CN207924054U - A kind of fault detector - Google Patents
A kind of fault detector Download PDFInfo
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- CN207924054U CN207924054U CN201820144422.XU CN201820144422U CN207924054U CN 207924054 U CN207924054 U CN 207924054U CN 201820144422 U CN201820144422 U CN 201820144422U CN 207924054 U CN207924054 U CN 207924054U
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Abstract
A kind of fault detector, including main control unit and the short trouble monitoring modular, ground fault detection module, fault indication unit, wireless communication module and the dual-power module that are connected respectively with main control unit；The dual-power module includes sensing power management module and sun-generated electric power management module, the short trouble monitoring modular includes sequentially connected measurement current transform er, signal conditioning circuit and sample circuit, the ground fault detection module includes sampling unit and signal separation unit, the main control unit can be analyzed according to the data that the short trouble monitoring modular and ground fault detection module are monitored, fault condition is judged, fault detector described in the utility model has the advantages that malfunction monitoring sensitivity is low, it is high to run steadily in the long term.
Description
Technical field
The utility model is related to electrical equipment technical field, more particularly to a kind of fault detector.
Background technology
In recent years, fault detector is widely used in China, and fault display device is applied in power distribution network, energy
The irregular operating state of enough distribution lines of detection in real time, quickly detection and the short circuit of positioning line fault or earth fault, help phase
Pass personnel quickly isolate fault section, repair, and reduce power off time and scope of power outage.Therefore, the stabilization of fault detector,
Reliability service is the important indicator for weighing fault detector quality.
But in the prior art, fault detector mainly by lithium battery be used as main power source to fault display device into
Row power supply, lithium battery service life is limited, seriously affects that equipment is long-term, stable operation；What is more important, existing indicating fault
It is typically current break and the duration judgement measured by electromagnetic induction method in circuit that device, which is grounded (short circuit) fault detect,
Failure, or single failure judgement is quantified by the subharmonic mutation of first half-wave/5, malfunction monitoring sensitivity is low, fault detector warp
Constant error moves or tripping.
Utility model content
In view of this, the utility model is directed to a kind of fault detector, supervised with solving current fault detector failure
Survey that sensitivity is low, the problem of can not running steadily in the long term.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of fault detector, including main control unit and be connected respectively with main control unit short trouble monitoring modular,
Ground fault detection module, fault indication unit, wireless communication module and dual-power module；The dual-power module includes induction
Power management module and sun-generated electric power management module, the sensing power management module include sequentially connected taking electric current mutual
Sensor, rectifying protective circuit and DC power supply circuit, the sensing power management module is by taking electric current transformer output sense
Induced current carries out rectification with after protection to induced current, DC power supply is provided for fault detector；The solar-electricity source control
Module includes solar storage battery plate, and the solar storage battery plate is connected by solar cell interface with main control unit；
The short trouble monitoring modular includes sequentially connected measurement current transform er, signal conditioning circuit and sample circuit；It is described
Ground fault detection module includes sampling unit and signal separation unit, and the sampling unit is configured as acquisition and single-phase connect occurs
The magnitude of current caused by the magnitude of current and switching resistance of earth fault circuit, the signal separation unit are used for singlephase earth fault
Exchange fundamental wave and quintuple harmonics in circuit carry out positive and negative half-wave separation, obtain quintuple harmonics head half-wave signas, fundamental wave head half-waves
Signal and resistance switching signal；The main control unit can be according to the short trouble monitoring modular and ground fault detection module
The data monitored are analyzed, and are judged fault condition.
Further, the DC power supply circuit is direct current 5V power circuits, and the direct current 5V power circuits include low work(
Power consumption source chip.
Further, the rectifying protective circuit includes filter capacitor, bridge rectifier, overvoltage crowbar and energy storage
Capacitance.
Further, the dual-power module further includes electric quantity monitoring module, the sensing power management module with it is described
Sun-generated electric power management module is connect by the electric quantity monitoring module with main control unit respectively.
Further, the signal conditioning circuit includes filter capacitor and two electrostatic lightning strike protection pipes, the measurement electricity
Current transformer is connected to the both ends of the filter capacitor, two electrostatic lightning strike protections by measurement current transform er connector
It is in parallel with the filter capacitor after pipe docking.
Further, the sample circuit is A/D sample circuits, and the sample circuit includes that I/V translation circuits and A/D turn
Parallel operation.
Further, the wireless communication module includes at least 3G network, 4G networks, Wi-Fi (802.11) network, Wi-
In Max (802.16) network, RS485, TCP/IP, Bluetooth communication, ZigBee-network, frequency hopping spread spectrum (FHSS) radio net
Any one.
Further, the main control unit is using the embedded microprocessor for supporting real-time multi-task operating system.
Further, storage unit is set in the fault detector, and the storage unit is for storing in main control unit
Obtained fault-signal is analyzed, the storage unit includes that the storage of at least one of following storage media types type is situated between
Matter：Flash-type, hard disk type, solid magnetic disc (SSD) type, silicon disk driver (SDD) type, multimedia card be miniature, card-type memory
(SD or XD type of memory), random access memory (RAM) type, static RAM (SRAM) type, read-only storage
Device (ROM) type, electrically erasable programmable read-only memory (EEPROM) type, programmable read only memory (PROM) type, magnetic storage
Type, magnetic disc type and optical disc type.
Further, the fault detector further includes clock chip, the clock chip and the main control unit interface
It connects in a parallel fashion.
The main control unit of herein described fault detector, short trouble monitoring modular, ground fault detection module, failure
Indicating unit, wireless communication module, dual-power module, storage unit and clock chip are the prior art, and the application only will
These modules and/or unit carry out creative connection, existing in the prior art to solve to form new structure and function
Particular problem.
Compared with the existing technology, fault detector described in the utility model has the advantage that：
(1) fault detector described in the utility model is by using sensing power management module and solar-electricity source control
Module is powered the fault detector, on the one hand, avoids so that induction power supply and measuring circuit share a mutual inductance
Device improves the measurement accuracy of fault detector；On the other hand, it does not use lithium battery as main power source, is not only conducive to environmental protection, and
And conducive to the extension of equipment life so that equipment can be run steadily in the long term.
(2) fault detector described in the utility model is combined using multinomial detection method, can effectively improve ground connection event
Hinder the accuracy rate differentiated.
(3) setting that fault detector described in the utility model passes through storage unit and clock chip so that failure refers to
Show that the historical failure information of device can be preserved, is conducive to technical staff and accumulates data, analyze and research to failure.
In conclusion being not difficult to obtain, fault detector described in the utility model has malfunction monitoring sensitivity low, long-term
The high advantage of stable operation.
Description of the drawings
The attached drawing for constituting the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The illustrative embodiments and their description of type are not constituted improper limits to the present invention for explaining the utility model.
In attached drawing：
Fig. 1 is the fault detector structural schematic diagram described in the utility model embodiment；
Fig. 2 is the structural schematic diagram of the dual-power module described in the utility model embodiment；
Fig. 3 is another structural schematic diagram of the fault detector described in the utility model embodiment.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following exemplary is implemented
Embodiment described in example does not represent all embodiments consistent with the utility model.On the contrary, they be only with
The example of as detailed in the attached claim, the utility model the consistent device and method of some aspects, needs
Illustrate, in the absence of conflict, the feature in the embodiments of the present invention and embodiment can be combined with each other.
It is the purpose only merely for description specific embodiment in the term that the utility model uses, is not intended to be limiting this reality
With novel.In the "an" of the utility model and singulative used in the attached claims, " described " and "the"
It is intended to include most forms, unless context clearly shows that other meanings.It is also understood that term used herein " and/
Or " refer to and include one or more associated list items purposes any or all may combine.
It will be appreciated that though various information may be described using term first, second, third, etc. in the utility model,
But these information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, not
In the case of being detached from the scope of the utility model, the first information can also be referred to as the second information, and similarly, the second information can also
It is referred to as the first information.Depending on context, word as used in this " if " can be construed to " ... when " or
" when ... " or " in response to determination ".
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment 1, as shown in Figs. 1-3, a kind of fault detector, including main control unit and be connected respectively with main control unit
Short trouble monitoring modular, ground fault detection module, fault indication unit, wireless communication module and dual-power module；Institute
It includes sensing power management module and sun-generated electric power management module to state dual-power module, and the sensing power management module includes
It is sequentially connected that electric current transformer, rectifying protective circuit and DC power supply circuit, the sensing power management module is taken to pass through
Electric current transformer output induced current is taken, rectification is carried out with after protection to induced current, direct current is provided for fault detector
Source；The sun-generated electric power management module includes solar storage battery plate, and the solar storage battery plate passes through solar cell
Interface is connected with main control unit；The short trouble monitoring modular includes sequentially connected measurement current transform er, signal tune
Circuit and sample circuit are managed, the short trouble monitoring modular is used to detect the short trouble on transmission line of electricity；The ground connection event
Barrier monitoring modular includes sampling unit and signal separation unit, and the ground fault detection module is for detecting on transmission line of electricity
Short trouble；The sampling unit is configured as acquisition and occurs produced by the magnitude of current and the switching resistance of singlephase earth fault circuit
The magnitude of current, the signal separation unit be used for by singlephase earth fault circuit exchange fundamental wave and quintuple harmonics carry out it is positive and negative
Half-wave detaches, and obtains quintuple harmonics head half-wave signas, fundamental wave head half-wave signas and resistance switching signal；The main control unit can
The data monitored according to the short trouble monitoring modular and ground fault detection module are analyzed, to fault condition into
Row judgement；The wireless communication module with master station communication for connecting；The fault indication unit is used to indicate fault condition.
Further, the sensing power management module is by taking electric current transformer induction to take electricity, specifically, described take
Electric current transformer is described whole by taking electric current transformer connector and the input terminal of the rectifying protective circuit circuit to connect
The output end of stream protection circuit is connect with the input terminal of the DC power supply circuit, and the output end of the DC power supply circuit is in institute
The power interface connection for stating main control unit, for powering to the main control unit.
Preferably, the DC power supply circuit is direct current 5V power circuits.Further, the direct current 5V power circuits
Including low-power dissipation power supply chip.
Further, the rectifying protective circuit includes filter capacitor, bridge rectifier, overvoltage crowbar and storage
It can capacitance.
Further, the dual-power module further includes electric quantity monitoring module, the sensing power management module and institute
It states sun-generated electric power management module to connect with main control unit by the electric quantity monitoring module respectively, the electric quantity monitoring module energy
Enough to be monitored to the induction power supply, the electricity caused by the sensing power management module cannot be satisfied device requirement
When, power supply circuit can be switched to sun-generated electric power management module by the electric quantity monitoring module, pass through solar-electricity source control
Module is powered equipment.
Further, the short trouble monitoring modular includes sequentially connected measurement current transform er, signal condition electricity
Road and sample circuit.The short trouble monitoring modular, the signal conditioning circuit are respectively set on A, B, C phase power circuit
Including filter capacitor and two electrostatic lightning strike protection pipes, the measurement current transform er is connected by measurement current transform er connector
The both ends of the filter capacitor are connected to, it is in parallel with the filter capacitor after two electrostatic lightning strike protection pipe docking.
Preferably, the sample circuit is A/D sample circuits, and the sample circuit includes I/V translation circuits and A/D conversions
Device.
Specifically, when malfunction monitoring, first by measurement current transform er output current pick-up signal, then pass through measurement
Current transformer connector accesses phase current sensing circuit, filtered capacitor filtering, then is protected by electrostatic lightning strike protection pipe
Afterwards, I/V transformation is carried out, thus obtained differential voltage signal reaches master after being converted to digital signal by difference type A/D converter
Unit is controlled, then operation and analysis are carried out to the digital signal by main control unit, calculates load current and short trouble information.
Further, the ground fault detection module includes sampling unit and signal separation unit, the sampling unit
Including zero sequence current mutual inductor, the sampling unit is used to acquire the magnitude of current and switching resistance that singlephase earth fault circuit occurs
Then the generated magnitude of current passes through the resistance switching signal in signal separation unit acquisition faulty line, quintuple harmonics first half
Wave signal and fundamental wave head half-wave signas, it is by main control unit that resistance switching signal, quintuple harmonics head half-wave signas and fundamental wave is first
Half-wave signa is compared, and judging earth fault, a situation arises.
Specifically, first by the magnitude of current in the sampling unit continuous collecting circuit, when generation singlephase earth fault
When, load resistance is cut since the protective device of substation in network system in the prior art will control resistance switching device, and
Control incision and the frequency for disconnecting load resistance, obtain current waveform signal caused by switching resistance, at this point, can be by described
The magnitude of current caused by the magnitude of current and switching resistance of sampling unit acquisition generation singlephase earth fault circuit, then passes through signal
Separative element is obtained to the exchange fundamental wave in earth fault line and the positive and negative half-wave separation of quintuple harmonics progress occur in transmission system
It is first to quintuple harmonics head half-wave signas, fundamental wave head half-wave signas and resistance switching signal, then by resistance switching signal, quintuple harmonics
Half-wave signa and fundamental wave head half-wave signas are transferred to main control unit, by main control unit to quintuple harmonics head half-wave signas and fundamental wave
First half-wave signa compares and analyzes, and current waveform caused by comparative analysis fundamental waveform and switching resistance simultaneously, works as base
The first half-wave of the positive and negative half-wave of wave respectively with the same phase of first half-wave of the positive and negative half-wave of quintuple harmonics, and fundamental waveform and switching resistance
When generated current waveform is consistent, then judge that singlephase earth fault occurs.By comparison, main control unit makes fault verification,
Failure determination result is indicated finally by fault indication unit.
Further, the wireless communication module includes at least 3G network, 4G networks, Wi-Fi (802.11) network, Wi-
In Max (802.16) network, RS485, TCP/IP, Bluetooth communication, ZigBee-network, frequency hopping spread spectrum (FHSS) radio net
Any one.
Further, the main control unit is using the embedded microprocessor for supporting real-time multi-task operating system.
Fault detector described in the present embodiment is by using sensing power management module and sun-generated electric power management module
The fault detector is powered, on the one hand, avoid so that induction power supply and the shared mutual inductor of measuring circuit, carry
The high measurement accuracy of fault detector；On the other hand, it does not use lithium battery as main power source, is not only conducive to environmental protection, Er Qieli
In the extension of equipment life so that equipment can be run steadily in the long term.In addition, the fault detector described in the present embodiment is using more
Item detection method is combined, and can effectively improve the accuracy rate of earth fault differentiation.
On the basis of embodiment 1, it is contemplated that power circuit is widely distributed, and configuration is complicated, in order to make indicating fault
Device can long-time steady operation, standby battery is set in the fault detector, while by standby battery and the electricity
Amount monitoring modular is connected, and passes through the electric quantity monitoring module so that equipment power supply can be in the sensing power management
Intelligent switching is carried out between module, sun-generated electric power management module and standby battery, preferentially uses the sensing power management
Module is as main power source, under the premise of ensuring equipment stable operation, reduces the frequency of use of accumulator, reduces filling for accumulator
Discharge time extends the service life of accumulator.
Further, storage unit is set in the fault detector, and the storage unit is divided for storing in main control unit
Obtained fault-signal is analysed, the storage unit includes the storage medium of at least one of following storage media types type：
Flash-type, hard disk type, solid magnetic disc (SSD) type, silicon disk driver (SDD) type, multimedia card be miniature, card-type memory (SD
Or XD type of memory), random access memory (RAM) type, static RAM (SRAM) type, read-only memory
(ROM) type, electrically erasable programmable read-only memory (EEPROM) type, programmable read only memory (PROM) type, magnetic memory
Type, magnetic disc type and optical disc type.Preferably, the storage unit uses Flash memory chip.
Further, the fault detector further includes clock chip, and the clock chip is connect with main control unit.When described
Clock chip can work independently of main control unit, and the influence of acceptor's crystal oscillator and its capacitance, does not count fault-signal by date so that main
The historical failure signal that control unit can be detected by the unit records fault detector so that storage unit record is gone through
History fault-signal includes temporal information.Clock chip can ensure under power blackout situation caused by power supply power-fail or other factors really
Protect the timing accuracy of real-time clock.Preferably, clock chip is connect in a parallel fashion with main control unit interface, may make data
Transmission speed is very fast.
The main control unit of herein described fault detector, short trouble monitoring modular, ground fault detection module, failure
Indicating unit, wireless communication module, dual-power module, storage unit and clock chip are the prior art, and the application only will
These modules and/or unit carry out creative connection, existing in the prior art to solve to form new structure and function
Particular problem.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of fault detector, including main control unit and be connected respectively with main control unit short trouble monitoring modular, connect
Earth fault monitoring modular, fault indication unit, wireless communication module and dual-power module；
The dual-power module includes sensing power management module and sun-generated electric power management module, the sensing power management mould
Block includes sequentially connected taking electric current transformer, rectifying protective circuit and DC power supply circuit, the sensing power management mould
Block carries out rectification with after protection by taking electric current transformer to export induced current, to induced current, is provided for fault detector
DC power supply；The sun-generated electric power management module includes solar storage battery plate, and the solar storage battery plate passes through the sun
Energy battery interface is connected with main control unit；
The short trouble monitoring modular includes sequentially connected measurement current transform er, signal conditioning circuit and sample circuit；
The ground fault detection module includes sampling unit and signal separation unit, and the sampling unit is configured as acquisition hair
The magnitude of current caused by the magnitude of current and switching resistance of raw singlephase earth fault circuit, the signal separation unit is used for will be single-phase
Exchange fundamental wave and quintuple harmonics in earth fault line carry out positive and negative half-wave separation, obtain quintuple harmonics head half-wave signas, base
Wave head half-wave signas and resistance switching signal；
The data that the main control unit can be monitored according to the short trouble monitoring modular and ground fault detection module
It is analyzed, fault condition is judged.
2. a kind of fault detector according to claim 1, it is characterised in that：The DC power supply circuit is direct current 5V electricity
Source circuit, the direct current 5V power circuits include low-power dissipation power supply chip.
3. a kind of fault detector according to claim 1, it is characterised in that：The rectifying protective circuit includes filtered electrical
Appearance, bridge rectifier, overvoltage crowbar and storage capacitor.
4. a kind of fault detector according to claim 1, it is characterised in that：The dual-power module further includes electricity prison
Survey module, the sensing power management module and the sun-generated electric power management module respectively by the electric quantity monitoring module with
Main control unit connects.
5. a kind of fault detector according to claim 1, it is characterised in that：The signal conditioning circuit includes filtered electrical
Hold and two electrostatic lightning strike protection pipes, the measurement current transform er are connected to the filter by measurement current transform er connector
The both ends of wave capacitance, it is in parallel with the filter capacitor after two electrostatic lightning strike protection pipe docking.
6. a kind of fault detector according to claim 1, it is characterised in that：The sample circuit is A/D sample circuits,
The sample circuit includes I/V translation circuits and A/D converter.
7. a kind of fault detector according to claim 1, it is characterised in that：The wireless communication module includes at least 3G
Network, 4G networks, Wi-Fi network, Wi-Max networks, RS485, TCP/IP, Bluetooth communication, ZigBee-network, frequency hopping spread spectrum without
Any of line electric network.
8. a kind of fault detector according to claim 1, it is characterised in that：The main control unit is more in real time using supporting
The embedded microprocessor of tasking operating system.
9. a kind of fault detector according to claim 1, it is characterised in that：Setting storage is single in the fault detector
Member, for the storage unit for storing the fault-signal analyzed in main control unit, the storage unit includes following storage
The storage medium of at least one of media type type：Flash-type, hard disk type, solid magnetic disc type, silicon disk driving type, more
Media card is miniature, card-type memory, random access memory type, static RAM type, read-only memory type, electricity can
Erasable programmable read-only memory (EPROM) type, programmable read only memory type, magnetic storage type, magnetic disc type and optical disc type.
10. a kind of fault detector according to claim 1, it is characterised in that：The fault detector further includes clock
Chip, the clock chip are connect in a parallel fashion with the main control unit interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820144422.XU CN207924054U (en) | 2018-01-29 | 2018-01-29 | A kind of fault detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820144422.XU CN207924054U (en) | 2018-01-29 | 2018-01-29 | A kind of fault detector |
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| Publication Number | Publication Date |
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| CN207924054U true CN207924054U (en) | 2018-09-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298287A (en) * | 2018-11-26 | 2019-02-01 | 国网山东省电力公司电力科学研究院 | Small current neutral grounding Distribution Network Failure kind identification method based on fault detector data |
| CN109917704A (en) * | 2019-02-25 | 2019-06-21 | 湖南长高思瑞自动化有限公司 | Fault detector acquisition unit and control method based on STM32L433 low power consumption control device |
| CN110261727A (en) * | 2019-05-09 | 2019-09-20 | 北京信息科技大学 | A kind of fault detector and its working method |
| CN110456215A (en) * | 2019-07-26 | 2019-11-15 | 广州供电局有限公司 | Fault detector is maked somebody a mere figurehead with the power transmission network for driving toy function |
-
2018
- 2018-01-29 CN CN201820144422.XU patent/CN207924054U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298287A (en) * | 2018-11-26 | 2019-02-01 | 国网山东省电力公司电力科学研究院 | Small current neutral grounding Distribution Network Failure kind identification method based on fault detector data |
| CN109298287B (en) * | 2018-11-26 | 2021-03-02 | 国网山东省电力公司电力科学研究院 | Fault indicator data-based method for identifying fault type of low-current grounding distribution network |
| CN109917704A (en) * | 2019-02-25 | 2019-06-21 | 湖南长高思瑞自动化有限公司 | Fault detector acquisition unit and control method based on STM32L433 low power consumption control device |
| CN110261727A (en) * | 2019-05-09 | 2019-09-20 | 北京信息科技大学 | A kind of fault detector and its working method |
| CN110456215A (en) * | 2019-07-26 | 2019-11-15 | 广州供电局有限公司 | Fault detector is maked somebody a mere figurehead with the power transmission network for driving toy function |
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