CN201876537U - Detector for online arrester monitoring device - Google Patents
Detector for online arrester monitoring device Download PDFInfo
- Publication number
- CN201876537U CN201876537U CN201020615226XU CN201020615226U CN201876537U CN 201876537 U CN201876537 U CN 201876537U CN 201020615226X U CN201020615226X U CN 201020615226XU CN 201020615226 U CN201020615226 U CN 201020615226U CN 201876537 U CN201876537 U CN 201876537U
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- sine wave
- compensation circuit
- voltage
- standard sine
- current
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- 238000012806 monitoring device Methods 0.000 title abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 abstract description 6
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 5
- 238000004146 energy storage Methods 0.000 description 14
- 230000001105 regulatory effect Effects 0.000 description 14
- 238000012544 monitoring process Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 6
- 238000012795 verification Methods 0.000 description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003449 preventive effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 229960001296 zinc oxide Drugs 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model relates to a detector for an online arrester monitoring device, which comprises a temperature compensation circuit, a non-linear compensation circuit, a standard sine wave signal generator, a voltage and current conversion device, an R232, a microcontroller, a liquid crystal display and a keyboard. The temperature compensation circuit and the non-linear compensation circuit arranged in parallel are respectively connected with the standard sine wave signal generator, the standard sine wave signal generator is connected with the voltage and current conversion device and the microcontroller, and the microcontroller is simultaneously connected to the R232, the liquid crystal display and the keyboard. The standard sine wave signal generator can generate a fixed voltage signal, and the voltage and current conversion device can convert the voltage signal into a required current signal of 0.2mA to 10mA. The microcontroller works as a control core and is mainly used as a man-machine interface and a data interface. The man-machine interface comprises the liquid crystal display and the keyboard, a user can set parameters through keys, and a system can display the parameters and test results through the liquid crystal display. The overall structure of the detector is simple, and the detector is convenient to operate and has high stability and reliability.
Description
Technical field
The utility model relates to the on-line measuring device of lightning arrester monitoring device, relates in particular to lightning arrester on-Line Monitor Device detector.
Background technology
The ac leakage current of measuring under the working voltage is the major function of metal oxide arrester on-line monitoring instrument, by the size of its leakage current, judges the metal oxide arrester operation condition in site, determines whether to damage and watered and wetting.At present, lightning arrester has all been installed the lightning arrester on-Line Monitor Device in the transformer station, by ruuning situation in recent years, there is following problem in discovery: 1, in the conventional preventive trial after lightning arrester puts into operation, can only the action situation of lightning arrester on-line monitoring instrument be detected, and the correctness of its electric current indication range is not had judging means.2, the lightning arrester on-Line Monitor Device is in operation, and is subjected to environmental influence, and the normal incorrect phenomenon of indication that occurs makes the operations staff throw doubt upon to its safety in operation.Some lightning arrester on-line monitoring instrument indication is incorrect to be that running environment causes, and for example at rainy day or foggy weather, the leakage current indication generally increases or alarm lamp starts; And indicated value is less than normal or to zero sometimes, then may be that lightning arrester insulation base dielectric level descends or short circuit.Comprehensive above reason is found, in the conventional preventive trial after lightning arrester puts into operation, can only the action situation of lightning arrester on-line monitoring instrument be detected, flag indicator only is used to write down the action frequency of lightning arrester under superpotential, and the correctness of its electric current indication range is not had the place that judging means is a problem.Though rules are defined in the preventive trial lightning arrester on-line monitoring instrument is not carried out the calibration of leakage current range, but from practical operation situation, by preventive trial lightning arrester on-line monitoring instrument being carried out the calibration of leakage current range, is to judge the whether normal important means of monitor.
Summary of the invention
The purpose of this utility model is, overcome the deficiencies in the prior art part, a kind of lightning arrester on-Line Monitor Device detector is provided, according to on-line monitoring instrument milliammeter testing circuit principle sum counter operating principle, stipulate according to national metrological verification regulations (JJG124-93 " reometer, voltage table, power meter and ohmmeter vertification regulation "), again on-line monitoring instrument milliammeter is detected the sum counter motion detection and be integrated, convenient on-the-spot the use.
Lightning arrester on-Line Monitor Device detector described in the utility model includes temperature compensation circuit, non-linear compensation circuit, standard sine wave generator, electric current and voltage conversion equipment, R232, single-chip microcomputer, LCD and keyboard and forms.The temperature compensation circuit and the non-linear compensation circuit that are set up in parallel, be connected with the standard sine wave generator respectively, the standard sine wave generator is connected to electric current and voltage conversion equipment and single-chip microcomputer again simultaneously, and single-chip microcomputer is connected to LCD and keyboard again when being connected to R232.50Hz standard sine wave generator produces fixing voltage signal, this voltage signal is changed into the current signal of desired 0.2mA ~ 10mA by the electric current and voltage conversion equipment.Because extraneous temperature variation can cause output voltage amplitude generation drift, the standard sine wave generator is noted at the output voltage under the different temperatures, obtain the temperature coefficient table, with 5 ℃ is step-length, temperature value according to semiconductor temperature sensor is gathered joins temperature system in the standard sine wave generator.Because circuit transmits nonlinearity in parameters, it is certain non-linear to make the output current signal of 0.2mA ~ 10mA have, in order to compensate this error, with output current is step-length with 0.1mA, record the current value in the whole range, use least square method, carry out nonlinear fitting, obtain match 5 order polynomials, this fitting coefficient is compensated in the standard sine wave signal generator circuit.After temperature compensation and nonlinear compensation processing, the linearity and the degree of stability of current feedback circuit circuit are greatly improved, and satisfy the test request of system comprehensively.In order to obtain maximum current amplitude and waveform steepness, must reduce the inductance of discharge loop as far as possible.Therefore, during design dash current device, should take into full account its rationality on the apparatus structure and in each parts choice.
Capacitance energy storage: store energy is the important component part in the dash current device in the charge circuit, the impact heavy current that directly obtains certain waveform requirement from electrical network is impossible, generally be earlier energy to be stored in the long time by means of energy storage system, and then instantaneous relase comes out, to obtain to impact heavy current.The method of storage power has multiple, as capacitance energy storage, inductive energy storage, mechanical energy storage, batteries to store energy etc., the wherein most widely used and technology maturation of capacitance energy storage mode.What we adopted in dash current device scheme is the capacitance energy storage mode.In line with the principle that reduces inductance, we select the pulsed capacitance of low inductance.When wiring, make line short as far as possible, electric current line in the same way as far as possible away from, make mutual inductance as far as possible little; And the incorgruous line of electric current is as close as possible, makes mutual inductance big as far as possible.Energy meter formula W=1/2CU according to capacitor
2Calculating, draw the capacitor value about 20 μ F, when voltage on capacitor is 700～800V,, can obtain the dash current output of waveform 8/20 μ s, current amplitude 100A by the triggering in gap.
Wave regulating resistor: in the dash current device, the effect of wave regulating resistor is an output waveform parameter of adjusting dash current.In order to make the loop produce big as far as possible dash current, just require the equivalent inductance in loop as far as possible little, design brings certain difficulty to wave regulating resistor for this, require the equivalent inductance of wave regulating resistor as far as possible little on the one hand, but in order to produce the dash current ripple of certain duration, wave regulating resistor must have suitable resistance.Between the equivalent resistance of wave regulating resistor and the equivalent inductance is the parameter of a pair of contradiction, and when resistance value was big, corresponding inductance value was also inevitable big.Thus, when we select to make wave regulating resistor, the alloy material manganese-copper filament of first-selected resistivity height, good stability.On the coiling manufacture craft, we have taked S doubling mode, by the turnover direction of electric current, have offset the inductance of resistance automatically, have obtained satisfied effect.
As the single-chip microcomputer in the complete machine is the control core of native system, mainly finishes human interface function and data-interface function.The human interface function is made up of LCD and keyboard, and the user carries out the parameter setting by button, and system is by liquid crystal display displays parameter and test result.Data-interface is communicated by letter with host computer by R232, and measurement data is uploaded in the host computer.
Lightning arrester on-Line Monitor Device detector described in the utility model, one-piece construction is simple, and is easy for operation, good stability, the reliability height can carry out the scene to the Zinc-Oxide Arrester on-Line Monitor Device and detect.After the start, instrument carries out the electric current verification automatically.The electric current verification is carried out the counter action checking after finishing automatically.
Description of drawings:
Accompanying drawing 1 is the general structure synoptic diagram of lightning arrester on-Line Monitor Device detector described in the utility model.1-temperature compensation circuit, 2-non-linear compensation circuit, 3-standard sine wave generator, 4-electric current and voltage conversion equipment, 5-R232,6-single-chip microcomputer, 7-LCD, 8-keyboard
Embodiment:
Referring now to accompanying drawing 1, be described as follows in conjunction with the embodiments: lightning arrester on-Line Monitor Device detector described in the utility model includes temperature compensation circuit 1, non-linear compensation circuit 2, standard sine wave generator 3, electric current and voltage conversion equipment 4, R232 5, single-chip microcomputer 6, LCD 7 and keyboard 8 and forms.Temperature compensation circuit 1 that is set up in parallel and non-linear compensation circuit 2, be connected with standard sine wave generator 3 respectively, standard sine wave generator 3 is connected to electric current and voltage conversion equipment 4 and single-chip microcomputer 6 again simultaneously, single-chip microcomputer 6 is connected to LCD 7 and keyboard 8 again when being connected to R232 5.50Hz standard sine wave generator 3 produces fixing voltage signal, this voltage signal is changed into the current signal of desired 0.2mA ~ 10mA by electric current and voltage conversion equipment 4.Because extraneous temperature variation can cause output voltage amplitude generation drift, standard sine wave generator 3 is noted at the output voltage under the different temperatures, obtain the temperature coefficient table, with 5 ℃ is step-length, temperature value according to semiconductor temperature sensor is gathered joins temperature system in the standard sine wave generator 3.Because circuit transmits nonlinearity in parameters, it is certain non-linear to make the output current signal of 0.2mA ~ 10mA have, in order to compensate this error, with output current is step-length with 0.1mA, record the current value in the whole range, use least square method, carry out nonlinear fitting, obtain match 5 order polynomials, this fitting coefficient is compensated in standard sine wave generator 3 circuit.After temperature compensation and nonlinear compensation processing, the linearity and the degree of stability of the current feedback circuit circuit in the electric current and voltage conversion equipment 4 can be greatly improved, and satisfy the test request of system comprehensively.In order to obtain maximum current amplitude and waveform steepness, must reduce the inductance of discharge loop as far as possible.Therefore, during design dash current device, should take into full account its rationality on the apparatus structure and in each parts choice.
Capacitance energy storage: store energy is the important component part in the dash current device in the charge circuit, the impact heavy current that directly obtains certain waveform requirement from electrical network is impossible, generally be earlier energy to be stored in the long time by means of energy storage system, and then instantaneous relase comes out, to obtain to impact heavy current.The method of storage power has multiple, as capacitance energy storage, inductive energy storage, mechanical energy storage, batteries to store energy etc., the wherein most widely used and technology maturation of capacitance energy storage mode.What we adopted in dash current device scheme is the capacitance energy storage mode.In line with the principle that reduces inductance, we select the pulsed capacitance of low inductance.When wiring, make line short as far as possible, electric current line in the same way as far as possible away from, make mutual inductance as far as possible little; And the incorgruous line of electric current is as close as possible, makes mutual inductance big as far as possible.Energy meter formula W=1/2CU according to capacitor
2Calculating, draw the capacitor value about 20 μ F, when voltage on capacitor is 700～800V,, can obtain the dash current output of waveform 8/20 μ s, current amplitude 100A by the triggering in gap.
Wave regulating resistor: in the dash current device, the effect of wave regulating resistor is an output waveform parameter of adjusting dash current.In order to make the loop produce big as far as possible dash current, just require the equivalent inductance in loop as far as possible little, design brings certain difficulty to wave regulating resistor for this, require the equivalent inductance of wave regulating resistor as far as possible little on the one hand, but in order to produce the dash current ripple of certain duration, wave regulating resistor must have suitable resistance.Between the equivalent resistance of wave regulating resistor and the equivalent inductance is the parameter of a pair of contradiction, and when resistance value was big, corresponding inductance value was also inevitable big.Thus, when we select to make wave regulating resistor, the alloy material manganese-copper filament of first-selected resistivity height, good stability.On the coiling manufacture craft, we have taked S doubling mode, by the turnover direction of electric current, have offset the inductance of resistance automatically, have obtained satisfied effect.
As the single-chip microcomputer in the complete machine 6 are control cores of native system, mainly finish human interface function and data-interface function.The human interface function is made up of LCD 7 and keyboard 8, and the user carries out the parameter setting by button, and system is by LCD 7 display parameter and test result.Data-interface is communicated by letter with host computer by R232 5, and measurement data is uploaded in the host computer.Lightning arrester on-Line Monitor Device detector described in the utility model, one-piece construction is simple, and is easy for operation, good stability, the reliability height can carry out the scene to the Zinc-Oxide Arrester on-Line Monitor Device and detect.After the start, instrument carries out the electric current verification automatically.The electric current verification is carried out the counter action checking after finishing automatically.
Claims (1)
1. lightning arrester on-Line Monitor Device detector, it is characterized in that the temperature compensation circuit (1) and the non-linear compensation circuit (2) that are set up in parallel, be connected with standard sine wave generator (3) respectively, standard sine wave generator (3) is connected to electric current and voltage conversion equipment (4) and single-chip microcomputer (6) again simultaneously, single-chip microcomputer (6) is being connected to R232(5) in, be connected to LCD (7) and keyboard (8) again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020615226XU CN201876537U (en) | 2010-11-19 | 2010-11-19 | Detector for online arrester monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020615226XU CN201876537U (en) | 2010-11-19 | 2010-11-19 | Detector for online arrester monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876537U true CN201876537U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020615226XU Expired - Fee Related CN201876537U (en) | 2010-11-19 | 2010-11-19 | Detector for online arrester monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201876537U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798786A (en) * | 2012-09-10 | 2012-11-28 | 天津协盛闪宁科技有限公司 | Universal intelligent lightning protection monitoring module and method |
| CN103675745A (en) * | 2013-12-17 | 2014-03-26 | 国家电网公司 | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment |
-
2010
- 2010-11-19 CN CN201020615226XU patent/CN201876537U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798786A (en) * | 2012-09-10 | 2012-11-28 | 天津协盛闪宁科技有限公司 | Universal intelligent lightning protection monitoring module and method |
| CN103675745A (en) * | 2013-12-17 | 2014-03-26 | 国家电网公司 | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment |
| CN103675745B (en) * | 2013-12-17 | 2017-01-25 | 浙江省电力试验研究院技术服务中心 | Checking system of on-line monitoring device for zinc oxide arrester and capacitive equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. Effective date: 20130219 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 272039 JINING, SHANDONG PROVINCE TO: 272000 JINING, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130219 Address after: 272000 Torch Road 28, Jining Development Zone, Shandong, Jining Patentee after: Jining Power Supply Company of Shandong Electric Power Group Company Patentee after: State Grid Corporation of China Address before: Torch Road, Jining Development Zone 272039 Shandong province Jining City District No. 28 Patentee before: Jining Power Supply Company of Shandong Electric Power Group Company |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20151119 |
|
| EXPY | Termination of patent right or utility model |