CN109031051A - A kind of low-voltage electrical line fault electric arc monitoring systems - Google Patents
A kind of low-voltage electrical line fault electric arc monitoring systems Download PDFInfo
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- CN109031051A CN109031051A CN201811117570.3A CN201811117570A CN109031051A CN 109031051 A CN109031051 A CN 109031051A CN 201811117570 A CN201811117570 A CN 201811117570A CN 109031051 A CN109031051 A CN 109031051A
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- electric arc
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The invention discloses a kind of low-voltage electrical line fault electric arc monitoring systems, including multiple fault electric arc probe nodes for detecting information of voltage and temperature information in low-voltage electrical route, the multiple fault electric arc repeaters for positioning failure electric arc position being connect with the fault electric arc probe node, the fault electric arc monitoring host being connect with the fault electric arc repeater, the central controller being connect with fault electric arc monitoring host, and the power switch for the circuit on or off for controlling each fault electric arc probe node and fault electric arc repeater being connect with the central controller.The present invention has monitoring accuracy height and fireballing feature, has very strong promotional value and use value.
Description
Technical field
The present invention relates to a kind of low-voltage electrical Line technology fields, specifically, being to be related to a kind of low-voltage electrical route event
Hinder electric arc monitoring systems.
Background technique
Electric arc is a kind of gas ionization electric discharge phenomena and a kind of plasma, and the electric arc on route can be divided into two kinds, one
Kind is normal operation arc, is claimed " good arc "；Another kind is fault electric arc, is claimed " bad arc "." good arc " refers to motor rotation (such as electricity
Brill, dust catcher etc.) electric arc that generates, certainly, the arc that when people's device for switching, plugging electric generates also belongs to " good arc ".It is " bad
Arc " i.e. fault electric arc, the main harm of fault electric arc are to cause fire, and the high temperature high fever that fault electric arc generates easily is ignited
Line insulation layer causes route on fire, if there are when combustible near fault point, also easily igniting flammable items and cause
The generation of fire.
Electrical fire accident causes increasing threat to the life and property of people, due to fault electric arc not necessarily table
It is now current anomaly, therefore traditional electric protective equipment, such as overcurrent protection electric appliance and residual current protecting electric appliance are to event
Barrier electric arc cannot be detected and be protected well, therefore can not be played effective protection for accident caused by fault electric arc and be made
With then, fault electric arc detection system is electrical as the protection of detection fault electric arc, prevention fault electric arc is caused various
Accident has irreplaceable role.
In practical power utilization environment, switch frequent operation, the moment of plug plug, various complex loads is deposited in route
In addition poor contact or loosening etc. may cause the generation of fault electric arc.Generating arc light is the additional of more serious electric arc
Phenomenon, when on the one hand there is arc light, electric arc has generated a period of time, and accident may have occurred and that, can not play the work of prevention
With；On the other hand, relatively weak electric arc may not generate arc light, to can not be detected, but these relatively weak electric arcs
Fault electric arc accident can equally be caused.
Feasible fault arc detection method is to be realized by the detection of voltage and temperature, but fault electric arc signal is more multiple
Miscellaneous, the form of expression is similar with the operating current under some complex load environment, so be easy to cause erroneous judgement or fail to judge, how
It can accurately and effectively identify fault electric arc, and be not limited to specific fault electric arc type, be desired in the industry.
Summary of the invention
The purpose of the present invention is to provide a kind of low-voltage electrical line fault electric arc monitoring systems, the present invention has monitoring essence
Degree height and fireballing feature.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of low-voltage electrical line fault electric arc monitoring systems, including for detecting the current information in low-voltage electrical route
What is connect with multiple fault electric arc probe nodes of temperature information, with the fault electric arc probe node is used for positioning failure electric arc
Multiple fault electric arc repeaters of position, the fault electric arc being connect with fault electric arc repeater monitoring host and institute
State fault electric arc monitoring host connection central controller, and connect with the central controller be used for control each failure
The power switch of the circuit on or off of arc detection node and fault electric arc repeater.
Further, the hardware circuit of the fault electric arc probe node includes governor circuit, and with the master respectively
Control circuit connection temperature sensor and acquisition decision circuit, wherein the temperature sensor includes power supply VCC, and with
Resistance R1, resistance R2, light emitting transistor Q, capacitor C, port Part1, the port Part2, port of the power supply VCC connection
Part3 and AT89C2051 single-chip microcontroller；The resistance R2 connects the port AT89C2051 single-chip microcontroller P1.0, and the capacitor C mono- terminates electricity
R2, other end ground connection are hindered, the triode Q base stage connects the port single-chip microcontroller P1.1 AT89C2051 and resistance R1, collector simultaneously
Connecting resistance R1, emitter ground connection, the port Part1, port Part2, port Part3 connect with AT89C2051 single-chip microcontroller respectively
It connects.
Still further, the fault electric arc probe node further includes acquisition decision circuit, the acquisition decision circuit packet
The input and door A that Y2 mouthfuls connect with governor circuit are included, output end successively inputs the port B1, the port B2, the port B3 with door A with three
Comparator A1, comparator A2 and the comparator A3 of connection, one end are negative with comparator A1, comparator A2 and comparator A3 input respectively
Pole connection and other end external power supply VCC current-limiting resistance R1, one end respectively with comparator A1, comparator A2 and comparator A3
Input the divider resistance R2 of cathode connection and other end ground connection, the first filtered electrical that one end is connect with comparator A1 input anode
Road is connect, for the port Part1 of the external temperature sensor, one end and comparator A2 with the first filter circuit other end
Second filter circuit of input anode connection, connect, for the external temperature sensor with the second filter circuit other end
Port Part2, the third filter circuit that one end is connect with comparator A3 input anode, and connect with the third filter circuit other end
It connects, for the port Part3 of external temperature sensor.
Still further, first filter circuit includes one end connect with comparator A1 input anode and the other end and
The capacitor C1 of port Part1 connection, one end is connect with the capacitor C1 other end and the inductance L1 of other end ground connection；Second filter
Wave circuit includes one end and comparator A2 input anode connect and capacitor C2 that the other end is connect with port Part2, one end and
The inductance L2 of the connection of the capacitor C2 other end and other end ground connection；The third filter circuit includes that one end and comparator A3 are inputted
The capacitor C3 that anode connection and the other end are connect with port Part3, one end is connect with the capacitor C3 other end and another termination
The inductance L3 on ground.
Still further, being equipped with timing unit and data storage cell, the timing list in the fault electric arc repeater
Member goes out the temperature change of low-voltage electrical route according to accumulative time analysis for adding up to the time interval of temperature change
Speed judge the position where fault electric arc, and store in data storage cell, in turn in conjunction with the information of voltage of acquisition
Temperature information and information of voltage are sent to fault electric arc monitoring host.
It is connect still further, the fault electric arc repeater monitors host with fault electric arc by RS-485, Yong Huke
The working condition of each fault electric arc repeater and fault electric arc probe node is inquired on fault electric arc monitoring host.
Compared with prior art, the invention has the following advantages:
(1) each fault electric arc repeater in the present invention is only responsible for carrying out respectively following fault electric arc probe node
Reading data, fault electric arc monitoring host passes through the storing data for operating each fault electric arc repeater respectively, thus indirectly
Realize that a situation arises is monitored to the fault electric arc of fault electric arc probe node, the present invention can be to failure electricity by design above
Arc carries out intelligent differentiation, and when break down in low-voltage electrical route electric arc when can disjunction circuit immediately, prevent electrical fire
The generation of calamity improves safety；
(2) the fault electric arc probe node in the present invention detects fault electric arc using analog circuit, can be accurately
The temperature changing speed of low-voltage electrical route is solved, and acquisition decision circuit is combined to detect line voltage distribution, once there is temperature
Degree, electric voltage exception and the electric arc that breaks down, then disconnect the power supply of low voltage electrical equipment, avoids low-voltage electrical line facility from occurring different
Often, cause the damage of fire or equipment, the system is easy to control, monitoring convenience, while reduce accident generation probability, it can be achieved that
The on-line monitoring of low voltage electrical equipment.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is temperature sensor circuit figure of the invention.
Fig. 3 is acquisition decision circuit figure of the invention.
Fig. 4 is the structural schematic diagram of fault electric arc repeater of the invention.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
Embodiment
As Figure 1 and Figure 4, a kind of low-voltage electrical line fault electric arc monitoring systems disclosed by the invention, including for examining
Multiple fault electric arc probe nodes of the current information and temperature information surveyed in low-voltage electrical route are detected with the fault electric arc
Node connection connects for multiple fault electric arc repeaters of positioning failure electric arc position, with the fault electric arc repeater
The fault electric arc monitoring host connect, the central controller being connect with fault electric arc monitoring host, and controlled with the center
The power supply of the circuit on or off for controlling each fault electric arc probe node and fault electric arc repeater of device connection processed
Switch, the fault electric arc repeater is interior to be equipped with timing unit and data storage cell, and the timing unit is used to become temperature
The time interval of change is added up, and the speed of the temperature change of low-voltage electrical route is gone out according to accumulative time analysis, in conjunction with
The information of voltage of acquisition, judges the position where fault electric arc, and stores in data storage cell, and then by temperature information and electricity
Pressure information is sent to fault electric arc monitoring host, and the fault electric arc repeater monitors host by RS-485 and fault electric arc and connects
It connects, user can inquire the work shape of each fault electric arc repeater and fault electric arc probe node on fault electric arc monitoring host
State.
As shown in Fig. 2, the fault electric arc probe node includes temperature sensor, the temperature sensor includes power supply
VCC, and the resistance R1, resistance R2, light emitting transistor Q, capacitor C, the port Part1, port that are connect with the power supply VCC
Part2, port Part3 and AT89C2051 single-chip microcontroller；The resistance R2 connects the port AT89C2051 single-chip microcontroller P1.0, the capacitor
Mono- terminating resistor R2 of C, other end ground connection, the triode Q base stage connect the port single-chip microcontroller P1.1 AT89C2051 and resistance simultaneously
R1, collector connecting resistance R1, emitter ground connection, the port Part1, port Part2, port Part3 respectively with AT89C2051
Single-chip microcontroller connection.
In the present embodiment, temperature is measured using the temperature-voltage characteristic of its pn-junction as temperature element using triode Q
Variation, the comparator that temperature voltage signal and resistance R2 and capacitor C integrated signal are then sent to AT89C2051 single-chip microcontroller is defeated
Enter end.In AT89C2051 single-chip microcontroller, the input port of comparator is P1.0 and P1.1, and wherein P1.0 is non-inverting input terminal,
P1.1 is inverting input terminal, and output end is P3.6.P1.0 is both the input terminal of comparator, while the still output end of single-chip microcontroller
Mouthful, it has the property of one-chip machine port, it may be assumed that when P1.0 exports high level, is equivalent to internal open collector state.Here,
The control that capacitor charge and discharge is realized using the function, when accident amount temperature, P1.0 exports low level, and capacitor both end voltage is 0V.
When measuring temperature, start T0 counter first, P1.0 then set into high level, gives capacitor C to charge via resistance R2, resistance R1,
Meanwhile single-chip microcontroller continuously judges the state of P3.6.When the voltage of P1.0 is greater than the voltage of P1.1, comparator output terminal P3.6 is turned over
Turn, in the charging time before single chip computer measurement overturning, obtains time value, the temperature value that can be then measured.
As shown in figure 3, the acquisition decision circuit includes the Y2 mouthfuls of inputs connecting with the governor circuit and door A, output
End successively with two input the comparator A1, the comparator A2 that are connect with the port B1 of door A, the port B2, one end respectively with comparator A1,
Comparator A2 input cathode connection and other end external power supply VCC current-limiting resistance R1, one end respectively with comparator A1, compared with
Device A2 inputs the divider resistance R2 of cathode connection and other end ground connection, the first filter that one end is connect with comparator A1 input anode
Wave circuit is connect, for the port Part1 of external temperature sensor, one end and comparator A2 with the first filter circuit other end
Second filter circuit of input anode connection, connect, for the port of external temperature sensor with the second filter circuit other end
Part2, one end input the third filter circuit that anode is connect with comparator A3, and connect with the third filter circuit other end,
For the port Part3 of external temperature sensor, first filter circuit includes that one end is connect with comparator A1 input anode
And the capacitor C1 that the other end is connect with port Part1, one end is connect with the capacitor C1 other end and the inductance of other end ground connection
L1；Second filter circuit includes one end to be connect and the other end is connect with port Part2 with comparator A2 input anode
Capacitor C2, one end is connect with the capacitor C2 other end and the inductance L2 of other end ground connection；The third filter circuit includes one end
With the positive capacitor C3 connecting and the other end is connect with port Part3 of comparator A3 input, one end and the capacitor C3 other end connect
Connect and the other end ground connection inductance L3.
In the present embodiment, the analog signal of acquisition filters out interference wave signal in analog signal by respective filter circuit,
And the branch pressure voltage between resistance R1 and R2 compares respectively, the initial stage, the input cathode voltage U+ of comparator is 0,
The input cathode voltage U- of comparator is greater than input cathode voltage U+, and comparator exports low level, when the input anode of comparator
When voltage U+ is greater than input cathode voltage U-, comparator exports high level, and when three comparators input high level simultaneously, three is defeated
Enter and just export high level with door, is drivingly connected in three input and the component on door, what three analog acquisitions of realization triggered simultaneously sentences
It is fixed.
In the present embodiment, control chip using the single-chip microcontroller of model AT89C2051 as temperature sensor, circuit
Structure belongs to the prior art, and those skilled in the art can be certainly based on the content that the basic common sense and the present embodiment of electronic circuit illustrate
Row configuration, is not illustrating herein.
The present invention has monitoring accuracy height and fireballing feature, has very strong promotional value and use value.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
It encloses, as long as that in body design thought of the invention and mentally makes has no the change of essential meaning or polishing, is solved
The technical issues of it is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (6)
1. a kind of low-voltage electrical line fault electric arc monitoring systems, which is characterized in that including for detecting in low-voltage electrical route
Information of voltage and temperature information multiple fault electric arc probe nodes, connect with the fault electric arc probe node for fixed
Multiple fault electric arc repeaters of position fault electric arc position, the fault electric arc monitoring being connect with the fault electric arc repeater
Host, the central controller connecting with fault electric arc monitoring host, and what is connect with the central controller are used to control
Make the power switch of the circuit on or off of each fault electric arc probe node and fault electric arc repeater.
2. low-voltage electrical line fault electric arc monitoring systems according to claim 1, which is characterized in that the fault electric arc
The hardware circuit of probe node includes governor circuit, and is sentenced with the temperature sensor and acquisition that the governor circuit is connect respectively
Certainly circuit, wherein the temperature sensor includes power supply VCC, and connect with the power supply VCC resistance R1, resistance R2,
Light emitting transistor Q, capacitor C, port Part1, port Part2, port Part3 and AT89C2051 single-chip microcontroller；The resistance R2 connects
The port AT89C2051 single-chip microcontroller P1.0, the mono- terminating resistor R2 of capacitor C, other end ground connection, the triode Q base stage is simultaneously
The port AT89C2051 single-chip microcontroller P1.1 and resistance R1, collector connecting resistance R1 are connected, emitter is grounded, the port Part1,
Port Part2, port Part3 are connect with AT89C2051 single-chip microcontroller respectively.
3. low-voltage electrical line fault electric arc monitoring systems according to claim 2, which is characterized in that the acquisition judgement
Circuit includes the Y2 mouthfuls of inputs connecting with governor circuit and door A, output end successively with the port B1 of three inputs and door A, the port B2,
The port B3 connection comparator A1, comparator A2 and comparator A3, one end respectively with comparator A1, comparator A2 and comparator A3
Input cathode connection and other end external power supply VCC current-limiting resistance R1, one end respectively with comparator A1, comparator A2 and ratio
Compared with device A3 input cathode connection and the divider resistance R2 of other end ground connection, one end input positive first connect with comparator A1
Filter circuit is connect, for the port Part1 of the external temperature sensor with the first filter circuit other end, one end with than
Compared with the second filter circuit that device A2 inputs anode connection, it connect with the second filter circuit other end, is passed for the external temperature
The port Part2 of sensor, the third filter circuit that one end is connect with comparator A3 input anode, and it is another with third filter circuit
One end connects, for the port Part3 of external temperature sensor.
4. low-voltage electrical line fault electric arc monitoring systems according to claim 3, which is characterized in that first filtering
Circuit includes the capacitor C1 that one end is connect with comparator A1 input anode and the other end is connect with port Part1, one end and electricity
Hold the inductance L1 of the connection of the C1 other end and other end ground connection；Second filter circuit includes that one end and comparator A2 are inputted just
The capacitor C2 that pole connection and the other end are connect with port Part2, one end is connect with the capacitor C2 other end and the other end is grounded
Inductance L2；The third filter circuit includes one end connect and the other end and port Part3 with comparator A3 input anode
The capacitor C3 of connection, one end is connect with the capacitor C3 other end and the inductance L3 of other end ground connection.
5. low-voltage electrical line fault electric arc monitoring systems according to claim 1, which is characterized in that the fault electric arc
Timing unit and data storage cell are equipped in repeater, the timing unit is tired for carrying out to the time interval of temperature change
Meter, the speed of the temperature change of low-voltage electrical route is gone out according to accumulative time analysis, in conjunction with the information of voltage of acquisition, judgement
Position where fault electric arc, and stored in data storage cell, and then temperature information and information of voltage are sent to failure electricity
Arc monitors host.
6. low-voltage electrical line fault electric arc monitoring systems according to claim 1, which is characterized in that the fault electric arc
Repeater monitors host with fault electric arc by RS-485 and connect, and user can monitor in fault electric arc and inquire each failure on host
The working condition of electric arc repeater and fault electric arc probe node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811117570.3A CN109031051A (en) | 2018-09-21 | 2018-09-21 | A kind of low-voltage electrical line fault electric arc monitoring systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811117570.3A CN109031051A (en) | 2018-09-21 | 2018-09-21 | A kind of low-voltage electrical line fault electric arc monitoring systems |
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| Publication Number | Publication Date |
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| CN109031051A true CN109031051A (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811117570.3A Pending CN109031051A (en) | 2018-09-21 | 2018-09-21 | A kind of low-voltage electrical line fault electric arc monitoring systems |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318981A (en) * | 2015-11-12 | 2016-02-10 | 张复祥 | Novel temperature measurement circuit |
| CN105353329A (en) * | 2015-11-19 | 2016-02-24 | 苏州众天力信息科技有限公司 | Fault arc detection system based on cloud network |
| CN106226719A (en) * | 2016-07-14 | 2016-12-14 | 杨林 | A kind of fault electric arc detecting system based on secure cloud network |
| CN107873491A (en) * | 2017-11-22 | 2018-04-06 | 成都信息工程大学 | Based on monolithic processor controlled agricultural irrigation systems |
-
2018
- 2018-09-21 CN CN201811117570.3A patent/CN109031051A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318981A (en) * | 2015-11-12 | 2016-02-10 | 张复祥 | Novel temperature measurement circuit |
| CN105353329A (en) * | 2015-11-19 | 2016-02-24 | 苏州众天力信息科技有限公司 | Fault arc detection system based on cloud network |
| CN106226719A (en) * | 2016-07-14 | 2016-12-14 | 杨林 | A kind of fault electric arc detecting system based on secure cloud network |
| CN107873491A (en) * | 2017-11-22 | 2018-04-06 | 成都信息工程大学 | Based on monolithic processor controlled agricultural irrigation systems |
Non-Patent Citations (2)
| Title |
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| 邓海平: "低压电气线路故障电弧监测系统的设计", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 黄石生 编著: "《新型弧焊电源及其智能控制》", 30 September 2000 * |
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Application publication date: 20181218 |
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