CN110514965A - A kind of multiple-limb electrical power distribution network fault location method using sets match method - Google Patents

A kind of multiple-limb electrical power distribution network fault location method using sets match method Download PDF

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CN110514965A
CN110514965A CN201910842166.0A CN201910842166A CN110514965A CN 110514965 A CN110514965 A CN 110514965A CN 201910842166 A CN201910842166 A CN 201910842166A CN 110514965 A CN110514965 A CN 110514965A
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ftu
fault
power distribution
route
limb
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CN110514965B (en
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束洪春
饶鸿江
常勇
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Kunming University of Science and Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/088—Aspects of digital computing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Locating Faults (AREA)

Abstract

The present invention relates to a kind of multiple-limb electrical power distribution network fault location methods using sets match method, belong to Relay Protection Technology in Power System field.The number for determining set element by branch node number first is arranged three kinds of operating modes to feeder unit terminal (FTU) device, considers fault current direction, branch node phase connecting lines FTU operating mode value is added, constitutes set lz, lzEach element in set is respectively the sum of different branch node phase connecting lines FTU operating mode values；Then, different section and branch's failure are successively simulated, corresponding fault verification L is establishedg；Finally, establishing failure collection l according to FTU upload information to main station systemzf, using matching method in fault verification LgIn be matched to corresponding set lx, so that it may judge fault section route and branched line.

Description

A kind of multiple-limb electrical power distribution network fault location method using sets match method
Technical field
The present invention relates to a kind of multiple-limb electrical power distribution network fault location method using sets match method, belong to electric system after Electric protection technical field.
Background technique
Distribution network failure is quick, is accurately positioned and faulty line is isolated, and fast recovery of power supply plays an important role, Ke Yiti High power distribution network reliability of operation.Multiple-limb distribution net work structure is complicated, and fault location is more difficult, and especially rural area multiple-limb is matched Natural conditions locating for power grid are complicated and changeable, and the probability that breaks down is big, and trouble shoot is difficult, generally require artificial telemetry link insulation Value, a section searches failure, and the debugging time increases, reduces sustainable power-on time, bring economic loss.Utilize traveling wave method Although specific abort situation can be calculated by carrying out fault location, there is faster response speed and higher range accuracy, it is right In multiple-limb power distribution network, required installing traveling-wave device number is more, and cost of investment is big, if utilizing the single-ended method of traveling wave or the event of both-end method Barrier positioning, failure Mintrop wave head and fault point transmitted wave complexity are difficult in multiple-limb power distribution network.Techniques of feeder terminal unit in power distribution network list First FTU is gradually popularized, and is proposed the distribution network failure positioning based on matrix algorithm, is utilized FTU upload information binding member equipment structure Fault message matrix is built, according to criterion positioning failure section, but matrix algorithm dimension is high, and criterion is complicated.Furthermore a variety of artificial intelligence The introducing of energy algorithm improves the efficiency of fault location in various degree, and operand is larger, programming complexity, not simple and quick enough.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of multiple-limb distribution network failure positioning using sets match method Method, with to solve the above technical problems.
The technical scheme is that a kind of multiple-limb electrical power distribution network fault location method using sets match method, first The number that set element is determined by branch node number is arranged three kinds of operating modes to feeder unit terminal (FTU), considers failure Current direction is added branch node phase connecting lines FTU operating mode value, constitutes set lz, lzEach element difference in set For the sum of different branch node phase connecting lines FTU operating mode values；Then, different section and branch's failure are successively simulated, is built Found corresponding fault verification Lg；Finally, establishing failure collection l according to the information that feeder unit terminal uploads to main station systemzf, benefit With matching method in fault verification LgIn be matched to corresponding set lx, so that it may judge fault section route and branched line.
Specific steps are as follows:
Step1: determining the number of element in set, and the number for counting lines branch node along lines branch determines in set Element number；
Step2: considering fault current direction, and FTU operating mode, the more electrical power distribution nets of multiple-limb are arranged；Fault current side To for positive direction, then in mode 1, corresponding mode value is 1 for FTU work；Fault current direction is opposite direction, then FTU work exists Mode -1, corresponding mode value are -1；Route is normal, then for feeder unit terminal works in mode 0, corresponding mode value is 0；It is more Branch's single supply power distribution network tail end line FTU operating mode is set as 2, -1,0, and fault current direction is positive direction, then FTU works In mode 2, corresponding mode value is 2；Fault current direction is opposite direction, then FTU work is in mode -1, corresponding mode value It is -1；Normally then in mode 0, corresponding mode value is 0 to route for FTU work；Multiple-limb single supply power distribution network non-end route FTU The more electrical power distribution nets of operating mode and multiple-limb are identical；
Step3: being added branch node phase connecting lines FTU operating mode value, constitutes set lz, lzEach member in set Element value is respectively the sum of different branch node phase connecting lines FTU operating mode values, can be obtained using formula (1), (2):
lz={ N1,N2,N3,...,Nn} (1)
In formula, N1、N2、...、NnRespectively node 1,2 ..., the sum of N phase connecting lines FTU device operating mode value；n1、 n2、...、n3n+2All FTU associative mode values respectively on route；lzWhen=0, line work is normal；
Step4: fault verification L is establishedg, different section and branch's failure, including multiple failure are simulated, according to Step3, Obtain the fault verification L containing m set elementg:
Lg={ l1,l2,l3,...,lx,lm} (3)
Step5: judging fault section route and branched line, after breaking down ca bin FTU upload information to Main station system obtains failure collection l according to Step3zf, according to (3) formula, judged using matching method:
If lzf=lx,It can then obtain fault section route and branched line.
The beneficial effects of the present invention are:
(1) the information architecture failure collection l of main station system is uploaded to using ca bin FTUzfIn conjunction with matching method In fault verification LgIn be matched to corresponding set lx, the method is few using element, and programming is simple, and committed memory is small, and it is easy to accomplish, Improve the efficiency of fault location.
(2) failure collection l is utilizedzfMatch fault verification LgObtain corresponding set lx, that is, can recognize fault section route and The method of branched line can accurately identify failure to multiple-limb single supply power distribution network or the more electrical power distribution net failures of multiple-limb Section route and branched line reduce artificial line walking time, fast recovery of power supply, thus improve power distribution network power supply reliability and Reduce economic loss.
Detailed description of the invention
Fig. 1 is multiple-limb dual power supply power distribution network figure of the present invention；
Fig. 2 is multiple-limb double voltage control fault verification L of the present inventiong1Set figure；
Fig. 3 is multiple-limb single supply power distribution network figure of the present invention；
Fig. 4 is multiple-limb radial supply line fault verification L of the present inventiong2Set figure.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1: multiple-limb dual power supply power distribution network as shown in Fig. 1 is established.The positive direction of electric current is as shown in Figure 1, A, B For line bus, solid black dot is feeder unit terminal (FTU), l1To l7Respectively section route and branched line, branch Node is denoted as node 1, node 2, node 3, n respectively1To n11For the corresponding operating mode value of FTU.Now set section l2Route and point Branch l7Line fault.
(1) according to Step1 in specification: determining set lzMiddle element number counts lines branch node along lines branch Number determine set lzMiddle element number is 3；
(2) according to Step2 in specification: setting feeder unit terminal FTU operating mode considers fault current direction, right Multiple-limb dual power supply power distribution network, FTU operating mode are set as 1, -1,0.Fault current direction is positive direction, then FTU work is in mould Formula 1, corresponding mode value are 1；Fault current direction is opposite direction, then in mode -1, corresponding mode value is -1 for FTU work； Normally then in mode 0, corresponding mode value is 0 to route for FTU work.
(3) according to Step3 in specification: constituting set lz:
lz={ N1,N2,N3,...,Nn} (1)
(4) according to Step4 in specification: establishing fault verification Lg, different section and branch's failure are simulated, including multiple Failure obtains the fault verification L gathered containing 39g1, as shown in Figure 2.
(5) according to Step5 in specification: after line failure ca bin FTU upload information to main station system, Obtain failure collection lzf={ 2, -2, -3 }；Using matching method, if lzf=l2-l7,It can then obtain faulty section Section is l2Route, fault branch l7Route.
Embodiment 2: multiple-limb single supply power distribution network as shown in Fig. 1 is established.The positive direction of electric current is as shown in figure 3, A is Line bus, solid black dot are feeder unit terminal (FTU), l1To l7Respectively section route and branched line, branch's section Point is denoted as node 1, node 2, node 3, n respectively1To n10For the corresponding operating mode value of FTU.Now set section l3Route and branch l6 Line fault.
(1) according to Step1 in specification: determining set lzMiddle element number counts lines branch node along lines branch Number determine set lzMiddle element number is 3；
(2) according to Step2 in specification: setting feeder unit terminal FTU operating mode considers fault current direction, right Multiple-limb single supply power distribution network non-end route, FTU operating mode are set as 1, -1,0；The setting of tail end line FTU operating mode It is 2, -1,0.Non-end line fault current direction is positive direction, and in mode 1, corresponding mode value is 1 for FTU work；Failure electricity Stream direction is opposite direction, then in mode -1, corresponding mode value is -1 for FTU work；Normally then FTU work is right in mode 0 for route The mode value answered is 0.Latter end line fault current direction is positive direction, then in mode 2, corresponding mode value is 2 for FTU work； Fault current direction is opposite direction, then in mode -1, corresponding mode value is -1 for FTU work, and normally then FTU's route works in mould Formula 0, corresponding mode value are 0.
(3) according to Step3 in specification: constituting set lz:
lz={ N1,N2,N3,...,Nn} (1)
(4) according to Step4 in specification: establishing fault verification Lg, different section and branch's failure are simulated, including multiple Failure obtains the fault verification L gathered containing 21g2, as shown in Figure 4.
(5) according to Step5 in specification: after line failure ca bin FTU upload information to main station system, Obtain failure collection lzf={ 4,4,1 }；Using matching method, if lzf=l3-l6,It can then obtain fault section For l3Route, fault branch l6Route.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept Put that various changes can be made.

Claims (2)

1. a kind of multiple-limb electrical power distribution network fault location method using sets match method, it is characterised in that: first by branch node Number determines the number of set element, and three kinds of operating modes are arranged to FTU device, fault current direction are considered, branch node Phase connecting lines FTU operating mode value is added, and constitutes set lz, lzEach element in set is respectively that different branch nodes are connected The sum of route FTU operating mode value；Then, different section and branch's failure are successively simulated, corresponding fault verification L is establishedg； Finally, establishing failure collection l according to the information that feeder unit terminal uploads to main station systemzf, using matching method in fault verification LgIn be matched to corresponding set lx, judge fault section route and branched line.
2. the multiple-limb electrical power distribution network fault location method according to claim 1 using sets match method, it is characterised in that Specific steps are as follows:
Step1: determining the number of element in set, and the number for counting lines branch node along lines branch determines element in set Number；
Step2: considering fault current direction, and FTU operating mode, the more electrical power distribution nets of multiple-limb are arranged；Fault current direction is Positive direction, then in mode 1, corresponding mode value is 1 for FTU work；Fault current direction is opposite direction, then FTU work is in mode- 1, corresponding mode value is -1；Route is normal, then for feeder unit terminal works in mode 0, corresponding mode value is 0；Multiple-limb Single supply power distribution network tail end line FTU operating mode is set as 2, -1,0, and fault current direction is positive direction, then FTU work is in mould Formula 2, corresponding mode value are 2；Fault current direction is opposite direction, then in mode -1, corresponding mode value is -1 for FTU work； Normally then in mode 0, corresponding mode value is 0 to route for FTU work；Multiple-limb single supply power distribution network non-end route FTU work The more electrical power distribution nets of mode and multiple-limb are identical；
Step3: being added branch node phase connecting lines FTU operating mode value, constitutes set lz, lzEach element value in set The sum of respectively different branch node phase connecting lines FTU operating mode values, can be obtained using formula (1), (2):
lz={ N1,N2,N3,...,Nn} (1)
In formula, N1、N2、...、NnRespectively node 1,2 ..., the sum of N phase connecting lines FTU device operating mode value；n1、 n2、...、n3n+2All FTU associative mode values respectively on route；lzWhen=0, line work is normal；
Step4: fault verification L is establishedg, different section and branch's failure are simulated, including multiple failure is obtained according to Step3 Fault verification L containing m set elementg:
Lg={ l1,l2,l3,...,lx,lm} (3)
Step5: judging fault section route and branched line, and ca bin FTU upload information is to main website after breaking down System obtains failure collection l according to Step3zf, according to (3) formula, judged using matching method:
If lzf=lx,It can then obtain fault section route and branched line.
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