CN106093823A - A kind of self checking technology of insulation monitoring and warning device - Google Patents
A kind of self checking technology of insulation monitoring and warning device Download PDFInfo
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- CN106093823A CN106093823A CN201610696756.3A CN201610696756A CN106093823A CN 106093823 A CN106093823 A CN 106093823A CN 201610696756 A CN201610696756 A CN 201610696756A CN 106093823 A CN106093823 A CN 106093823A
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- self checking
- warning device
- insulation monitoring
- electric resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses the self checking technology of a kind of insulation monitoring and warning device, including CPU, electric resistance array, voltage sampling unit, A/D converting unit, data storage cell and display unit, described voltage sampling unit gathers the voltage-to-ground size of the straight-flow system of access device and detection data is transferred to A/D converting unit, data after A/D converting unit will process are transferred in CPU, and CPU is also respectively connected with electric resistance array, data storage cell and display unit.The self checking technology of insulation monitoring and warning device of the present invention is by the self-inspection of D.C. isolation device and the research of self checking technology, plant running can be made intelligent, substantial amounts of man power and material is avoided to put into above the operation maintenance of device, also device can be allowed to always work in outstanding state simultaneously, increase the service life so that it is the data monitored are more accurate.
Description
Technical field
The present invention relates to power equipment reliability assessment technology field, the self checking skill of a kind of insulation monitoring and warning device
Art.
Background technology
D.C. isolation monitoring device operation present situation: the D.C. isolation monitoring device that power plant and Ge great transformer station use now
Great majority all have the longest time limit, can there is the every accuracy of detection of device the most unavoidably and decline, topmost
It is exactly that the computational accuracy of the insulation resistance in system under test (SUT) is declined by device, thus causes the generation of wrong report in running several
Rate increases, meanwhile, with the matching used leakage current sensor of D.C. isolation monitoring device also can exist the decline of performance, the most sternly
Weight is sensor degradation, it is impossible to uses, which results in device when system malfunctions when and cannot be carried out examining accurately
Surveying, nor correct can carry out route selection, What is more cannot carry out route selection to fault loop exactly.
The verification present situation of D.C. isolation monitoring device: long at D.C. isolation monitoring device service life, is necessary for artificial
It is carried out verification operation, and simplest way is exactly to simulate an insulation fault in systems, whether sees D.C. isolation device
System failure resistance can be calculated accurately and carry out route selection process accurately, but our present verification is the most single
Verification, be only sometimes that one one pole ground connection of simulation verifies, the not full validation to package unit；It addition,
Most insulation monitoring and warning device is all to have passed through a few Nian Caihui once to verify, and have did not the most verify at all, therefore,
The verification of D.C. isolation monitoring device is something of very labor intensive material resources for current.
Current D.C. isolation monitoring device great majority all possess some simple functions to self and carry out self-inspection, such as fill
The balance bridge fault detect put, device abnormality detection etc.；It is known that present most D.C. isolation monitoring device be all by
Acquisition module and main frame composition, main frame is responsible to be monitored system, and acquisition module is responsible for adopting the leakage current in each loop
Collection, but a lot of device does not the most possess the self-inspection to each circuit sensor, when sensor performance declines or loses efficacy cannot and
Time detect.
Summary of the invention
It is an object of the invention to provide the self checking technology of a kind of insulation monitoring and warning device, to solve in above-mentioned background technology
The problem proposed.
For achieving the above object, the present invention provides following technical scheme:
The self checking technology of a kind of insulation monitoring and warning device, changes single including CPU, electric resistance array, voltage sampling unit, A/D
Unit, data storage cell and display unit, the voltage-to-ground of the straight-flow system that described voltage sampling unit gathers access device is big
Little and detection data are transferred to A/D converting unit, the data after A/D converting unit will process are transferred in CPU, and CPU also divides
Do not connect electric resistance array, data storage cell and display unit.
Preferred version as the present invention: described display unit uses the liquid crystal touch display screen of 7 cun.
Preferred version as the present invention: described electric resistance array is made up of resistance and light coupling relay, one has two electricity
Resistance array, each electric resistance array be all by 0.1K Ω, 0.2K Ω, 0.4K Ω, 0.8K Ω, 1K Ω, 2K Ω, 4K Ω, 8K Ω,
The resistance composition of 16K Ω, 32K Ω, 64K Ω and 128K Ω, each resistance is controlled by a light coupling relay.
Preferred version as the present invention: described A/D AD conversion unit mainly uses the AD of 24 at a high speed to simulate number
Word conversion chip.
Preferred version as the present invention: described data storage cell uses pin-saving chip TLC24L01.
Compared with prior art, the invention has the beneficial effects as follows: the self checking technology of insulation monitoring and warning device of the present invention is passed through
Self-inspection and the research of self checking technology to D.C. isolation device, it is possible to make plant running intelligent, it is to avoid substantial amounts of manpower
Put into above the operation maintenance of device with material resources, device also can be allowed to always work in outstanding state simultaneously, increase the service life,
Make its data monitored more accurate.
Accompanying drawing explanation
Fig. 1 is the entire block diagram of the self checking technology of a kind of insulation monitoring and warning device；
Fig. 2 is the circuit diagram of electric resistance array；
Fig. 3 is the circuit diagram of voltage sampling unit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Referring to Fig. 1-3, the self checking technology of a kind of insulation monitoring and warning device, including CPU, electric resistance array, voltage sample list
Unit, A/D converting unit, data storage cell and display unit, described voltage sampling unit gathers the straight-flow system of access device
Voltage-to-ground size and detection data are transferred to A/D converting unit, A/D converting unit will process after data be transferred to
In CPU, CPU is also respectively connected with electric resistance array, data storage cell and display unit.
Display unit uses the liquid crystal touch display screen of 7 cun.
Electric resistance array is made up of resistance and light coupling relay, and one has two electric resistance arrays, and each electric resistance array is all
By 0.1K Ω, 0.2K Ω, 0.4K Ω, 0.8K Ω, 1K Ω, 2K Ω, 4K Ω, 8K Ω, 16K Ω, 32K Ω, 64K Ω and 128K Ω
Resistance forms, and each resistance is controlled by a light coupling relay.
A/D AD conversion unit mainly uses the AD Analog-digital Converter chip of 24 at a high speed.Data storage cell is adopted
Use pin-saving chip TLC24L01.
The operation principle of the present invention is: the function of device self checking, and this function is controlled opening and closing by display screen
Closing, enter parameter and arrange interface after this function is opened in face on a display screen, user can arrange input by parameter and select not
Same verification mode, verification mode has two kinds: the verification of one pole ground connection and the verification of the two poles of the earth ground connection, wherein the verification of one pole ground connection is divided into again
Plus earth and minus earth, be parameter input after selected verification mode, and input to carry out the resistance value size verified, to setting
Good parameter selects, and resistance value could be arranged to: 0～256K Ω；Each verification can input 5 groups of data, often organizes number
Interval time between according to, parameter preserved after having set by user's sets itself, arrived, when the time, the verification set
Opening time, first device carries out system detection, opens self checking, be otherwise not turned on the premise of system failure.
Electric resistance array is made up of light coupling relay and precision resister, and each resistance is by a light coupling relay control
System, as shown in Figure 2.
This electric resistance array has two inside device, in order to simulate two pole ground faults, each light coupling relay by
CPU is controlled, and the parameter set is calculated by CPU, then opens corresponding light coupling relay, thus obtains the resistance set
Value size, one end of electric resistance array is directly to be connected to ground, and other end is controlled by light coupling relay, is opening self checking
This light coupling relay Guan Bi during function, disconnects the when of closedown.When in checking procedure, the time arrives the interval time set, automatically
Jump into next resistance to verify.Carry out accessing during the verification of the two poles of the earth ground connection is two electric resistance arrays, principle and one pole ground connection
Verification is the same.
Verifying when, device carries out voltage sample and carries out the calculating of system insulating resistance, after calculating
The data obtained are preserved, and voltage sampling circuit is as shown in Figure 3.
When device enters checking mode, both positive and negative polarity voltage-to-ground or change, by voltage sampling circuit to positive and negative
Pole voltage-to-ground carries out sampling processing, first voltage-to-ground after the resistance machine of 1M and 1K carries out dividing potential drop, the most over the ground electricity
Giving A/D analog-digital converter after pressure dividing potential drop after second-order filter circuit and be simulated numeral conversion, negative pole voltage-to-ground passes through
After dividing potential drop, because being negative voltage, so needing, through a voltage offset electric circuit, negative pressure is become positive voltage, it is then passed through second order
Give A/D analog-digital converter after filter circuit to change.The digital signal being converted to directly is given CPU and is counted
Calculate, obtain the system resistance value size under current state, and preserve.
After verification terminates, the resistance value that checking procedure is obtained by device is analyzed processing, and carries out with the resistance value of simulation
Contrast, if the self-regulation of the bigger starter of error, the electricity self obtained by the resistance value size and device of simulation
The coefficient of algorithm when resistance is sized to calculate device detection fault, the renewal then carrying out coefficient processes.Equally, verify
These data arrived will not be clear, but preserves according to timing node and function, facilitates user to carry out checking of data.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.Should not be considered as limiting involved claim by any reference in claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (5)
1. a self checking technology for insulation monitoring and warning device, including CPU, electric resistance array, voltage sampling unit, A/D converting unit,
Data storage cell and display unit, it is characterised in that described voltage sampling unit gathers the right of the straight-flow system of access device
Detection data are also transferred to A/D converting unit by ground voltage size, and the data after A/D converting unit will process are transferred in CPU,
CPU is also respectively connected with electric resistance array, data storage cell and display unit.
The self checking technology of a kind of insulation monitoring and warning device the most according to claim 1, it is characterised in that described display unit
Use the liquid crystal touch display screen of 7 cun.
The self checking technology of a kind of insulation monitoring and warning device the most according to claim 1, it is characterised in that described electric resistance array
Being made up of resistance and light coupling relay, one has two electric resistance arrays, each electric resistance array be all by 0.1K Ω, 0.2K Ω,
The resistance composition of 0.4K Ω, 0.8K Ω, 1K Ω, 2K Ω, 4K Ω, 8K Ω, 16K Ω, 32K Ω, 64K Ω and 128K Ω, each
Resistance is all controlled by a light coupling relay.
The self checking technology of a kind of insulation monitoring and warning device the most according to claim 1, it is characterised in that described A/D modulus
Converting unit mainly uses the AD Analog-digital Converter chip of 24 at a high speed.
The self checking technology of a kind of insulation monitoring and warning device the most according to claim 1, it is characterised in that described data store
Unit uses pin-saving chip TLC24L01.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696756.3A CN106093823A (en) | 2016-08-18 | 2016-08-18 | A kind of self checking technology of insulation monitoring and warning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696756.3A CN106093823A (en) | 2016-08-18 | 2016-08-18 | A kind of self checking technology of insulation monitoring and warning device |
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| Publication Number | Publication Date |
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| CN106093823A true CN106093823A (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610696756.3A Pending CN106093823A (en) | 2016-08-18 | 2016-08-18 | A kind of self checking technology of insulation monitoring and warning device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646317A (en) * | 2017-02-14 | 2017-05-10 | 国网新疆电力公司伊犁供电公司 | Portable DC insulation detector test device |
| CN108931752A (en) * | 2017-05-24 | 2018-12-04 | 国网新疆电力公司塔城供电公司 | A kind of insulating check device and insulating check instrument |
| CN113933774A (en) * | 2021-09-29 | 2022-01-14 | 海南电网有限责任公司电力科学研究院 | One-button type insulation monitoring device all-dimensional functionality evaluation system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202494775U (en) * | 2012-03-28 | 2012-10-17 | 广州优维电子科技有限公司 | Calibrator for DC system insulation device |
| CN203502580U (en) * | 2013-10-12 | 2014-03-26 | 上海思创电器设备有限公司 | Checking system for online insulation monitoring device |
| CN104062616A (en) * | 2014-06-22 | 2014-09-24 | 国家电网公司 | Direct-current earthing and alternating current-directing current series simulation device |
| CN105699927A (en) * | 2016-03-16 | 2016-06-22 | 国家电网公司 | DC system insulation monitor calibration device |
-
2016
- 2016-08-18 CN CN201610696756.3A patent/CN106093823A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202494775U (en) * | 2012-03-28 | 2012-10-17 | 广州优维电子科技有限公司 | Calibrator for DC system insulation device |
| CN203502580U (en) * | 2013-10-12 | 2014-03-26 | 上海思创电器设备有限公司 | Checking system for online insulation monitoring device |
| CN104062616A (en) * | 2014-06-22 | 2014-09-24 | 国家电网公司 | Direct-current earthing and alternating current-directing current series simulation device |
| CN105699927A (en) * | 2016-03-16 | 2016-06-22 | 国家电网公司 | DC system insulation monitor calibration device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646317A (en) * | 2017-02-14 | 2017-05-10 | 国网新疆电力公司伊犁供电公司 | Portable DC insulation detector test device |
| CN108931752A (en) * | 2017-05-24 | 2018-12-04 | 国网新疆电力公司塔城供电公司 | A kind of insulating check device and insulating check instrument |
| CN113933774A (en) * | 2021-09-29 | 2022-01-14 | 海南电网有限责任公司电力科学研究院 | One-button type insulation monitoring device all-dimensional functionality evaluation system and method |
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Application publication date: 20161109 |
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