CN107015123A - A kind of accurate decision method of transmission line malfunction based on recorder data - Google Patents
A kind of accurate decision method of transmission line malfunction based on recorder data Download PDFInfo
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- CN107015123A CN107015123A CN201710419543.0A CN201710419543A CN107015123A CN 107015123 A CN107015123 A CN 107015123A CN 201710419543 A CN201710419543 A CN 201710419543A CN 107015123 A CN107015123 A CN 107015123A
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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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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
- G01R31/088—Aspects of digital computing
Abstract
The invention discloses a kind of accurate decision method of the transmission line malfunction based on recorder data, comprise the following steps：S1, bus Auto-matching；S2, zero sequence analog signalses reversal connection Intelligent Recognition and correction；S3, using full analog signalses judge circuit breaker trip；S4, border anticipatory method screening fault reference point；S5, the anti-misoperation locking recognized based on busbar voltage perturbation features.The present invention adapts to the random change of power system operating mode, the passage reversal connection phenomenon easily occurred during compatible scene electrical construction, avoid the not enough problem of judgment basis in the case of kernel state amount signal configuration parameter missing/incomplete, overcome and rely on the unreliability that single failure datum mark is easily sent out in the past, various emulation signal interference are threatened when releasing transformer station's experiment, the degree of accuracy of faulty line judgement greatly improved, has closely agreed with power system management and operation characteristic.
Description
Technical field
Accurately judge the present invention relates to technical field of electric power, more particularly to a kind of transmission line malfunction based on recorder data
Method.
Background technology
The black box recorded as substation operation, every oscillograph can be simultaneously to a plurality of transmission line of electricity (also known as circuit)
Monitored, by taking a 220kV transformer station as an example, the power transmission line way of every oscillograph monitoring of regulation is 6 to 8, and is used
In the digitlization oscillograph then up to 30 of intelligent substation.About 95% electric network fault is betided on transmission line of electricity, is formed short
Road effect, due to the sensitivity that oscillograph is recorded, either power network normal disturbances or transmission line malfunction, related data all can
Recorded and analyzed by oscillograph.During transmission line malfunction, the electrical quantity of some adjacent circuits can also show similar features,
Therefore, to the judgement of faulty line, first have to make a distinction with various grid disturbances, the doubtful feature of its secondary same adjacent lines
Screened, additionally need to take into full account other can unexpected factor, prevent from judging, failing to judge phenomenon by accident.
In informationization technology highly developed today, transformer station has been realized in unattended, and power regulation department relies on
Spread all over oscillograph everywhere, full automatic Stateful Inspection and fault verification are implemented to intensive power transmission line corridor, once occur
The erroneous judgement of transmission line malfunction is failed to judge, and will cause consequence difficult to the appraisal to the accident treatment for dispatching administrative staff.Therefore, base
The accurate judgement under various scenes is carried out to faulty line in recorder data, is conducive to rapid development emergency preplan and line inspection defect elimination
Measure, ensures transmission reliability, reduces loss of outage.Faulty line is judged based on recorder data, the technology faced is asked
Topic has：
Bus mispairing.The adjustment of power system operating mode is random, and the bus that circuit is mounted also can be adjusted accordingly, but is adjusted
Parameter after whole does not notify oscillograph, causes in recorder data is recorded, and the bus parameter of circuit mounting is same not to be inconsistent actually, from
And cause erroneous judgement.
Zero sequence reversal connection.Oscillograph is when accessing the analog signalses of substation bus bar and circuit, the zero sequence of voltage and current
Signal secondary circuit is just the opposite in passage connection, therefore easily human error is anti-by zero sequence during electrical construction
Connect, cause signal acquisition source just to be malfunctioned, judgement of the influence later stage to faulty line.
Important state parameter definition is lacked.In oscillograph monitoring signal, except necessary busbar voltage, line current etc.
Analog signalses, in addition to the state quantity signal such as protection act, the circuit breaker trip being equipped with for circuit, wherein circuit breaker trip are believed
Number it is to judge line failure most direct strong foundation.But in actual disposition, because different manufacturers oscillograph is set in function
Difference on meter, with circuit closely related important state signal parameter usually define it is not rigorous, or even missing, be fault wire
The intuitive judgment on road causes trouble.
It is high that fault reference point chooses risk.Judge that circuit troubles inside the sample space first has to be based on rational ranging datum mark, it is theoretical
On, any one point is all good selection in time window A, but this is only for metallic short circuit class ideal type failure.
As thunderbolt ripple, this kind of developing fault of mountain fire, each electrical component numerical discretization degree of adjacent moment is very big, chooses different datum marks
Distance measurement result difference substantially, under extreme case, the datum mark for having half in time window A can make outside ranging localization result Luo areas
Or opposite direction, as " minefield ".Therefore, the selection of fault reference point often has certain chance component, and error probability is high, pole
Easily trigger and fail to judge.
Emulation data of the power system personnel when transformer station is engaged in experiment, regular inspection activity are with physical fault data height phase
Seemingly, difficulty is screened big.With advancing by leaps and bounds for experimental assembly manufacturing capacity and theory of algorithm level, substation field has had energy
Power simulates the various signals extremely approached with true electric network fault scene on secondary circuit, is not only embodied in analog signalses
In terms of fidelity, the action logic of state quantity signal, timing variations also several indifferences, even if manual identified is all highly difficult, one
Denier triggers erroneous judgement, and consequence is extremely serious.
The faulty line characteristic quantity signal of standard is as shown in Figure 3.T0 moment circuits are in normal duty state, and Tn is failure
Starting point, the Tb moment that is protected in that the circuit is equipped with outputs actuating signal, and breaker receives actuating signal and tripped after the Tc moment,
Failure phase load on to Tm point circuits is removed, and current signal is 0.
The content of the invention
The present invention proposes a kind of accurate decision method of the transmission line malfunction based on recorder data, to solve above-mentioned background
The problem of being proposed in technology.
The present invention proposes a kind of accurate decision method of the transmission line malfunction based on recorder data, comprises the following steps：
S1, bus Auto-matching：When transmission line of electricity breaks down, the current value of failure phase short dot increased dramatically, voltage
Value reduces in various degree, and short dot is nearer apart from oscillograph, and the amplitude that magnitude of voltage reduces is bigger, by calculating magnitude of voltage during failure
The dough softening, can Auto-matching be out of order the true bus that circuit mounted, step is as follows：
The bus that A1, basis are initially mounted, determines the voltage class of the circuit, and then filters out all of same voltage class
Bus, includes the alternative echelon of bus；
A2, voltage attenuation degree calculating is carried out to initial mounting bus, on the basis of T0, bus A, B, C three-phase is calculated respectively
Primitive period component virtual value Ua, Ub, Uc of voltage, i.e., load voltage when bus is normal；
If any one is less than 35V (two sub-values) in A3, Ua, Ub, Uc, the bus is abandoned, next alternative bus is carried out
Matching；
A4, otherwise, on the basis of Tn, in time window A, is that interval continuously takes and calculated with 1 millisecond, mother is counted respectively
Minimum primitive period component virtual value Ua1, Ub1, Uc1 of line A, B, C three-phase voltage；
A5, Ua2=(Ua1-Ua)/Ua, Ub2=(Ub1-Ub)/Ub, Uc2=(Uc1-Uc)/Uc is set, if | Ua2 |, | Ub2
|, | Uc2 | middle any one is not less than 10%, then matches bus success, and flow terminates；
A6, otherwise, repeat step A2, A3, A4, A5 judge alternative echelon's median generatrix, until successful match successively
Go out bus；
If successful match is still unable to after the completion of A7, above-mentioned steps goes out bus, matching initial mounting bus；
S2, zero sequence analog signalses reversal connection Intelligent Recognition and correction：At any time, busbar voltage zero sequence analog signalses
Instantaneous value Un1=- | Ua1+Ub1+Uc1 |, line current zero sequence analog signalses instantaneous value In1=| Ia1+Ib1+Ic1 |, its
In, Ua1, Ub1, Uc1 are respectively the instantaneous value of bus A, B, C three-phase voltage analog signalses, and Ia1, Ib1, Ic1 are respectively circuit
The instantaneous value of A, B, C three-phase current analog signalses；
In view of zero sequence analog signalses are the unique foundations for judging ground property failure, once there is zero sequence reversal connection, if not
Identification and corrective measure are taken, faulty line is will result directly in and fails to judge；
When carrying out target line correlation computations, on the basis of Tn, current zero sequence analog signalses are counted in time window A
Maximum instantaneous value In_max, and point at the time of corresponding to In_max, and calculate moment point A, B, C three-phase current analog quantity letter
Number instantaneous value sum Iabc, if In_max is consistent with Iabc sign symbols, can determine that current zero sequence analog signalses passage is not anti-
Connect, be otherwise considered as reversal connection, if there is reversal connection, correction mode is all to negate current zero sequence analog signalses instantaneous value symbol；
When carrying out the bus correlation computations of target line mounting, on the basis of Tn, voltage zero sequence is counted in time window A
The maximum instantaneous value Un_max of analog signalses, and point at the time of corresponding to Un_max, and calculate moment point A, B, C three-phase electricity
Pressing mold analog quantity sample sum Uabc, if Un_max and Uabc sign symbols are on the contrary, can determine that voltage zero sequence analog quantity is believed
Number non-reversal connection of passage, is otherwise considered as reversal connection, if there is reversal connection, correction mode is by voltage zero sequence analog signalses instantaneous value symbol
All negate；
By the reversal connection automatic identification of zero sequence analog signalses and correction, the real electric simulation amount letter of reduction fault moment
Number feature, is that being appropriately determined for target line is cleared away the obstacles；
S3, using full analog signalses judge circuit breaker trip：The quantity of state displacement signal that circuit breaker trip is sent is very
Key, is to judge the necessary condition that target line breaks down, and in engineering actual disposition, in many cases in recorder data simultaneously
Without reflection circuit-breaker status amount configuration information strictly according to the facts, complete, cause circuit breaker trip signal not confirm, hamper failure
Circuit judges；
During line failure, current in the short increases rapidly, causes the protection device for circuit outfit at the Tb moment
Act and send signal, breaker is received after signal and tripped at the Tc moment, disjunction short dot, after tripping successfully, the event on circuit
Hinder phase load to be removed in Tm, electric current is 0 and kept；
According to characteristic principle of the failure phase load before and after circuit breaker trip, full analog signalses can be based on, target is recognized
The faulted phase current of circuit can retrodict judgement breaker from the analog signalses variation characteristic that is changed into 0 and keeps process is increased to
Tripping operation, so as to break away from the dependence to state quantity signal, is not malfunctioned, incomplete factor is influenceed, and has flexibility concurrently by its configuration parameter
And reliability；
Circuit breaker trip judgement is carried out based on full analog signalses, method is that the event of target line is judged in time window B
Whether barrier phase current analog signal instantaneous value is continuously 0, judges that establishment then represents circuit breaker trip；
Instantaneous value is 0 also not proper numerical value " 0 ", generally by the faradic effect of zero sequence, actually
One less limiting value of numerical value, limiting value is also influenceed by fault type, the method for operation, shows certain fluctuation, existing
It is assumed that the approximation is Z0, then Z0 obtaining value method is：
B1, calculate respectively in T0 moment target line A, B, C three-phase current analog signalses primitive period component virtual values
(two sub-values), is designated as Ia, Ib, Ic, takes their maximum, is designated as Imax, i.e. target line maximum phase load under normal circumstances
Electric current；
If B2, Imax are not more than 0.005, Z0=0.002, value flow terminates；
B3, otherwise, Z0=Imax/25, if Z0 is not more than 0.01, Z0=0.01；
If B4, Z0 are not less than Imax/3, Z0=Imax/3；
If B5, Z0 are not less than 0.1, Z0=0.1；
Determine after Z0, on the basis of failure removal point Tm, to faulted phase current analog signalses instantaneous value in time window B
The discriminant approach for remaining 0 is：
C1, initialization counter are 0, for representing that instantaneous value is continuously less than Z0 number of times；
C2, on the basis of failure removal point Tm, in time window B, with 1 millisecond for interval, the electricity of node-by-node algorithm failure phase
Flow field simulation amount signal primitive period component virtual value (two sub-values), if less than Z0, counter adds 1, otherwise counter clear 0；
If C3, counter are more than 12, judge to set up, that is, confirm circuit breaker trip, flow terminates；
C4, otherwise, in time window B, counter is not more than 12 all the time, then can confirm that breaker does not trip, to the event
The determination flow of barrier phase terminates；
If C5, target line have multiple failure phases, by mutually repeating the above steps, wherein any one phase confirms that road device is jumped
Lock is all considered as effectively, otherwise, can determine that breaker does not trip；
S4, border anticipatory method screening fault reference point：Judge that circuit troubles inside the sample space must first establish a fault reference point,
The opportunity scope that datum mark is chosen can be from Tn until Tm, preferably chooses opportunity in time window A；
In actual calculating process, the selection of different datum marks, ranging localization result is also differed, even adjacent moment
The ranging localization result of two datum marks also has notable difference, the discreteness shown, in other words, if fault reference point
Choose unreasonable, its ranging localization result gently then causes to produce deviation with actual, it is heavy then exceed total track length, or fall in negative side
To accident is failed to report in initiation；
The improper great risk that can result in is chosen to eliminate fault reference point, screening failure base is expected using border herein
Method on schedule：Calculated at the beginning of carrying out ranging localization to all sampled points in time window A first, just calculate result and fall in circuit starting point to the end two
Within bar border, the alternative echelon of datum mark is included, then actuarial is carried out to these alternative points, optimal fault reference point is filtered out；
The advantage of border anticipatory method screening fault reference point method is to ensure all times in the first calculation stage first clearly
Select datum mark that ranging localization result can be made to occur in area, it is to avoid to depend on the ranging localization that single datum mark can trigger unduly
Outside to area or opposite direction risk of failing to judge, secondly, based on multiple datum marks calculate result undoubtedly more approaching to reality failure occur
Position, be conducive to lifted track walker search trouble point efficiency；
The measure of border anticipatory method screening fault reference point method is：
D1, the first length parameter (kilometer) according to target line, forward direction amplification extension 10%, reversely amplify extension 2%, this
Two boundary values establish the effective coverage of ranging localization result；
D2, initialization counter are 0, for representing the datum mark number in alternative echelon；
D3, on the basis of fault moment point Tn, with 1 millisecond for interval in time window A, continuously take and to carry out a ranging localization
Measuring and calculating, if results of measuring falls in effective coverage, counter adds 1；
D4, such as counter reach 10, no longer carry out remaining measuring and calculating, are directly entered step D6；
D5, otherwise, after time window A, counter is less than 3, and qualified datum mark number deficiency, target line is excluded, stream
Journey terminates；
If D6, counter are not less than 3, using " leaving out the beginning and the end " method, remove maximum and minimum value in alternative echelon, it is remaining
Lower value is averaged, that is, most preferable measuring and calculating distance；
D7, in each datum mark of alternative echelon, take the final fault reference point of a conduct closest to preferable measuring and calculating distance,
Confirm that troubles inside the sample space occurs for target line simultaneously；
S5, the anti-misoperation locking recognized based on busbar voltage perturbation features：Transformer station's operation maintenance personnel is to protection device, oscillograph
Carry out field experiment it is very common, having under putting equipment in service, regular inspection, upgrade and repair situation to occur, experiment produce
Emulate data extremely similar with true electric network fault data, during field test, to prevent wrong report, protection device can be by throwing
Test soft pressing plate and carry out locking emulation data, and therefore oscillograph, comes then without this kind of soft pressing plate mechanism for recorder data processing
Say, the automatic defect preventing locking measure of field simulation failure is extremely important；
Principle：Whole group is focused in substation field experiment, otherwise that is, test objective is a circuit, otherwise it is a mother
Line, will not apply fault-signal to a circuit and a bus simultaneously, actually or it otherwise can not judge that circuit bus is done
Anticipation reaction is gone out, has not reached test objective, therefore, in the failure period, only only line current analog signalses amplitude becomes
Change and correlation behavior amount signal intensity meets fault signature, but the busbar voltage analog signalses amplitude of mounting does not change
(zero disturbance or not), principle is recognizable accordingly and locking emulates data；
The anti-misoperation locking algorithm recognized by the perturbation features to busbar voltage is as follows：
E1, by foregoing bus automatic matching method, filter out the bus that target line is mounted；
E2, on the basis of T0, respectively calculate busbar channel A, B, C three-phase voltage primitive period component virtual value Ua, Ub,
Uc, i.e., load voltage when bus is normal；
If in E3, Ua, Ub, Uc any one be less than 35V (two sub-values), directly confirm be emulation data, anti-misoperation locking into
Vertical, flow terminates；
E4, otherwise, on the basis of Tn, in time window A with 1 millisecond for interval, counts A, B, C three-phase voltage passage respectively
Minimum primitive period component virtual value Ua1, Ub1, Uc1, and maximum residual voltage primitive period component virtual value Un1；
E5, Ua2=(Ua1-Ua)/Ua, Ub2=(Ub1-Ub)/Ub, Uc2=(Uc1-Uc)/Uc is set, if | Ua2 |, | Ub2
|, | Uc2 | middle any one can confirm it is non-emulated data more than 3%, and anti-misoperation locking is released, and flow terminates；
E6, otherwise, if Un1 is more than 1.8 (two sub-values), can also confirm it is non-emulated data, and anti-misoperation locking is released, flow knot
Beam；
If E7, E5, E6 can not release anti-misoperation locking, it can confirm as emulating data, anti-misoperation locking need to be carried out, must not be missed
Report.
The present invention adapts to the random change of power system operating mode, and the passage easily occurred during compatible scene electrical construction is anti-
Phenomenon is connect, the not enough problem of judgment basis in the case of kernel state amount signal configuration parameter missing/incomplete is avoided, overcomes and rely in the past
The unreliability that single failure datum mark is easily sent out, various emulation signal interference are threatened when releasing transformer station's experiment, greatly improved
Faulty line judge the degree of accuracy, closely agreed with power system management and operation characteristic, with extremely strong specific aim and be applicable
Property.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the accurate decision method of transmission line malfunction based on recorder data of the invention；
Fig. 2 is a kind of schematic diagram of the accurate decision method of transmission line malfunction based on recorder data of the invention；
Fig. 3 is transmission line malfunction characteristic feature amount signal schematic representation of the invention.
Embodiment
With reference to specific embodiment, the present invention will be further described.
Such as Fig. 1, the present invention proposes a kind of accurate decision method of the transmission line malfunction based on recorder data, including as follows
Step：
S1, bus Auto-matching：When transmission line of electricity breaks down, the current value of failure phase short dot increased dramatically, voltage
Value reduces in various degree, and short dot is nearer apart from oscillograph, and the amplitude that magnitude of voltage reduces is bigger, by calculating magnitude of voltage during failure
The dough softening, can Auto-matching be out of order the true bus that circuit mounted, step is as follows：
The bus that A1, basis are initially mounted, determines the voltage class of the circuit, and then filters out all of same voltage class
Bus, includes the alternative echelon of bus；
A2, voltage attenuation degree calculating is carried out to initial mounting bus, on the basis of T0, bus A, B, C three-phase is calculated respectively
Primitive period component virtual value Ua, Ub, Uc of voltage, i.e., load voltage when bus is normal；
If any one is less than 35V (two sub-values) in A3, Ua, Ub, Uc, the bus is abandoned, next alternative bus is carried out
Matching；
A4, otherwise, on the basis of Tn, in time window A, is that interval continuously takes and calculated with 1 millisecond, mother is counted respectively
Minimum primitive period component virtual value Ua1, Ub1, Uc1 of line A, B, C three-phase voltage；
A5, Ua2=(Ua1-Ua)/Ua, Ub2=(Ub1-Ub)/Ub, Uc2=(Uc1-Uc)/Uc is set, if | Ua2 |, | Ub2
|, | Uc2 | middle any one is not less than 10%, then matches bus success, and flow terminates；
A6, otherwise, repeat step A2, A3, A4, A5 judge alternative echelon's median generatrix, until successful match successively
Go out bus；
If successful match is still unable to after the completion of A7, above-mentioned steps goes out bus, matching initial mounting bus；
S2, zero sequence analog signalses reversal connection Intelligent Recognition and correction：At any time, busbar voltage zero sequence analog signalses
Instantaneous value Un1=- | Ua1+Ub1+Uc1 |, line current zero sequence analog signalses instantaneous value In1=| Ia1+Ib1+Ic1 |, its
In, Ua1, Ub1, Uc1 are respectively the instantaneous value of bus A, B, C three-phase voltage analog signalses, and Ia1, Ib1, Ic1 are respectively circuit
The instantaneous value of A, B, C three-phase current analog signalses；
In view of zero sequence analog signalses are the unique foundations for judging ground property failure, once there is zero sequence reversal connection, if not
Identification and corrective measure are taken, faulty line is will result directly in and fails to judge；
When carrying out target line correlation computations, on the basis of Tn, current zero sequence analog signalses are counted in time window A
Maximum instantaneous value In_max, and point at the time of corresponding to In_max, and calculate moment point A, B, C three-phase current analog quantity letter
Number instantaneous value sum Iabc, if In_max is consistent with Iabc sign symbols, can determine that current zero sequence analog signalses passage is not anti-
Connect, be otherwise considered as reversal connection, if there is reversal connection, correction mode is all to negate current zero sequence analog signalses instantaneous value symbol；
When carrying out the bus correlation computations of target line mounting, on the basis of Tn, voltage zero sequence is counted in time window A
The maximum instantaneous value Un_max of analog signalses, and point at the time of corresponding to Un_max, and calculate moment point A, B, C three-phase electricity
Pressing mold analog quantity sample sum Uabc, if Un_max and Uabc sign symbols are on the contrary, can determine that voltage zero sequence analog quantity is believed
Number non-reversal connection of passage, is otherwise considered as reversal connection, if there is reversal connection, correction mode is by voltage zero sequence analog signalses instantaneous value symbol
All negate；
By the reversal connection automatic identification of zero sequence analog signalses and correction, the real electric simulation amount letter of reduction fault moment
Number feature, is that being appropriately determined for target line is cleared away the obstacles；
S3, using full analog signalses judge circuit breaker trip：The quantity of state displacement signal that circuit breaker trip is sent is very
Key, is to judge the necessary condition that target line breaks down, and in engineering actual disposition, in many cases in recorder data simultaneously
Without reflection circuit-breaker status amount configuration information strictly according to the facts, complete, cause circuit breaker trip signal not confirm, hamper failure
Circuit judges；
During line failure, current in the short increases rapidly, causes the protection device for circuit outfit at the Tb moment
Act and send signal, breaker is received after signal and tripped at the Tc moment, disjunction short dot, after tripping successfully, the event on circuit
Hinder phase load to be removed in Tm, electric current is 0 and kept；
According to characteristic principle of the failure phase load before and after circuit breaker trip, full analog signalses can be based on, target is recognized
The faulted phase current of circuit can retrodict judgement breaker from the analog signalses variation characteristic that is changed into 0 and keeps process is increased to
Tripping operation, so as to break away from the dependence to state quantity signal, is not malfunctioned, incomplete factor is influenceed, and has flexibility concurrently by its configuration parameter
And reliability；
Circuit breaker trip judgement is carried out based on full analog signalses, method is that the event of target line is judged in time window B
Whether barrier phase current analog signal instantaneous value is continuously 0, judges that establishment then represents circuit breaker trip；
Instantaneous value is 0 also not proper numerical value " 0 ", generally by the faradic effect of zero sequence, actually
One less limiting value of numerical value, limiting value is also influenceed by fault type, the method for operation, shows certain fluctuation, existing
It is assumed that the approximation is Z0, then Z0 obtaining value method is：
B1, calculate respectively in T0 moment target line A, B, C three-phase current analog signalses primitive period component virtual values
(two sub-values), is designated as Ia, Ib, Ic, takes their maximum, is designated as Imax, i.e. target line maximum phase load under normal circumstances
Electric current；
If B2, Imax are not more than 0.005, Z0=0.002, value flow terminates；
B3, otherwise, Z0=Imax/25, if Z0 is not more than 0.01, Z0=0.01；
If B4, Z0 are not less than Imax/3, Z0=Imax/3；
If B5, Z0 are not less than 0.1, Z0=0.1；
Determine after Z0, on the basis of failure removal point Tm, to faulted phase current analog signalses instantaneous value in time window B
The discriminant approach for remaining 0 is：
C1, initialization counter are 0, for representing that instantaneous value is continuously less than Z0 number of times；
C2, on the basis of failure removal point Tm, in time window B, with 1 millisecond for interval, the electricity of node-by-node algorithm failure phase
Flow field simulation amount signal primitive period component virtual value (two sub-values), if less than Z0, counter adds 1, otherwise counter clear 0；
If C3, counter are more than 12, judge to set up, that is, confirm circuit breaker trip, flow terminates；
C4, otherwise, in time window B, counter is not more than 12 all the time, then can confirm that breaker does not trip, to the event
The determination flow of barrier phase terminates；
If C5, target line have multiple failure phases, by mutually repeating the above steps, wherein any one phase confirms that road device is jumped
Lock is all considered as effectively, otherwise, can determine that breaker does not trip；
S4, border anticipatory method screening fault reference point：Judge that circuit troubles inside the sample space must first establish a fault reference point,
The opportunity scope that datum mark is chosen can be from Tn until Tm, preferably chooses opportunity in time window A；
In actual calculating process, the selection of different datum marks, ranging localization result is also differed, even adjacent moment
The ranging localization result of two datum marks also has notable difference, the discreteness shown, in other words, if fault reference point
Choose unreasonable, its ranging localization result gently then causes to produce deviation with actual, it is heavy then exceed total track length, or fall in negative side
To accident is failed to report in initiation；
The improper great risk that can result in is chosen to eliminate fault reference point, screening failure base is expected using border herein
Method on schedule：Calculated at the beginning of carrying out ranging localization to all sampled points in time window A first, just calculate result and fall in circuit starting point to the end two
Within bar border, the alternative echelon of datum mark is included, then actuarial is carried out to these alternative points, optimal fault reference point is filtered out；
The advantage of border anticipatory method screening fault reference point method is to ensure all times in the first calculation stage first clearly
Select datum mark that ranging localization result can be made to occur in area, it is to avoid to depend on the ranging localization that single datum mark can trigger unduly
Outside to area or opposite direction risk of failing to judge, secondly, based on multiple datum marks calculate result undoubtedly more approaching to reality failure occur
Position, be conducive to lifted track walker search trouble point efficiency；
The measure of border anticipatory method screening fault reference point method is：
D1, the first length parameter (kilometer) according to target line, forward direction amplification extension 10%, reversely amplify extension 2%, this
Two boundary values establish the effective coverage of ranging localization result；
D2, initialization counter are 0, for representing the datum mark number in alternative echelon；
D3, on the basis of fault moment point Tn, with 1 millisecond for interval in time window A, continuously take and to carry out a ranging localization
Measuring and calculating, if results of measuring falls in effective coverage, counter adds 1；
D4, such as counter reach 10, no longer carry out remaining measuring and calculating, are directly entered step D6；
D5, otherwise, after time window A, counter is less than 3, and qualified datum mark number deficiency, target line is excluded, stream
Journey terminates；
If D6, counter are not less than 3, using " leaving out the beginning and the end " method, remove maximum and minimum value in alternative echelon, it is remaining
Lower value is averaged, that is, most preferable measuring and calculating distance；
D7, in each datum mark of alternative echelon, take the final fault reference point of a conduct closest to preferable measuring and calculating distance,
Confirm that troubles inside the sample space occurs for target line simultaneously；
The above method is now based on, the line fault data caused to certain mountain fire carry out ranging localization measuring and calculating, target line is complete
Long 82.64 kilometers, correspondence border effective coverage is [- 1.65-95.04] kilometer, and it is public that actual line walking prospecting trouble point is located at 44.67
In, on the basis of fault moment point Tn, continuous 20 positioning measuring and calculating is carried out for interval with 1 millisecond in time window A, is as a result seen below
Table；
The corresponding ranging localization of different datum marks is apart from computational chart
Remove maximum 69.27, remove minimum value 43.25, remainder 8 is being worth and is 359.84, and average value is 44.98,
Alternative datum mark closest to average value is located at Tn+4, therefore Tn+4 is optimal fault reference point；
S5, the anti-misoperation locking recognized based on busbar voltage perturbation features：Transformer station's operation maintenance personnel is to protection device, oscillograph
Carry out field experiment it is very common, having under putting equipment in service, regular inspection, upgrade and repair situation to occur, experiment produce
Emulate data extremely similar with true electric network fault data, during field test, to prevent wrong report, protection device can be by throwing
Test soft pressing plate and carry out locking emulation data, and therefore oscillograph, comes then without this kind of soft pressing plate mechanism for recorder data processing
Say, the automatic defect preventing locking measure of field simulation failure is extremely important；
Principle：Whole group is focused in substation field experiment, otherwise that is, test objective is a circuit, otherwise it is a mother
Line, will not apply fault-signal to a circuit and a bus simultaneously, actually or it otherwise can not judge that circuit bus is done
Anticipation reaction is gone out, has not reached test objective, therefore, in the failure period, only only line current analog signalses amplitude becomes
Change and correlation behavior amount signal intensity meets fault signature, but the busbar voltage analog signalses amplitude of mounting does not change
(zero disturbance or not), principle is recognizable accordingly and locking emulates data；
The anti-misoperation locking algorithm recognized by the perturbation features to busbar voltage is as follows：
E1, by foregoing bus automatic matching method, filter out the bus that target line is mounted；
E2, on the basis of T0, respectively calculate busbar channel A, B, C three-phase voltage primitive period component virtual value Ua, Ub,
Uc, i.e., load voltage when bus is normal；
If in E3, Ua, Ub, Uc any one be less than 35V (two sub-values), directly confirm be emulation data, anti-misoperation locking into
Vertical, flow terminates；
E4, otherwise, on the basis of Tn, in time window A with 1 millisecond for interval, counts A, B, C three-phase voltage passage respectively
Minimum primitive period component virtual value Ua1, Ub1, Uc1, and maximum residual voltage primitive period component virtual value Un1；
E5, Ua2=(Ua1-Ua)/Ua, Ub2=(Ub1-Ub)/Ub, Uc2=(Uc1-Uc)/Uc is set, if | Ua2 |, | Ub2
|, | Uc2 | middle any one can confirm it is non-emulated data more than 3%, and anti-misoperation locking is released, and flow terminates；
E6, otherwise, if Un1 is more than 1.8 (two sub-values), can also confirm it is non-emulated data, and anti-misoperation locking is released, flow knot
Beam；
If E7, E5, E6 can not release anti-misoperation locking, it can confirm as emulating data, anti-misoperation locking need to be carried out, must not be missed
Report.
The principle of fault verification is carried out in such as Fig. 2, engineering application to target line, two conditions need to be met：
1) line fault occurs in area, i.e. the range points of fault localization positioning should be in target line length range, no
Total length must be exceeded or fallen opposite direction (distance values are negative)；
2) circuit breaker trip, circuit is once broken down, and actuating signal is outputed in the protection that target line is equipped with, and starts open circuit
Device trips, the failure phase load electric current on excision circuit；
The judgement of troubles inside the sample space is based on circuit analog signalses feature in recorder data, and the judgement of circuit breaker trip is based on record
The breaker trip condition amount signal displacement that wave number is equipped with for target line.
The relational language lexical or textual analysis occurred in text：
T0：First sampled point moment,
Tn：The trouble point moment,
Tn+1：1 millisecond after the moment of trouble point,
Tn+5：5 milliseconds after the moment of trouble point,
Tn+10：10 milliseconds after the moment of trouble point,
Tn+15：15 milliseconds after the moment of trouble point,
Tn+19：19 milliseconds after the moment of trouble point,
Tb：The protection act moment,
Tc：The circuit breaker trip moment,
Tm：The failure removal point moment,
Time window A：Trouble point and rear 1 cycle, totally 20 milliseconds, fault reference point optimal choice region,
Time window B：Failure removal point 3 cycle backward, totally 60 milliseconds, this region load must be reduced to 0.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (1)
1. the accurate decision method of a kind of transmission line malfunction based on recorder data, it is characterised in that comprise the following steps：
S1, bus Auto-matching：When transmission line of electricity breaks down, the current value of failure phase short dot increased dramatically, and magnitude of voltage is not
Reduce with degree, short dot is nearer apart from oscillograph, the amplitude that magnitude of voltage reduces is bigger, decayed by calculating magnitude of voltage during failure
Degree, can Auto-matching be out of order the true bus that circuit mounted, step is as follows：
The bus that A1, basis are initially mounted, determines the voltage class of the circuit, and then filter out all mothers of same voltage class
Line, includes the alternative echelon of bus；
A2, voltage attenuation degree calculating is carried out to initial mounting bus, on the basis of T0, bus A, B, C three-phase voltage is calculated respectively
Primitive period component virtual value Ua, Ub, Uc, i.e., load voltage when bus is normal；
If any one is less than 35V (two sub-values) in A3, Ua, Ub, Uc, the bus is abandoned, next alternative bus matching is carried out；
A4, otherwise, is that interval continuously takes and calculated with 1 millisecond in time window A on the basis of Tn, count respectively bus A,
Minimum primitive period component virtual value Ua1, Ub1, Uc1 of B, C three-phase voltage；
A5, Ua2=(Ua1-Ua)/Ua, Ub2=(Ub1-Ub)/Ub, Uc2=(Uc1-Uc)/Uc is set, if | Ua2 |, | Ub2 |, |
Uc2 | middle any one is not less than 10%, then matches bus success, and flow terminates；
A6, otherwise, repeat step A2, A3, A4, A5 judge alternative echelon's median generatrix successively, until successful match goes out mother
Line；
If successful match is still unable to after the completion of A7, above-mentioned steps goes out bus, matching initial mounting bus；
S2, zero sequence analog signalses reversal connection Intelligent Recognition and correction：At any time, busbar voltage zero sequence analog signalses are instantaneous
Value Un1=- | Ua1+Ub1+Uc1 |, line current zero sequence analog signalses instantaneous value In1=| Ia1+Ib1+Ic1 |, wherein,
Ua1, Ub1, Uc1 are respectively the instantaneous value of bus A, B, C three-phase voltage analog signalses, Ia1, Ib1, Ic1 be respectively circuit A,
The instantaneous value of B, C three-phase current analog signalses；
In view of zero sequence analog signalses are the unique foundations for judging ground property failure, once there is zero sequence reversal connection, if do not taken
Identification and corrective measure, will result directly in faulty line and fail to judge；
When carrying out target line correlation computations, on the basis of Tn, current zero sequence analog signalses are counted most in time window A
Big instantaneous value In_max, and point at the time of corresponding to In_max, and calculate moment point A, B, C three-phase current analog signalses wink
Duration sum Iabc, if In_max is consistent with Iabc sign symbols, can determine that the non-reversal connection of current zero sequence analog signalses passage, no
Then it is considered as reversal connection, if there is reversal connection, correction mode is all to negate current zero sequence analog signalses instantaneous value symbol；
When carrying out the bus correlation computations of target line mounting, on the basis of Tn, the simulation of voltage zero sequence is counted in time window A
The maximum instantaneous value Un_max of signal, and point at the time of corresponding to Un_max are measured, and calculates moment point A, B, C three-phase electricity pressing mold
Analog quantity sample sum Uabc, if Un_max and Uabc sign symbols are on the contrary, can determine that voltage zero sequence analog signalses lead to
The non-reversal connection in road, is otherwise considered as reversal connection, if there is reversal connection, and correction mode is that voltage zero sequence analog signalses instantaneous value symbol is whole
Negate；
By the reversal connection automatic identification of zero sequence analog signalses and correction, the real electric simulation amount signal of reduction fault moment is special
Levy, be that being appropriately determined for target line is cleared away the obstacles；
S3, using full analog signalses judge circuit breaker trip：The quantity of state displacement signal that circuit breaker trip is sent is very crucial,
It is to judge the necessary condition that target line breaks down, and in engineering actual disposition, in many cases in recorder data not
Strictly according to the facts, complete reflection circuit-breaker status amount configuration information, causes circuit breaker trip signal not confirm, hampers faulty line
Judge；
During line failure, current in the short increases rapidly, causes the protection device being equipped with for the circuit to be acted at the Tb moment
And sending signal, breaker is received after signal and tripped at the Tc moment, disjunction short dot, after tripping successfully, the failure phase on circuit
Load is removed in Tm, and electric current is 0 and kept；
According to characteristic principle of the failure phase load before and after circuit breaker trip, full analog signalses can be based on, target line is recognized
Faulted phase current from the analog signalses variation characteristic that is changed into 0 and keeps process is increased to, judgement circuit breaker trip can be retrodicted,
So as to break away from the dependence to state quantity signal, do not malfunctioned by its configuration parameter, incomplete factor is influenceed, have flexibility concurrently and reliable
Property；
Circuit breaker trip judgement is carried out based on full analog signalses, method is the failure phase that target line is judged in time window B
Whether current analog signal instantaneous value is continuously 0, judges that establishment then represents circuit breaker trip；
Instantaneous value is 0 also not proper numerical value " 0 ", generally by the faradic effect of zero sequence, actually one
The less limiting value of numerical value, limiting value is also influenceed by fault type, the method for operation, shows certain fluctuation, it is now assumed that
The approximation is Z0, then Z0 obtaining value method is：
B1, calculate (secondary in T0 moment target line A, B, C three-phase current analog signalses primitive period component virtual values respectively
Value), Ia, Ib, Ic are designated as, their maximum is taken, Imax, i.e. target line maximum phase load electric current under normal circumstances is designated as；
If B2, Imax are not more than 0.005, Z0=0.002, value flow terminates；
B3, otherwise, Z0=Imax/25, if Z0 is not more than 0.01, Z0=0.01；
If B4, Z0 are not less than Imax/3, Z0=Imax/3；
If B5, Z0 are not less than 0.1, Z0=0.1；
Determine after Z0, on the basis of failure removal point Tm, faulted phase current analog signalses instantaneous value is kept in time window B
It is for 0 discriminant approach：
C1, initialization counter are 0, for representing that instantaneous value is continuously less than Z0 number of times；
C2, on the basis of failure removal point Tm, in time window B, with 1 millisecond for interval, the current-mode of node-by-node algorithm failure phase
Analog quantity signal primitive period component virtual value (two sub-values), if less than Z0, counter adds 1, otherwise counter clear 0；
If C3, counter are more than 12, judge to set up, that is, confirm circuit breaker trip, flow terminates；
C4, otherwise, in time window B, counter is not more than 12 all the time, then can confirm that breaker does not trip, to the failure phase
Determination flow terminate；
If C5, target line have multiple failure phases, by mutually repeating the above steps, wherein any one phase confirms the tripping operation of road device all
It is considered as effectively, otherwise, can determine that breaker does not trip；
S4, border anticipatory method screening fault reference point：Judge that circuit troubles inside the sample space must first establish a fault reference point, benchmark
The opportunity scope that point is chosen can be from Tn until Tm, preferably chooses opportunity in time window A；
In actual calculating process, the selection of different datum marks, ranging localization result is also differed, even two of adjacent moment
The ranging localization result of datum mark also has notable difference, the discreteness shown, in other words, if the selection of fault reference point
Unreasonable, its ranging localization result gently then causes to produce deviation with actual, heavy then exceed total track length, or falls in opposite direction,
Accident is failed to report in initiation；
The improper great risk that can result in is chosen to eliminate fault reference point, screening fault reference point is expected using border herein
Method：Calculated at the beginning of carrying out ranging localization to all sampled points in time window A first, just calculate result and fall on two sides of circuit starting point to the end
Within boundary, the alternative echelon of datum mark is included, then actuarial is carried out to these alternative points, optimal fault reference point is filtered out；
The advantage of border anticipatory method screening fault reference point method is to ensure all candidate's bases in the first calculation stage first clearly
Ranging localization result can on schedule occurred in area, it is to avoid depend on ranging localization that single datum mark can trigger unduly to area
The risk of failing to judge of outer or opposite direction, secondly, the result position that undoubtedly more approaching to reality failure occurs calculated based on multiple datum marks
Put, be conducive to lifting the efficiency that track walker searches trouble point；
The measure of border anticipatory method screening fault reference point method is：
D1, the first length parameter (kilometer) according to target line, forward direction amplification extension 10%, reversely amplify extension 2%, the two
Boundary value establishes the effective coverage of ranging localization result；
D2, initialization counter are 0, for representing the datum mark number in alternative echelon；
D3, on the basis of fault moment point Tn, with 1 millisecond for interval in time window A, continuously take and to carry out a ranging localization survey
Calculate, if results of measuring falls in effective coverage, counter adds 1；
D4, such as counter reach 10, no longer carry out remaining measuring and calculating, are directly entered step D6；
D5, otherwise, after time window A, counter is less than 3, and qualified datum mark number deficiency, target line is excluded, flow knot
Beam；
If D6, counter are not less than 3, using " leaving out the beginning and the end " method, remove maximum and minimum value in alternative echelon, remainder value
It is averaged, that is, most preferable measuring and calculating distance；
D7, in each datum mark of alternative echelon, take the final fault reference point of a conduct closest to preferable measuring and calculating distance, simultaneously
Confirm that troubles inside the sample space occurs for target line；
S5, the anti-misoperation locking recognized based on busbar voltage perturbation features：Transformer station's operation maintenance personnel is entered to protection device, oscillograph
Row field experiment is very common, and having under putting equipment in service, regular inspection, upgrade and repair situation to occur, and tests the emulation produced
Data are extremely similar with true electric network fault data, during field test, and to prevent wrong report, protection device can be by testing in throwing
Soft pressing plate carrys out locking emulation data, and oscillograph does not have this kind of soft pressing plate mechanism then, therefore, for recorder data processing,
The automatic defect preventing locking measure of field simulation failure is extremely important；
Principle：Whole group is focused in substation field experiment, otherwise that is, test objective is a circuit, otherwise it is a bus, no
Fault-signal can be applied to a circuit and bus simultaneously, actually or otherwise can not to judge that circuit bus is made that pre-
Phase reacts, and does not reach test objective, therefore, and in the failure period, only only line current analog signalses amplitude changes and phase
Off status amount signal intensity meets fault signature, but the busbar voltage analog signalses amplitude of mounting does not change (zero disturbance
Or do not disturb), principle is recognizable accordingly and locking emulates data；
The anti-misoperation locking algorithm recognized by the perturbation features to busbar voltage is as follows：
E1, by foregoing bus automatic matching method, filter out the bus that target line is mounted；
E2, on the basis of T0, respectively calculate busbar channel A, B, C three-phase voltage primitive period component virtual value Ua, Ub, Uc, i.e.,
Load voltage when bus is normal；
If any one is less than 35V (two sub-values) in E3, Ua, Ub, Uc, directly confirm it is emulation data, anti-misoperation locking is set up, stream
Journey terminates；
E4, otherwise, on the basis of Tn, in time window A with 1 millisecond for interval, counts A, B, C three-phase voltage passage most respectively
Small primitive period component virtual value Ua1, Ub1, Uc1, and maximum residual voltage primitive period component virtual value Un1；
E5, Ua2=(Ua1-Ua)/Ua, Ub2=(Ub1-Ub)/Ub, Uc2=(Uc1-Uc)/Uc is set, if | Ua2 |, | Ub2 |, |
Uc2 | middle any one can confirm it is non-emulated data more than 3%, and anti-misoperation locking is released, and flow terminates；
E6, otherwise, if Un1 is more than 1.8 (two sub-values), can also confirm it is non-emulated data, and anti-misoperation locking is released, and flow terminates；
If E7, E5, E6 can not release anti-misoperation locking, it can confirm as emulating data, anti-misoperation locking need to be carried out, must not be reported by mistake.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679151A (en) * | 2020-05-27 | 2020-09-18 | 武汉华电顺承科技有限公司 | Synchronous alignment point vector calculation method for double-end ranging of wave recording data |
| CN111751663A (en) * | 2020-06-29 | 2020-10-09 | 深圳供电局有限公司 | Method and system for drawing fault overall process time sequence based on power grid fault recording graph |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1547307A (en) * | 2003-12-16 | 2004-11-17 | 北京丹华昊博电力科技有限公司 | Method and apparatus for single phase ground fault route selection of low-current grounding power network |
| CN103501047A (en) * | 2013-10-09 | 2014-01-08 | 云南电力调度控制中心 | Intelligent fault wave recording main station information management system |
| CN104122485A (en) * | 2014-07-23 | 2014-10-29 | 国网天津市电力公司 | Recording file based line fault analysis |
| CN104635109A (en) * | 2015-01-23 | 2015-05-20 | 云南电网有限责任公司电力科学研究院 | High-accuracy method for directly calculating and extracting amplitude value and time constant of transient aperiodic component of power grid from fault recording data |
-
2017
- 2017-06-06 CN CN201710419543.0A patent/CN107015123B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1547307A (en) * | 2003-12-16 | 2004-11-17 | 北京丹华昊博电力科技有限公司 | Method and apparatus for single phase ground fault route selection of low-current grounding power network |
| CN103501047A (en) * | 2013-10-09 | 2014-01-08 | 云南电力调度控制中心 | Intelligent fault wave recording main station information management system |
| CN104122485A (en) * | 2014-07-23 | 2014-10-29 | 国网天津市电力公司 | Recording file based line fault analysis |
| CN104635109A (en) * | 2015-01-23 | 2015-05-20 | 云南电网有限责任公司电力科学研究院 | High-accuracy method for directly calculating and extracting amplitude value and time constant of transient aperiodic component of power grid from fault recording data |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679151A (en) * | 2020-05-27 | 2020-09-18 | 武汉华电顺承科技有限公司 | Synchronous alignment point vector calculation method for double-end ranging of wave recording data |
| CN111812455A (en) * | 2020-06-28 | 2020-10-23 | 云南电网有限责任公司 | Power transmission line double-end fault distance measurement method and system |
| CN111812455B (en) * | 2020-06-28 | 2022-11-08 | 云南电网有限责任公司 | Power transmission line double-end fault distance measurement method and system |
| CN111751663A (en) * | 2020-06-29 | 2020-10-09 | 深圳供电局有限公司 | Method and system for drawing fault overall process time sequence based on power grid fault recording graph |
| CN112595926A (en) * | 2020-12-10 | 2021-04-02 | 国网河南省电力公司漯河供电公司 | Technical research of intelligent identification and auxiliary compilation of regional power grid maintenance plan |
| CN113241735A (en) * | 2021-05-28 | 2021-08-10 | 广东电网有限责任公司 | 10kV outgoing line backup protection method and system based on station domain information |
| CN114065875A (en) * | 2021-12-02 | 2022-02-18 | 中国石油大学胜利学院 | Power grid fault identification system based on big data |
| CN114065875B (en) * | 2021-12-02 | 2022-11-11 | 山东石油化工学院 | Power grid fault identification system based on big data |
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