CN107064713A - A kind of electric line broken string method of discrimination and system - Google Patents
A kind of electric line broken string method of discrimination and system Download PDFInfo
- Publication number
- CN107064713A CN107064713A CN201710172745.XA CN201710172745A CN107064713A CN 107064713 A CN107064713 A CN 107064713A CN 201710172745 A CN201710172745 A CN 201710172745A CN 107064713 A CN107064713 A CN 107064713A
- Authority
- CN
- China
- Prior art keywords
- point
- monitoring signals
- electric line
- transmitting
- little
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a kind of electric line broken string method of discrimination and system, methods described includes：Using at least the one of an electric line at least phase line as transmitting an injection monitoring signals；In the electric line monitoring signals will be received with a little corresponding predeterminated position that transmits as point of collecting mail；Whether the monitoring signals are received according to the point of collecting mail, the on off operating mode of circuit between determining the collection of letters point and transmitting a little.
Description
Technical field
The present invention relates to line upkeep technology, and in particular to a kind of electric line broken string method of discrimination and system.
Background technology
The effect of electric line is conveying and distribution electric energy, is generally set up in power plant to regional transformer station, area and becomes
Between power station and regional transformer station, the circuit referred to as transmission line of electricity for conveying electric energy is line voltage distribution the characteristics of transmission line of electricity
Height, fed distance is remote, and transmission capacity is big.From network system to the circuit of customer power supply and town and country transformation between, for point
Circuit with electric energy is referred to as distribution line.Either transmission line of electricity, or distribution line, is conveying and is distributing the process of electric energy
In, various failures often occur, wherein, the disconnection fault of electric line is one of failure of the difficult differentiation of comparison.
The broken string of electric line belongs to open conductors, different from the short circuits that short circuit is formed.During generation open conductors,
Two nodes constitute non-working port at broken string, and when two nodes have open-circuit voltage, circuit will appear from positive sequence, negative phase-sequence and zero
Order components.Thus, a kind of method of identification electric line disconnection fault is generated in the prior art, is matched somebody with somebody using asymmetrical component
Zero setting negative phase-sequence element recognizes electric line disconnection fault, still, is influenceed by power system operation mode and electric network composition
It is larger, cause accuracy rate of the method in identification disconnection fault relatively low.
There is a kind of method for recognizing disconnection fault in the prior art, be exactly the open circuit electricity after being broken using electric line
The electric measure feature that pressure is produced is identified.But break when electric line zero load or underloading, open-circuit voltage very little,
The electrical quantity of electric line may not change substantially, so that the electric line disconnection fault of unloaded or underloading can be caused
It is difficult to.
Shortcoming of the both the above method in identification disconnection fault, may bring danger to the stable operation of power system
Evil.
Therefore, easily by power system operation mode and the shadow of electric network composition in terms of the identification of electric line disconnection fault
Ring, cause identification inaccurate, and being difficult in the case of unloaded or underloading, it is urgent problem to be solved.
The content of the invention
In view of this, the embodiment of the present invention is expected to provide a kind of electric line broken string method of discrimination and system, Bu Huishou
To the influence of power system operation mode and electric network composition, and electric line broken string event can be accurately identified under various loads
Barrier.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The embodiments of the invention provide a kind of electric line broken string method of discrimination, methods described includes：
Using at least the one of an electric line at least phase line as transmitting an injection monitoring signals；
In the electric line monitoring letter will be received with a little corresponding predeterminated position that transmits as point of collecting mail
Number；
Whether the monitoring signals are received according to the point of collecting mail, circuit between determining the collection of letters point and transmitting a little
On off operating mode.
Preferably, it is described using at least the one of an electric line at least phase line as transmitting an injection monitoring signals,
Including：
Using at least the one of an electric line at least phase line as transmitting an injected frequency different from the power transmission and distribution
The monitoring signals of circuit itself electric energy frequency.
Preferably, at using at least the one of an electric line at least phase line as transmit injection monitoring signals it
Afterwards, methods described also includes：
Impedance matching is carried out to the monitoring signals, strengthens the transimission power of the monitoring signals.
Preferably, institute will received as point of collecting mail with a little corresponding predeterminated position that transmits in the electric line
State before monitoring signals, methods described also includes：
The signal of reception is filtered, the power frequency amount and harmonic signal of the electric line is filtered out.
Preferably, it is described that whether the monitoring signals are received according to the point of collecting mail, determine the point of collecting mail with transmitting
The on off operating mode of circuit between point, including：
When the point of collecting mail receives the monitoring signals in preset time, determine the point of collecting mail with transmitting point
Between circuit connection；
When the point of collecting mail does not receive the monitoring signals in preset time, and the point of collecting mail is transmitted with described
Point is transmitted the distance between a little in preset range positioned at same phase line, collection of letters point with described, determine it is described collect mail point and
Circuit between transmitting a little breaks.
The embodiment of the present invention additionally provides a kind of electric line broken string judgement system, the system include transmitter unit,
Receiving device unit and judge decision package；Wherein,
The transmitter unit, for will monitor as transmitting an injection at least the one of an electric line at least phase line
Signal；
The receiver unit, for the collection of letters will to be used as with a little corresponding predeterminated position that transmits in the electric line
Point receives the monitoring signals；
The judgement decision package, for whether receiving the monitoring signals according to the point of collecting mail, determines the receipts
The on off operating mode of circuit between believing point and transmitting a little.
Preferably, the transmitter unit specifically for：
Using at least the one of an electric line at least phase line as transmitting an injected frequency different from the power transmission and distribution
The monitoring signals of circuit itself electric energy frequency, and the information of the monitoring signals is notified into the judgement decision package.
Preferably, the transmitter unit is additionally operable to：
At using at least the one of an electric line at least phase line as after transmitting injection monitoring signals, to described
Monitoring signals carry out impedance matching, strengthen the transimission power of the monitoring signals.
Preferably, the receiver unit specifically for：The monitoring signals are received, and reception condition is notified into the judgement
Decision package；
The receiver unit is additionally operable to：
In the electric line monitoring will be being received with a little corresponding predeterminated position that transmits as point of collecting mail
Before signal, the signal of reception is filtered, the power frequency amount and harmonic signal of the electric line is filtered out.
Preferably, it is described judgement decision package specifically for：
When the point of collecting mail receives the monitoring signals in preset time, determine the point of collecting mail with transmitting point
Between circuit connection；
When the point of collecting mail does not receive the monitoring signals in preset time, and the point of collecting mail is transmitted with described
Point is transmitted the distance between a little in preset range positioned at same phase line, collection of letters point with described, determine it is described collect mail point and
Circuit between transmitting a little breaks.
Electric line broken string method of discrimination provided in an embodiment of the present invention and system, by an electric line at least phase line
As transmitting an injection monitoring signals at least the one of road；In the electric line a little corresponding default position will be transmitted with described
Put and receive the monitoring signals as point of collecting mail；Whether the monitoring signals are received according to the point of collecting mail, the receipts are determined
The on off operating mode of circuit between believing point and transmitting a little；It can be seen that, the embodiment of the present invention in an electric line at least phase line extremely
As transmitting an injection monitoring signals at few one, in electric line with it is described transmit a little corresponding predeterminated position as the collection of letters
Point receives the monitoring signals, and then by whether can receive the monitoring signals to determine whether the electric line breaks
Line, will not both be influenceed by power system operation mode and electric network composition, and can accurately and rapidly know under various loads
The disconnection fault of other electric line, the scope of application is wider.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the electric line of the embodiment of the present invention one broken string method of discrimination；
Fig. 2 is the composition structural representation of the electric line of the embodiment of the present invention two broken string judgement system；
Fig. 3 is the composition structural representation of transmission line of electricity broken string judgement system between the transformer station of the embodiment of the present invention three.
Embodiment
In order to more understand the features of the present invention and technology contents in detail, below in conjunction with reality of the accompanying drawing to the present invention
Now it is described in detail, appended accompanying drawing purposes of discussion only for reference, not for limiting the present invention.
Embodiment one
Fig. 1 is that electric line of the embodiment of the present invention breaks the schematic flow sheet of method of discrimination, in the embodiment of the present invention, is needed
The main body for differentiating electric line broken string can be electric line control protection device, and methods described can be by electric line control
Protection device realizes that the electric line control protection device referred to as controls protection device, as shown in figure 1, methods described includes：
Step 101：Using at least the one of an electric line at least phase line as transmitting an injection monitoring signals；
Here, the monitoring signals are independently of the electric line, therefore will not be by Operation of Electric Systems side
The influence of formula and electric network composition, it is more accurate to monitor.
The electric line can have in multi-phase circuit, the embodiment of the present invention, can be with injection on a phase line wherein
Monitoring signals, only monitor the break-make of a wherein phase line；Different monitoring signals can also be injected separately on each phase line, point
The break-make of each phase line is not monitored.
The monitoring signals can include electric signal and acoustic signals；The electric signal refers to the electricity changed over time
Pressure or electric current, therefore it can be expressed as on mathematical description the function of time, and its waveform can be drawn；The acoustic signals exist
The spread speed in the far super air of spread speed in solid, usually, spread speed of the acoustic signals in fine copper is reachable
3750 meter per seconds, and the aerial spread speed of acoustic signals is only 340 meter per seconds, it is possible to by being noted in electric line
Enter acoustic signals to determine the broken string situation of electric line；
In theory, the monitoring signals of any frequency can serve as the monitoring signals in the embodiment of the present invention, but in order to keep away
From the interference to electric line itself electric energy, control protection device is typically chosen frequency different from the electric line itself electricity
The signal of energy frequency, and the frequency of the signal can not be identical with the frequency for the harmonic wave for endangering the quality of power supply.
Preferably, the frequency of the electric signal can select 300~20000Hz scope, this frequency range, implement letter
Single, propagation distance is also distant；The acoustic signals can be ultrasonic signal, and frequency range preferably can be 20000Hz
~60000Hz；
In actual use, electric signal is typically chosen as monitoring signals；Relative to acoustic signals, electric signal is easier reality
Apply, use is more extensive.
Further, can be to transmitting a little continual injection monitoring signals in order to recognize disconnection fault in time.
Further, it is described using at least the one of an electric line at least phase line as transmitting an injection monitoring letter
After number, this step also includes：
Impedance matching is carried out to the monitoring signals, strengthens the transimission power of the monitoring signals.
In the embodiment of the present invention, it can be a little the end points for being located at a phase line, i.e. circuit usually at transformer station to transmit；
In actual use, transmitting device can be installed transmitting the transformer station computer room near a little, and by the hair of transmitting device
Sending end mouth is communicatively connected to described transmit a little；The control protection device controls the transmitting device.
Step 102：In the electric line institute will be received with a little corresponding predeterminated position that transmits as point of collecting mail
State monitoring signals；
Control protection device with described can transmit a little corresponding predeterminated position in the electric line, setting one or one
Collection of letters point more than individual receives the monitoring signals；
Specifically, control protection device can set collect mail point when preset a criterion distance, i.e., it is described collect mail point with it is described
Transmit distance a little within a preset range.
Further, it will received in the electric line with a little corresponding predeterminated position that transmits as point of collecting mail
Before the monitoring signals, methods described also includes：
The signal of reception is filtered, the power frequency amount and harmonic signal of the electric line is filtered out；The power transmission and distribution
The power frequency amount of circuit is the electric power signal that the electric line needs to convey or dispense in itself, if without filtering out, not only
Meeting interference monitoring signal, can also damage receiving device.
In the embodiment of the present invention, point of collecting mail is a little the same with transmitting, and can be the end points positioned at a phase line, i.e. usually change
Circuit at power station；
In actual use, receiving device, and connecing receiving device can be installed in transformer station's computer room near point of collecting mail
Receiving end mouthful is communicatively connected to the collection of letters point；The control protection device controls the receiving device.
Step 103：Whether the monitoring signals are received according to the point of collecting mail, determines the point of collecting mail with transmitting point
Between circuit on off operating mode.
Specifically, when the point of collecting mail receives the monitoring signals in preset time, control protection device determines described
Point of collecting mail is connected with the circuit between transmitting a little；
When the point of collecting mail does not receive the monitoring signals in preset time, and the point of collecting mail is transmitted with described
Point is transmitted the distance between a little within a preset range positioned at same phase line, collection of letters point with described, is controlled protection device and is determined institute
Circuit between stating collection of letters point and transmitting a little breaks.
For the break-make situation of electric line described in accurate measurements, control protection device can specify that from injection monitoring signals to
The time range of monitoring signals is received, and point and the distance range transmitted a little of collecting mail；
Specifically, regulation, from injection monitoring signals to the time range for receiving monitoring signals, is in order to avoid other letters
Number the delay that causes of interference or special broken string situation because the speed of monitoring signals is all quickly, if monitoring signals are adopted
With electric signal, then speed is similar to the light velocity；If monitoring signals use acoustic signals, speed be also it is very fast, it is remote super empty
The velocity of sound in gas, if can not receive corresponding monitoring signals in the short time, can be considered as and not receive monitoring signals；
Regulation collect mail point and the distance range transmitted a little, allow for either electric signal or sound wave letter
Number, have very big decay in the air, in order to avoid erroneous judgement, it is necessary to provide it is described collect mail point with it is described transmit a little apart from model
Enclose.
More specifically, judging the break-make of electric line, it is necessary to which comprehensive multiple conditions, i.e., described point of collecting mail is in preset time
When inside not receiving the monitoring signals, in addition it is also necessary to which the collection of letters point is a little located at same phase line, the collection of letters with described transmit
Point is transmitted the distance between a little in preset range with described, control protection device could judge it is described collect mail and transmit a little between line
Break on road；
If the point of collecting mail in preset time when receiving the monitoring signals, need not consider same phase line and
Apart from the problem of, it is possible to judge it is described collect mail point connected with the circuit between transmitting a little.
Embodiment two
Fig. 2 is the composition structural representation of electric line of embodiment of the present invention broken string judgement system, as shown in Fig. 2 institute
System is stated including transmitter unit 31, receiver unit 32 and decision package 33 is judged；Wherein,
The transmitter unit 31, for will supervise as transmitting an injection at least the one of an electric line at least phase line
Survey signal；
The receiver unit 32, for receipts will to be used as with a little corresponding predeterminated position that transmits in the electric line
Letter point receives the monitoring signals；
The judgement decision package 33, for whether receiving the monitoring signals according to the point of collecting mail, it is determined that described
The on off operating mode of circuit between the collection of letters is put and transmitted a little.
For becoming apparent from for explanation, modules will be elaborated respectively below：
The transmitter unit 31, for will supervise as transmitting an injection at least the one of an electric line at least phase line
Survey signal；
Here, the monitoring signals are independently of the electric line, therefore will not be by Operation of Electric Systems side
The influence of formula and electric network composition, it is more accurate to monitor；
The electric line can have in multi-phase circuit, the embodiment of the present invention, can be with injection on a phase line wherein
Monitoring signals, only monitor the break-make of a wherein phase line；Different monitoring signals can also be injected separately on each phase line, point
The break-make of each phase line is not monitored.
The monitoring signals can include electric signal and acoustic signals；The electric signal refers to the electricity changed over time
Pressure or electric current, therefore it can be expressed as on mathematical description the function of time, and its waveform can be drawn；The acoustic signals exist
The aerial spread speed of the remote ultrasonic wave of spread speed in solid, usually, spread speed of the acoustic signals in fine copper
Up to 3750 meter per seconds, and the aerial spread speed of acoustic signals is only 340 meter per seconds, it is possible to by transmission and distribution line
Road injects acoustic signals to determine the broken string situation of electric line；
In theory, the monitoring signals of any frequency can serve as the monitoring signals in the embodiment of the present invention, but in order to keep away
From the interference to electric line itself electric energy, control protection device is typically chosen frequency different from the electric line itself electricity
The signal of energy frequency, and the frequency of the signal can not be identical with the frequency for the harmonic wave for endangering the quality of power supply.
Preferably, the frequency of the electric signal can select 300~20000Hz scope, this frequency range, implement letter
Single, propagation distance is also distant；The acoustic signals can be ultrasonic signal, and frequency range preferably can be 20000Hz
~60000Hz；The acoustic signals can be ultrasonic signal, and frequency range preferably can be 20000Hz~60000Hz；
In actual use, electric signal is typically chosen as monitoring signals；Relative to acoustic signals, electric signal is easier reality
Apply, use is more extensive.
Judge that decision package 33 determines that whether the point of collecting mail receives the time of monitoring signals default for the ease of described
The information of the monitoring signals can be notified described by scope, the transmitter unit 31 after electric line injection monitoring signals
Judge decision package 33, the information of the monitoring signals can include the injection length of the monitoring signals.
Further, can be to transmitting a little continual injection monitoring signals in order to recognize disconnection fault in time.
Further, it is described using at least the one of an electric line at least phase line at as transmitting injection monitoring
After signal, the transmitter unit 31 is additionally operable to：
Impedance matching is carried out to the monitoring signals, strengthens the transimission power of the monitoring signals.
The receiver unit 32, for receipts will to be used as with a little corresponding predeterminated position that transmits in the electric line
Letter point receives the monitoring signals；
The receiver unit 32 with described can transmit a little corresponding predeterminated position in the electric line, set one
Individual or more than one point of collecting mail receives the monitoring signals；
Specifically, the receiver unit 32 can preset a criterion distance, i.e., described collection of letters point when setting and collecting mail point
With the distance transmitted a little within a preset range.
Further, it will received in the electric line with a little corresponding predeterminated position that transmits as point of collecting mail
Before the monitoring signals, the receiver unit 32 is additionally operable to：
The signal of reception is filtered, the power frequency amount and harmonic signal of the electric line is filtered out.The power transmission and distribution
The power frequency amount of circuit is the electric power signal that the electric line needs to convey or dispense in itself, if without filtering out, not only
Meeting interference monitoring signal, can also damage the device of the collection of letters.
For the ease of it is described judge decision package 33 know the monitoring signals that the receiver unit is received time whether
Prescribed limit, and whether point of collecting mail is with transmitting the distance between a little in prescribed limit, the receiver unit 32, which receives monitoring, to be believed
After number, reception condition can be notified to the judgement decision package 33.
The judgement decision package 33, for whether receiving the monitoring signals according to the point of collecting mail, it is determined that described
The on off operating mode of circuit between the collection of letters is put and transmitted a little.
Specifically, when it is described collect mail point receive the monitoring signals in preset time when, determine it is described collect mail point with
Circuit connection between transmitting a little；
When the point of collecting mail does not receive the monitoring signals in preset time, and the point of collecting mail is transmitted with described
Point is transmitted the distance between a little within a preset range positioned at same phase line, collection of letters point with described, determines the collection of letters point
Break with the circuit between transmitting a little.
For the break-make situation of electric line described in accurate measurements, it can specify that from injection monitoring signals to receiving prison
The time range of signal is surveyed, and point and the distance range transmitted a little of collecting mail；
Specifically, regulation, from injection monitoring signals to the time range for receiving monitoring signals, is in order to avoid other letters
Number the delay that causes of interference or special broken string situation because the speed of monitoring signals is all quickly, if monitoring signals are adopted
With electric signal, then speed is similar to the light velocity；If monitoring signals use acoustic signals, speed be also it is very fast, it is remote super empty
The velocity of sound in gas, if can not receive corresponding monitoring signals in the short time, can be considered as and not receive monitoring signals；
Regulation collect mail point and the distance range transmitted a little, allow for either electric signal or sound wave letter
Number, have very big decay in the air, in order to avoid erroneous judgement, it is necessary to provide it is described collect mail point with it is described transmit a little apart from model
Enclose.
More specifically, judging the break-make of electric line, it is necessary to which comprehensive multiple conditions, i.e., described point of collecting mail is in preset time
When inside not receiving the monitoring signals, in addition it is also necessary to which the collection of letters point is a little located at same phase line, the collection of letters with described transmit
Point is transmitted the distance between a little within a preset range with described, and the judgement decision package 33 could judge described to collect mail and send out
Circuit between letter point breaks；
If the point of collecting mail in preset time when receiving the monitoring signals, need not consider same phase line and
Apart from the problem of, it is possible to judge it is described collect mail point connected with the circuit between transmitting a little.
In the embodiment of the present invention, the transmitter unit 31, receiver unit 32 and judge that decision package 33 can be by positioned at defeated
Central processing unit (CPU), microprocessor (MPU), digital signal processor (DSP) or the scene of distribution line control protection device can
Program the computings such as gate array (FPGA) and control is realized, can also be realized by transceiver.
Embodiment three
In the embodiment of the present invention, circuit is the transmission line of electricity between Liang Ge transformer stations, the frequency of transmission line of electricity itself electric energy
It is 50Hz for power frequency, i.e. frequency；Monitoring signals are high frequency electrical signal, specifically, and the frequency of monitoring signals is in 3000~20000Hz
Between.
Fig. 3 is the composition structural representation of transmission line of electricity broken string judgement system between the transformer station of the embodiment of the present invention three, such as
Shown in Fig. 3, the transmission line of electricity broken string judgement system includes transmission line of electricity 51, trap 52, coupled capacitor 53, filter joint
54th, high frequency cable 55 and transceiver 56；Wherein,
The transmission line of electricity 51, is the transmission line of electricity between Liang Ge transformer stations, is to need to discriminate whether broken string in use
Circuit, while being also used for transmission of monitoring signal；
The trap 52, for limiting propagation of the monitoring signals outside the transmission line of electricity 51, it is ensured that signal intensity,
Also the interference to other circuits is avoided；The trap can be LC shunt-resonant circuits, and LC shunt-resonant circuits are to high frequency
Monitoring signals can produce very big impedance, and there was only the impedance of very little to the electric energy in the transmission line of electricity 51 of rather low-frequency, will not
Influence the conveying of electric energy in transmission line of electricity 51.
The coupled capacitor 53, for preventing the electric energy of itself of transmission line of electricity 51 from entering transceiver, it is to avoid transceiver
Damage；The coupled capacitor 53 can produce very big impedance to the electric energy in the transmission line of electricity 51 of rather low-frequency, and to high frequency
Monitoring signals there was only the impedance of very little, therefore do not influence the transmission of monitoring signals.
The filter joint 54, the power for strengthening monitoring signals；The filter joint 54 includes filter capacitor
And impedance matching capacitances, the filter capacitor coordinates the coupled capacitor 53, for prevent power frequency amount in transmission line of electricity 51 and
Harmonic signal enters transceiver；The impedance matching capacitances are used for the impedance for matching monitoring signals generation, play impedance matching and make
With the power of enhancing monitoring signals；
Specifically, the transceiver 56 serves when transmitting, and the filter joint 54 is first filtered, impedance matching again；
When the transceiver 56 plays the collection of letters, the first impedance matching of the filter joint 54, filter again；
Further, for security consideration, the filter joint 54 can be grounded by grounding switch.
The high frequency cable 55, the monitoring signals for transmitting high frequency, is part of the prior art, does not repeat；
The transceiver 56, for injecting or receiving monitoring signals, and determines that the transmission line of electricity 51 between transformer station is
It is no to break；
Specifically, when the transceiver 56 of near-end does not receive the monitoring of the injection of remote transceiver 56 in preset time
During signal, determine that the transmission line of electricity 51 between the transceiver 56 of the near-end and remote transceiver 56 breaks；Similarly,
When the transceiver 56 of distal end does not receive the monitoring signals of the injection of near-end transceiver 56 in preset time, it is determined that described
Transmission line of electricity 51 between the transceiver 56 and near-end transceiver 56 of distal end breaks；
The transceiver 56 is hf transceiver, while having the function of transmitting and collect mail, is typically mounted at power transformation
In the computer room stood, high frequency monitoring signals are transmitted by the high frequency cable 55；
Usually, the transceiver 56 is connected with the transmission line of electricity control protection device of transformer station computer room, to transmission line of electricity
Broken string is differentiated.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the protection of the present invention
Within the scope of.
Claims (10)
- The method of discrimination 1. a kind of electric line breaks, it is characterised in that methods described includes：Using at least the one of an electric line at least phase line as transmitting an injection monitoring signals；In the electric line monitoring signals will be received with a little corresponding predeterminated position that transmits as point of collecting mail；Whether the monitoring signals are received according to the point of collecting mail, the break-make of circuit between determining the collection of letters point and transmitting a little State.
- 2. according to the method described in claim 1, it is characterised in that described by least the one of an electric line at least phase line Place, which is used as, transmits an injection monitoring signals, including：Using at least the one of an electric line at least phase line as transmitting an injected frequency different from the electric line The monitoring signals of itself electric energy frequency.
- 3. method according to claim 1 or 2, it is characterised in that by an electric line at least phase line at least As after transmitting injection monitoring signals at one, methods described also includes：Impedance matching is carried out to the monitoring signals, strengthens the transimission power of the monitoring signals.
- 4. method according to claim 1 or 2, it is characterised in that will transmitted a little with described in the electric line Corresponding predeterminated position is received as point of collecting mail before the monitoring signals, and methods described also includes：The signal of reception is filtered, the power frequency amount and harmonic signal of the electric line is filtered out.
- 5. method according to claim 1 or 2, it is characterised in that described according to receiving whether the point of collecting mail Monitoring signals, the on off operating mode of circuit between determining the collection of letters point and transmitting a little, including：When the point of collecting mail receives the monitoring signals in preset time, between determining the collection of letters point and transmitting a little Circuit is connected；When the point of collecting mail does not receive the monitoring signals in preset time, and the point of collecting mail transmits a position with described Transmitted the distance between a little in preset range with described in same phase line, collection of letters point, determine that described collect mail is put with transmitting Circuit between point breaks.
- The judgement system 6. a kind of electric line breaks, it is characterised in that the system includes transmitter unit, receiving device unit With judge decision package；Wherein,The transmitter unit, for using at least the one of an electric line at least phase line as transmitting an injection monitoring letter Number；The receiver unit, for will be connect in the electric line with a little corresponding predeterminated position that transmits as point of collecting mail Receive the monitoring signals；The judgement decision package, for whether receiving the monitoring signals according to the point of collecting mail, determines the collection of letters point With transmit a little between circuit on off operating mode.
- 7. system according to claim 6, it is characterised in that the transmitter unit specifically for：Using at least the one of an electric line at least phase line as transmitting an injected frequency different from the electric line The monitoring signals of itself electric energy frequency, and the information of the monitoring signals is notified into the judgement decision package.
- 8. the system according to claim 6 or 7, it is characterised in that the transmitter unit is additionally operable to：At using at least the one of an electric line at least phase line as after transmitting injection monitoring signals, to the monitoring Signal carries out impedance matching, strengthens the transimission power of the monitoring signals.
- 9. the system according to claim 6 or 7, it is characterised in that the receiver unit specifically for：Receive the monitoring Signal, and reception condition is notified into the judgement decision package；The receiver unit is additionally operable to：In the electric line monitoring signals will be being received with a little corresponding predeterminated position that transmits as point of collecting mail Before, the signal of reception is filtered, filters out the power frequency amount and harmonic signal of the electric line.
- 10. system according to claim 9, it is characterised in that the judgement decision package specifically for：When the point of collecting mail receives the monitoring signals in preset time, between determining the collection of letters point and transmitting a little Circuit is connected；When the point of collecting mail does not receive the monitoring signals in preset time, and the point of collecting mail transmits a position with described Transmitted the distance between a little in preset range with described in same phase line, collection of letters point, determine that described collect mail is put with transmitting Circuit between point breaks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710172745.XA CN107064713A (en) | 2017-03-22 | 2017-03-22 | A kind of electric line broken string method of discrimination and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710172745.XA CN107064713A (en) | 2017-03-22 | 2017-03-22 | A kind of electric line broken string method of discrimination and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107064713A true CN107064713A (en) | 2017-08-18 |
Family
ID=59621199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710172745.XA Pending CN107064713A (en) | 2017-03-22 | 2017-03-22 | A kind of electric line broken string method of discrimination and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107064713A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109905084A (en) * | 2019-03-01 | 2019-06-18 | 华为技术有限公司 | A kind of judgment method of position of failure point, device and photovoltaic system |
| CN110021917A (en) * | 2019-02-11 | 2019-07-16 | 广州京善电子有限公司 | Fault Isolation positioning system |
| CN114006359A (en) * | 2021-11-04 | 2022-02-01 | 全球能源互联网研究院有限公司 | Rapid protection method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202141772U (en) * | 2011-07-01 | 2012-02-08 | 中国海洋石油总公司 | Seismic prospecting cable broken line point detector |
| CN103454546A (en) * | 2013-08-23 | 2013-12-18 | 重庆市宇邦线缆有限公司 | Method and device for detecting cable core breakage and short circuit faults automatically |
| US20150002167A1 (en) * | 2011-08-25 | 2015-01-01 | Pericom Semiconductor Corporation | In-Situ Cable Unplug Detector Operating During Normal Signaling Mode |
| CN204156496U (en) * | 2014-07-29 | 2015-02-11 | 上海微电子装备有限公司 | Cable break-make in a kind of equipment running process detects protective device |
| CN105445610A (en) * | 2016-01-06 | 2016-03-30 | 武汉天降科技有限公司 | Power-off and circuit-break processing device |
| CN205427090U (en) * | 2015-12-10 | 2016-08-03 | 北京铁路信号有限公司 | Portable communications cable break -make testing arrangement |
-
2017
- 2017-03-22 CN CN201710172745.XA patent/CN107064713A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202141772U (en) * | 2011-07-01 | 2012-02-08 | 中国海洋石油总公司 | Seismic prospecting cable broken line point detector |
| US20150002167A1 (en) * | 2011-08-25 | 2015-01-01 | Pericom Semiconductor Corporation | In-Situ Cable Unplug Detector Operating During Normal Signaling Mode |
| CN103454546A (en) * | 2013-08-23 | 2013-12-18 | 重庆市宇邦线缆有限公司 | Method and device for detecting cable core breakage and short circuit faults automatically |
| CN204156496U (en) * | 2014-07-29 | 2015-02-11 | 上海微电子装备有限公司 | Cable break-make in a kind of equipment running process detects protective device |
| CN205427090U (en) * | 2015-12-10 | 2016-08-03 | 北京铁路信号有限公司 | Portable communications cable break -make testing arrangement |
| CN105445610A (en) * | 2016-01-06 | 2016-03-30 | 武汉天降科技有限公司 | Power-off and circuit-break processing device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021917A (en) * | 2019-02-11 | 2019-07-16 | 广州京善电子有限公司 | Fault Isolation positioning system |
| CN109905084A (en) * | 2019-03-01 | 2019-06-18 | 华为技术有限公司 | A kind of judgment method of position of failure point, device and photovoltaic system |
| CN109905084B (en) * | 2019-03-01 | 2021-10-15 | 华为技术有限公司 | Method and device for judging position of fault point and photovoltaic system |
| US11632077B2 (en) | 2019-03-01 | 2023-04-18 | Huawei Digital Power Technologies Co., Ltd. | Fault point position determining method and apparatus and photovoltaic system |
| CN114006359A (en) * | 2021-11-04 | 2022-02-01 | 全球能源互联网研究院有限公司 | Rapid protection method and system |
| CN114006359B (en) * | 2021-11-04 | 2024-01-16 | 全球能源互联网研究院有限公司 | Rapid protection method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107069678B (en) | A kind of electric line thread-breakage protecting and system | |
| CN106249104B (en) | A kind of detection device and method of communication cable shielding layer status monitoring | |
| CN107918079B (en) | Power distribution network single-phase earth fault positioning method and system based on sweep frequency injection | |
| US6906526B2 (en) | Non-intrusive cable connection monitoring for use in HFC networks | |
| CN108072806A (en) | Track circuit fault diagnosis system and method | |
| CN107064713A (en) | A kind of electric line broken string method of discrimination and system | |
| CN106932682A (en) | A kind of earth-return circuit detection method of voltage whole station one point earth | |
| CN201673234U (en) | Distribution line single-phase earth fault inspection device | |
| CN107947370A (en) | A kind of power line topological relation determines method and device | |
| MXPA00010608A (en) | Method and device for monitoring an electrode line of a bipolar high voltage direct current (hvdc) transmission system. | |
| CN210800732U (en) | Water supply network leakage detection equipment and system | |
| CN103969556A (en) | Insulation electrified detection device for cable accessories | |
| CN109001593A (en) | A kind of distribution network failure recording control method | |
| CN107404335B (en) | Method for guaranteeing power line communication in fault and maintenance states of power line | |
| CN108536070A (en) | A kind of shelf depreciation and temperature detection integral intelligent instrument | |
| CN104468498A (en) | Power grid data transmission isolating device and method | |
| CN107561417A (en) | A kind of distributed partial discharge detecting system | |
| CN208297613U (en) | Grounding measurement device and grounding wire detection system | |
| CN103941160B (en) | Power distribution network loop closing detection device and method | |
| CN109142983B (en) | High-frequency injection signal frequency selection method and device based on line parameter errors | |
| CN204925279U (en) | Steal electric detection means | |
| WO2023221432A1 (en) | Fault finding system and method for three-phase circuit | |
| CN103884964A (en) | Travelling wave fault location method based on IEC61850 communication protocol | |
| CN107167663A (en) | A kind of measurement in a closed series circuit and measuring method for being used to suppress line-frequency induction voltage | |
| CN105425124A (en) | On-line monitoring system for partial discharging of transformer and monitoring method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170818 |
|
| RJ01 | Rejection of invention patent application after publication |