CN109239561A - Slave, host and detector for split type fault electric arc detector - Google Patents
Slave, host and detector for split type fault electric arc detector Download PDFInfo
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- CN109239561A CN109239561A CN201811442007.3A CN201811442007A CN109239561A CN 109239561 A CN109239561 A CN 109239561A CN 201811442007 A CN201811442007 A CN 201811442007A CN 109239561 A CN109239561 A CN 109239561A
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
The invention discloses a kind of slave, host and detector for split type fault electric arc detector, which includes host and one or more slaves connected to it；The slave is set on the route to be protected between breaker and load, for detecting with the presence or absence of fault electric arc on the route to be protected, and fault electric arc testing result is transferred to host in the form of digital signal；The host is connect with the breaker on route to be protected, according to the fault electric arc testing result received, is handled fault electric arc.The present invention uses split type master-slave machine structure, and is communicated between the two by digital signal, and the problem more than conventional failure arc detector occupancy guideway space is not only solved；And it can guarantee the data processing speed of host；In addition, when installation slave, it is not necessary to which open-circuit line reduces contact, reduces a possibility that fault electric arc occurs.
Description
Technical field
The present invention relates to fault electric arc detection techniques, in particular to a kind of detect for split type fault electric arc
Slave, host and the detector of device.
Background technique
Currently, fault electric arc is one of main inducing of electrical fire, prison of the fault electric arc detector as electrical fire
Equipment is controlled, can effectively reduce the electrical fire occurrence probability in monitored area, therefore, the installation number of fault electric arc detector is increasingly
Increase, has become civil commercial power indispensable a part safely.
Traditional fault electric arc detector is generally mounted on the guide rail in most end grade distribution box, be placed in breaker protector or
The rear end of earth leakage protective device, specific connection structure is as shown in Figure 1, fault electric arc detector 1 is installed in the guide rail in distribution box
On, it is connected on the route to be protected between breaker and load.With the type of electrical equipment and increasing for quantity, to avoid
Damage of the fault electric arc to electrical equipment need to use the route of fault electric arc detector to be also increasing, and corresponding distribution box is led
It needs the quantity of the fault electric arc detector of installation also to increase therewith on rail, leads to the saturation beyond original distribution box, thus
Have to additionally increase dedicated for install fault electric arc detector distribution box, this not only will increase arc detector itself and
The maintenance difficulties of other electrical equipments, also will increase maintenance cost, therefore, client's acceptance is lower in distribution box.Meanwhile it passing
The fault electric arc detector of system is free-standing product, checks system, bus system, sound-light alarm etc. four by power-supply system, electric arc
A part composition, single cost is relatively high, and with being increasing in a distribution box installation number, totle drilling cost increases therewith,
It is one of the reason for causing client's acceptance low.
In addition, in conjunction with Fig. 1 it is found that traditional fault detector is during installation, need original breaker and negative
Route between load disconnects, and fault electric arc detector is connect among load with breaker, such mounting means, will increase more
More contacts increases more security risks from a safety viewpoint.
In the prior art, Authorization Notice No.: CN207866965U, title: a kind of split type fault electric arc detection system
In patent, following technology contents are disclosed: split type fault electric arc detection system, including control unit, alarm unit and multiple
Split type arc detection unit, and multiple split type arc detection units are set in the same fault electric arc detector,
Realize the technical effect for carrying out arc-detection to multi-path line simultaneously using a control unit.The split type fault electric arc is visited
In examining system, the structure of " multiple arc detection units correspond to multiple control units " is improved are as follows: " multiple arc detection units pair
A control unit should be connected ", this improvement can reduce the occupied space of fault electric arc detector to a certain extent, but with
Increasing for route to be protected, the structure easily there arises a problem that
1, it is connect due to control unit with multiple arc detection units, back panel wiring is more, therefore its installation and maintenance have
Certain difficulty, and when number of, lines to be protected is more, the quantity of arc detection unit can not no maximum increasing in the system
Add, for the quantity for adapting to route to be protected, therefore the quantity for being necessarily required to increase fault electric arc detection system is difficult to from root
Space hold is solved the problems, such as in sheet；
2, since control unit needs to respond and handle the detection signal of multiple arc detection units, operand is larger,
Therefore, response and processing speed can decrease, while also will affect the accuracy rate that system judges fault electric arc, cause to prolong
Accidentally even miss best arc extinguishing opportunity；
3, signal transmission is carried out using analog signal, to guarantee that data transmit timeliness and quality, signal transmission distance compared with
It is short, thus it is not suitable for remotely monitoring.
Based on this, above-mentioned publication can be alleviated to a certain extent since route to be protected increases bring on a small quantity
The problem of space hold and increased costs, but with the extensive use of electrical equipment, number of, lines to be protected is increased sharply, can neither
It fundamentally solves the problems, such as space hold existing in the prior art, cannot guarantee that the response speed to fault electric arc judgement
And accuracy rate, it can't solve to lead to contact in route to be protected because open circuit accesses fault detector between load and breaker
The problem of increasing, and due to the display of analog signal transmission mode, it is difficult to treat protection circuit progress remote monitor.
In view of this, above-mentioned technical problem is urgently to be resolved.
Summary of the invention
The slave that in order to solve the above-mentioned technical problems, the present invention provides a kind of for split type fault electric arc detector,
Host and detector, the present invention uses split type master-slave machine structure, and is communicated between the two by digital signal, no
Address only the problem more than conventional failure arc detector occupancy guideway space；And it can guarantee the data processing speed of host；This
Outside, when slave is installed, it is only necessary to the firewire on the route to be protected be made to pass through slave, it is not necessary to open-circuit line, relative to existing
Technology reduces contact, reduces a possibility that fault electric arc occurs.
To achieve the goals above, one aspect of the present invention provides a kind of for split type fault electric arc detector
Slave, the slave be set in breaker and load between route to be protected on, including slave shell and be located at the slave shell
Interior arc detection unit and the first communication unit,
The arc detection unit, for electric arc type to be detected and judged, and by the detection knot to fault electric arc
Fruit is converted to digital signal；
First communication unit, connect with arc detection unit, is used for the digital data transmission to host.
Preferably, the arc detection unit includes circuit board and arc-detection coil, arc-detection coil position
In the intracorporal upper end of slave shell, the circuit board is located at the intracorporal lower end of slave shell, the arc-detection coil with
The neighbouring setting of circuit board；
Axial position on the slave shell along the arc-detection coil is provided with a through-hole, slave to be set with
On route to be protected between breaker and load.
Preferably, the circuit board includes arc-detection plate and power panel, the power panel and the arc-detection plate
The lower end of the arc-detection coil is stacked in along the radial direction of the arc-detection coil.
Preferably, the upper end of the arc-detection plate and power panel be equipped with arc-detection coil size be adapted
Arc notch, the arc-detection coil are installed at the arc notch.
Preferably, the intracorporal upper end of slave shell is for placing arc-detection coil, edge is and arc-detection
The adaptable arc of coil outer diameter；
Lower end is rectangular-shaped for placing the arc-detection plate and power panel stacked, edge in the slave shell.
Preferably, the slave is changed with time song using the half wave cycles of software simulation electric arc with obtaining electric arc
Line, and then fault electric arc is identified.
Preferably, the position that the lower end side of the slave shell corresponds to arc-detection plate is equipped with data-interface.
Another aspect of the present invention, provides a kind of host for split type fault electric arc detector, which includes
Main control unit, the second communication unit, alarm unit and the power supply unit of host shell and position in the inner；
Second communication unit is connect with the main control unit, for receiving detecting as fault electric arc for slave transmission
As a result digital signal, and by the digital data transmission to main control unit；
The main control unit, for being handled according to the digital signal received fault electric arc, and it is logical with host computer
News；
The alarm unit is connect with the main control unit, in response to the indication signal of main control unit, to fault electric arc into
Row alarm；
Said supply unit is connect with main control unit, for powering for host and slave.
Preferably, further including third communication unit, the third communication unit connects with main control unit and host computer respectively
It connects, to the communication channel as main control unit and host computer.
Another aspect of the invention provides a kind of split type fault electric arc detector, the split type fault electric arc detection
Device includes slave as described above and host as described above, and the slave is set in the line to be protected between breaker and load
On the road, fault electric arc detection is carried out to the route to be protected, and will test result and is transmitted to host, institute in the form of digital signal
It states host according to the digital signal to handle fault electric arc, it is preferred that fault electric arc information is transmitted to host computer.
Preferably, being connected between the host and the slave by two lines bus.
Compared with prior art, the invention has the benefit that
1) host is only installed on distribution box guide rail i.e. by the present invention during installation using split type master-slave machine structure
Can, slave is set on the route to be protected between breaker and load, even the corresponding multiple slaves of connection of individual host,
More guideway spaces will not be occupied, from solve the problems, such as at all conventional failure arc detector occupy guideway space it is more；
2) due to being communicated between host and slave by digital signal, host only need to the digital signal received into
Row respective handling, therefore, not only long transmission distance, and individual host connects multiple slaves this one and drags more structure type not
The data processing speed that will affect host can effectively ensure that fault electric arc treatment effeciency；And use digital communication, wiring compared with
It is few, installation, the wiring difficulty of the fault electric arc detector are reduced, maintenance cost is advantageously reduced；In addition, to be detected when increasing
When the quantity of route, it is only necessary to accordingly increase the quantity of slave, save material cost；
3) when slave is installed, it is only necessary to the route (firewire) to be protected be made to pass through slave, it is not necessary to open-circuit line, relatively
In the prior art, reduce contact, reduces a possibility that fault electric arc occurs；
4) power supply and detection part are divided into two pieces of circuit boards inside slave, and two pieces of circuit boards stack rear and arc-detection
Coil is disposed adjacent, to reduce the volume of slave, further saves space.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is the connection structure diagram of conventional failure arc detector；
Fig. 2 is the structure principle chart of the split type fault electric arc detector in the embodiment of the present invention one；
Fig. 3 is the connection structure diagram of the split type fault electric arc detector working condition in the embodiment of the present invention one；
Fig. 4 is the explosive view of split type fault electric arc detection slave in the embodiment of the present invention one.
Fig. 5 is the arc detection circuitry schematic diagram of split type fault electric arc detection slave in the embodiment of the present invention one；
Fig. 6 (a) is tandem type arcing principle schematic diagram；
Fig. 6 (b) is parallel connection type arcing principle schematic diagram；
Fig. 6 (c) is the schematic illustration of arc resistance electric leakage；
Fig. 7 is the electric current of tandem type fault electric arc and the citing waveform diagram of voltage；
Fig. 8 is the electric current of parallel connection type fault electric arc and the citing waveform diagram of voltage；
Fig. 9 is the workflow that split type fault electric arc detection slave carries out fault electric arc detection in the embodiment of the present invention one
Figure；
Figure 10 is the software flow that split type fault electric arc detection slave carries out fault electric arc detection in the embodiment of the present invention one
Cheng Tu.
Wherein, 1, fault electric arc detector；2, guide rail；3, breaker；4, it loads；
11, host；12, slave；
111, main control unit；112, the second communication unit；113, third communication unit；114, power supply unit；115, it alarms
Unit；
121, slave shell；122, power panel；123, arc-detection plate；124, arc-detection coil；125, through-hole；126,
Data-interface；1241, the first communication unit.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
In addition, in the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ",
" width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two
It is a or more than two, unless otherwise restricted clearly.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
Embodiment one
A kind of split type fault electric arc detector, as shown in Figure 2 and Figure 3, including host 11 and one or more are connected thereto
Slave 12；Wherein:
Slave 12 is sleeved on the route to be protected between breaker 3 and load 4, is on the route to be protected for detecting
No there are fault electric arcs, and fault electric arc testing result is transferred to host 11 in the form of digital signal；It is specific:
In the present embodiment, slave 12 include slave shell 121 and position in the inner and arc detection unit interconnected and
First communication unit 1241, the type that arc detection unit is used to detect the electric arc on route to be protected are detected, judge to examine
The electric arc measured is non-faulting electric arc or fault electric arc, and fault electric arc testing result is transmitted in the form of digital signal
The main control unit 111 of host 11, the first communication unit 1241, for providing information transfer channel for arc detection unit.
As shown in figure 4, the arc detection unit of slave part includes circuit board and arc-detection coil in the present embodiment
124, for the volume for minimizing slave, and the circuit board of slave is divided into 123 two parts of power panel 122 and arc-detection plate,
And power panel 122 and arc-detection plate 123 are stacked in the lower end of arc-detection coil 124 along the radial direction of arc-detection coil 124；
Axial position on slave shell 121 corresponding to 124 center of arc-detection coil is provided with through-hole 125, the fire of route to be protected
Line is passed through from the through-hole 125.It is to be appreciated that as shown in Figure 1, being needed when being installed to traditional fault electric arc detector 1
Cut the line between breaker 3 and load 4, that is, need to break and conventional failure arc detector 1 is installed, installation procedure compared with
For complexity, and installation of breaking will increase more contacts, can generate many hidden danger, such as increase the occurrence probability of fault electric arc；And
As can be seen from Figure 4, the slave 12 of split type fault electric arc detector does not need the connection of cut-off breaker 3 and load 4, only will be to
The firewire on survey line road passes through slave by through-hole 125, realizes the installation that do not break.This wiring construction is in engineering construction
On, installation procedure is not only simplified, and can avoid increasing bring security risk due to contact well.
In the present embodiment, for the volume for further decreasing slave 12, the upper end of arc-detection plate 123 and power panel 122 is equal
Equipped with the arc notch being adapted with 124 size of arc-detection coil, arc-detection coil 124 is installed at arc notch, with
Reduce the longitudinal size of slave shell 121.
The edge of 121 lower end of slave shell be it is rectangular-shaped, for placing the arc-detection plate and power panel 122 that stack；On
End margin is the arc being adapted with 124 outer diameter of arc-detection coil, for placing arc-detection coil 124.
The position that the lower end side of slave shell 121 corresponds to arc-detection plate 123 is equipped with data-interface 126, convenience pair
Arc-detection plate 123 carries out burning program and debugging.
In the present embodiment, host 11 is connect with the breaker 3 on route to be protected, is detected according to the fault electric arc received
(digital signal form) is as a result, handle fault electric arc.As shown in Fig. 2, host 11 include host shell and position in the inner
Main control unit 111, the second communication unit 112, alarm unit 115 and power supply unit 114, in which:
Main control unit 111, for being handled according to the fault electric arc information received fault electric arc, and and host computer
Communication；
Second communication unit 112 is connect with the main control unit 111, logical for providing information transmission for main control unit 111
Road；Alarm unit 115 is connect with main control unit 111, in response to the indication signal of main control unit 111, is reported to fault electric arc
It is alert；
Power supply unit 114 is connect with main control unit 111, for powering for host 11 and slave 12, in the present embodiment, and power supply
Unit 114 using high thermal conductive resin, aluminum hull encapsulating ACDC switch power module, the power module have power it is big, it is small in size,
High conversion efficiency, performance more preferably, multiple-protection, reliable and stable feature, guarantee power supply in the case where, make host 11 in distribution
The width of cabinet guide rail 2 is small as far as possible.
The host 11 of the split type fault electric arc detector 1 provided in the present embodiment, also reservation conventional failure arc detection
RS485 bus interface and relay output interface possessed by device 1, while third communication unit 113 is also added, the third is logical
The wireless network connection of diversified forms, such as WiFI/LoRa/NB-IoT can be used in news unit 113, in host 11 using unification
Interface standard, interface correspond to fixed-size pcb board, the connection type of wireless network can be selected according to field condition, one
Positive effect is played in the engineering project of a little inconvenient paving lines；The increase of third communication unit 113, further promotes product and intelligence
Intelligent fire-fighting, smart city seamless interfacing, more convenient client understands the warning message of equipment, statistical information from cell phone client
Etc. the information that understands in a hurry of client.Preferably facilitate the use of client.
Host 11 is connected with slave 12 by two lines bus, two lines bus be it is a kind of relative to four-wire system (Liang Gen power supply line,
Two communication lines), supply lines and signal wire are combined into one, the technology of signal and a shared bus of powering.Two lines bus is anti-
The features such as interference is strong, communication distance is remote, nonpolarity wiring, topological wiring, low cable requirement, not only meets the transmission of data,
But also power supply can be provided for slave 12, to avoid having more two power supply power supply lines.The transmission range of two lines bus is according to master
Depending on electromechanical source power consumption, maximum transmission distance can achieve 3000m, have exceeded the RS485 bus or CAN bus of industrial application
Maximum transmission distance；In addition, requirement of the two lines bus to cable is told somebody what one's real intentions are, strong interference immunity；Power supply and signal are saved without isolation
Cost is isolated.
In the present embodiment, host 11 is installed on the guide rail 2 of distribution box, and the width of occupied guide rail 2 is 5P (90mm), it
The width for occupying guide rail 2 will not be constantly increasing with the increase of 4 numbers of load.According to conventional failure arc detector 1
The width of guide rail 2 occupied by 1 tunnel of mounting means load 4 is at least 2P (36mm), with the increase of 4 numbers of load, then 2 institute of guide rail
The width to take up space increases according to the multiple of 2P (36mm), far beyond the width 5P fixed now
(90mm), thus when conventional failure arc detector 1 is installed, when the number for loading 4 is more, the guide rail of distribution box
2 are spatially difficult to carry, and also increase because of installation and the increase of maintenance difficulties in cost.This point provided in this embodiment
Body formula fault electric arc detector 1 compensates for the deficiency of conventional failure arc detector 1 well, and reduces material, installation
And maintenance cost.
To sum up, host 11 is only installed on distribution box during installation using split type master-slave machine structure by the present embodiment
On guide rail 2, slave 12 is set on the route to be protected between breaker 3 and load 4, and even individual host is corresponding
Multiple slaves are connected, more 2 spaces of guide rail will not be occupied, are led from solving the occupancy of conventional failure arc detector 1 at all
Problem more than 2 space of rail；And due to being communicated between host 11 and slave 12 by digital signal, host 11 is only needed to reception
The digital signal arrived carries out respective handling, and therefore, individual host 11 connects multiple slaves 12 this one and drags more structure type simultaneously
The data processing speed that will not influence host 11 can effectively ensure that fault electric arc treatment effeciency；And between host 11 and slave 12
Digital communication is carried out, therefore wiring is less, reduces installation, the wiring difficulty of the fault electric arc detector 1, advantageously reduces dimension
Protect cost；In addition, when increasing the quantity of route to be detected, it is only necessary to accordingly increase the quantity of slave 12, save material
Cost.
In addition, power supply and detection part are divided into two pieces of circuit boards inside slave 12, and two pieces of circuit boards stack rear and electricity
Arc detection coil 124 is disposed adjacent, to reduce the volume of slave 12, further saves space.
It further illustrates:
The present embodiment main distinction is not only in that the knot of split type structure and host and slave processors itself in the feature of the prior art
Structure also resides in after setting split type structure for fault electric arc detector, between host and slave by way of digital signal
Carry out information transmission, premise are as follows: slave part treats detection route and carries out arc-detection, whether judges detected electric arc
For fault electric arc, and host, base are transferred in the form of digital signal using whether the electric arc is fault electric arc as testing result
In this, slave part complete independently arc-detection and type judgement work；Host is according only to the digital signal detection failure electricity
The occurrence frequency of arc, and according to the frequency to fault electric arc carry out subsequent processing (including to host computer send fault electric arc where
The information of route, control alarm unit alarm and are stored, shown to fault electric arc information).
1, to the further explanation of slave:
It is provided on arc-detection plate from machine controller, arc detection circuitry, in the slave as disclosed in Fig. 5 in the present embodiment
The circuit diagram of arc detection circuitry is it is found that arc detection circuitry passes through upper end in two terminals of A+ and A- and slave shell
The connection of arc-detection coil, treat detection route and carry out arc-detection, and after the arc information that will test amplifies, lead to
It crosses output end B1 to be sent to from machine controller, is based on this, the overall work principle of slave are as follows: arc-detection route is to arc-detection
Curent change situation in coil is detected and will test result and is transmitted to from machine controller, from machine controller according to the electric current
Situation change with time to judge in route to be detected with the presence or absence of electric arc and existing electric arc whether to be fault electric arc.
To keep the technical solution of the present embodiment more complete, the classification of fault electric arc and discriminating conduct are carried out below specific
Illustrate:
In this field, " bad arc " refers in particular to " fault electric arc ", and the time that it occurs in electrical system and place are unpredictable,
Generation scale and duration are difficult to control, and do not have periodically, are easy lasting, development, sprawling, ultimately cause equipment and line
Path loss is bad, until leading to electrical fire.
In the prior art, divide fault electric arc to three classes, be respectively as follows:
A) energized conductor itself fracture or the electric arc because of poor contact generation, because electric arc and load are in series relationship,
Referred to as " tandem type electric arc ", shown in the corresponding structural principle of this kind of electric arc such as Fig. 6 (a)；
B) electric arc between energized conductor (phase line and phase line, phase line and the neutral conductor), also referred to as " arc resistance short circuit ", because of electricity
Normal load on arc and route is in parallel relationship, also known as " parallel connection type electric arc ", the corresponding structural principle of this kind of electric arc such as Fig. 6
(b) shown in；
C) electric arc between electric conductor and earth conductor (PE line, equipment external conductive casing of ground connection etc.), also referred to as " electricity are charged
Arc ground fault " or " arc resistance electric leakage ", shown in the corresponding structural principle of this kind of electric arc such as Fig. 6 (c)；
By taking tandem type fault electric arc as an example, the waveform that electric current and voltage change over time is referring to Fig. 7.Electric current and voltage wave
Just as phase, and occurs the flat waveform of shoulder near each zero passage of electric current.This is because lighting and extinguishing when each zero passage
Caused by arc process, voltage waveform is in arc ignition and extinguishes the outer approximate rectangular wave in part, for series fault, due to series connection
Arc voltage, current effective value I2T is lower than route rated current, therefore overcurrent protective device will not be caused to act, therefore,
It is easier to cause electrical fire.
Again by taking parallel connection type fault electric arc as an example, referring to Fig. 8, since this fault electric arc is usually what interruption occurred, thus it is electric
The waveform of arc current and voltage is also what interruption generated, and current effective value and load current value are small compared with direct short-circuit situation,
Also there is shoulder in current waveform during arcing.
In traditional arc method for measuring, when detecting to electric arc, conventional failure arc detector uses alternating current
Measurement unit of the period of zero point as half wave cycles N is pressed through, half wave cycles N referred to herein refers to the supply rings in 50Hz
Under border, the period of voltage over zero variation is 10ms, carries out the timing of 1s in this way, therefore, this mode need to rely on friendship
Galvanic electricity is completed.In the present embodiment, since traditional fault electric arc detection function is moved to split type fault electric arc detector
Slave part determines the half wave cycles time using the method that software is simulated, not only may be used to solve the measurement problem of half wave cycles
To guarantee the accuracy of timekeeping of 1s, it can be also detached from the dependence to alternating current, furthermore, it is possible to which zero cross detection circuit is removed, simplify electricity
Circuit trace in arc detection plate.Referring to Fig. 9, in the present embodiment, split type fault electric arc detector carries out the tool of arc-detection
Body method is as follows:
S01: slave carries out arc-detection to transmission line of electricity, as time zero at the time of detecting electric arc for the first time,
Using the internal clocking timing of slave control chip, is continuously carried out to the electric current in transmission line of electricity half-wave week in predetermined period
Phase sampling；
Predetermined period is determined according to the current-carrying half wave cycles of institute in transmission line of electricity, by taking 220V alternating current as an example, half-wave week
Phase is 10ms, and predetermined period must be the integral multiple of 10ms.Under normal circumstances, when half wave cycles are 10ms, predetermined period is set as
1s。
S02: the parameter attribute of curent change in detected transmission line of electricity is recorded；
Wherein, parameter attribute includes sampling instant t and current amplitude A and phase in the corresponding transmission line of electricity of the sampling instant
Position ω；Reference data include in transmission line of electricity contained electric current correspond to half wave cycles sampled point not under by electric arc disturbance state
Amplitude A0And phase ω0。
S03: parameter attribute is compared with the reference data prestored, is judged in half wave cycles with the presence or absence of electric arc；
If each single item parameter in parameter attribute exceeds the normal data range of respective items in reference data, judgement should
There are electric arcs in half wave cycles.
S04: the periodicity and quantity occurred according to electric arc in predetermined period judges whether there is fault electric arc.
If the appearance of electric arc does not have periodically in predetermined period, and there is number greater than critical mass in electric arc, then this is pre-
If cycle memory is in fault electric arc.
It needs to illustrate: in the prior art to the alarm rule of municipal power failure electric arc are as follows: reach 14 periods or more in 1 second
Half-wave electric arc, and detected electric arc do not have periodically, then be determined as fault electric arc, therefore, slave part need to therefore
The periodicity and occurrence frequency for hindering electric arc are detected, it is determined whether are fault electric arc.Based on this, the software implementation of the above process
Process is referring to Figure 10.The present embodiment simulates half wave cycles by using software to carry out fault electric arc detection, examines fault electric arc
Survey process is detached from dependence to ac zero-crossing point, simplifies circuit structure, while being also fault arc detection device to split type
Structure direction development provides technical support.
When the arc detection unit in slave detects in transmission line of electricity there are when fault electric arc, which is converted
For digital signal, host machine part is transmitted to by the first communication unit, tripping action is executed by host machine part control breaker, and
When necessary, it after host receives the digital signal that slave is sent, is broken down by third communication unit 113 to host computer
The line information to be protected of electric arc.
In addition, in other embodiments, the arc detection unit in slave can also be direct with the alarm unit in host
Connection directly triggers alarm unit and alarms in the presence of arc detection unit detects fault electric arc.
2, to the further explanation of host:
Host computer polls slave obtains digital signal, and the route that detection slave is installed is with the presence or absence of fault electric arc, if it exists
Fault electric arc then controls corresponding breaker and executes tripping action, otherwise, continues poll slave and obtains digital signal.
Host is only installed on distribution box guide rail i.e. by the present embodiment during installation using split type master-slave machine structure
Can, slave is set on the route to be protected between breaker and load, even the corresponding multiple slaves of connection of individual host,
More guideway spaces will not be occupied, from solve the problems, such as at all conventional failure arc detector occupy guideway space it is more；
Due to being communicated between host and slave by digital signal, host only needs to carry out the digital signal received
Respective handling, therefore, not only long transmission distance, and individual host connects multiple slaves this one and drags more structure type can't
The data processing speed for influencing host, can effectively ensure that fault electric arc treatment effeciency；And use digital communication, wiring compared with
It is few, installation, the wiring difficulty of the fault electric arc detector are reduced, maintenance cost is advantageously reduced；In addition, to be detected when increasing
When the quantity of route, it is only necessary to accordingly increase the quantity of slave, save material cost；
When slave is installed, it is only necessary to the route (firewire) to be protected be made to pass through slave, it is not necessary to open-circuit line, relative to
The prior art reduces contact, reduces a possibility that fault electric arc occurs；
Power supply and detection part are divided into two pieces of circuit boards inside slave, and two pieces of circuit boards stack rear and arc-detection line
Circle is disposed adjacent, to reduce the volume of slave, further saves space.
It needs to illustrate:
It above are only one embodiment of the present of invention, it should be understood by those skilled in the art that, implementation of the invention
Example can provide as method, system or computer program product.Therefore, complete hardware embodiment, complete software can be used in the present invention
The form of embodiment or embodiment combining software and hardware aspects.
In addition, it should be noted that:
" one embodiment " or " embodiment " mentioned in specification means the special characteristic described in conjunction with the embodiments, structure
Or characteristic is included at least one embodiment of the present invention.Therefore, the phrase " reality that specification various places throughout occurs
Apply example " or " embodiment " the same embodiment might not be referred both to.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of slave for split type fault electric arc detector, which is characterized in that be set between breaker and load
On route to be protected, including slave shell and be located at the intracorporal arc detection unit of slave shell and the first communication unit,
The arc detection unit for electric arc type to be detected and judged, and will turn the testing result of fault electric arc
It is changed to digital signal；
First communication unit, connect with arc detection unit, is used for the digital data transmission to host.
2. the slave according to claim 1 for split type fault electric arc detector, which is characterized in that the electric arc inspection
Surveying unit includes circuit board and arc-detection coil, and the arc-detection coil is located at the intracorporal upper end of slave shell, described
Circuit board is located at the intracorporal lower end of slave shell, the arc-detection coil and the neighbouring setting of the circuit board；
Axial position on the slave shell along the arc-detection coil is provided with a through-hole, disconnected slave to be set in
On route to be protected between road device and load.
3. the slave according to claim 2 for split type fault electric arc detector, which is characterized in that the circuit board
Including arc-detection plate and power panel, the power panel and the arc-detection plate are stacked along the radial direction of the arc-detection coil
In the lower end of the arc-detection coil.
4. the slave according to claim 3 for split type fault electric arc detector, which is characterized in that the electric arc inspection
The upper end of drafting board and power panel is equipped with the arc notch being adapted with arc-detection coil size, the arc-detection coil card
At the arc notch.
5. the slave according to claim 4 for split type fault electric arc detector, which is characterized in that
The intracorporal upper end of slave shell is to be adapted with arc-detection coil outer diameter for placing arc-detection coil, edge
Arc；
Lower end is rectangular-shaped for placing the arc-detection plate and power panel stacked, edge in the slave shell.
6. the slave according to claim 1 for split type fault electric arc detector, which is characterized in that the slave is adopted
With the half wave cycles of software simulation electric arc, to obtain electric arc versus time curve, and then fault electric arc is identified.
7. a kind of host for split type fault electric arc detector, which is characterized in that in the inner including host shell and position
Main control unit, the second communication unit, alarm unit and power supply unit；
Second communication unit is connect with the main control unit, for receiving the conduct fault electric arc testing result of slave transmission
Digital signal, and by the digital data transmission to main control unit；
The main control unit is communicated for being handled according to the digital signal received fault electric arc, and with host computer；
The alarm unit is connect with the main control unit, in response to the indication signal of main control unit, is reported to fault electric arc
It is alert；
Said supply unit is connect with main control unit, for powering for host and slave.
8. the host according to claim 7 for split type fault electric arc detector, which is characterized in that further include third
Communication unit, the third communication unit is connect with main control unit and host computer respectively, to as main control unit and host computer
Communication channel.
9. a kind of split type fault electric arc detector, which is characterized in that including slave such as of any of claims 1-6
With the host as described in any one of claim 7-8, the slave is set in the route to be protected between breaker and load
On, fault electric arc detection is carried out to the route to be protected, and will test result and be transmitted to host in the form of digital signal, it is described
Host is according to the digital signal handled fault electric arc.
10. a kind of split type fault electric arc detector according to claim 9, which is characterized in that the host with it is described
It is connected between slave by two lines bus.
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| CN201811442007.3A CN109239561A (en) | 2018-11-29 | 2018-11-29 | Slave, host and detector for split type fault electric arc detector |
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| CN201811442007.3A CN109239561A (en) | 2018-11-29 | 2018-11-29 | Slave, host and detector for split type fault electric arc detector |
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Cited By (1)
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Address after: 315336 block a, building 17, No. 77, Binhai 2nd Road, Hangzhou Bay New District, Ningbo City, Zhejiang Province Applicant after: Zhejiang Xiyu Intelligent Technology Co., Ltd Address before: 315336 No. 2 Binhai Road, Hangzhou Bay New Area, Ningbo City, Zhejiang Province Applicant before: NINGBO XIYU INTELLIGENT TECHNOLOGY Co.,Ltd. |