CN107064716A - A kind of power transmission line break monitoring system and method - Google Patents
A kind of power transmission line break monitoring system and method Download PDFInfo
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- CN107064716A CN107064716A CN201710312228.8A CN201710312228A CN107064716A CN 107064716 A CN107064716 A CN 107064716A CN 201710312228 A CN201710312228 A CN 201710312228A CN 107064716 A CN107064716 A CN 107064716A
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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
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Abstract
Include transmission line of electricity the invention discloses a kind of power transmission line break monitoring system of the present invention, in addition to：Tail end is monitored, being arranged at transmission line of electricity tail end is used to produce even-order harmonic；Monitoring terminal, being arranged at transmission line of electricity front end is used to monitor the current conditions on transmission line of electricity, detects whether there is even-order harmonic, is not detected by even-order harmonic and then sends line broken circuit signal.Because the system of three balances can not possibly produce even-order harmonic in itself, then the even-order harmonic detected is necessarily applied by monitoring tail end, so, if being not detected by even-order harmonic, show that open circuit occurs in transmission line of electricity, even-order harmonic is lost.And the impossible spontaneous generation even-order harmonic of damaged power transmission line, then influence of the interference electric current to monitoring result of damaged circuit is avoided, the open circuit conditions of power transmission line can be more accurately monitored.
Description
Technical field
The present invention relates to a kind of pressure line monitoring device and method, more particularly to a kind of power transmission line break monitoring system and side
Method.
Background technology
Electric energy has highly important effect as a kind of energy, and it is mainly transported to each electricity consumption by transmission line of electricity
Area, these transmission lines of electricity are crisscross, are dispersed throughout each corner in city and rural area, deliver the power to the ground of each needs
Side.This these transmission line of electricity is often destroyed, such as：It is artificial to steal damage etc. of cutting and construct.The power transmission line of damage can not continue
Power supply, the life given people, production all bring extreme influence, setting to cause huge economic losses.In order to solve this problem, mesh
Preceding that usually transmission line of electricity is monitored using monitoring alarm, this monitoring is by applying biased electrical on transmission line of electricity
Stream, circuit is confirmed by monitoring the current conditions of transmission line of electricity with the presence or absence of open circuit, when circuit disconnects, its bias current disappears
Lose, current detection circuit can't detect electric current and then can determine whether line broken circuit.
But, existing monitoring device is inaccurate, main reason is that, although circuit is damaged, and damaged power transmission line is same
Sample can produce bias current, and the bias current that this kind is produced by power transmission line itself is detected by current detection circuit, can be mistakenly considered
This electric current is the bias current applied on circuit, thus judges that circuit is normal, so as to produce this false judgment.Due to current prison
Survey device and be unable to accurate measurements line broken circuit situation, when here causing many, transmission line of electricity is already breaking, but monitoring device
Do not alarm, perform practically no function, it is impossible to monitor line conditions, timely feedback information is repaired, and can still cause a large amount of electric energy
Loss.In this regard, to solve this problem, then need to provide a kind of more accurately and reliably power transmission line break monitoring system.
The content of the invention
In order to solve the above-mentioned technical problem, present invention aims at a kind of power transmission line break monitoring system and method for offer,
The problem of current power transmission line monitoring device is unable to accurate measurements line broken circuit situation is solved, power transmission line is further solved and is not passing
Monitoring problem during power of transmitting electricity.
A kind of power transmission line break monitoring system of the present invention, including transmission line of electricity, in addition to：
Tail end is monitored, being arranged at transmission line of electricity tail end is used to produce even-order harmonic；
Monitoring terminal, being arranged at transmission line of electricity front end is used to monitor the current conditions on transmission line of electricity, detects whether there is even
Harmonic wave, is not detected by even-order harmonic and then sends line broken circuit signal.
A kind of power transmission line break monitoring system of the present invention, by setting monitoring terminal and monitoring tail end to power transmission line
Road carries out break monitoring.The systems that usual power transmission uses three balances, due to symmetric relation, even-order harmonic by
Eliminate, only odd harmonic is present.Based on this feature, the present invention monitors tail end to produce even-order harmonic by setting, its
The even-order harmonic of generation is together transmitted by transmission line of electricity and the electric power that need to transmit, and monitoring terminal is monitored defeated using current transformer
The electric current of electric line, and row is analyzed to come in, whether monitoring wherein includes even-order harmonic.Due to three balances systems in itself not
There may be even-order harmonic, then the even-order harmonic detected is necessarily occurred by monitoring tail end, so can determine whether that transmission line of electricity is intact,
Do not occur breakage；If being not detected by even-order harmonic, show that open circuit occurs in transmission line of electricity, even-order harmonic is lost.This kind is monitored
System, being in transmission line of electricity has electricity condition（The state transmitted electric power）When, do not characterize line condition with line current, and with
Even-order harmonic comes whether characterization circuit is breaking, and this monitoring system can accurately detect the damaged and open circuit of power transmission line.Because damaged
Power transmission line there may be bias current, if using bias current as line condition token state, the shadow of electric current can be disturbed
Sound causes monitoring result inaccurate；But the impossible spontaneous generation even-order harmonic of damaged power transmission line, then can not influence such as the present invention
The described monitoring system using even-order harmonic as line condition token state, so this kind of power transmission line break monitoring system is avoided brokenly
Influence of the interference electric current of circuit to monitoring result is damaged, the open circuit conditions of power transmission line can be more accurately monitored.
Further, a kind of power transmission line break monitoring system of the present invention, it is characterised in that the monitoring terminal is also wrapped
Include without electric breaking detection module, monitoring tail end also includes without electric afterflow module；Without electric breaking detection module, central processing unit is received
Instruction, the transmission line of electricity of power transmission is powered, detect transmission line of electricity electric current, transmission have current information or no current information extremely
Central processing unit；Confirm transmission line status, transmission line of electricity, which is in electroless state and then sends non-electric detection, to be instructed to without electric open circuit
Detection module, receives the no current information without electric breaking detection module feedback and then sends line broken circuit information；Without electric afterflow mould
Block, coordinates in monitoring terminal and produces electric current on the transmission line of electricity transmitted in unregulated power.
When transmission line of electricity is in electroless state, even-order harmonic can not be transmitted in transmission line of electricity again, current transformer also without
Method monitors the current conditions of transmission line of electricity, in such cases, it is impossible to line conditions are judged by monitoring even-order harmonic, but online
Road can be also damaged when being in electroless state, if do not solved this problem, then line when causing transmission line of electricity in electroless state
Road situation can not be monitored, and now circuit is destroyed can not then find in time.In this regard, the present invention provides a kind of more excellent power transmission line
Break monitoring system, further solves and is in electroless state in power transmission line（The state not transmitted electric power）When monitoring ask
Topic.When transmission line of electricity is in electroless state, monitoring terminal switches to no pyroelectric monitor state, and transmission line of electricity is powered and is formed with prison
The loop that terminal, transmission line of electricity and monitoring tail end are constituted is surveyed, monitoring terminal monitors the electric current in this loop, illustrated if no current
Loop open circuit.This kind monitoring compensate for even-order harmonic monitoring and be unsuitable for situation of the transmission line of electricity without electricity, perfect whole monitoring system
System, it is real to provide a kind of accurately and reliably power transmission line break monitoring system.
A kind of power transmission line break monitoring method of the present invention, comprises the following steps：
S1, confirms current transmission line status, in there is electricity condition then to enter step S2, then enters step in electroless state
S3；
S2, monitoring tail end produces even-order harmonic and with Transmission Lines, and monitoring terminal detects whether deposited in transmission line of electricity electric current
In even-order harmonic, continue to monitor if existing, as entered step S4 in the absence of if；
S3, monitoring terminal switches to electroless state, is powered for the transmission line of electricity in electroless state, and whether detection transmission line of electricity is deposited
In electric current, if there is then continuing to monitor, as entered step S4 in the absence of if；
S4, monitoring terminal judges transmission line of electricity open circuit according to the information of monitoring, sends line broken circuit information.
A kind of power transmission line break monitoring method of the present invention, by applying electricity on transmission line of electricity
Stream or even-order harmonic carry out break monitoring.The system that usual power transmission uses three balances, it is even due to symmetric relation
Subharmonic has been eliminated, and only odd harmonic is present.Based on this feature, the present invention is even by applying on transmission line of electricity
Subharmonic, the even-order harmonic is together transmitted by transmission line of electricity and the electric power that need to transmit, then monitors the electric current of transmission line of electricity, and
To come in, row is analyzed, and whether monitoring wherein includes even-order harmonic.Due to the systems of three balances, can not possibly to produce even in itself humorous
Ripple, the then even-order harmonic detected is necessarily applied by monitoring tail end, so can determine whether that transmission line of electricity is intact, does not occur breakage；Such as
Fruit is not detected by even-order harmonic, then shows that open circuit occurs in transmission line of electricity, even-order harmonic is lost.This kind of monitoring method, in power transmission line
Road, which is in, electricity condition（The state transmitted electric power）When, line condition is not characterized with line current, and table is come with even-order harmonic
Whether breaking levy circuit, this monitoring method can accurately detect the damaged and open circuit of power transmission line.Because damaged power transmission line may
Interference electric current is produced, if using current value as line condition token state, can be disturbed the influence of electric current causes monitoring result
It is inaccurate；But the impossible spontaneous generation even-order harmonic of damaged power transmission line, then can not influence humorous with even as described in the present invention
Ripple is the monitoring method of line condition token state, so this kind of power transmission line break monitoring method avoids the interference electricity of damaged circuit
The influence to monitoring result is flowed, the open circuit conditions of power transmission line can be more accurately monitored.A kind of power transmission line break of the present invention
Monitoring method, further solves and is in electroless state in power transmission line（The state not transmitted electric power）When monitoring problem.
When transmission line of electricity is in electroless state, monitoring terminal switches to no pyroelectric monitor state, and transmission line of electricity is powered and is formed with monitoring
The loop that terminal, transmission line of electricity and monitoring tail end are constituted, monitoring terminal monitors the electric current in this loop, illustrated back if no current
Road open circuit.This kind monitoring compensate for even-order harmonic monitoring and be unsuitable for situation of the transmission line of electricity without electricity, perfect whole monitoring method,
It is real to provide a kind of accurately and reliably power transmission line break monitoring method.
Brief description of the drawings
Fig. 1 is a kind of system block diagram 1 of power transmission line break monitoring system of the present invention.
Fig. 2 is a kind of system block diagram 2 of power transmission line break monitoring system of the present invention.
Embodiment
As shown in figure 1, a kind of power transmission line break monitoring system of the present invention, including transmission line of electricity, in addition to：Monitoring
Tail end, being arranged at transmission line of electricity tail end is used to produce even-order harmonic；Monitoring terminal, is arranged at transmission line of electricity front end defeated for monitoring
Current conditions in electric line, detect whether there is even-order harmonic, are not detected by even-order harmonic and then send line broken circuit signal.By
Even-order harmonic can not possibly be produced in itself in the system of three balances, then the even-order harmonic detected is necessarily applied by monitoring tail end,
So can determine whether that transmission line of electricity is intact, do not occur breakage；If being not detected by even-order harmonic, show that transmission line of electricity breaks
Road, even-order harmonic is lost.
As shown in figure 1, for even-order harmonic module can occur for the monitoring tail end, even-order harmonic is produced, and it is humorous to send even
Ripple to transmission line of electricity is transmitted because the system of three balances can not possibly produce even-order harmonic in itself, so even herein is humorous
Ripple occurs module and is not required for occurring higher hamonic wave, produces second harmonic, so even-order harmonic occurs module and can have one or two
Pole pipe and resistance composition, due to the one-way conduction characteristic of diode, therefore it can not guide pin bushing, its production in specific half period
Therefore raw harmonic period changes, you can produce second harmonic.
As shown in figure 1, the monitoring terminal includes, current transformer is arranged with transmission line of electricity, monitoring transmission line of electricity
Current conditions, the current signal monitored is sent to harmonic detecting module；There is electric harmonic detecting module, receive current signal
And detect whether there is even-order harmonic, analysis result is sent to central processing unit；Central processing unit, confirms transmission line of electricity shape
State, transmission line of electricity is in the feedback information for having electricity condition then to receive electric harmonic detecting module, receives non-even-order harmonic information
Then send line broken circuit information.Monitoring terminal judges whether circuit goes out by monitoring transmission line of electricity electric current with the presence or absence of even-order harmonic
Show open circuit, if detecting the presence of even-order harmonic, because transmission line of electricity can not spontaneous generation even-order harmonic, this even-order harmonic
The monitoring tail end set from transmission line of electricity tail end occurs, even-order harmonic normal transmission, then circuit does not occur open circuit；If do not detected
To even-order harmonic, then show that even-order harmonic is lost in transmission line of electricity, open circuit occurs in transmission line of electricity.
, then can not be by detecting whether even-order harmonic deposits because when circuit is in electroless state, even-order harmonic can not be transmitted
It whether there is open circuit to monitor transmission line of electricity, it is therefore, this only to will be unable to be applicable with the monitoring system of line condition token state
In power transmission line electroless state.In this regard, monitoring terminal of the present invention is also included without electric breaking detection module, monitoring tail end also includes
Without electric afterflow module.As shown in figure 1, without electric breaking detection module, receiving the instruction of central processing unit, the transmission of electricity to power transmission
Line powering, detects transmission line of electricity electric current, and transmission has current information or no current information to central processing unit；Confirm transmission line of electricity
State, transmission line of electricity, which is in electroless state and then sends non-electric detection, to be instructed to without electric breaking detection module, receiving without electric open circuit
The no current information of detection module feedback then sends line broken circuit information；Without electric afterflow module, coordinate in monitoring terminal without electricity
Electric current is produced on the transmission line of electricity of power transmission.Monitoring terminal is by being provided with electric harmonic detecting module and without electric breaking detection module
Supply lines can be in has electricity condition and electroless state to be monitored respectively.Supply lines, which is in, has electricity condition then to monitor transmission line of electricity
Electric current whether there is even-order harmonic, and transmission line of electricity is in electroless state, then monitor transmission line of electricity and whether there is electric current, if transmission of electricity
Circuit, which is in, electricity condition, but is not detected by even-order harmonic, then shows that open circuit occurs in transmission line of electricity, even-order harmonic is lost；If
Transmission line of electricity is in electroless state, but monitoring terminal is not detected by the loop of monitoring terminal, transmission line of electricity and monitoring tail end composition
Interior electric current, then show that open circuit occurs in transmission line of electricity, cause loop open circuit.Accordingly, this kind of monitoring system both can be in power transmission line
Road is in have and used under electricity condition, can also be used in the case where transmission line of electricity is in electroless state, complete accurate accurately monitoring circuit
Open circuit conditions.
As shown in Fig. 2 described include without electric breaking detection module, line powering module receives the instruction of central processing unit
Transmission line of electricity in electroless state is powered；Circuit switch module, no breaking detection module of electricity switches to electroless state, connects
Without electric terminals current detection module and line powering module；Without electric terminals current detection module, pass through circuit switch module and line
Road power supply module, transmission line of electricity and detection tail end system constitute loop, monitor line current, and transmission has current information or no current
Information is to central processing unit.When transmission line of electricity is in electroless state, monitoring tail end can not produce even-order harmonic, now, circuit
Handover module switches line status value electroless state, and line powering module is powered to transmission line of electricity, no electric terminals current detecting mould
Electric current in block monitoring transmission line of electricity, illustrates loop open circuit if no current.
The monitoring terminal also includes alarm module, receives the line broken circuit information that central processing unit is sent, and produces alarm
Signal.The alarm module can be alarmed using modes such as caution bell or flashing lights, it is intended to cause personnel in attention, to handle line in time
Road problem.Buzzer warning mode can be used in the embodiment, i.e., described alarm module includes, drive circuit and buzzer drive
Dynamic circuit receives the order-driven buzzer warning of central processing unit, and when central processing unit confirms that line broken circuit is, buzzer is sent out
Go out buzzer to alarm.
As shown in Fig. 2 the monitoring terminal also include communication module, the communication module include GSM communication modules and
RS485 communication modules, realize the communication of monitoring terminal and other external units.The monitoring terminal can other external devices, pass through
Communication module is set, it is possible to resolve the problem of the communication differences of distinct device, expands the scope of application of the system.
As shown in Fig. 2 the monitoring terminal also includes power supply processing module, the power supply processing module includes lightning-protection module
And rectification filtering module, by conventional civil power be converted to monitoring terminal can electricity consumption.It is practical for convenience, by setting power supply to handle
Module can realize and the system is powered using civil power, so, setting power supply processing module to include rectification filtering module can be by
220V electric main is powered after changing into monitoring terminal.Meanwhile, in order to ensure equipment safety, the power supply processing module is also set up
Lightning-protection module, water conservancy diversion is carried out to thunder and lightning, it is to avoid influence equipment is used.
A kind of power transmission line break monitoring method, it is characterised in that comprise the following steps：S1, confirms current transmission line of electricity shape
State, in there is electricity condition then to enter step S2, then enters step S3 in electroless state；S2, monitoring tail end produces even-order harmonic
And with Transmission Lines, monitoring terminal, which is detected, whether there is even-order harmonic in transmission line of electricity electric current, continue to monitor if existing,
As entered step S4 in the absence of if；S3, monitoring terminal switches to electroless state, is powered for the transmission line of electricity in electroless state,
Detect that transmission line of electricity whether there is electric current, if there is then continuing to monitor, as entered step S4 in the absence of if；S4, monitoring terminal
Transmission line of electricity open circuit is judged according to the information of monitoring, line broken circuit information is sent.This kind of monitoring method first confirms that line status,
Being according to circuit has electricity condition or electroless state, performs different monitoring steps, transmission line of electricity, which is in, has electricity condition then to defeated
Electric line applies in even-order harmonic, monitoring transmission line of electricity electric current judges whether that line broken circuit is asked with the presence or absence of even-order harmonic
Topic；Transmission line of electricity is in electroless state, then is that whether there is electric current in line powering, monitoring transmission line of electricity by monitoring terminal
Judge no there are problems that line broken circuit.
The power transmission line break monitoring method, in addition to step S5, alarm signal is sent according to the alarm module of monitoring terminal
Number, the alarming step is intended to cause personnel in attention, so as to timely process circuit problem.
For those skilled in the art, technical scheme that can be as described above and design, make other each
It is kind corresponding to change and deform, and all these change and deformation should all belong to the protection model of the claims in the present invention
Within enclosing.
Claims (10)
1. a kind of power transmission line break monitoring system, including transmission line of electricity, it is characterised in that also include：
Tail end is monitored, being arranged at transmission line of electricity tail end is used to produce even-order harmonic；
Monitoring terminal, being arranged at transmission line of electricity front end is used to monitor the current conditions on transmission line of electricity, detects whether there is even
Harmonic wave, is not detected by even-order harmonic and then sends line broken circuit signal.
2. a kind of power transmission line break monitoring system according to claim 1, it is characterised in that the monitoring terminal includes,
Current transformer, is sheathed on transmission line of electricity, monitors the current conditions of transmission line of electricity, by the current signal monitored, hair
Deliver to harmonic detecting module；
There is electric harmonic detecting module, receive current signal and detect whether there is even-order harmonic, analysis result is sent to center
Processor；
Central processing unit, confirms transmission line status, transmission line of electricity, which is in, has electricity condition then to receive electric harmonic detecting module
Feedback information, receives non-even-order harmonic information and then sends line broken circuit information.
3. a kind of power transmission line break monitoring system according to claim 2, it is characterised in that the monitoring terminal also includes
Without electric breaking detection module, monitoring tail end also includes without electric afterflow module；Without electric breaking detection module, central processing unit is received
Instruction, powers to the transmission line of electricity of power transmission, detects transmission line of electricity electric current, and transmission has current information or no current information into
Central processor；Confirm transmission line status, transmission line of electricity, which is in electroless state and then sends non-electric detection, to be instructed to without electric open circuit inspection
Module is surveyed, the no current information without electric breaking detection module feedback is received and then sends line broken circuit information；Without electric afterflow module,
Coordinate in monitoring terminal and produce electric current on the transmission line of electricity transmitted in unregulated power.
4. a kind of power transmission line break monitoring system according to claim 3, it is characterised in that described without electric open circuit detection mould
Block includes,
Line powering module, the instruction for receiving central processing unit is powered to the transmission line of electricity in electroless state；
Circuit switch module, no breaking detection module of electricity switches to electroless state, connects without electric terminals current detection module and line
Road power supply module；
Without electric terminals current detection module, pass through circuit switch module and line powering module, transmission line of electricity and detection tail end system
System constitutes loop, monitors line current, and transmission has current information or no current information to central processing unit.
5. a kind of power transmission line break monitoring system according to claim any one of 1-4, it is characterised in that the monitoring is whole
End also includes alarm module, receives the line broken circuit information that central processing unit is sent, and produces alarm signal.
6. a kind of power transmission line break monitoring system according to claim 5, it is characterised in that the alarm module includes,
Drive circuit and buzzer, drive circuit receive the order-driven buzzer warning of central processing unit.
7. a kind of power transmission line break monitoring system according to claim any one of 1-4, it is characterised in that the monitoring is whole
End also includes communication module, and the communication module includes GSM communication modules and RS485 communication modules, realizes monitoring terminal and its
The communication of his external unit.
8. a kind of power transmission line break monitoring system according to claim any one of 1-4, it is characterised in that the monitoring is whole
End also includes power supply processing module, and the power supply processing module includes lightning-protection module and rectification filtering module, and conventional civil power is turned
Be changed to monitoring terminal can electricity consumption.
9. a kind of power transmission line break monitoring method, it is characterised in that comprise the following steps：
S1, confirms current transmission line status, in there is electricity condition then to enter step S2, then enters step in electroless state
S3；
S2, monitoring tail end produces even-order harmonic and with Transmission Lines, and monitoring terminal detects whether deposited in transmission line of electricity electric current
In even-order harmonic, continue to monitor if existing, as entered step S4 in the absence of if；
S3, monitoring terminal switches to electroless state, is powered for the transmission line of electricity in electroless state, and whether detection transmission line of electricity is deposited
In electric current, if there is then continuing to monitor, as entered step S4 in the absence of if；
S4, monitoring terminal judges transmission line of electricity open circuit according to the information of monitoring, sends line broken circuit information.
10. a kind of power transmission line break monitoring method according to claim 9, it is characterised in that also including step S5, according to
The alarm module of monitoring terminal sends alarm signal.
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Cited By (1)
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| CN109696606A (en) * | 2018-12-11 | 2019-04-30 | 安徽灿邦电气有限公司 | A kind of header box integrated testing platform |
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