CN106093543B - Direct current cables leakage current electrification detection system - Google Patents
Direct current cables leakage current electrification detection system Download PDFInfo
- Publication number
- CN106093543B CN106093543B CN201610398869.5A CN201610398869A CN106093543B CN 106093543 B CN106093543 B CN 106093543B CN 201610398869 A CN201610398869 A CN 201610398869A CN 106093543 B CN106093543 B CN 106093543B
- Authority
- CN
- China
- Prior art keywords
- current
- signal
- control circuits
- analog signal
- modules
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A kind of direct current cables leakage current electrification detection system, including low current sensor, differential amplification and filter module, A/D modules, DSP control circuits, display module and communication module；The current analog signal detected is transmitted to differential amplification and filter module by low current sensor；Differential amplification and filter module generate amplified analog signal transmission to A/D modules；A/D modules are digital data transmission to DSP control circuits；DSP control circuits carry out processing to digital signal and generate control signal and transmission signal, and control signal feeds back to differential amplification and filter module；DSP control circuits show that DSP control circuits are communicated by communication module by signal is transmitted by display module by signal is transmitted.The present invention can effectively, reliably detect the state of insulation of direct current cables system, to ensureing that power grid power supply safety is significant.
Description
Technical field
The present invention relates to cable insulation detections, in particular to a kind of direct current cables leakage current electrification detection system.
Background technology
In order to reduce influence of the greenhouse effects to weather, the whole world just in extensive development green energy resource, exploitation solar energy,
Wind energy and tidal power generation etc..Wind-power electricity generation, tidal power generation, solar power generation etc. can be had unstable power supply by direct current transportation
It is linked up with electric system and the power quality for not interfering with power grid is horizontal.
HVDC transmission line is at low cost, loss is small, no reactive power, it is easy to connect, be easy to control and adjust, from
And it is widely adopted in long distance powedr transmission.In addition, the working field strength of insulation DC electric cable insulation is high, insulation thickness
It is thin, the outside diameter of cable is small, light-weight, manufacture installation is easy, current-carrying capacity is big, no alternating current magnetic field, has advantage in terms of environmental protection.Cause
This, direct current high tension transmission cable is the important topic in high voltage power transmission as a part indispensable in DC transmission system.
For opposite AC electric power systems, the research of high voltage DC power cable is lag.It is tried in high voltage direct current cable
Test with insulation diagnosis technical aspect, have standard specified in cable testing project it is few.Lack in the prior art as a result, straight
The state of insulation live detection means for flowing cable system, therefore, it is necessary to according to direct current cables system structure, propose that direct current cables is let out
Leakage current electrification detection system can effectively, reliably detect the state of insulation of direct current cables system, to ensureing power grid power supply
Safety is significant.
Invention content
Present invention aim to the problems in for the above-mentioned prior art, provide a kind of direct current cables leakage current band
Electricity detecting system can effectively, reliably detect the state of insulation of direct current cables system, to ensureing that power grid power supply safety has weight
Want meaning.
To achieve the above object, the direct current cables leakage current electrification detection system designed by the present invention, special character
It is：Including low current sensor, differential amplification and filter module, A/D modules, DSP control circuits, display module and communication mould
Block；The current analog signal detected is transmitted to differential amplification and filter module by the low current sensor；The difference is put
Big and filter module receives current analog signal, and the amplified mould of generation is filtered and amplified to the current analog signal
Quasi- signal, and it is transmitted to A/D modules；The A/D modules are converted to digital signal after receiving amplified analog signal, and pass
Transport to DSP control circuits；The DSP control circuits carry out processing to digital signal and generate control signal and transmission signal, described
Control signal feeds back to differential amplification and filter module；The DSP control circuits are shown by display module by signal is transmitted
Show, the DSP control circuits are communicated by communication module by signal is transmitted.
Further, the current analog signal includes direct current cables leakage current analog signal and geoinduction current-mode
Quasi- signal；The low current sensor includes the first low current sensor and the inspection for detecting direct current cables leakage current analog signal
Survey the second low current sensor of geoinduction current analog signal；First low current sensor along direct current cables ontology or
It is grounded axis direction to be mounted on direct current cables ontology or ground wire, second low current sensor and the first micro-current pass
Sensor direction is consistently remotely from the grounding body of cable body.
Further, the low current sensor is open type structure.
Still further, the detection sensitivity of the low current sensor is microampere order.
In the above-mentioned technical solutions, the differential amplification and filter module, A/D modules and DSP control circuits are all by power supply
Module for power supply.
In the above-mentioned technical solutions, the low current sensor, differential amplification and filter module, A/D modules, DSP controls
Circuit, display module and communication module are an integral structure.
In direct current cables leakage current electrification detection system designed by the present invention, low current sensor is that one kind can be with
The sensor for detecting microampere class precision weak current, is a kind of sensor based on magnetic strength effect, the analog signal warp of output
It crosses differential amplification and filter module enters A/D modules and is digitally converted, then arrive DSP control circuits.According to different voltages etc.
The direct current cables circuit of grade, be arranged the corresponding amplification factor of differential amplification and filter module by software, the micro- electricity of Indirect method
The detection range of flow sensor, to adapt to the range of different voltages grade direct current cables leakage current.
Differential amplification and filter module are used to carry out signal amplitude adjustment to the detection signal of low current sensor, keep its defeated
The analog signal gone out is in the detection range ability of A/D modules.Low current sensor is passed including the first micro-current in the present invention
Sensor and the second low current sensor, differential amplification and filter module are simultaneously to direct current cables leakage current analog signal and the earth
Induced current analog signal carries out differential amplification and filtering interference signals.The design of two low current sensors has preferably inspection
Survey reliability.Above-mentioned two sensor is open type structure, can be installed under the conditions of not removing cable run in this way,
And the sensitivity of two sensors is all microampere order.
The DSP control circuits are a kind of special microprocessors, are mainly handled digital signal.Operation principle is
0,1 digital signal received is shown, is communicated, and according to actual test environment adjust automatically differential amplification and filtering mould
The analog signal of block detection, can realize switching of the signal on different ranges.DSP control circuits have powerful data processing
Function and the higher speed of service, can be programmed according to demand, and can quickly be located by instruction to the mass data of detection
Reason.
The power module is used to provide power supply for differential amplification and filter module, A/D modules and DSP control circuits.It will
The low current sensor, differential amplification and filter module, A/D modules, DSP control circuits, display module and communication module are set
It is calculated as integral structure, such structure facilitates technical staff to communicate and handle in detection.In addition integral type of the present invention
Structure be also more suitable for being designed as handheld device, be convenient for carrying.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific implementation mode of the present invention.
As shown in Figure 1, direct current cables leakage current electrification detection system of the present invention, is sensed by the first micro-current
Device, the second low current sensor, differential amplification and filter module, A/D modules, DSP control circuits, display module, communication module
It is formed with power module, and above-mentioned component is in integral structure.First low current sensor is along direct current cables ontology or connects
Ground wire axis direction is mounted on direct current cables ontology or ground wire, the second low current sensor and the first low current sensor side
To being consistently remotely from the grounding body of cable body.The direct current cables leakage current that first low current sensor detects
The geoinduction current analog signal that analog signal and the second low current sensor detect is sent to differential amplification and filtering mould
Block.First low current sensor and the second low current sensor are open type structure, and cable run is not being removed in realization
Under the conditions of installed, and its detection sensitivity be microampere order.
The differential amplification and filter module are unidirectionally connected to A/D modules, are put what differential amplification and filter module generated
Analog signal after big is transmitted to A/D modules and is digitally converted.The A/D modules are unidirectionally connected to DSP control circuits, will
The digitized signal of A/D modules output is transmitted to DSP control circuits.The DSP control circuits be unidirectionally connected to display module with
Communication module, display module show the transmission signal of DSP control circuits, and communication module is by the transmission of DSP control circuits
Signal is communicated.The control signal that the DSP control circuits generate feeds back to differential amplification and filter module.
The power module is differential amplification filter module, A/D modules and DSP control circuits provide power supply.
The detailed process that the present invention works is：
(1) the first low current sensor is mounted on direct current cables ontology or ground wire, detection direct current cables leakage electricity
Flow field simulation signal；Second low current sensor is placed on the grounding body far from cable body, geoinduction current-mode is detected
Quasi- signal.
(2) signal amplification and difference filter are carried out to above-mentioned two-way current analog signal by differential amplification and filter module
Wave；
If above-mentioned two-way current analog signal value range is in the detection range ability of A/D modules, directly by two-way
Current analog signal is transferred to A/D modules by differential amplification and filter module；If any current analog signal value range is small
In or more than A/D modules detection range ability, then it is enlarged or reduced A/D modules by differential amplification and filter module
Detection range ability in after be transferred to A/D modules.
(3) current analog signal received is digitally converted by A/D modules.
(4) display module and communication module are transported to the digital signal after conversion by DSP control circuits, are shown
And communication.
(5) according to the signal that display module is shown send new instruction to DSP control circuits and feed back to differential amplification and
Filter module.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (5)
1. a kind of direct current cables leakage current electrification detection system, it is characterised in that：Including low current sensor, differential amplification and
Filter module, A/D modules, DSP control circuits, display module and communication module；
The current analog signal detected is transmitted to differential amplification and filter module by the low current sensor；
The differential amplification and filter module receive current analog signal, and the current analog signal is filtered and is amplified
Amplified analog signal is generated, and is transmitted to A/D modules；
The A/D modules are converted to digital signal after receiving amplified analog signal, and are transmitted to DSP control circuits；
The DSP control circuits carry out processing to digital signal and generate control signal and transmission signal, the control signal feedback
To differential amplification and filter module；The DSP control circuits show that the DSP is controlled by display module by signal is transmitted
Circuit processed is communicated by communication module by signal is transmitted；
The current analog signal includes direct current cables leakage current analog signal and geoinduction current analog signal；
The low current sensor includes the first low current sensor and the detection for detecting direct current cables leakage current analog signal
Second low current sensor of geoinduction current analog signal；
First low current sensor is mounted on direct current cables ontology along direct current cables ontology or ground wire axis direction or connects
On ground wire, second low current sensor is consistently remotely from connecing for cable body with the first low current sensor direction
On ground body；
The low current sensor is open type structure.
2. direct current cables leakage current electrification detection system according to claim 1, it is characterised in that：The micro-current passes
The detection sensitivity of sensor is microampere order.
3. direct current cables leakage current electrification detection system according to claim 1 or 2, it is characterised in that：The difference
Amplification and filter module, A/D modules and DSP control circuits are all powered by power module.
4. direct current cables leakage current electrification detection system according to claim 1 or 2, it is characterised in that：Micro- electricity
Flow sensor, differential amplification and filter module, A/D modules, DSP control circuits, display module and communication module are integral type knot
Structure.
5. direct current cables leakage current electrification detection system according to claim 3, it is characterised in that：The micro-current
Sensor, differential amplification and filter module, A/D modules, DSP control circuits, display module and communication module are an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398869.5A CN106093543B (en) | 2016-06-07 | 2016-06-07 | Direct current cables leakage current electrification detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398869.5A CN106093543B (en) | 2016-06-07 | 2016-06-07 | Direct current cables leakage current electrification detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106093543A CN106093543A (en) | 2016-11-09 |
| CN106093543B true CN106093543B (en) | 2018-09-14 |
Family
ID=57227360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610398869.5A Active CN106093543B (en) | 2016-06-07 | 2016-06-07 | Direct current cables leakage current electrification detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106093543B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018165970A1 (en) * | 2017-03-17 | 2018-09-20 | 浙江巨磁智能技术有限公司 | Leakage current sensor, and apparatus for monitoring leakage current |
| CN107492870A (en) * | 2017-08-16 | 2017-12-19 | 国网浙江省电力公司杭州供电公司 | A kind of cable leakage detection control apparatus |
| CN108872696A (en) * | 2018-01-09 | 2018-11-23 | 国网山东省电力公司滨州供电公司 | A kind of leakage current circuit measuring high voltage iron tower tester |
| CN108614184A (en) * | 2018-06-06 | 2018-10-02 | 浙江巨磁智能技术有限公司 | Electric vehicle combined type leakage current sensing device |
| CN109884369A (en) * | 2019-01-28 | 2019-06-14 | 广州炫通电气科技有限公司 | A kind of 8 channel voltage of high-speed, high precision, 8 channel current sampling system |
| CN110146738A (en) * | 2019-06-03 | 2019-08-20 | 上海采日能源科技有限公司 | Electric current measures device and method and energy-storage system |
| CN111679114A (en) * | 2020-04-24 | 2020-09-18 | 国网江苏省电力有限公司营销服务中心 | Direct current on-line measuring device for distributed energy efficiency calibration |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2629047Y (en) * | 2002-12-30 | 2004-07-28 | 哈尔滨工程大学 | Computer testing electric machine system |
| CN203849322U (en) * | 2014-05-07 | 2014-09-24 | 南京信息工程大学 | Low voltage power supply surge protector resistive current monitoring device |
| JP6067628B2 (en) * | 2014-07-23 | 2017-01-25 | リンナイ株式会社 | Control device |
| CN204666729U (en) * | 2015-05-25 | 2015-09-23 | 国家电网公司 | A kind of capacitive apparatus medium loss measuring device with electricity |
| CN105158543B (en) * | 2015-09-23 | 2018-10-30 | 红相股份有限公司 | Based on double Hall elements to the collecting unit of UHVDC Arrester leakage current |
| CN105116296B (en) * | 2015-10-12 | 2018-09-21 | 国家电网公司 | The special fault detector of grid cable run |
-
2016
- 2016-06-07 CN CN201610398869.5A patent/CN106093543B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106093543A (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106093543B (en) | Direct current cables leakage current electrification detection system | |
| CN103770911B (en) | A kind of deep-sea observation buoyage based on induction coupling and communication technology of satellite | |
| US11137507B2 (en) | Near-sea-bottom hydrate detection system | |
| MX2013000743A (en) | Sensing and control electronics for a power grid protection system. | |
| RU2012123514A (en) | DIRECTED DETECTED RESISTIVE CIRCUIT TO GROUND AND RIP OF THE MEDIUM VOLTAGE CONDUCTOR | |
| KR101124511B1 (en) | Photovoltaic array monitoring apparatus | |
| CN102435907A (en) | Polarity test method for electronic current transformer | |
| CN105319570B (en) | A kind of pipe detector tracks of device | |
| CN105606897A (en) | Branch insulating impedance monitoring and PV power generation method, inverter and PV power generation system | |
| CN206223727U (en) | The lossless telemetering equipment of overhead ground wire electromagnetism | |
| CN105634131A (en) | Remote intelligent environment monitoring alarm device for power line | |
| CN205246819U (en) | System for insulating nature of multichannel on -line measuring subsea equipment | |
| CN205856612U (en) | Solar energy Intelligent electric bit test stake | |
| CN207380124U (en) | A kind of power-off of base station sensing detection device | |
| CN204495943U (en) | A kind of fault electric arc detector | |
| CN207396660U (en) | A kind of lightning protection resistor intelligent monitoring device | |
| RU87425U1 (en) | CATHODIC PROTECTION SYSTEM OF MAIN PIPELINES (OPTIONS) | |
| CN201903661U (en) | Sensing device for line-tracking robot | |
| CN206327551U (en) | Far-reaching extra large transportable buoy base is plugged into box oceanographic observation system | |
| CN105717403A (en) | Insulation fault monitoring system for cell array | |
| CN104090245B (en) | The detection means that a kind of DC power-supply system alternating current is mixed into | |
| CN110412420B (en) | Transmission line magnetism optoacoustic composite nondestructive detection device based on corona effect | |
| CN206804157U (en) | A kind of novel remote intelligent checking system | |
| CN107591793A (en) | A kind of intelligent power direction detection device and method applied to micro-grid system | |
| CN206515392U (en) | Ship Electrical Power System Harmonic Detecting Device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |