CN106990321A - Distribution line failure identifying device based on voltage monitoring - Google Patents
Distribution line failure identifying device based on voltage monitoring Download PDFInfo
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- CN106990321A CN106990321A CN201710173112.0A CN201710173112A CN106990321A CN 106990321 A CN106990321 A CN 106990321A CN 201710173112 A CN201710173112 A CN 201710173112A CN 106990321 A CN106990321 A CN 106990321A
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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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/252—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- 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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Abstract
Distribution line failure identifying device based on voltage monitoring gathers the voltage of three-phase line simultaneously, in the phase of circuit one or multiphase failure, device automatically extracts the data in several cycles before and after failure, by analyzing three-phase respective voltage status synchronizing cycle, determine the actual correspondence different faults type of various combination of three-phase voltage state so that the present apparatus can recognize that distribution line is no less than following 7 kinds of failures simultaneously：Single-phase earthing, single-phase wire break, line to line fault, line to line fault ground connection, three-phase shortcircuit, three-phase shortcircuit ground connection and instantaneous interference failure.
Description
One technical field
The technology of the present invention belongs to Distributing Network Automation field in power system, particularly belongs to distribution line on-line monitoring
And various faults are judged, recognized and classified, so as to timely handling failure, recover power grid security in time and power.
Two background technologies
China's power system is taken based on the technology of line current monitoring to carry out distribution line failure extensively so far
Monitoring, wherein main synthesize zero-sequence current by three-phase current recording, then by a variety of signs of zero-sequence current come failure judgement,
Classification failure, suspected fault position；Three-phase current is symmetrical when the premise of this technology application is requirement circuit normal work；Here
Practical problem be that triple line load current on distributiong main it is different, per phase line in each section of line electric current be even more it is different, every section
The three-phase current of line is more difficult to balance different instantaneous so that the zero-sequence current that failure is instantaneously synthesized be do not meet it is actual,
Or it is that can less accurately reflect failure to say, because wherein containing original current imbalance factor, the identification to failure
It is limited with positioning accuracy.
And the different grades of voltage stabilization of power system all has standard criterion, there is rate of qualified voltage examination, be
The result of the numerous worker's proactive maintenances of power system；So producing the interference to voltage for failure on circuit and external disturbance
Be very sensitive, be conducive to distinguishing and find, if scientifically to voltage monitoring, wisdom to anomalous identification, it is possible to very
Well failure judgement, positioning failure.
Three content of the invention
The 1 distribution line failure identifying device based on voltage monitoring, it is characterized in that：The voltage of three-phase line is gathered simultaneously,
In the phase of circuit one or multiphase failure, device automatically extracts the data in several cycles before and after failure, by synchronizing cycle point
The respective voltage status of three-phase is analysed, the actual correspondence different faults type of various combination of three-phase voltage state is determined so that this
Device can recognize that distribution line is no less than following 7 kinds of failures simultaneously：Single-phase earthing, single-phase wire break, line to line fault, line to line fault connect
Ground, three-phase shortcircuit, three-phase shortcircuit ground connection and instantaneous interference failure.
It is the characteristics of special determination data during 2 identification distribution line different faults type：Any position single-phase earthing on line
When -- earth fault phase voltage decreases closer to 0, and ungrounded two-phase voltage rise is close to conventional 1.73 times；Any position on line
During single-phase wire break -- each point voltage jump is close to 0 after breakpoint, and breakpoint is constant toward bus terminal voltage, and non-broken string phase voltage is not
Become；When any position two-phase is short-circuit on line -- short-circuit line voltage jump halves, and non-shorting phase voltage is constant；Any position three on line
Mutually during short circuit -- three-phase voltage reduction convergence is 0；When the monitoring of distribution line failure identifying device analyzes these data characteristicses
It counter can push away the fault type for identifying distribution line.
3 features based on voltage monitoring are, from distribution transformer low-pressure side collection voltages, to make Fault Identification Shi Yao areas
Other distribution high-voltage line failure and low-voltage line failure, area's method for distinguishing have two：One is that malfunction monitoring point correspondence access distribution is high
At line ball, differentiated according to adjacent monitoring point data on line by fault impact degree, usually low-voltage line when data are basically unchanged
Failure, and the failure occurred on distribution high-voltage line must influence completely multiple monitoring points, need to build between so neighbouring monitoring point
Vertical certain correspondence；Two be the frequency spectrum for analyzing the malfunction monitoring point several periodic voltage data since occurring failure,
Judge that this failure is caused by low-pressure side circuit when frequency content is relatively high, judge this failure by height when frequency content is relatively low
Pressure side causes.
4 present apparatus when doing Fault Identification data processing features by " fault category character string " method, can make system towards
The data that three-phase line is largely gathered and handled, can recognize quick, efficient and standardization；This method is pressed when fault data is handled
Data characteristicses fill in character string, fault type are determined by identification string；Here the character string standardized is：
A phases, which are grounded character string EA----A0B3C3, B phase and are grounded character string EB---B0A3C3, C phase, is grounded character string
EC----C0A3B3；
A phases character string FA----A0B1C1, B phase character string FB----B0A1C1, the C phase that breaks that breaks breaks character string
FC-----C0A1B1；
The short-circuit character string of short-circuit character string GBC----B2C2A1, AC of AB phases short circuit character string GAB----A2B2C1, BC
GAC---A2C2B1；
AB phases short ground character string HAB----A0B0C1, BC short ground character string HBC----B0C0A1, AC short ground character string
HAC---A0C0B1；
ABC three phase short circuit fault character strings IABC----A4B4C4, three-phase shortcircuit earth fault character string JABC0----
A0B0C0。
The anti-convention of the system one does not use the method based on current monitoring, and voltage monitoring technology is taken based on alone to realize
Discovery and identification to distribution line different type failure.High-tension distributing line most common failure by the source of failure can be divided into
Lower three aspects：
1. failure can not automatically be recovered, need artificial place after 10KV circuits and relevant device are impacted or damaged by substance
In terms of reason；
2. by being struck by lightning, the external force such as transient earthing influenceed that voltage instantaneous is raised and lowered, primary voltage can be returned to afterwards
State aspect；
3., afterwards can the side of recovery by user's low-voltage circuit by the influence instantaneous voltage reduction such as electric shock, instant earthing, short
Face；
The system be directed to the 1st type, solve its failure can not recover and be monitored and realize Fault Identification, classification, calmly
Position, solves the problems, such as emphatically the Fault Identifications such as phase line grounding, broken string, two wires short circuit, the short circuit of three lines or comprehensive generation；For Equations of The Second Kind
Type recovers transient fault situation, continues continuous monitoring data to analyze difference by collinear many monitoring points after failure；For
Disturbed condition caused by the low-voltage circuit transient fault of 3rd type, the data of collinear multiple spot monitoring are come analysis area during by failure
Not；
When identification technology based on voltage monitoring recording is carried out on distribution line, to solve distribution periphery by with distribution
The influence for two aspects being joined directly together, specific two aspects and targetedly solution is：
1. transformer station's distribution bus often sends out a plurality of distribution towards different directions simultaneously, wherein event occurs for a distribution
Barrier can have influence on other distributions by bus, and this just has influence on fault location；At this moment fault-free distribution and faulty distribution are noted
The different characteristics of voltage's distribiuting, takes and combines the monitoring point voltage recorder data of all these distributions to recognize failure and analyze event
Hinder position.
2. on the low-voltage supply line that distribution line is driven it is also possible to be grounded, break, the failure such as short circuit,
So that directly affecting the representative meaning of institute's Monitoring Data, at this moment Monitoring Data may not be certain transformer primary side high pressure where explanation extremely
Wiring fault；The corresponding high pressure tie point of failure low-voltage line only one, usually low-voltage line failure only make this voltage by
Adjacent monitoring point and farther point should not be much affected on disturbance, the phase high-tension line；At this moment matched somebody with somebody by comparing same bar
The multiple data of monitoring point of line can identify this failure be what failure, be by where caused failure.
Four brief description of the drawings
The functional module composition figure of Fig. 1 ----apparatus of the present invention, wherein A, B, C connects the three-phase line of power frequency civil power,
Through A/D gathered datas in device, it is sent to primary processor and carries out Fault Identification processing；Gps clock is then provided to data processing complete
Synchronous in distribution network system, communication module then makes the present apparatus transmit connection to distribution network background process data.
Fig. 2 --- the different change various combinations of three-phase line voltage status during-signal distribution line different faults type；
Voltage status change during 6 kinds of failure situations is listed in figure：Singlephase earth fault, single-phase wire break failure, two-phase short-circuit fault, two
Phase short circuit grounding failure, three phase short circuit fault, three-phase shortcircuit earth fault.
Five embodiments
5.1 default assigned variable failure definition classification character strings
Define distribution high-voltage line voltage monitoring cycle effective state of value：By taking A phase numerical value as an example, B, C phase example are same.
A0----A phase voltage cycles virtual value ＜ U 20%, A1----A phase voltage cycles virtual value be normal value U (1 ±
5%), A2----A phase voltages cycle virtual value be U (1/2 ± 10%), A3----A phase voltage cycles virtual value be U (1.73 ±
10%), A4----A phase voltages cycle virtual value ＜ U30%.Based on these definition, the character of following different faults type is determined
String.
The later monitoring point three-phase state variable E of singlephase earth fault earth point：A0, B0, C0 (or A phases or B phases or
Person's C phases are grounded)；
A phases are grounded (A0 and B=U (1.73 ± 10%), C=U (1.73 ± 10%), definition character string EA----A0B3C3；
B phases are grounded (B0 and A=U (1.73 ± 10%), C=U (1.73 ± 10%), definition character string EB----B0A3C3；
C phases are grounded (C0 and B=U (1.73 ± 10%), A=U (1.73 ± 10%), definition character string EC----C0A3B3；
Singlephase earth fault earth point monitors situation toward head end：Faulted phase voltage become (＜ U 20%), non-faulting mutually electricity
Press U (1.73 ± 10%).
The separate state variable F of single-phase wire break failure breakpoint backward：A0、B0、C0；
A phases break (A0 --- B=U (1 ± 5%), C=U (1 ± 5%) normal), definition character string FA----A0B1C1；
B phases break (B0 --- A=U (1 ± 5%), C=U (1 ± 5%) normal), definition character string FB----B0A1C1；
C phases break (C0 --- B=U (1 ± 5%), A=U (1 ± 5%) normal), definition character string FC----C0A1B1；
Single-phase wire break failure breakpoint is to head end multiple spot monitoring situation：It is the normal U of faulted phase voltage (1 ± 5%) (A1B1C1), non-
Faulted phase voltage also normal U (1 ± 5%) (A1B1C1).
The separate state variable G of double phase fault short dot backward：AB、AC、BC；
AB short circuits (AB=U (1/2 ± 10%) --- C=U (1 ± 5%) is normal), definition character string GAB----A2B2C1；
BC short circuits (BC=U (1/2 ± 10%) --- A=U (1 ± 5%) is normal), definition character string GBC----B2C2A1；
AC short circuits (AC=U (1/2 ± 10%) --- B=U (1 ± 5%) is normal), definition character string GAC----A2C2B1；
Double phase fault short dot is to head end multiple spot monitoring situation：It is the low U of failure two-phase voltage drop (1/2 ± 10%), non-
The normal constant U (1 ± 5%) of faulted phase voltage.
The separate state variable H of double phase short circuit earth fault short circuit grounding point backward：AB0、AC0、BC0；
AB (AB=0 --- C=U (1 ± 5%) is normally), definition character string HAB----A0B0C1 shortly；
BC (BC=0 --- A=U (1 ± 5%) is normally), definition character string HBC----B0C0A1 shortly；
AC (AC=0 --- B=U (1 ± 5%) is normally), definition character string HAC----A0C0B1 shortly；
Double phase short circuit earth fault short circuit grounding point is to head end multiple spot monitoring situation：Failure two-phase voltage drop it is low become 0 (＜ U
20%), non-faulting phase voltage is normal U.
The separate state variable I of three phase short circuit fault：ABC；Definition character string IABC----A4B4C4；
The separate variable J of three-phase shortcircuit earth fault：ABC0；Definition character string JABC0----A0B0C0；
If the normal voltage effective value of cycle T is U (1 ± 5%).
5.2 according to three-phase voltage state during monitoring point inaction interval (3~8T) data authentication failure
Circuit, branch line, shaft tower numbering and monitoring point numbering, write down this event where the point provided according to data monitoring point
Circuit where barrier；
It may be determined as follows based on failure wave-recording curve data characteristic analysis malfunction monitoring data：
For singlephase earth fault, failure phase 3T virtual values are reduced than 2T virtual value, 4T virtual values are more reduced than 3T, directly
Tend to 0 during to 7T, 8T；And first non-faulting phase 3T virtual values than 2T rise, until 8T virtual values be not less than 7T, tend to 1.73
Times；And the second non-faulting phase 3T virtual values are raised than 2T, up to 8T virtual values are not less than 7T, tend to 1.73 times；Judge the line
Singlephase earth fault occurs for road.
For single-phase wire break failure, voltage 3T virtual values are than the reduction of 2T virtual value, 7T8T virtual values after failure phase breakpoint
More reduce, and the first non-faulting phase 3T virtual values it is more equal than 2T, until 8T virtual values be also equal to 7T virtual values；And the second non-event
Barrier phase 3T virtual values are equal to 2T, until 8T virtual values are also equal to the 7T virtual values；Judge that single-phase open phase fault occurs for the circuit.
For two-phase short trouble, Fisrt fault phase 3T virtual values are reduced than 2T virtual value, until 8T virtual values are not more than
7T, and the second failure phase 3T virtual values, than 2T reductions, until 8T virtual values are also not more than 7T, numerical value tends to the half of initial value；And
And non-faulting phase 3T virtual values are equal to 2T, until 8T virtual values are also equal to the 7T, equal to the half of initial value；Judge that the circuit occurs
Two-phase short trouble.
For two-phase short circuit grounding failure, Fisrt fault phase 3T virtual values are reduced than 2T values, until 8T virtual values are not more than
7T；And second failure phase 3T virtual values than 2T reduction, until 8T virtual values also be not more than 7T, tend to 0 (＜ U 20%)；And it is non-
Failure phase 3T virtual values are equal to 2T, until 8T virtual values are also equal to the 7T, equal to initial value；Judge that the circuit occurs two-phase short circuit and connect
Earth fault.
For three phase short circuit fault, Fisrt fault phase 3T virtual values are reduced than 2T virtual value, until 8T virtual values are not more than
7T, and the second failure phase 3T virtual values tend to 0 (＜ U 20%) than 2T reductions, up to 8T virtual values are also not more than 7T；And the
Three failure phase 3T virtual values are also below 2T, until 8T virtual values also no more than 7T, tends to 0 (＜ U 20%)；Judge the circuit
Generation three phase short circuit fault.
For three-phase shortcircuit earth fault, Fisrt fault phase 3T virtual values are reduced than 2T virtual value, until 8T virtual values are not
More than 7T, and the second failure phase 3T virtual values are reduced than 2T, 8T virtual values are also not more than 7T, tend to 0 (＜ U 20%)；And the
Three failure phase 3T virtual values are also not more than the 7T also below 2T, 8T virtual value, tend to 0 (＜ U 20%)；Judge that the circuit occurs
Three-phase shortcircuit earth fault.
5.3 recognize failure with multicycle virtual value before and after single monitoring point failure --- fill in failure character string
ABC phases extract T in order every time during identificationiThis T data is judged by monocycle effective Value Data；
Three-phase judges that cycle virtual value inserts " three-phase periodic state vector character string T for every 1 time1(AiBiCi) " in, sentence
Disconnected process is as follows：
(1) A phase virtual values are taken, rear T values find that data are basically unchanged, belonged to normally in ± 8% scope than preceding T values；
Character string T1(AiBiCi) in fill out T1(A1), programming jump is arrived --- 2.；If data are strongly reduced close to 0 (＜ 1kV), it is judged to
A phase earth faults, fill out T1(A0)；Programming jump is to 2.；If it find that data are close to 5KV ± 5%, A phases are participated in two are judged to
Line short trouble, fills out T1(A2), 2. program goes to；If data are drastically raised close to 17.3KV ± 5%, it is judged to B or C connects
Ground, fills out T1(A3)；Programming jump is to 2..
(2) B phase virtual values are taken, rear T values find that data are basically unchanged, in ± 5% scope than preceding T values；In above-mentioned T1(AI)
In be filled with B1, as T1(AIB1), programming jump is to 3.；If data are strongly reduced close to 0 (＜ 1kV), the short circuit of AB phases is judged to
Earth fault, in above-mentioned T1(AI) in be filled with B0, as T1(AIB0), programming jump is to 3.；If it find that data reduce close to
5KV ± 5%, is judged to AB or BC phase short troubles；In above-mentioned T1(AI) in be filled with B2, as T1(AIB2), programming jump is to 3.；
If it find that data are drastically raised close to 17.3KV ± 5%, A or C ground connection is judged to；In above-mentioned T1(AI) in be filled with B3, as T1
(AIB3), programming jump is to 3..
(3) C phase virtual values are taken, rear T values find that data are basically unchanged, belong to normal than preceding T values；In above-mentioned T1(AIBI) in
C1 is filled with, as T1(AIBIC1), programming jump is to 1.；If it find that data are strongly reduced close to 0 (＜ 1kV), C phases are judged to
Earth fault；In above-mentioned T1(AIBI) in be filled with C0, as T1(AIBIC0), programming jump is to 1.；If it find that data are reduced to
Close to about 5KV ± 5%, two-phase short trouble is judged to；In above-mentioned T1(AIBI) in be filled with C2, as T1(AIBIC2), program
Jump to 1.；If it find that data are drastically raised close to 17.3KV ± 5%, it is judged to A phases or B phases is grounded；In above-mentioned T1(AIBI)
In be filled with C3, as T1(AIBIC3), programming jump is to 1..
5.4 recognize fault type based on character string is filled out
(1) correctness of preceding 2 cycle Ts 1----T2 character strings is checked
The content of T1----T2 character strings all should be (A1B1C1), if any not being inconsistent individually, make record and circulate a notice of to user；
(2) T20----T9 order identification string failure judgements are pressed from back to front
The character string for comparing T20----T9 one by one is all identicalThere are the different sequence numbers and number N for then counting lower T；
Number N ＜ 4Less than then recording 3 No. T, into anomalous identification processing；Normal is down：
1 typical character string in the identical data cycle T that occupies the majority is taken to carry out Fault Identification processing：
T ()=EA(A0B3C3) A phase earth faults, are belonged to；It is not then down；
T ()=EB(B0A3C3) B phase earth faults, are belonged to；It is not then down；
T ()=EC(C0A3B3) C phase earth faults, are belonged to；It is not then down；
T ()=FA(A0B1C1) A phase open circuit faults, are belonged to；It is not then down；
T ()=FB(B0A1C1) B phase open circuit faults, are belonged to；It is not then down；
T ()=FC(C0A1B1) C phase open circuit faults, are belonged to；It is not then down；
T ()=GAB(A2B2C1) AB two-phase short troubles, are belonged to；It is not then down；
T ()=GBC(B2C2A1) BC two-phase short troubles, are belonged to；It is not then down；
T ()=GAC(A2C2B1) AC two-phase short troubles, are belonged to；It is not then down；
T ()=HAB(A0B0C1) AB two-phase short circuit grounding failures, are belonged to；It is not then down；
T ()=HBc(B0C0A1) BC two-phase short circuit grounding failures, are belonged to；It is not then down；
T ()=HAC(A0C0B1) AC two-phase short circuit grounding failures, are belonged to；It is not then down；
T ()=IABC(A4B4C4) ABC three phase short circuit faults, are belonged to；It is not then down；
T ()=JABC(A0B0C0) ABC three-phase shortcircuit earth faults, are belonged to；It is not then to enter anomalous identification to handle.
5.5 abnormal conditions identifying processings
The each ABC phase acquisitions 1T data in order of the present apparatus, judge this point data at once；The time sequencing of extraction
It is：Point alarm three-phase data difference 3T, 4T ∽ 8T (common 6T) virtual value；
If 1. three-phase is all voltage rise trend, mainly thunderbolt influence is differentiated；
Then compare 9T, 10T ... 20T data, be followed by reduced to normally, provide if raising several cycles
Moment thunderbolt alarm；
If 2. single-phase voltage rise trend, other are mutually normal, also provide phase moment thunderbolt interference and alarm；
3. if it find that single monitoring point is single-phase or 2 phases, 3 phase voltages are in a slight decrease, recover normal after 9T, 10T, sentence the point
Correspondence low-voltage circuit fault impact；Increase T data many to instant of failure carry out 64 sub-frequency analysis (sampling rate 6400HZ), survey
Harmonic wave it is secondary high when illustrate that failure comes from low-pressure side, harmonic wave points out that failure comes from high-pressure side when secondary low.
Alarm failure position is exactly the monitoring point location.
Claims (4)
1. the distribution line failure identifying device based on voltage monitoring, it is characterized in that：The voltage of three-phase line is gathered simultaneously, online
When Lu Yixiang or multiphase break down, device automatically extracts the data in several cycles before and after failure, and three are analyzed by synchronizing cycle
Mutually respective voltage status, determines the actual correspondence different faults type of various combination of three-phase voltage state so that the present apparatus
It can recognize that distribution line is no less than following 6 kinds of failures simultaneously：Single-phase earthing, single-phase wire break, line to line fault, line to line fault ground connection,
Three-phase shortcircuit, three-phase shortcircuit ground connection.
2. the data characteristicses especially determined during identification distribution line different faults type are：On line during any position single-phase earthing --
Earth fault phase voltage decreases closer to 0, and ungrounded two-phase voltage rise is close to conventional 1.73 times；Any position is single-phase on line
During broken string -- the effective value mutation of each point voltage cycle is close to 0 after breakpoint, and breakpoint is constant toward bus terminal voltage, and non-broken string is mutually electric
Pressure is constant；When any position two-phase is short-circuit on line -- short-circuit line voltage jump halves, and non-shorting phase voltage is constant；Any bit on line
When putting three-phase shortcircuit -- it is 0 that three-phase voltage, which substantially reduces convergence,；When the monitoring of distribution line failure identifying device analyzes these numbers
The fault type for identifying distribution line according to that counter can be pushed away during feature.
3. a feature based on voltage monitoring is from distribution transformer low-pressure side collection voltages, makes to distinguish during Fault Identification and match somebody with somebody
Electric high-voltage line failure and low-voltage line failure, area's method for distinguishing have two：One is malfunction monitoring point correspondence access distribution high-voltage line
Place, is differentiated by fault impact degree according to adjacent monitoring point data on line, is usually low-voltage line failure when data are basically unchanged,
And the failure occurred on distribution high-voltage line must influence completely multiple monitoring points, need to set up certain between so neighbouring monitoring point
Correspondence；Two be analyze the malfunction monitoring point since failure occur several periodic voltage data frequency spectrum, frequency into
Split-phase to it is high when judge that this failure is caused by low-pressure side circuit, judge that this failure is drawn by high-pressure side when frequency content is relatively low
Rise.
4. present apparatus data processing features when doing Fault Identification are by " fault category character string " method, system can be made towards three
The data that phase line is largely gathered and handled, can recognize quick, efficient and standardization；This method is when fault data is handled by number
Character string is filled according to feature, fault type is determined by identification string；Here the character string standardized is：
A phases, which are grounded character string EA----A0B3C3, B phase and are grounded character string EB---B0A3C3, C phase, is grounded character string EC----
C0A3B3；
A phases character string FA----A0B1C1, B phase character string FB----B0A1C1, the C phase that breaks that breaks breaks character string FC-----
C0A1B1；
The short-circuit character string GAC--- of short-circuit character string GBC----B2C2A1, AC of AB short circuit character strings GAB----A2B2C1, BC
A2C2B1；
AB short ground character string HAB----A0B0C1, BC short ground character string HBC----B0C0A1, AC short ground character string HAC---
A0C0B1；
ABC three phase short circuit fault character strings IABC----A4B4C4, three-phase shortcircuit earth fault character string JABC0----
A0B0C0。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710173112.0A CN106990321A (en) | 2017-03-22 | 2017-03-22 | Distribution line failure identifying device based on voltage monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710173112.0A CN106990321A (en) | 2017-03-22 | 2017-03-22 | Distribution line failure identifying device based on voltage monitoring |
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| CN108051696A (en) * | 2017-12-11 | 2018-05-18 | 李玉诚 | A kind of detection method for detection device connection status |
| CN110275091A (en) * | 2019-07-03 | 2019-09-24 | 武汉武大英康集成媒体有限公司 | A kind of industrial enterprise's power fault detection system |
| CN110366294A (en) * | 2019-07-19 | 2019-10-22 | 四川艾贝斯科技发展有限公司 | A kind of burglar alarm and fault monitoring method of road lamp system |
| CN111108398A (en) * | 2017-09-29 | 2020-05-05 | 勃林格殷格翰维特梅迪卡有限公司 | Testing and calibration of circuit arrangements |
| CN111157835A (en) * | 2018-11-07 | 2020-05-15 | 国网电力科学研究院武汉南瑞有限责任公司 | Power grid single-phase earth fault judgment method |
| CN111198540A (en) * | 2018-11-19 | 2020-05-26 | 故城北新建材有限公司 | Equipment monitoring method and device |
| CN112798906A (en) * | 2021-03-11 | 2021-05-14 | 国网新疆电力有限公司乌鲁木齐供电公司 | System for identifying and positioning short-circuit fault of high-voltage line based on low-voltage power distribution |
| CN112904150A (en) * | 2021-03-11 | 2021-06-04 | 国网新疆电力有限公司乌鲁木齐供电公司 | System for recognizing and positioning high-voltage line disconnection fault based on low-voltage power distribution |
| CN113506432A (en) * | 2021-07-07 | 2021-10-15 | 安徽理工大学 | Large-scale server power failure alarm |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
| CN115993504A (en) * | 2023-03-23 | 2023-04-21 | 山东盛日电力集团有限公司 | Intelligent fault diagnosis method and system for electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111108398A (en) * | 2017-09-29 | 2020-05-05 | 勃林格殷格翰维特梅迪卡有限公司 | Testing and calibration of circuit arrangements |
| CN108051696A (en) * | 2017-12-11 | 2018-05-18 | 李玉诚 | A kind of detection method for detection device connection status |
| CN111157835B (en) * | 2018-11-07 | 2023-01-24 | 国网电力科学研究院武汉南瑞有限责任公司 | Power grid single-phase earth fault judgment method |
| CN111157835A (en) * | 2018-11-07 | 2020-05-15 | 国网电力科学研究院武汉南瑞有限责任公司 | Power grid single-phase earth fault judgment method |
| CN111198540A (en) * | 2018-11-19 | 2020-05-26 | 故城北新建材有限公司 | Equipment monitoring method and device |
| CN110275091A (en) * | 2019-07-03 | 2019-09-24 | 武汉武大英康集成媒体有限公司 | A kind of industrial enterprise's power fault detection system |
| CN110366294A (en) * | 2019-07-19 | 2019-10-22 | 四川艾贝斯科技发展有限公司 | A kind of burglar alarm and fault monitoring method of road lamp system |
| CN112798906A (en) * | 2021-03-11 | 2021-05-14 | 国网新疆电力有限公司乌鲁木齐供电公司 | System for identifying and positioning short-circuit fault of high-voltage line based on low-voltage power distribution |
| CN112904150A (en) * | 2021-03-11 | 2021-06-04 | 国网新疆电力有限公司乌鲁木齐供电公司 | System for recognizing and positioning high-voltage line disconnection fault based on low-voltage power distribution |
| CN113506432A (en) * | 2021-07-07 | 2021-10-15 | 安徽理工大学 | Large-scale server power failure alarm |
| CN114660500A (en) * | 2022-05-19 | 2022-06-24 | 秦皇岛广控科技有限公司 | Three-phase monitoring protection system |
| CN115993504A (en) * | 2023-03-23 | 2023-04-21 | 山东盛日电力集团有限公司 | Intelligent fault diagnosis method and system for electrical equipment |
| CN115993504B (en) * | 2023-03-23 | 2023-08-18 | 山东盛日电力集团有限公司 | Intelligent fault diagnosis method and system for electrical equipment |
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