A kind of supply lines break monitoring system and method
Technical field
The present invention relates to a kind of pressure line monitoring device and method, more particularly to a kind of supply lines 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 supply line
Area, these supply lines are crisscross, are dispersed throughout each corner in city and rural area, deliver the power to the ground of each needs
Side.This these supply line is often destroyed, such as:It is artificial to steal damage etc. of cutting and construct.The supply lines 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 supply line is monitored using monitoring alarm, this monitoring is by applying biased electrical in supply line
Stream, circuit is confirmed by monitoring the current conditions of supply line 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, supply line 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 supply lines break monitoring system.
The content of the invention
In order to solve the above-mentioned technical problem, present invention aims at a kind of supply lines break monitoring system and method for offer,
The problem of current supply lines monitoring device is unable to accurate measurements line broken circuit situation is solved, supply lines is further solved and is not passing
Monitoring problem during power of transmitting electricity.
A kind of supply lines break monitoring system of the present invention, including supply line, in addition to:
Tail end is monitored, being arranged at supply line's tail end is used to produce harmonic wave;
Monitoring terminal, being arranged at supply line front end is used to monitor the current conditions in supply line, detect whether there is even
Harmonic wave, is not detected by even-order harmonic and then sends line broken circuit signal.
A kind of supply lines break monitoring system of the present invention, by setting monitoring terminal and monitoring tail end to supply lines
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 is by setting monitoring tail end to produce harmonic wave, due to humorous
Ripple has even-order harmonic and odd harmonic in itself, and the harmonic wave is together transmitted by supply line and the electric power that need to transmit, monitoring
Whether terminal monitors the electric current of supply line using current transformer, and row is analyzed to come in, can monitor wherein humorous comprising even
Ripple.Because the system of three balances can not possibly produce even-order harmonic in itself, then the even-order harmonic detected is inevitable by monitoring tail end
Occur, so can determine whether that supply line is intact, do not occur breakage;If being not detected by even-order harmonic, show that supply line goes out
Existing open circuit, even-order harmonic is lost.This kind of monitoring system, being in supply line has electricity condition(The state transmitted electric power)When, no
Line condition is characterized with line current, and comes whether characterization circuit is breaking with even-order harmonic, this monitoring system can be examined accurately
Survey the damaged and open circuit of supply lines.Because damaged supply lines is there may be bias current, if being used as circuit using bias current
Situation token state, then can be disturbed the influence of electric current causes monitoring result inaccurate;But damaged supply lines can not possibly spontaneous production
Raw even-order harmonic, then can not influence as described in the present invention using even-order harmonic as the monitoring system of line condition token state, so
This kind of supply lines break monitoring system avoids influence of the interference electric current to monitoring result of damaged circuit, can more accurately monitor
The open circuit conditions of supply lines.
Further, a kind of supply lines 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 supply line of power transmission is powered, detection supply line electric current, transmission has current information or no current information extremely
Central processing unit;Confirm supply line state, supply line, 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 in the supply line transmitted in unregulated power.
When supply line is in electroless state, even-order harmonic can not transmission in supply line again, current transformer also without
Method monitors the current conditions of supply line, in such cases, even if monitoring tail end sends the harmonic signal comprising even-order harmonic,
Line conditions can not be judged by monitoring even-order harmonic, but can be also damaged when circuit is in electroless state, if do not solved
This problem, then line conditions when causing the supply line to be in electroless state can not be monitored, now circuit it is destroyed then without
Method is found in time.In this regard, the present invention provides a kind of more excellent supply lines break monitoring system, further solve in power supply
Line is in electroless state(The state not transmitted electric power)When monitoring problem.When supply line is in electroless state, monitoring is eventually
End switches to no pyroelectric monitor state, and supply line is powered to be formed with monitoring terminal, supply line and monitor tail end composition and returned
Road, monitoring terminal monitors the electric current in this loop, and loop open circuit is illustrated if no current.This kind monitoring compensate for even-order harmonic prison
Situation of the supply line without electricity that be unsuitable for is surveyed, perfect whole monitoring system is real to provide a kind of accurately and reliably supply lines
Break monitoring system.
A kind of supply lines break monitoring method of the present invention, comprises the following steps:
S1, confirms current supply line's state, in there is electricity condition then to enter step S2, then enters step in electroless state
S3;
S2, monitoring tail end produces harmonic wave and with power line transmission, and monitoring terminal is detected in supply line's electric current with the presence or absence of even
Subharmonic, continues to monitor, as entered step S4 in the absence of if if existing;
S3, monitoring terminal switches to electroless state, is powered for the supply line in electroless state, and whether detection supply line deposits
In electric current, if there is then continuing to monitor, as entered step S4 in the absence of if;
S4, monitoring terminal judges supply line's open circuit according to the information of monitoring, sends line broken circuit information.
A kind of supply lines break monitoring method of the present invention, by applying electricity in supply line
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 in supply line by applying humorous
Ripple, because the harmonic wave is in itself both comprising even-order harmonic or comprising odd harmonic, therefore the harmonic wave is by supply line and need to transmit
Whether electric power is together transmitted, and then monitors the electric current of supply line, and row is analyzed to come in, can monitor wherein humorous comprising even
Ripple.Because the system of three balances can not possibly produce even-order harmonic in itself, then the even-order harmonic detected is inevitable by monitoring tail end
Apply, so can determine whether that supply line is intact, do not occur breakage;If being not detected by even-order harmonic, show that supply line goes out
Existing open circuit, even-order harmonic is lost.This kind of monitoring method, being in supply line has electricity condition(The state transmitted electric power)When, no
Line condition is characterized with line current, and comes whether characterization circuit is breaking with even-order harmonic, this monitoring method can be examined accurately
Survey the damaged and open circuit of supply lines.Because damaged supply lines is there may be interference electric current, if being used as circuit feelings using current value
Condition token state, then can be disturbed the influence of electric current causes monitoring result inaccurate;But damaged supply lines can not possibly spontaneous generation
Even-order harmonic, then can not influence as described in the present invention using even-order harmonic as the monitoring method of line condition token state, so should
Influence of the interference electric current to monitoring result that supply lines break monitoring method avoids damaged circuit is planted, confession can be more accurately monitored
The open circuit conditions of electric wire.A kind of supply lines break monitoring method of the present invention, is further solved at supply lines
In electroless state(The state not transmitted electric power)When monitoring problem.When supply line is in electroless state, monitoring terminal is cut
No pyroelectric monitor state is changed to, supply line is powered and is formed with the loop that monitoring terminal, supply line and monitoring tail end are constituted, prison
The electric current surveyed in this loop of terminal monitoring, illustrates loop open circuit if no current.This kind monitoring compensate for even-order harmonic monitoring not
Suitable for situation of the supply line without electricity, perfect whole monitoring method is real to provide a kind of accurately and reliably supply lines open circuit
Monitoring method.
Brief description of the drawings
Fig. 1 is a kind of system block diagram 1 of supply lines break monitoring system of the present invention.
Fig. 2 is a kind of system block diagram 2 of supply lines break monitoring system of the present invention.
Embodiment
As shown in figure 1, a kind of supply lines break monitoring system of the present invention, including supply line, in addition to:Monitoring
Tail end, being arranged at supply line's tail end is used to produce harmonic wave;Monitoring terminal, being arranged at supply line front end is used to monitor supply lines
Current conditions on road, detect whether there is even-order harmonic, be not detected by even-order harmonic and then send line broken circuit signal.Due to
The system of three balances can not possibly produce even-order harmonic in itself, then the even-order harmonic detected applies necessarily resulting from monitoring tail end
The even-order harmonic included in harmonic wave, so can determine whether that supply line is intact, does not occur breakage;If being not detected by even-order harmonic,
Then show that open circuit occurs in supply line, even-order harmonic is lost.
As shown in figure 1, the monitoring tail end includes harmonic wave and occurs module, harmonic wave is produced, and send harmonic wave to supply line
It is transmitted.Because the system of three balances can not possibly produce even-order harmonic in itself, so module occurs for harmonic wave herein not
It is required that only occurring even-order harmonic, as long as including even-order harmonic.Include as shown in Fig. 2 module occurs for shown harmonic wave, rectification mould
Block, receives the electric power of power line transmission, is powered after rectification for oscillation module;Oscillation module, receives the power supply of rectification module, shakes
Dissipate one's fortune raw oscillator signal, and oscillator signal is sent to detection module;Detection module, is examined to the oscillator signal received
Ripple, obtains that supply line processed occurs after harmonic wave, there is power line transmission.It is humorous comprising even-order harmonic that module generation occurs for the harmonic wave
Ripple signal.
As shown in figure 1, the monitoring terminal includes, current transformer is arranged with supply line, monitoring supply line
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 supply line's shape
State, supply line 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 supply line's electric current with the presence or absence of even-order harmonic
Show open circuit, if detecting the presence of even-order harmonic, because supply line can not spontaneous generation even-order harmonic, this even-order harmonic
The even-order harmonic included in the harmonic wave for the monitoring tail end generation that confession electric line tail end is set, even-order harmonic normal transmission, then line
Road does not occur open circuit;If being not detected by even-order harmonic, show that even-order harmonic is lost in supply line, supply line occurs
Open circuit.
, 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 supply line, 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 power supply to power transmission
Line powering, detection supply line electric current, transmission has current information or no current information to central processing unit;Confirm supply line
State, supply line, 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 in the supply line of power transmission.In this way, monitoring terminal is by being provided with electric harmonic detecting module and being examined without electric open circuit
Surveying module and 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 confession
Electric line electric current whether there is even-order harmonic, and supply line is in electroless state, then monitor supply line and whether there is electric current, such as
Fruit supply line, which is in, electricity condition, but is not detected by even-order harmonic, then shows that open circuit occurs in supply line, even-order harmonic is lost
Lose;If supply line is in electroless state, but monitoring terminal is not detected by monitoring terminal, supply line and monitoring tail end composition
Loop in electric current, then show supply line occur open circuit, cause loop open circuit.
As shown in Fig. 2 described include without electric breaking detection module, line powering module receives the instruction of central processing unit
Supply line 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, supply line 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 supply line 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 supply line, no electric terminals current detecting mould
Electric current in block monitoring supply line, 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 supply lines break monitoring method, it is characterised in that comprise the following steps:S1, confirms current supply line's shape
State, in there is electricity condition then to enter step S2, then enters step S3 in electroless state;S2, monitoring tail end produce harmonic wave and with
It whether there is even-order harmonic in power line transmission, monitoring terminal detection supply line electric current, continue to monitor if existing, if not
In the presence of then into step S4;S3, monitoring terminal switches to electroless state, is powered for the supply line in electroless state, detection
Supply line whether there is electric current, if there is then continuing to monitor, as entered step S4 in the absence of if;S4, monitoring terminal according to
The information of monitoring judges supply line's open circuit, sends line broken circuit information.This kind of monitoring method first confirms that line status, according to
Circuit, which is in, electricity condition or electroless state, performs different monitoring steps, supply line, which is in, has electricity condition then to supply lines
Road applies harmonic wave, because the system comprising three balances in harmonic wave can not possibly produce even-order harmonic in itself, then monitors supply line
In electric current line broken circuit problem is judged whether with the presence or absence of even-order harmonic;Supply line is in electroless state, then passes through
Monitoring terminal is line powering, whether there is electric current in monitoring supply line to judge no to there are problems that line broken circuit.
The supply lines 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.