CN206945928U - Fault detect positioner is scurried into a kind of Portable exchange - Google Patents
Fault detect positioner is scurried into a kind of Portable exchange Download PDFInfo
- Publication number
- CN206945928U CN206945928U CN201720149362.6U CN201720149362U CN206945928U CN 206945928 U CN206945928 U CN 206945928U CN 201720149362 U CN201720149362 U CN 201720149362U CN 206945928 U CN206945928 U CN 206945928U
- Authority
- CN
- China
- Prior art keywords
- exchange
- scurried
- signal
- module
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The equipment that major part alters electric fault detection for exchange at present is all the fixedly mounted mode of sampling, but fixed installation can not judge and navigate to specific trouble point.Also it is that exchange is scurried into failure as common earth fault to have part movable type grounding fault searching instrument device, and malfunction elimination is carried out by way of injecting a low frequency signal.The utility model belongs to technical field of electric power detection, fault detect positioner is scurried into specifically a kind of Portable exchange, including host signal source, hand-held detector, situation is scurried into host signal source for monitoring straight-flow system with the presence or absence of exchange, display straight-flow system voltage and alternating component component, issues data message to hand-held detector；Hand-held detector carries out exchange according to the data message received and scurries into trouble point investigation.The utility model uses on-fixed mounting means, can be moved using the mounting structure of Portable and search trouble point, and navigates to specific generation exchange and scurry into the position of fault.
Description
Technical field
The utility model belongs to technical field of electric power detection, and specifically a kind of Portable exchange is scurried into fault detect and determined
Position device.
Background technology
DC power system is the system that electrical source of power is provided to protection, and how its stability, reliability directly affects
The working condition of protection.Wherein exchange scurry into DC power system be influence DC power system stability, reliability it is main
One of failure, it can directly result in false protection, so as to produce the serious system failure.The country has a lot for exchange at present
DC power system alarm and the related technical scheme such as device, patent and the periodical of route selection are scurried into, such as：Transformer station hands over
Flee into dc source warning device（CN201220534548.0）, a kind of exchange of transforming plant DC power-supply system scurry into early warning
Supervising device（201310698981.7）, non-implanted formula DC system earth fault lookup method and its device
（201310513399.9）Deng, but already present product and the most of DC power system insulating monitoring of technical scheme at present
Device is to be not equipped with the detection function that exchange is scurried into；A small number of Insulation Inspection Device for Direct-Current System is that possessed exchange to scurry into
The function of alarm and route selection, AC wave shape recording can also be carried out, but simply simply there is monitoring exchange to scurry into straight-flow system
Failure, and alarm and route selection function, and route selection function is also that can only determine that exchange is altered electric fault and occurred on a certain feeder line,
It can not determine that the specific position on feeder line occurs for failure, this can exclude and handle to field failure to bring very big difficulty.
Although also having the similar portable grounding fault equipment of partial function at present, the side using Injection Signal is substantially
Formula.
It can be seen that existing product and technology have the shortcomings that being primarily present from foregoing description：
First, current most product or technical scheme are to possess to scurry into exchange the progress of DC power system failure
Monitoring and the function of route selection, are all fixedly mounted modes, and no method determines to arrive specific trouble point.
Second, portion portable grounding fault equipment is substantially the principle using Injection Signal, and exchange is scurried into
Failure is handled as common earth fault mode.
The content of the invention
In order to solve the above problems, the utility model provides a kind of Portable exchange and scurries into fault detect positioning dress
Put, concrete technical scheme is as follows：
Fault detect positioner is scurried into a kind of Portable exchange, it is characterised in that：Including host signal source, hold
Detector；The host signal source include partial pressure sampling unit, isolated location, amplifier circuit unit, AD sampling units, at MCU
Manage unit, data storage cell, output unit；The partial pressure sampling unit includes alternating message source, resistance R1, resistance R2, electricity
Hinder R3；The AC signal source frequency is 50Hz, for producing AC signal；The isolated location includes electric capacity C, Phototube Coupling
Circuit；The photoelectric isolating circuit includes isolation linear optical coupling；The isolation linear optical coupling is 8 times of amplification relations；The amplification
Circuit unit includes low-pass amplifier；The AC signal is input to electric capacity C, Ran Houjing after resistance R1, resistance R2 partial pressures
Sequentially input after resistance R3 samplings to photoelectric isolating circuit, amplifier circuit unit, AD sampling units, MCU processing units；The friendship
Stream signal is divided into two paths of signals after the output of MCU processing unit processes, and signal is input to memory cell and stored all the way, separately
Signal is input to output unit all the way；The hand-held detector includes forcipated mutual-inductor, filtering and amplifying circuit module, AD sampling moulds
Block, wireless receiving module, primary processor MCU module, display module, alarm output module；The forcipated mutual-inductor detection exchange
Detected signal is simultaneously sequentially inputted to filtering and amplifying circuit module, AD sampling modules, primary processor MCU moulds by trouble point
Block；The hand-held detector is received by wireless receiving module to be exported the data message sent from host signal source and is input to
Primary processor MCU module；The primary processor MCU module samples mould to the data message that is exported from wireless receiving module and from AD
The signal of block output, which is calculated, scurries into failure with judging whether to exchange, and the electric current of the signal is shown by display module
Waveform, while exported by alarm output module and scurry into failure with the presence or absence of exchange.
Further, the AD sampling units sample using 12 A/D chips, reference voltage 2.5V.
Further, the output unit includes wireless output module, liquid crystal display display module.
Further, the resistance R1, resistance R2 value parameter are 500k/1W, and resistance R3 value parameter is 190 Europe
Nurse, electric capacity C value parameter is 105/400V, and the multiplication factor of amplifier circuit unit is 40 times.
Further, what the MCU processing units, primary processor MCU module selected is the STM32 series monolithics of ST companies
As CPU；The MCU processing units carry out Fourier transformation using fft algorithm to the digital signal sequences sampled.
Further, the display module includes LCDs；The alarm output module includes voice message.
Further, the hand-held detector is received the data sent from host signal source by wireless receiving module and believed
Breath, hand-held detector only need to be communicated once with host signal source, and the communication context of the communication is within 10 meters, searches and hands over
It is unrestricted to flee hand-held detector and the distance in host signal source in electric fault point process.
Further, the MCU processing units, primary processor MCU module use STM32 series monolithics as CPU, system
Clock is 72M, single command cycle minimum 13.9nS；50Hz AC signal each cycle gathers 40 data, each hits
According to interval 0.5mS, the AC signal waveform that can be scurried into being recorded in 60mS, pre-warning time is less than 0.2S.
The beneficial effects of the utility model are：
1st, the different voltage levels direct current power supplys of the utility model 220V/110V/48V etc. suitable for transformer station or power plant
System；
2nd, the utility model can detect the exchanges of various amplitudes within 0V to 285V and scurry into failure；
3rd, the utility model can to exchange moment scurry into DC power system monitoring alarm time be less than 0.2 second, and
Carry out AC wave shape recording；
4th, the utility model can to scurrying into the fault branch of exchange, specific trouble point positions, portable lookup side
Formula can be with faster discovery trouble point and timely processing failure；
5th, the utility model uses non-implanted signal principle, directly detects the AC signal scurried into, will not be to dc source
System has any impact；
6th, in the case that the exchange for resistive occurs is scurried into, the utility model is according to the alternating voltage amplitude scurried into
Size, automatically select and suitable capacitive load is put between dc source bus and the earth, can so reduce AC power
The alternating-current magnitude of DC power system is scurried into, scurrying into failure because of AC power so as to lowering DC power system causes to protect
The risk of malfunction.
7th, the utility model is advantageous to be lifted the DC power system operation and management level of transformer station or power plant, is advantageous to carry
High transformer station or electric power factory equipment operational reliability, prevent malfunction, reduce severe and great casualty, create infusion of financial resources higher
Economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is host signal source of the present utility model theory structure schematic diagram；
Fig. 2 is host signal source of the present utility model concrete structure schematic diagram；
Fig. 3 is hand-held detector theory structure schematic diagram of the present utility model.
Embodiment
In order to be better understood from the utility model, below in conjunction with the accompanying drawings and embodiment is done furtherly to the utility model
It is bright：
Fault detect positioner is scurried into a kind of Portable exchange includes host signal source, hand-held detector, main frame
Signal source is used to monitoring straight-flow system scurries into situation with the presence or absence of exchange, display straight-flow system voltage and alternating component component, under
Data message is sent out to hand-held detector；Hand-held detector carries out exchange according to the data message received and scurries into trouble point investigation.
As shown in figure 1, host signal source includes partial pressure sampling unit, isolated location, amplifier circuit unit, AD sampling lists
Member, MCU processing units, output unit, data storage cell, wherein output unit include wireless output module, liquid crystal display is shown
Module.50Hz ac supply signal is input to electric capacity C after resistance R1, resistance R2 partial pressures, then after resistance R3 samplings
Sequentially input to photoelectric isolating circuit, signal and be amplified processing by amplifying circuit again, then by 12 high-precision A/D chips
After sampling conversion, by MCU analyzing and processing datas.Straight-flow system, i.e. outputting alarm are scurried into the event of exchange of the amplitude more than 10V
Information, branch road route selection, and store AC signal Wave data.
The concrete structure schematic diagram in host signal source is as shown in Fig. 2 the sampling line of straight-flow system is connected to shown in Fig. 2
On sampling terminal, when AC power be present and scurry into straight-flow system, after carrying out partial pressure sampling by resistance R1, R2, sampling letter
Number simultaneously there is AC compounent and DC component, the characteristic of the logical exchange stopping direct current of electric capacity is recycled, DC component is isolated, is led to
Cross electric capacity C only AC compounent.Then high pressure and low-pressure section are separated by resistance R3 samplings, photoelectric isolating circuit, from
And improve the security of system and device, stability；A low-pass amplifier is designed in amplifier circuit unit part so that be
System improves the antijamming capability for higher hamonic wave on hardware.Signal after amplification is directly entered the ultra high speed A/D conversion of 12
Device, it is converted into data signal and inputs to CPU processing.CPU enters by using fft algorithm to the digital signal sequences sampled
Row Fourier transform, the frequency spectrum of 50Hz AC signal is extracted, by calculating the amplitude Characteristics amount of the AC signal,
The size for scurrying into alternating voltage is judged so as to realize, while avoids the influence of other interference signals.Adopt in real time in host signal source
Sample monitors the safe operation of DC power system, can detect the exchange moment within 285V and scurry into, record and scurry into 60 milliseconds
AC signal waveform, pre-warning time is less than 0.2 second, and issues data to hand-held detector.
AD sampling units are using 12 high-precision AD conversion chips, and its reference voltage is 2.5V, therefore the AD of 12
The resolution ratio of conversion chip is 0.6mV.Resistance R1, resistance R2 parameters are all 500k/1W, and electric capacity C is that 105/400V i.e. capacitive reactance is
3.18k, resistance R3 are 190 ohm, and the isolation linear optical coupling of photoelectric isolating circuit is 8 times of amplification relations, and amplifying circuit uses 40
Times amplifying circuit, ensures that the virtual value of 285V AC signal signal at AD samplings after processing of circuit is not more than 2.5V,
Signal virtual value of the AC signal that virtual value is 0.1V in the case of so according to desired proportions at AD samplings be
0.877mV.Therefore straight-flow system is scurried into the exchange within 285V, has been for the AD sampling A/D chips that resolution ratio is 0.6mV
It can capture entirely.
MCU processing units select the STM32 series monolithics of ST companies as CPU, the survey that CPU is uploaded by monitoring MCU
Amount data are analyzed and processed, and judge currently to scurry into DC power system with the presence or absence of exchange, if scurrying into failure in the presence of exchange,
CPU reports failure by warning circuit, and clock unit circuit provides temporal information, and the wireless mould for passing through output unit for device
Block issues parameter to hand-held detector.STM32 family chip system clocks are up to 72M, single command cycle minimum 13.9nS.50Hz
Cycle of AC signal be 20mS, it is only necessary to gathering a complete periodic signal can be calculated by Fourier transform method
Go out its amplitude.Each cycle gathers 40 data, and each sampled data is at intervals of 0.5mS.Utilize 0.5mS sampling interval logarithm
According to being calculated and added up, therefore the calculating of alternating voltage amplitude can be completed within 20mS cycle, it is right again after alarm output
Data waveform carries out storage processing, so for system clock is up to 72M STM32 family chips, it is ensured that to week
Phase is that 20mS AC signal measures calculating and the alarm output in 200mS.
As shown in figure 3, hand-held detector includes forcipated mutual-inductor, filtering and amplifying circuit module, AD sampling modules, wirelessly connect
Module, primary processor MCU module, display module, alarm output module are received, wherein display module includes liquid crystal display display unit,
Alarm output module includes voice message.First, hand-held detector is received from host signal source by wireless receiving module
Data, startup hand-held detector carry out exchange and scurry into trouble point detection work.Hand-held detector only needs to carry out with host signal source
Data communication, communication are in the range of 10 meters, just search exchange without communicating after the completion of communication and alter electric fault
Hand-held detector and the distance in host signal source are unrestricted in point process.Feeder line is detected with the presence or absence of friendship by forcipated mutual-inductor
Signal code is flowed, after amplification filters, then AD samplings is carried out, is then calculated by primary processor MCU and judge whether to deposit
Failure is scurried into exchange, and shows the current waveform signal on the feeder line on a display screen, while voice output prompt message, it is
No have exchange and scurry into failure.
The STM32 series monolithics of the primary processor MCU module selection ST companies of hand-held detector pass through pincers as CPU
Shape transformer detects DC power system feeder line and whether there is AC signal current in real time, then passes through primary processor MCU module
Technology with judge to scurry into failure with the presence or absence of exchanging at this.
The equipment that electric fault detection is altered for exchange most of at present is all the fixedly mounted mode of sampling, can be to exchange
Alter electric fault to be detected and positioned, but failure can only be determined to certain all the way on feeder line, can not judge due to being fixedly mounted and
Navigate to specific trouble point.Also it is that exchange is scurried into failure as common ground connection to have part movable type grounding fault searching instrument device
Failure, malfunction elimination is carried out by way of injecting a low frequency signal.And the utility model is non-fixed installation mode, use
Non-implanted signal principle, alternating current directly whether there is by forcipated mutual-inductor detecting system feeder line, utilize Portable
Mounting structure can move and search trouble point, and navigate to and specific exchange occurs scurry into the position of fault.
The utility model is not limited to above-described embodiment, the foregoing is only of the present utility model preferable
Case study on implementation, not to limit the utility model, all made within spirit of the present utility model and principle are any
Modifications, equivalent substitutions and improvements etc., should be included within the scope of protection of the utility model.
Claims (8)
1. fault detect positioner is scurried into a kind of Portable exchange, it is characterised in that：Including host signal source, hand-held spy
Survey device；The host signal source includes partial pressure sampling unit, isolated location, amplifier circuit unit, AD sampling units, MCU processing
Unit, data storage cell, output unit；The partial pressure sampling unit includes alternating message source, resistance R1, resistance R2, resistance
R3；The AC signal source frequency is 50Hz, for producing AC signal；The isolated location includes electric capacity C, Phototube Coupling electricity
Road；The photoelectric isolating circuit includes isolation linear optical coupling；The isolation linear optical coupling is 8 times of amplification relations；The amplification electricity
Road unit includes low-pass amplifier；The AC signal is input to electric capacity C after resistance R1, resistance R2 partial pressures, then through electricity
Sequentially input after resistance R3 samplings to photoelectric isolating circuit, amplifier circuit unit, AD sampling units, MCU processing units；The exchange
Signal is divided into two paths of signals after the output of MCU processing unit processes, and signal is input to memory cell and stored all the way, another
Road signal is input to output unit；The hand-held detector includes forcipated mutual-inductor, filtering and amplifying circuit module, AD sampling moulds
Block, wireless receiving module, primary processor MCU module, display module, alarm output module；The forcipated mutual-inductor detection exchange
Detected signal is simultaneously sequentially inputted to filtering and amplifying circuit module, AD sampling modules, primary processor MCU moulds by trouble point
Block；The hand-held detector is received by wireless receiving module to be exported the data message sent from host signal source and is input to
Primary processor MCU module；The primary processor MCU module samples mould to the data message that is exported from wireless receiving module and from AD
The signal of block output, which is calculated, scurries into failure with judging whether to exchange, and the electric current of the signal is shown by display module
Waveform, while exported by alarm output module and scurry into failure with the presence or absence of exchange.
2. fault detect positioner is scurried into a kind of Portable exchange according to claim 1, it is characterised in that：Institute
State AD sampling units to sample using 12 A/D chips, reference voltage 2.5V.
3. fault detect positioner is scurried into a kind of Portable exchange according to claim 1, it is characterised in that：Institute
Stating output unit includes wireless output module, liquid crystal display display module.
4. fault detect positioner is scurried into a kind of Portable exchange according to claim 1, it is characterised in that：Institute
State resistance R1, resistance R2 value parameter is 500k/1W, resistance R3 value parameter is 190 ohm, electric capacity C value parameter
For 105/400V, the multiplication factor of amplifier circuit unit is 40 times.
5. fault detect positioner is scurried into a kind of Portable exchange according to claim 1, it is characterised in that：Institute
State MCU processing units, primary processor MCU module selection is the STM32 series monolithics of ST companies as CPU；At the MCU
Reason unit carries out Fourier transformation using fft algorithm to the digital signal sequences sampled.
6. fault detect positioner is scurried into a kind of Portable exchange according to claim 1, it is characterised in that：Institute
Stating display module includes LCDs；The alarm output module includes voice message.
7. fault detect positioner is scurried into a kind of Portable exchange according to claim 1, it is characterised in that：Institute
State hand-held detector and the data message sent from host signal source, hand-held detector and main frame are received by wireless receiving module
Signal source only need to be communicated once, and the communication context of the communication is within 10 meters, searches exchange and alters in electric fault point process
Hand-held detector and the distance in host signal source are unrestricted.
8. fault detect positioner is scurried into a kind of Portable exchange according to claim 1 or 5, its feature exists
In：The MCU processing units, primary processor MCU module are using STM32 series monolithics as CPU, system clock 72M, list
Instruction cycle minimum 13.9nS；50Hz AC signal 40 data of each cycle collection, each sampled data interval 0.5mS,
The AC signal waveform that can be scurried into being recorded in 60mS, pre-warning time are less than 0.2S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720149362.6U CN206945928U (en) | 2017-02-20 | 2017-02-20 | Fault detect positioner is scurried into a kind of Portable exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720149362.6U CN206945928U (en) | 2017-02-20 | 2017-02-20 | Fault detect positioner is scurried into a kind of Portable exchange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206945928U true CN206945928U (en) | 2018-01-30 |
Family
ID=61356938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720149362.6U Active CN206945928U (en) | 2017-02-20 | 2017-02-20 | Fault detect positioner is scurried into a kind of Portable exchange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206945928U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707196A (en) * | 2017-02-20 | 2017-05-24 | 广西电网有限责任公司北海供电局 | Portable mobile alternating current intrusion fault detection and positioning device |
| CN113075534A (en) * | 2021-03-31 | 2021-07-06 | 维沃移动通信有限公司 | Power chip detection circuit, power chip detection method and device and electronic equipment |
| CN114217241A (en) * | 2021-11-22 | 2022-03-22 | 国网山西省电力公司晋中供电公司 | Method, system and device for detecting power leakage fault and storage medium |
-
2017
- 2017-02-20 CN CN201720149362.6U patent/CN206945928U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707196A (en) * | 2017-02-20 | 2017-05-24 | 广西电网有限责任公司北海供电局 | Portable mobile alternating current intrusion fault detection and positioning device |
| CN113075534A (en) * | 2021-03-31 | 2021-07-06 | 维沃移动通信有限公司 | Power chip detection circuit, power chip detection method and device and electronic equipment |
| WO2022206646A1 (en) * | 2021-03-31 | 2022-10-06 | 维沃移动通信有限公司 | Power source chip testing circuit, power source chip testing method and apparatus, and electronic device |
| CN114217241A (en) * | 2021-11-22 | 2022-03-22 | 国网山西省电力公司晋中供电公司 | Method, system and device for detecting power leakage fault and storage medium |
| CN114217241B (en) * | 2021-11-22 | 2023-08-22 | 国网山西省电力公司晋中供电公司 | Method, system, device and storage medium for detecting power-on fault |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106707196A (en) | Portable mobile alternating current intrusion fault detection and positioning device | |
| CN103135038B (en) | Straight-flow system exchanges crosstalk and insulation fault monitoring selection method | |
| CN203241494U (en) | Direct current system AC series current fault and insulation fault monitoring line-selection apparatus | |
| CN202886463U (en) | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection | |
| CN206945928U (en) | Fault detect positioner is scurried into a kind of Portable exchange | |
| CN1316256C (en) | Electric network geomagnetic induction current monitoring method and apparatus | |
| CN106786467B (en) | Fault warning and device for preventing unwanted operation are scurried into a kind of exchange | |
| CN202886514U (en) | Direct current (DC) system grounding detector | |
| CN201218822Y (en) | Electric energy quality on-line monitoring device | |
| CN106771933A (en) | Power cable shelf depreciation high frequency electric monitoring system based on wireless network | |
| CN203444063U (en) | Inspection and alarm apparatus for AC mixing and DC grounding | |
| CN203396920U (en) | Handheld alternating-current and direct-current circuit connection error monitoring and alarming device | |
| CN203324380U (en) | Direct-current source system insulation monitoring apparatus and monitoring host thereof | |
| CN104330612A (en) | Resonant overvoltage monitoring system and method | |
| CN205157637U (en) | Generator carbon brush current distribution monitoring system | |
| CN112614020A (en) | Electric propulsion state evaluation system based on electric energy quality | |
| CN103795145A (en) | Distributed power supply node real-time monitoring and analyzing system device and analyzing method | |
| CN105548846A (en) | Signal frequency conversion preposition module of portable intelligent four-channel partial discharge detector | |
| CN203811737U (en) | Direct-current electric-leakage monitoring and warning device | |
| CN203658521U (en) | Mobile insulation supervision instrument of transformer station DC system | |
| CN202502190U (en) | Labview-based fault detecting and positioning device for frequency-shift transmission line | |
| CN206533133U (en) | Fault warning and device for preventing unwanted operation are scurried into one kind exchange | |
| CN107666141A (en) | A kind of alternating current-direct current for direct-flow distribution system is being got lines crossed default detection and protection device | |
| CN203632664U (en) | Portable fault detector for remote power-collecting system equipment | |
| CN103558432A (en) | High-voltage direct connection type electricity stealing detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |