29 | 深圳供电局有限公司 | Power distribution network controller |
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