CN108169628A - Identification lightning fault property and the device and method for being accurately positioned trouble point - Google Patents
Identification lightning fault property and the device and method for being accurately positioned trouble point Download PDFInfo
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- CN108169628A CN108169628A CN201810138483.XA CN201810138483A CN108169628A CN 108169628 A CN108169628 A CN 108169628A CN 201810138483 A CN201810138483 A CN 201810138483A CN 108169628 A CN108169628 A CN 108169628A
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- lightning
- traveling wave
- trouble point
- oscillograph
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a kind of devices for identifying lightning fault property and being accurately positioned trouble point, including traveling wave monitoring and oscillograph, traveling wave monitors one end and electric unit is taken to connect with using the coupling for coupling way to take power power supply, the other end is connect with the oscillograph, traveling wave monitor with oscillograph by can carry out upload monitoring information and down biography control command GPRS/CDMA communication modules connect with background service display, coupling takes electric unit to be connect with GPS module and clock module, GPS module is connected with each other with clock module, the other end of GPS module is connected with traveling wave monitoring, the other end of clock module is connect with background service display；A kind of method for identifying lightning fault property and being accurately positioned trouble point by the different transient state travelling wave feature recognitions lightning stroke property formed when thunderbolt and counterattack, and is combined with traveling wave positioning using deciding field and is accurately positioned trouble point.The present invention can quickly determine its trip reason, and can quickly find accurate trouble point.
Description
Technical field：
The present invention relates to a kind of device and method for identifying lightning fault property and fault point, more particularly to a kind of identification
Lightning fault property and the device and method for being accurately positioned trouble point.
Background technology：
Today of extra-high voltage development is pressed to by superelevation in transmission line of electricity voltage class, lightning stroke is still that transmission line malfunction is caused to be opened
Disconnected one of the major reasons become the weak link in current line safe operation, at present, are coping with and handling transmission line of electricity thunder
In terms of hitting accident, the widely used lightning location system of electric system and Travelling Wave Fault Location system determine lightning fault position, auxiliary
Help analysis lightning fault type.But it has the following disadvantages：（1）It there is no the monitoring hand that accurate confirmation trip accident is lightning strike accident
Section；Since the moment occurs for thunder and lightning, lightning fault continuously largely occurs, according to failure markers with sentencing during lightning location system markers pair
Also there are certain difficulties for disconnected lightning fault.Simultaneously induced overvoltage caused by the lightning stroke near thunderbolt circuit may be superimposed it is filthy,
The weak links such as vegetation cause flashover to trip.Therefore, whether accurate judgement circuit is thunder and lightning direct lightning strike（Shielding or counterattack）Failure,
A kind of direct monitoring means is needed in production practices；（2）There are no the technological means of effective identification shielding or counterattack；Due to
Lightning location system has large error in terms of amplitude of lightning current is determined at present, in addition lightning discharge dispersibility, currently based on thunder
The record combination electric geometry method of electric alignment system judges that lightning fault type is also quite rough, also has indivedual offices to make at present
With on each insulator chain of every base shaft tower install sensor method, even if this method is feasible, nor a kind of reality
Technology, since it is desired that the equipment of installation is disperseed very much too much；（3）Position inaccurate, and the easily influence of interfered signal；Traveling wave
Alignment system is usually difficult to this method reliable accurate due to being influenced by factors such as landform, arc sag, velocity of wave and interference signals
Positioning, in addition during thunderstorm weather various induction lightening travelling wave signals interference, make lightning failure point be accurately positioned relative difficulty.
Invention content：
The technical problems to be solved by the invention are：One kind is overcome the deficiencies of the prior art and provide by thunderbolt and counterattack
When the different transient state travelling wave feature recognitions lightning stroke property that is formed, and be combined with traveling wave positioning using deciding field be accurately positioned it is former
Hinder the identification lightning fault property of point and be accurately positioned the device and method of trouble point.
The present invention is for the technical solution adopted for solving the technical problem：
A kind of device for identifying lightning fault property and being accurately positioned trouble point, including traveling wave monitoring and oscillograph, the traveling wave
Monitoring one end takes electric unit to connect with using the coupling for coupling way to take power power supply, and the other end is connect with the oscillograph, described
Traveling wave is monitored uploads monitoring information and down the GPRS/CDMA communication modules of biography control command with the oscillograph by that can carry out
It is connect with background service display, the coupling takes electric unit to be connect with GPS module and clock module, the GPS module and institute
Clock module interconnection is stated, the other end of the GPS module is connected with traveling wave monitoring, the other end of the clock module
It is connect with the background service display.
The traveling wave monitoring includes high speed data acquisition system, MCU micro-control units, FPGA, ADC real-time collector and voltage
Sensor, high speed data acquisition system are bi-directionally connected with MCU micro control units and FPGA, and MCU micro control units and FPGA are bi-directionally connected, high
Fast data collector is unidirectionally connect with ADC real-time collectors and voltage sensor.
Traveling wave monitoring of the traveling wave monitoring for monitoring fault message, the oscillograph is the recording of record current waveform
Device, the clock module are the clock module formed using high stability crystal oscillator, and the GPS module is controlled with signal at GPS pairs
Sampling pulse.
A kind of method for identifying lightning fault property and being accurately positioned trouble point, includes the following steps：
（1）According to the waveform recognition tripping property of transient state travelling wave on oscillograph；Oscillograph and traveling wave monitoring can pass through GPRS/CDMA
Communication module reaches data and figure on background service display, and the figure of transient state travelling wave is checked on background service display
Shape, to determine whether be lightning stroke trip, if lightning stroke trip judges that lightning stroke trip is shielding tripping or anti-according to waveform
Hit tripping, when shielding is tripped, the conducting wire that lightning current hits transmission line of electricity causes flashover, after the conducting wire is breakdown lightning current pass through compared with
Short shaft tower enters ground, due to the effect of Tower Surge Impedance and ground-reflected wave, can make to have very along the lightning current waveform of line transmission
Precipitous failing edge and then relatively low amplitude；During counterattack tripping, lightning current hits lightning conducter or shaft tower causes insulator chain to dodge
Network trips, and after insulator chain is breakdown, longer lightning current wave rear can be further separated into the wire spread of transmission line of electricity, the lightning current
Waveform has very steep rising edge and the wave rear slowly declined relatively；
（2）Deciding field is carried out to failure；Guilty culprit area is determined using the method for detecting system power frequency short circuit current flow direction
Between, if a certain section is broken down, the current phase in both sides section is on the contrary, if circuit is single-ended power, far
Without power frequency fault current in section from power supply side；
（3）Trouble point is determined in fault section；In fault section trouble point is determined using the method for traveling wave positioning.
The present invention positive beneficial effect be：
1st, present invention employs a kind of completely new identification lightning fault property and the method for being accurately positioned trouble point, this method passes through
The different transient state travelling wave feature recognitions lightning stroke property formed when thunderbolt and counterattack, and position phase using deciding field and traveling wave
With reference to trouble point is accurately positioned, the drawbacks of conventional method needs to install monitoring device by base shaft tower is overcome, it is only necessary in circuit
Completely it is every 15 ~ 20 kilometers installation one observation point can realize full line lightning stroke property monitoring, be current techniques it is advanced and
Practicability very strong lightning fault property identification and alignment system.
2nd, MCU micro-control units are combined with FPGA in the present invention, take full advantage of programmable logic device parallel, high speed
The advantage of feature and MCU in terms of task processing, not only ensure that the speed of data sampling, but also solved and handle it with low speed task
Between contradiction.
3rd, the clock module in the present invention is the clock module that a high stability crystal oscillator is formed, and adopts cable both ends traveling wave
Accurate clock is kept to synchronize between acquisition means, reduces walking time error；And according to oscillograph institute wave recording, can correctly it divide
Analysis judges definite place, evolution and the fault type that electric system, circuit and equipment fault occur, to exclude event rapidly
Barrier and formulation Prevent countermeasures.
4th, GPS module controls sampling pulse with signal at GPS pairs in the present invention, as being less than l microseconds using error in GPS
Lpps pulses generate sampling pulse after high stability crystal oscillation fractional frequency, make net internal affairs oscillograph to solve existing GPS setting means
Between by control errors at l milliseconds hereinafter, realizing that the whole network markers truly is unified and sampling while property.
Description of the drawings：
Fig. 1 is present invention identification lightning fault property and is accurately positioned the structure connection block diagram of the device of trouble point；
Fig. 2 is present invention identification lightning fault property and is accurately positioned the flow chart of the method for trouble point；
Fig. 3 is the typical traveling-wave waveform being struck by lightning under shielding accident；
Fig. 4 is the typical traveling-wave waveform being struck by lightning under counterattack accident；
Fig. 5 is deciding field and traveling wave positioning principle schematic diagram.
Specific embodiment：
The present invention is made further explanation and description in the following with reference to the drawings and specific embodiments：
Embodiment：A kind of device for identifying lightning fault property and being accurately positioned trouble point, including traveling wave monitoring and oscillograph, row
Wave monitors one end and electric unit is taken to connect with using the coupling for coupling way to take power power supply, and the other end is connect with oscillograph, traveling wave prison
It surveys and uploads monitoring information and down the GPRS/CDMA communication modules and background service of biography control command by that can carry out with oscillograph
Display connects, and coupling takes electric unit to be connect with GPS module and clock module, and coupling takes electric unit coupling to take electricity normal work electricity
Ranging from 30A~1500A is flowed, GPS module is connected with each other with clock module, and the other end and the traveling wave monitoring of GPS module connect,
The other end of clock module is connect with background service display.
Traveling wave monitoring includes high speed data acquisition system, MCU micro-control units, FPGA, ADC real-time collector and voltage sensor
Device, high speed data acquisition system are bi-directionally connected with MCU micro control units and FPGA, and MCU micro control units and FPGA are bi-directionally connected, high speed number
It is unidirectionally connect with ADC real-time collectors and voltage sensor according to collector.
High speed data acquisition system controls ADC real-time collector gathered datas, and judges whether to break down, if without failure
Occur, data are stored in SRAM；Otherwise, the markers of GPS module need to be locked, notifies MCU micro-control units that will record in time
Under fault waveform and time scale information take away；MCU micro-control units are responsible for obtaining failure correlation letter from FPGA when breaking down
Breath, and pass through GPRS/CDMA communication modules and upload the data to background service display, complete the telecommunication task of data.
Traveling wave monitoring of the traveling wave monitoring for monitoring fault message, oscillograph of the oscillograph for record current waveform, clock mould
Block is the clock module formed using high stability crystal oscillator, and GPS module controls sampling pulse with signal at GPS pairs.
A kind of method for identifying lightning fault property and being accurately positioned trouble point, includes the following steps：
（1）According to the waveform recognition tripping property of transient state travelling wave on oscillograph；Oscillograph and traveling wave monitoring can pass through GPRS/CDMA
Communication module reaches data and figure on background service display, and the figure of transient state travelling wave is checked on background service display
Shape, to determine whether be lightning stroke trip, if lightning stroke trip judges that lightning stroke trip is shielding tripping or anti-according to waveform
Hit tripping, when shielding is tripped, the conducting wire that lightning current hits transmission line of electricity causes flashover, after the conducting wire is breakdown lightning current pass through compared with
Short shaft tower enters ground, due to the effect of Tower Surge Impedance and ground-reflected wave, can make to have very along the lightning current waveform of line transmission
Precipitous failing edge and then relatively low amplitude, as shown in Figure 3；During counterattack tripping, lightning current hits lightning conducter or shaft tower causes
Insulator chain flashover trips, and after insulator chain is breakdown, the conducting wire that longer lightning current wave rear can be further separated into transmission line of electricity passes
It broadcasts, which has very steep rising edge and the wave rear slowly declined relatively, as shown in Figure 4.
（2）Deciding field is carried out to failure；Failure institute is determined using the method for detecting system power frequency short circuit current flow direction
In section, if a certain section is broken down, the current phase in both sides section is opposite, if circuit is single-ended power,
Without power frequency fault current in section then far from power supply side, as shown in figure 5, setting transmission line of electricity is at the shaft towers such as i, j, m, n
The detection device of fault-signal is installed, present jth base shaft tower is to trip accident is had occurred between m base shaft towers, at this point, at i j
Power frequency fault current phase with the power frequency fault current phase at m n be opposite（In single-ended power, without power frequency at m n
Fault current）, using this simple logic principle, can sufficiently accurately determine that failure is happened between j m, the accurate of section is determined
Position can also exclude the influence of the various interference signals that may cause large error, since deciding field is short using system power frequency
The method of road current direction, deciding field have very high reliability.
（3）Trouble point is determined in fault section；In fault section trouble point is determined using the method for traveling wave positioning,
Due to fault section it has been determined that so the fault section of traveling wave positioning shortens, the line in proportion of the error caused by landform arc sag
Property reduce；, only need to be to m sections of implementation traveling wave positioning of j after fault section determines between j m, the error that landform arc sag is brought is by two
Part forms, and a part is to calculate distance of the trouble point apart from one end in theory：, whereinFor length of the trouble point apart from busbar M points, v is velocity of wave, and Tm and Tn are respectively the absolute time for reaching M ends and N-terminal, and L tables
Show total track length；Total track length L should be the straight of length rather than shaft tower the distance expression of length, that is, conducting wire of traveling wave at this time
Linear distance；Another part error is obtained according to location CalculationIt is generated during the spatial position for going positioning failure, error, whereinRepresent the shaft tower air line distance of the fault point position on map；Two parts error can be
Offset, while it was noted that two parts error all in a linear relationship with the size in section (the L coefficients of first part are 1/2, the
Two partsCoefficient be 1), therefore when section become it is small when, the error caused by landform arc sag can be in scale smaller, according to
The influence of actual conditions, landform and arc sag may cause air line distance error between the length of actual wire and shaft tower up to 5% with
On, 3 kilometers of error is meaned for one 60 kilometers of circuit, 5%, it is contemplated that the cancellation effect of two parts error, if error
It it is 1 kilometer, therefore, if every 10 kilometers of sections, error will narrow down to 1/6 kilometer.
During work, oscillograph carries out current recording, and oscillograph and traveling wave monitoring will by GPRS/CDMA communication modules
Data and waveform are sent on background server, are shown by display, when trip event occurs, by display
On check different transient state travelling wave features judge to identify its be struck by lightning property, and using deciding field with traveling wave positioning be combined accurately
Fault point overcomes the drawbacks of conventional method needs to install monitoring device by base shaft tower, it is only necessary to circuit it is completely every 15 ~
20 kilometers of installations, one observation point can realize the monitoring of full line lightning stroke property.
The above is only the preferred embodiments of the present invention, does not make limitation in any form to the present invention, all
It is any simple modification, equivalent change and modification that technical spirit according to the present invention makees above example, still falls within
In the protection domain of technical solution of the present invention.
Claims (4)
1. a kind of device for identifying lightning fault property and being accurately positioned trouble point, including traveling wave monitoring and oscillograph, feature
It is：The traveling wave monitors one end and electric unit is taken to connect with using the coupling for coupling way to take power power supply, the other end and the recording
Device connects, and the traveling wave monitoring uploads monitoring information and the down GPRS/ of biography control command with the oscillograph by that can carry out
CDMA communication modules are connect with background service display, and the coupling takes electric unit to be connect with GPS module and clock module, described
GPS module is connected with each other with the clock module, and the other end of the GPS module is connected with traveling wave monitoring, the clock
The other end of module is connect with the background service display.
2. identification lightning fault property according to claim 1 and the device for being accurately positioned trouble point, it is characterized in that：It is described
Traveling wave monitoring includes high speed data acquisition system, MCU micro-control units, FPGA, ADC real-time collector and voltage sensor, at a high speed
Data collector is bi-directionally connected with MCU micro control units and FPGA, and MCU micro control units and FPGA are bi-directionally connected, high-speed data acquisition
Device is unidirectionally connect with ADC real-time collectors and voltage sensor.
3. identification lightning fault property according to claim 1 and the device for being accurately positioned trouble point, it is characterized in that：It is described
Traveling wave monitoring of the traveling wave monitoring for monitoring fault message, oscillograph of the oscillograph for record current waveform, the clock mould
Block is the clock module formed using high stability crystal oscillator, and the GPS module controls sampling pulse with signal at GPS pairs.
4. a kind of method for identifying lightning fault property and being accurately positioned trouble point, includes the following steps：
（1）According to the waveform recognition tripping property of transient state travelling wave on oscillograph；Oscillograph and traveling wave monitoring can pass through GPRS/CDMA
Communication module reaches data and figure on background service display, and the figure of transient state travelling wave is checked on background service display
Shape, to determine whether be lightning stroke trip, if lightning stroke trip judges that lightning stroke trip is shielding tripping or anti-according to waveform
Hit tripping, when shielding is tripped, the conducting wire that lightning current hits transmission line of electricity causes flashover, after the conducting wire is breakdown lightning current pass through compared with
Short shaft tower enters ground, due to the effect of Tower Surge Impedance and ground-reflected wave, can make to have very along the lightning current waveform of line transmission
Precipitous failing edge and then relatively low amplitude；During counterattack tripping, lightning current hits lightning conducter or shaft tower causes insulator chain to dodge
Network trips, and after insulator chain is breakdown, longer lightning current wave rear can be further separated into the wire spread of transmission line of electricity, the lightning current
Waveform has very steep rising edge and the wave rear slowly declined relatively；
（2）Deciding field is carried out to failure；Guilty culprit area is determined using the method for detecting system power frequency short circuit current flow direction
Between, if a certain section is broken down, the current phase in both sides section is on the contrary, if circuit is single-ended power, far
Without power frequency fault current in section from power supply side；
（3）Trouble point is determined in fault section；In fault section trouble point is determined using the method for traveling wave positioning.
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| CN109901023A (en) * | 2019-04-08 | 2019-06-18 | 国网上海市电力公司 | Fault transient data acquisition terminal, system and method on distribution network line column |
| CN110426607A (en) * | 2019-06-03 | 2019-11-08 | 江苏德大石化科技有限公司 | The monitoring system of arc flash occurs for a kind of identification lightning current |
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| CN111239546A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Lightning overvoltage on-line distance measurement and fault location method |
| CN111458597A (en) * | 2020-02-06 | 2020-07-28 | 云南电网有限责任公司电力科学研究院 | Fault positioning method based on lightning overvoltage phase transmission characteristic |
| CN115577272A (en) * | 2022-12-06 | 2023-01-06 | 昆明理工大学 | Multiple lightning stroke discrimination method based on fault recording data |
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