CN104777444A - Lightning arrester discharge counter comprehensive calibration instrument and calibration method - Google Patents
Lightning arrester discharge counter comprehensive calibration instrument and calibration method Download PDFInfo
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- CN104777444A CN104777444A CN201510176426.7A CN201510176426A CN104777444A CN 104777444 A CN104777444 A CN 104777444A CN 201510176426 A CN201510176426 A CN 201510176426A CN 104777444 A CN104777444 A CN 104777444A
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Abstract
The invention relates to a lightning arrester discharge counter comprehensive calibration instrument. The lightning arrester discharge counter comprehensive calibration instrument adopts the structure as follows: a power supply unit, an LCD liquid crystal display unit and a key operating unit are connected with a singlechip microcontroller main control unit at the same time; the singlechip microcontroller main control unit is connected with a counter milliammeter inspection unit and a counter action times inspection unit at the same time. The lightning arrester discharge counter comprehensive calibration instrument can automatically output lightning simulating shock waveform to a counter, and through operation of the singlechip microcontroller main control unit, whether a calibration count displayed by a display screen and counter action times are consistent or not is checked so as to check whether the counter action times are abnormal or not; on a milliammeter calibration function interface, a scale displayed by a lightning arrester discharge counter milliammeter is compared with output current displayed by the calibration instrument to check whether a significant difference exists therebetween or not, so that whether the scale displayed by the lightning arrester discharge counter milliammeter is accurate or not can be judged; the labor intensity of field test personnel is reduced; the reliability and the accuracy of data displayed by an online lightning arrester monitoring instrument are improved.
Description
Technical field
The present invention relates to a kind of electric system counter of lightning arrester field adjustable equipment, particularly relate to a kind of arrester discharge counter comprehensive calibrator and method of calibration, be mainly used in the field-checking of electric system arrester discharge counter, belong to electric power application.
Background technology
In recent years along with power system device on-line monitoring increases gradually; the discharge counter of Hyper-Voltage of Power Systems patron saint-lightning arrester; by single record lightning arrestor movement number of times, while developing into counting, possesses a kind of On-line Instrument of monitoring lightning arrester whether existing defects.At present, to arrester discharge counter, we only have employed bar type COUNTER CHECK instrument and carry out the verification of thunder and lightning movement counting, but DL/T393-2101 " power transmission and transformation equipment state overhauling testing regulations " requires that to counter, milliammeter being housed should verify milliammeter simultaneously, now there is no corresponding instrument verification.Although we have carried out Zinc oxide lightning arrester live-line test but also can only carry out single-point verification to the total current under working voltage, the overall display precision of reometer cannot be verified, lightning arrester defect can not have been found by the change of Leakage Current in time.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, provide a kind of arrester discharge counter comprehensive calibrator, solve and cannot check test problem to counter of lightning arrester internal leakage milliammeter, this instrument energy degree of accuracy of monitor counter reometer and number of times of counter of lightning arrester action in time, ensures power system security reliability service.
Another object of the present invention is the method for calibration providing a kind of arrester discharge counter comprehensive calibrator.
Technical scheme of the present invention is as follows:
Counter of lightning arrester comprehensive calibrator comprises power supply unit, LCD liquid crystal display, key operation unit, single-chip microcomputer main control unit, counter milliammeter verification unit, counting machine action frequency verification unit, wherein power supply unit, LCD liquid crystal display and key operation unit are connected with single-chip microcomputer main control unit simultaneously, and single-chip microcomputer main control unit is connected with counter milliammeter verification unit, counter action number of times verification unit simultaneously.
Described power supply unit adopts high-performance lithium battery-powered.
Described LCD liquid crystal display uses resolution 128*64 dot matrix single colour liquid crystal display.
Described single-chip microcomputer main control unit uses single-chip microcomputer as primary controller.
Described counter milliammeter verification unit comprises electric battery, power frequency inversion unit, duplex frequency boostering transformer, current adjustment unit; The inversion main control unit of power frequency inversion unit inside produces the square wave of dutycycle by sinusoidal rule change, after this square-wave signal carries out power amplification via H-bridge drive circuit, filtering is carried out by the inductance capacitance in sinusoidal wave generation unit, become the level and smooth sine wave identical with civil power, enter duplex frequency boostering transformer boosting.
Described counter milliammeter verification unit, adopt inner program control inverter to control alternating current to export, verify the pointing accuracy leaking milliammeter, the definite value that electric current exports as 9 shelves of 0.2mA-0.5mA-1.0mA-1.5mA-2.0mA-3.0mA-5.0mA-10.0mA-15.0mA exports.
Described counting machine action frequency verification unit comprises electric battery, variable duty ratio generative circuit, high direct voltage generating unit, voltage levels Gear Select Switch, high-voltage capacitance, counting output switch; Variable duty ratio generative circuit produces the pulse width modulated wave of variable duty ratio, pulse width modulated wave drives the power tube of high direct voltage generating unit inside, high-tension transformer output terminal produces the high direct voltage of pulsation, high direct voltage, after high-speed rectifier diode and voltage levels Gear Select Switch, enters high-voltage capacitance and becomes level and smooth high direct voltage and be stored.
The exportable lightening strike simulating waveform of described counting check functional unit, output waveform feature: voltage peak is 800V and 1200V, waveform: 8/20 us; Current amplitude: > 100A.
Method of testing of the present invention comprises the steps:
During inspection, start shooting after two of counter of lightning arrester comprehensive calibrator p-wires are connected on arrester discharge counter two ends, on counting check function interface, by " automatic Verification ", selection check number of times (3 times or 5 times), instrument exports lightening strike simulating waveform to counter automatically, and whether the verification counting of instrument display screen display is checked consistent with counter action number of times, thus checks that whether counter action number of times is normal; On milliammeter verifying function interface, by " automatic Verification ", lightning arrester discharge is counted the output current that milliammeter registration scale and tester show to contrast, see whether have obvious deviation between the two, can judge whether the display of arrester discharge counter milliammeter registration scale is accurate.
Advantageous effect of the present invention is as follows:
1, movement counting inspection and leakage current are verified two verification projects and only use one set of instrument and a p-wire by the present invention, and only need operate several simple button on instrument can complete all Interventions Requested, substantially increases work efficiency.
2, when the present invention uses, wiring is simple, and instrument volume is little, lightweight, easy to carry; Tester is powered and is adopted the inner high-performance lithium ion rechargeable battery carried, and instrument Overall Power Consumption is low, and a charging complete can use more than 8 hours continuously, is applicable to very much the use of substation field.
3, the present invention well solves existing product Problems existing and deficiency, reduces the labour intensity of site test personnel, improves reliability, the accuracy of lightning arrester on-line computing model display data.
4, global design of the present invention has taken into full account technology and the application characteristic of arrester discharge counter, counter action number of times School Affairs leakage current is verified two test functions unite two into one, and combine on-the-spot practical situations, accomplish compact conformation, use the advantages such as simple, easy to carry.Meet the precision checking of current all Zinc-Oxide Arrester counter action and leakage milliammeter.Operation uses simple, easy to learn, without the need to carrying out the training of operating personnel in advance.
Accompanying drawing explanation
Fig. 1 is structural principle of the present invention and measures schematic block diagram.
Fig. 2 is the circuit theory schematic diagram of counter milliammeter verification unit of the present invention.
Fig. 3 is the circuit theory schematic diagram of counting machine action frequency verification unit of the present invention.
Embodiment
Referring to accompanying drawing, in conjunction with specific embodiments, the present invention is described in detail
.
Embodiment
Global design as Fig. 1 counter of lightning arrester comprehensive calibrator has taken into full account technology and the application characteristic of arrester discharge counter, counter action number of times School Affairs leakage current is verified two test functions unite two into one, and combine on-the-spot practical situations, accomplish compact conformation, use the advantages such as simple, easy to carry.Meet the precision checking of current all Zinc-Oxide Arrester counter action and leakage milliammeter.Counter of lightning arrester comprehensive calibrator is primarily of formations such as power supply unit, LCD liquid crystal display, key operation unit, single-chip microcomputer main control unit, counter milliammeter verification unit, counting machine action frequency verification units, power supply unit, LCD liquid crystal display and key operation unit are connected with single-chip microcomputer main control unit simultaneously, and single-chip microcomputer main control unit is connected with counter milliammeter verification unit, counter action number of times verification unit simultaneously.Described power supply unit, adopts high-performance lithium battery-powered, inner through various high efficiency voltage conversion circuit, provides complete machine work necessary electric energy.Instrument Overall Power Consumption is low, and a charging complete can use more than 8 hours continuously.Described LCD liquid crystal display uses resolution 128*64 dot matrix single colour liquid crystal display, can clear Chinese display and figure, and carry backlight, all can the data such as clear display instrument current operating state, checking parameter and measurement result under various light conditions.Good environmental adaptability, all can normally work in-5 DEG C ~ 45 DEG C temperature ranges.Described counter of lightning arrester comprehensive calibrator has " milliammeter verification " and " counting check " two kinds of functions, and correlation parameter adjustment function, and these are all by the button operation on panel.Described single-chip microcomputer main control unit uses single-chip microcomputer as primary controller, the advantages such as integrated level is high, compact conformation, low in energy consumption, antijamming capability is strong that it has; There are 32 powerful bit data processing poweies, can carry out in real time for various data, calculation process at a high speed; Described counter milliammeter verification unit, adopt inner program control inverter to control alternating current to export, the pointing accuracy leaking milliammeter is verified, the definite value that electric current exports as 9 shelves such as 0.2mA-0.5mA-1.0mA-1.5mA-2.0mA-3.0mA-5.0mA-10.0mA-15.0mA exports, and can carry out customization selection by user according to the actual needs of oneself.The exportable lightening strike simulating waveform of described counting check functional unit, output waveform feature: voltage peak is can select " low (800V) " and " high (1200V) ", waveform: 8/20 us; Current amplitude: > 100A.
As shown in Figure 1, method of testing of the present invention comprises the steps:
During inspection, start shooting after two of counter of lightning arrester comprehensive calibrator p-wires are connected on arrester discharge counter two ends, on counting check function interface, by " automatic Verification ", selection check number of times (3 times or 5 times), instrument exports lightening strike simulating waveform to counter automatically, and whether the verification counting of instrument display screen display is checked consistent with counter action number of times, thus checks that whether counter action number of times is normal; On milliammeter verifying function interface, by " automatic Verification ", lightning arrester discharge is counted the output current that milliammeter registration scale and tester show to contrast, see whether have obvious deviation between the two, can judge whether the display of arrester discharge counter milliammeter registration scale is accurate.Operation uses simple, easy to learn, without the need to carrying out the training of operating personnel in advance.
Described counter of lightning arrester comprehensive calibrator has " milliammeter verification " and " counting check " two kinds of functions, and correlation parameter adjustment function, and these are all by the button operation on panel.
Wherein " verification type " button can switch between the two in " milliammeter verification " and " counting check ", then presses flow process that " automatic Verification " key starts to reserve in advance according to inside to verify arrester discharge counter.Also the verification of single step can be carried out by " upper/manual counting " or " under/manual electric current ".
" to determine " and " cancellation " key is used for entering and logging off parameter adjustment menu, coordinate " upper/manual counting ", " under/manual electric current " parameter that two keys adjustment are relevant, as parameters such as counting check number of times, verification interval times.
As shown in Figure 2, described counter milliammeter verification unit comprises electric battery, power frequency inversion unit, duplex frequency boostering transformer, current adjustment unit.
During system works, the square wave of dutycycle by sinusoidal rule change is produced by the inversion main control unit of power frequency inversion unit inside, after this signal carries out power amplification via H-bridge drive circuit, filtering is carried out by the inductance capacitance in sinusoidal wave generation unit, become the level and smooth sine wave identical with civil power, enter duplex frequency boostering transformer boosting.
Export the alternating current of a series of current value by pre-set programs, observe the pointer indicator current value of milliammeter on arrester discharge counter, whether corresponding with the output current value of tester, using as the whether normal basis for estimation of arrester discharge counter work.
As shown in Figure 3, described counting machine action frequency verification unit comprises electric battery, variable duty ratio generative circuit, high direct voltage generating unit, voltage levels Gear Select Switch, high-voltage capacitance, counting output switch.
During system works, the pulse width modulated wave of variable duty ratio is produced by variable duty ratio generative circuit, drive the power tube of high direct voltage generating unit inside, export through high-tension transformer boosting, the high direct voltage of pulsation is produced at transformer output terminal, after high-speed rectifier diode and Gear Select Switch, enter high-voltage capacitance become level and smooth high direct voltage and be stored, when Gear Select Switch is dialled at high-pressure side, the transient voltage value of High voltage output is 1200V, when Gear Select Switch is dialled at low pressure end, the transient voltage value of High voltage output is 800V.When electric capacity is filled with high voltage electricity, high pressure count pulse output terminal connects arrester discharge counter, internal processes controls counting output switch transient switching, exporting a time waveform from high pressure count pulse output terminal to arrester discharge counter is 8/20us, amplitude is greater than the simulation thunderbolt shock wave of 100A, and this shock wave makes arrester discharge counter produce a counting thunder.
Claims (9)
1. arrester discharge counter comprehensive calibrator, it is characterized in that comprising power supply unit, LCD liquid crystal display, key operation unit, single-chip microcomputer main control unit, counter milliammeter verification unit, counting machine action frequency verification unit, wherein power supply unit, LCD liquid crystal display and key operation unit are connected with single-chip microcomputer main control unit simultaneously, and single-chip microcomputer main control unit is connected with counter milliammeter verification unit, counter action number of times verification unit simultaneously.
2. arrester discharge counter comprehensive calibrator according to claim 1, is characterized in that described power supply unit adopts high-performance lithium battery-powered.
3. arrester discharge counter comprehensive calibrator according to claim 1, is characterized in that described LCD liquid crystal display uses resolution 128*64 dot matrix single colour liquid crystal display.
4. arrester discharge counter comprehensive calibrator according to claim 1, is characterized in that described single-chip microcomputer main control unit uses single-chip microcomputer as primary controller.
5. arrester discharge counter comprehensive calibrator according to claim 1, is characterized in that described counter milliammeter verification unit comprises electric battery, power frequency inversion unit, duplex frequency boostering transformer, current adjustment unit; The inversion main control unit of power frequency inversion unit inside produces the square wave of dutycycle by sinusoidal rule change, after this square-wave signal carries out power amplification via H-bridge drive circuit, filtering is carried out by the inductance capacitance in sinusoidal wave generation unit, become the level and smooth sine wave identical with civil power, enter duplex frequency boostering transformer boosting.
6. arrester discharge counter comprehensive calibrator according to claim 1 or 5, it is characterized in that described counter milliammeter verification unit, adopt inner program control inverter to control alternating current to export, verify the pointing accuracy leaking milliammeter, the definite value that electric current exports as 9 shelves of 0.2mA-0.5mA-1.0mA-1.5mA-2.0mA-3.0mA-5.0mA-10.0mA-15.0mA exports.
7. arrester discharge counter comprehensive calibrator according to claim 1, is characterized in that described counting machine action frequency verification unit comprises electric battery, variable duty ratio generative circuit, high direct voltage generating unit, voltage levels Gear Select Switch, high-voltage capacitance, counting output switch; Variable duty ratio generative circuit produces the pulse width modulated wave of variable duty ratio, pulse width modulated wave drives the power tube of high direct voltage generating unit inside, high-tension transformer output terminal produces the high direct voltage of pulsation, high direct voltage, after high-speed rectifier diode and voltage levels Gear Select Switch, enters high-voltage capacitance and becomes level and smooth high direct voltage and be stored.
8. the arrester discharge counter comprehensive calibrator according to claim 1 or 7, is characterized in that the exportable lightening strike simulating waveform of described counting check functional unit, output waveform feature: voltage peak is 800V and 1200V, waveform: 8/20 us; Current amplitude: > 100A.
9. the method for calibration of arrester discharge counter comprehensive calibrator according to claim 1, is characterized in that comprising the steps:
During inspection, start shooting after two of counter of lightning arrester comprehensive calibrator p-wires are connected on arrester discharge counter two ends, on counting check function interface, by " automatic Verification ", selection check number of times (3 times or 5 times), instrument exports lightening strike simulating waveform to counter automatically, and whether the verification counting of instrument display screen display is checked consistent with counter action number of times, thus checks that whether counter action number of times is normal; On milliammeter verifying function interface, by " automatic Verification ", lightning arrester discharge is counted the output current that milliammeter registration scale and tester show to contrast, see whether have obvious deviation between the two, can judge whether the display of arrester discharge counter milliammeter registration scale is accurate.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106125030A (en) * | 2016-06-27 | 2016-11-16 | 国网甘肃省电力公司白银供电公司 | The multifunctional check of Portable arrester on-Line Monitor Device |
| CN106707214A (en) * | 2016-12-30 | 2017-05-24 | 武汉市欧睿科技有限公司 | Lightning strike counter check meter |
| CN106771761A (en) * | 2016-12-30 | 2017-05-31 | 国家电网公司 | A kind of hand-held arrester counter auto testing instrument |
| CN107632186A (en) * | 2017-08-08 | 2018-01-26 | 芜湖市凯鑫避雷器有限责任公司 | A kind of discharge counter of easy disassembly |
| CN110646694A (en) * | 2019-09-29 | 2020-01-03 | 江苏方天电力技术有限公司 | High-voltage simulation calibration device |
| CN113936515A (en) * | 2021-08-25 | 2022-01-14 | 国网浙江省电力有限公司培训中心 | Lightning arrester test training and examination system |
| CN114089248A (en) * | 2021-11-26 | 2022-02-25 | 广东电网有限责任公司 | Lightning stroke counter testing device and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632186A (en) * | 2017-08-08 | 2018-01-26 | 芜湖市凯鑫避雷器有限责任公司 | A kind of discharge counter of easy disassembly |
| CN110646694A (en) * | 2019-09-29 | 2020-01-03 | 江苏方天电力技术有限公司 | High-voltage simulation calibration device |
| CN113936515A (en) * | 2021-08-25 | 2022-01-14 | 国网浙江省电力有限公司培训中心 | Lightning arrester test training and examination system |
| CN114089248A (en) * | 2021-11-26 | 2022-02-25 | 广东电网有限责任公司 | Lightning stroke counter testing device and method |
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