CN107611942A - The intelligent distribution network fault location and restoration methods of a kind of combining form method - Google Patents
The intelligent distribution network fault location and restoration methods of a kind of combining form method Download PDFInfo
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- CN107611942A CN107611942A CN201710754670.6A CN201710754670A CN107611942A CN 107611942 A CN107611942 A CN 107611942A CN 201710754670 A CN201710754670 A CN 201710754670A CN 107611942 A CN107611942 A CN 107611942A
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Abstract
The invention discloses a kind of intelligent distribution network fault location of combining form method and restoration methods, comprise the following steps：1）Subarea processing, power distribution network is divided into active trunk and passive leg, subregion reliability is verified by formalization method；2）Solution space dimensionality reduction, generation contact ring matrix simultaneously reconstruct power distribution network coding, reject trivial solution, dimensionality reduction reasonability is verified by formalization method；3）Fault message is changed, and line fault information is converted into switch fault current information according to switch function；4）By heuritic approach optimizing, initial solution storehouse is established, global quick optimizing is carried out according to object function, passes through formalization method verification algorithm logical correctness；5）Carry out the stage recovery of distribution network failure.Formalization method is used in distribution network failure positioning and fault recovery method, Formal Verification is carried out to key characteristic in method and process, fundamentally ensure that the reasonable effective of method.
Description
Technical field
The present invention relates to intelligent distribution network fault location and recovery technology field, and in particular to a kind of combining form method
Intelligent distribution network fault location and restoration methods.
Background technology
Intelligent distribution network fault location and fault recovery technology are one of major functions of power distribution automation, and power distribution network
Realize the basis of self-healing.The access of distributed power source brings and significantly affected on distribution network failure positioning and fault recovery with application,
Short circuit current is distributed when trend distribution when changing conventional electrical distribution net normal operation and failure, radial suitable for single supply
Fault location has no longer been applicable with fault recovery method.
Conventional failure location algorithm is concentrated mainly on direct algorithm and two angles of Explicit Algorithm, including：Matrix algorithm, intelligence
Can colony's algorithm and neural network algorithm.Distribution network failure recovers to require that recovery time is short, recovery dead electricity load is more, topological structure
System safety operation after keeping radial and recovering.At present, fault recovery method focus primarily upon heuristic search and
Intelligent optimization method both direction.
The conventional method of proving program logic, which concentrates on, tests and simulates both direction, and its intrinsic latent defect is can only
It was found that logical process has wrong special case, but inherently proof logic process can not there is no mistake, it, which is performed often, has not
Certainty.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of intelligent distribution network fault location of combining form method with
Restoration methods, it can fundamentally ensure that the logical process of intelligent distribution network fault location and restoration methods is correctly reliable.
The present invention is achieved through the following technical solutions：
The intelligent distribution network fault location and restoration methods of a kind of combining form method, comprise the following steps：
1）Subarea processing, power distribution network is divided into active trunk and passive leg, verifies that subregion can by formalization method
By property；
2）Solution space dimensionality reduction, generation contact ring matrix simultaneously reconstruct power distribution network coding, reject trivial solution, verified by formalization method
Dimensionality reduction reasonability；
3）Fault message is changed, and line fault information is converted into switch fault current information according to switch function；
4）By heuritic approach optimizing, initial solution storehouse is established, global quick optimizing is carried out according to object function, passes through formalization
Method validation algorithm logic correctness；
5）Carry out the stage recovery of distribution network failure.
The further scheme of the present invention is the step 1）It is the topology information based on power distribution network, distributed energy access
Information and fault current information, power distribution network is divided into active trunk and passive leg.
The further scheme of the present invention is the step 4）For fault current information is normal, fault current information have it is abnormal
Become missing, single fault and multiple faults situation, by switch function and object function, power distribution network subregion is realized by heuritic approach
The fault location of domain processing.
The further scheme of the present invention is that the object function uses XOR.
The further scheme of the present invention is that the heuritic approach uses random search.
The further scheme of the present invention is the step 2）Generation contact ring matrix includes effective initial solution storehouse and new explanation
Generation, reconstruct coding rule.
The further scheme of the present invention is that the reconstruct power distribution network coding rule is to go out in-degree to power distribution network according to node
Simplified, the coded system mixed using the decimal system with binary system carries out power distribution network reconfiguration coding.
The further scheme of the present invention is the step 5）Failure phase formula recover to include step in detail below：
S1：Data prepare；The block switch information that power distribution network isolated fault is cut-off, real time fail is matched with contingency set,
Seek to plan isolated island scheme；
S2：Recover non-faulting network connectivty using heuristic rule, to rest network, recover to lose by the closure of interconnection switch
Electric region and the maximum connectivity of charging zone；
S3：It is reconstructed as target using power distribution network node voltage offset and line load rate, is opened for the not operating contacts of S2
Close and block switch carries out Topological expansion, recover power distribution network safety in operation, and with formalization method checking network weight
Structure optimization process is rationally reliable；
S4：Cutting load, if S3 reconfiguration scheme can not be completely eliminated, node voltage amplitude is out-of-limit and circuit overload problem, adopts
Cutting load is carried out with Depth Priority Searching combination load priority, reaches safe operation state to system.
The further scheme of the present invention is the stage recovery process of distribution network failure to be included into four-stage, with each stage
The change of the folding condition of switch is turned to state variable, using the amplitude of node voltage and line load rate as step function,
Each stage determines whether to perform by index.
The present invention compared with prior art the advantages of be：
First, it is right based on the fault current information with directionality, meter and distributed power source fault current switch function and evaluation function
Power distribution network network containing distributed power source has carried out region division, shortens coding, the searching algorithm of foundation can quickly, accurately
Ground global optimizing, fault location is carried out, can effectively realize the fault location under different situations, speed and accuracy rate are all higher；
And for there is the information of distortion, fault location can also be realized to a certain extent；
2nd, by analyze closed loop design, open loop operation distribution net work structure, avoid trivial solution during the power distribution network reconfiguration of proposition
Coding method, the solution for running counter to topological constraints can not be produced in whole search procedure, and overall optimal solution can be found out, compared with
Conventional method speed greatly improves.
3rd, formalization method is used in distribution network failure positioning and fault recovery method, to algorithm logic in method,
The key characteristics such as network topology, power distribution network reconfiguration, subarea processing and solution space dimensionality reduction and process carry out Formal Verification, from root
The reasonable effective of method is ensure that in sheet.
Brief description of the drawings
Fig. 1 is the general frame figure of the present invention.
Fig. 2 is the stage method flow diagram of fault recovery of the present invention.
Embodiment
The intelligent distribution network fault location and restoration methods of a kind of combining form method as shown in Figure 1, including it is following
Step：
1）Subarea processing, the topology information based on power distribution network, distributed energy access information and fault current information, by distribution
Net is divided into active trunk and passive leg, and the non-faulty current branch road of tip is rejected, and is not encoded in Algorithm for Solving, drop
The dimension of low understanding, fault location speed is substantially increased, subregion reliability is verified by formalization method；
2）Constrained with system load flow, node voltage constraint and network topology are constrained to constraints, propping up road-load capacity with the overall situation accounts for
Maximum carries Capacity Ratio and is minimised as optimization aim, solution space dimensionality reduction, generation contact ring matrix, including effective initial solution storehouse and new explanation
Generation, reconstruct coding rule, power distribution network is simplified according to the in-degree that goes out of node, mixed using the decimal system with binary system
Coded system carries out power distribution network reconfiguration coding, rejects trivial solution, verifies dimensionality reduction reasonability by formalization method, it is ensured that evade not
Meet the reasonability of topological constraints solution, and the accessibility of overall optimal solution；The reconstruction method of power distribution network arithmetic speed is fast, institute
The computing resource and memory space needed is smaller, fault location and recovery suitable for large-scale distribution network, additionally it is possible to entirely searching
The solution for being unsatisfactory for topological constraints is not produced during rope, and overall optimal solution can be found out, compared with conventional method speed faster；
3）Fault message is changed, and line fault information is converted into switch fault current information according to switch function；
4）For fault current information is normal, fault current information has distortion missing, single fault and multiple faults situation, by switch
Function and object function, by heuritic approach optimizing, initial solution storehouse is established, global quick optimizing is carried out according to object function,
Pass through formalization method verification algorithm logical correctness；The object function uses XOR, directly affects fault location
Accuracy and fault-tolerant ability；The heuritic approach replaces gradient search using random search, it is not necessary to derivation information, and the calculation
Method considers all solutions and generates a new explanation, and speed of searching optimization is fast.By carrying out formalized description and inspection to algorithm logic, really
Protect the validity of heuritic approach optimizing；
5）The stage recovery of distribution network failure is carried out, recovery process includes four-stage, with the folding condition of each stage switch
Change is turned to state variable, passes through index using the amplitude of node voltage and line load rate as step function, each stage
Determine whether to perform；Including following specific steps as shown in Figure 2：
S1：Data prepare；The block switch information that power distribution network isolated fault is cut-off, real time fail is matched with contingency set,
Seek to plan isolated island scheme；
S2：Recover non-faulting network connectivty using heuristic rule, to rest network, recover to lose by the closure of interconnection switch
Electric region and the maximum connectivity of charging zone；
S3：It is reconstructed as target using power distribution network node voltage offset and line load rate, is opened for the not operating contacts of S2
Close and block switch carries out Topological expansion, recover power distribution network safety in operation, and with formalization method checking network weight
Structure optimization process is rationally reliable；
S4：Cutting load, if S3 reconfiguration scheme can not be completely eliminated, node voltage amplitude is out-of-limit and circuit overload problem, adopts
Cutting load is carried out with Depth Priority Searching combination load priority, reaches safe operation state to system.
Using as far as possible reply critical loads as object function it is as follows, whereinFor dead electricity loadSize,
For dead electricity loadWeight coefficient, represent the priority of load,Represent all load aggregations not restored electricity：
,
Constraints is as follows：
（1）Trend constraint：
,
Wherein,For nodeInjecting power,WithFor nodeVoltage,For nodeBetween transadmittance.
（2）Tributary capacity constrains：
,
Wherein,To flow through branch roadActive power,For branch roadMaximum capacity.
（3）Node voltage constrains：
,
Wherein,WithFor nodeThe bound of voltage magnitude.
（4）The radial constraint of network：
,
Wherein,For the region to have restored electricity,To ensure the set of the radial topological structure of network.The radial constraint of network
Ensured by formalization method.
The stage fault recovery method uses two key indexs：Line load rate and node voltage offset.
In the stage fault recovery S3, the method for recovering power distribution network safe operation props up road-load capacity accounting most with the overall situation
It is small to turn to target, in the case where system load flow constraint, node voltage constraint, network topology constrain three constraints limitations, carry out deep
Spend Optimum search.Optimization object function can as shown by the following formula,For the circuitry number of closure,WithFor branch roadWhen front bearing is held
Amount and maximum load capacity.
,
Three constraintss are：
System load flow constrains：,
Node voltage constrains：,
Network topology constrains：Network structure keeps connective, and radially.Network topology rule is ensured by formalization method.
In summary, the present invention considers distributed energy and largely accesses intelligent distribution network to fault location and fault recovery
The influence brought, combining form method, it is proposed that the fault location side for being combined heuristic rule algorithm with intelligent algorithm
Method, and stage fault recovery method, and by formalization method to the crucial mistake in the fault location and restoration methods
Journey and characteristic verified, fundamentally the correctness of method of assuring.Fault location of the present invention and restoration methods are abundant
Distributed power source plan isolated island make use of to recover the advantage in critical load region, it is further contemplated that optimization network structure ensures the peace of system
Full stable operation, fault location speed, accuracy are high, serious forgiveness is good, and fault recovery scheme is more excellent.Methods described passes through shape
Formula chemical examination card, it is ensured that validity and reasonability in logic, there is higher application value.
Claims (9)
1. the intelligent distribution network fault location and restoration methods of a kind of combining form method, it is characterised in that including following step
Suddenly：
1）Subarea processing, power distribution network is divided into active trunk and passive leg, verifies that subregion can by formalization method
By property；
2）Solution space dimensionality reduction, generation contact ring matrix simultaneously reconstruct power distribution network coding, reject trivial solution, verified by formalization method
Dimensionality reduction reasonability；
3）Fault message is changed, and line fault information is converted into switch fault current information according to switch function；
4）By heuritic approach optimizing, initial solution storehouse is established, global quick optimizing is carried out according to object function, passes through formalization
Method validation algorithm logic correctness；
5）Carry out the stage recovery of distribution network failure.
2. the intelligent distribution network fault location and restoration methods of a kind of combining form method as claimed in claim 1, it is special
Sign is：The step 1）It is the topology information based on power distribution network, distributed energy access information and fault current information, will matches somebody with somebody
Power network is divided into active trunk and passive leg.
3. the intelligent distribution network fault location and restoration methods of a kind of combining form method as claimed in claim 1, it is special
Sign is：The step 4）For fault current information is normal, fault current information has distortion missing, single fault and multiple faults
Situation, by switch function and object function, the fault location of power distribution network subarea processing is realized by heuritic approach.
4. the intelligent distribution network fault location and restoration methods of a kind of combining form method as described in claim 1 or 3, its
It is characterised by：The object function uses XOR.
5. the intelligent distribution network fault location and restoration methods of a kind of combining form method as described in claim 1 or 3, its
It is characterised by：The heuritic approach uses random search.
6. the intelligent distribution network fault location and restoration methods of a kind of combining form method as claimed in claim 1, it is special
Sign is：The step 2）Generation contact ring matrix includes the generation in effective initial solution storehouse and new explanation, reconstruct coding rule.
7. the intelligent distribution network fault location and restoration methods of a kind of combining form method as claimed in claim 6, it is special
Sign is：It is described reconstruct power distribution network coding rule be that power distribution network is simplified according to the in-degree that goes out of node, using the decimal system with
The coded system of binary system mixing carries out power distribution network reconfiguration coding.
8. the intelligent distribution network fault location and restoration methods of a kind of combining form method as claimed in claim 1, it is special
Sign is：The step 5）Failure phase formula recover to include step in detail below：
S1：Data prepare；The block switch information that power distribution network isolated fault is cut-off, real time fail is matched with contingency set,
Seek to plan isolated island scheme；
S2：Recover non-faulting network connectivty using heuristic rule, to rest network, recover to lose by the closure of interconnection switch
Electric region and the maximum connectivity of charging zone；
S3：It is reconstructed as target using power distribution network node voltage offset and line load rate, is opened for the not operating contacts of S2
Close and block switch carries out Topological expansion, recover power distribution network safety in operation, and with formalization method checking network weight
Structure optimization process is rationally reliable；
S4：Cutting load, if S3 reconfiguration scheme can not be completely eliminated, node voltage amplitude is out-of-limit and circuit overload problem, adopts
Cutting load is carried out with Depth Priority Searching combination load priority, reaches safe operation state to system.
9. the intelligent distribution network fault location and restoration methods of a kind of combining form method as described in claim 1 or 8, its
It is characterised by：The stage recovery process of distribution network failure is included into four-stage, with the change of the folding condition of each stage switch
As state variable, judged using the amplitude of node voltage and line load rate as step function, each stage by index
Whether perform.
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