CN203365555U - Tower impulse grounding resistance measuring device - Google Patents
Tower impulse grounding resistance measuring device Download PDFInfo
- Publication number
- CN203365555U CN203365555U CN 201320356246 CN201320356246U CN203365555U CN 203365555 U CN203365555 U CN 203365555U CN 201320356246 CN201320356246 CN 201320356246 CN 201320356246 U CN201320356246 U CN 201320356246U CN 203365555 U CN203365555 U CN 203365555U
- Authority
- CN
- China
- Prior art keywords
- tower
- impulse
- processor
- voltage
- current
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides a tower impulse grounding resistance measuring device. The tower impulse grounding resistance measuring device comprises a processor, an impulse current generator, a voltage acquisition unit and a current acquisition unit, wherein the processor is connected with the impulse current generator, triggers the impulse current generator when receiving a measuring command, and obtains a tower impulse grounding resistance result according to a received voltage value and a received current value; the impulse current generator is connected between the processor and a tower grounding body, generates an incident current when receiving a triggering instruction of the processor, and injects the incident current into the tower grounding body; the voltage acquisition unit is connected between the tower grounding body and the processor, collects the voltage of the tower grounding body, and sends the collected voltage value to the processor; and the current acquisition unit is connected between the tower grounding body and the processor, collects the current of the tower grounding body, and sends the collected current value to the processor. According to the technical scheme, measuring precision is improved, the measuring circuit is simplified, and cost is saved.
Description
Technical field
The utility model relates to the resistive measurement field, in particular to a kind of Tower Impulse Grounding Resistance measurement mechanism.
Background technology
The domestic and international measurement to Tower Impulse Grounding Resistance at present mainly contains three kinds of methods: the method that the method for numerical evaluation, the method for in-site measurement and numerical evaluation combine with in-site measurement.
The method of numerical evaluation: this method is set up the mathematics physics model difficulty, solves complicated loaded down with trivial detailsly, considers on-the-spot different environment, as different soil resistivities and different landform etc. factor, do not have generality, and result of calculation can't be verified.
The method of in-site measurement: although this method is measured accurately, measuring equipment is extremely heavy, is not suitable for the field shaft tower and measures, and area especially with a varied topography, carry out in-site modeling measurement possibility hardly, and the ubiquity of in-site measurement is poor.
In addition, the dash current of current its generation of impact grounding resistance measuring instrument device is less, and measuring accuracy is not high.
Therefore, need a kind of new technical scheme, can improve the precision that impulse earthed resistance is measured, the simplified measurement circuit, cost-saving simultaneously.
The utility model content
The utility model just is being based on the problems referred to above, has proposed a kind of new technical scheme, can improve the precision that impulse earthed resistance is measured, and the simplified measurement circuit, cost-saving simultaneously.
In view of this, the utility model proposes a kind of Tower Impulse Grounding Resistance measurement mechanism, comprise: processor, be connected in impulse current generator, when receiving measuring command, trigger impulse current generator, and obtain described Tower Impulse Grounding Resistance value result according to the magnitude of voltage and the current value that receive from voltage acquisition unit and current acquisition unit; Described impulse current generator, be connected between described processor and tower grounding body, when receiving the triggering command of described processor, produces incident current, and described incident current is injected to described tower grounding body; Described voltage acquisition unit, be connected between described tower grounding body and described processor, from described tower grounding body, gathers voltage, and the described magnitude of voltage gathered is sent to described processor; Described current acquisition unit, be connected between described tower grounding body and described processor, from described tower grounding body, gathers electric current, and the described current value gathered is sent to described processor.
In this technical scheme, after system processor is received and is measured instruction, according to the charging voltage setting value, send the steering order to the capacitance group charging, trigger subsequently impulse current generator and produce incident current, inject grounding body, through Signal Pretreatment, after sample circuit and A/D conversion etc., be stored in data field, by processor, data are marked to conversion again, the rejecting abnormalities data, data smoothing, filtering, and convolutional calculation etc., obtain the voltage responsive of grounding body under the effect of standard lightning current, find out respectively the maximal value of lightning current and response voltage thereof, the two is divided by, obtain the impulse earthed resistance of grounding body under the effect of standard lightning wave.Wherein, built-in A/D module in processor, can directly be changed the data that gather, in order to further calculate the value of impulse earthed resistance.
In technique scheme, preferably, described voltage acquisition unit comprises RC divider, and described current acquisition unit comprises divertor.
In technique scheme, preferably, described impulse current generator comprises: dsp controller, be connected between described processor and power amplification unit, and when receiving the triggering command of described processor, output control signals to described power amplification unit; Described power amplification unit, be connected between described dsp controller and driver element, and the described control signal of described dsp controller output is carried out to power amplification, and the control signal after amplifying is sent to described driver element; Described driver element, be connected between described power amplification unit and switch element, according to the described switch element of described drive obtained; Described switch element, be connected between described driver element and capacitance group, and according to the driving signal of described driver element, conducting and/or cutoff switch, to control the charge or discharge of described capacitance group; Described capacitance group, comprise a plurality of electric capacity, according to conducting and/or the cut-off of described switch element, charged and/or discharge, to produce described incident current in the charging and discharging process.
In this technical scheme, first the capacitor group is slowly charged, again to the rapid discharge of capacitor group, so just can produce the dash current needed after having charged.
In technique scheme, preferably, described impulse current generator also comprises: high voltage source unit is used to described capacitance group that charge power supply is provided; The voltage-regulation unit, be connected in described high voltage source unit, for regulating the size of described charge power supply.
In this technical scheme, the voltage-regulation unit can adopt potentiometer, can control the output valve of voltage by regulator potentiometer.
In technique scheme, preferably, also comprise: storage unit, be connected in described processor, store described magnitude of voltage and described current value that described processor receives, and the described Tower Impulse Grounding Resistance value result obtained after the processing of described processor.
In technique scheme, preferably, also comprise: display unit, be connected in described processor, the described Tower Impulse Grounding Resistance value result that described processor is obtained is shown.
In technique scheme, preferably, described display unit comprises: display screen and/or pilot lamp.
In this technical scheme, process the Tower Impulse Grounding Resistance value result obtain and may be displayed on display screen, so that the checking of user.
In technique scheme, preferably, also comprise: voltage transformation module, the DC voltage that supply voltage is transformed into to different sizes is supplied with described processor, described impulse current generator, described storage unit and described display unit.
Wherein, the grade of the DC voltage after voltage transformation module conversion can comprise: ± 5V (altogether and voltage stabilizing) ,+20V (altogether and voltage stabilizing), ± 12V (altogether without voltage stabilizing) and+3.3V (altogether and voltage stabilizing) voltage, the voltage of such different brackets can provide DC voltage for above-mentioned different unit.
In technique scheme, preferably, described power amplification unit comprises the light-coupled isolation amplifier, and described switch element comprises igbt.
Wherein, igbt (IGBT), it is that field effect transistor MOSFET and power transistor GTR are integrated in to a multiple device on chip.MOSFET is monopole type voltage driver part, and operating rate is fast, and input impedance is high, Heat stability is good, and driving circuit is simple, but conducting resistance is larger, and current capacity is also lower; GTR is ambipolar current driving apparatus, and its blocking voltage is high, and current capacity is strong, but operating rate is slower, and drive current is larger, and control circuit is more complicated.And IGBT combines the advantage of MOSFET and GTR, be well suited for the switch as the high-voltage great-current device.
In technique scheme, preferably, described processor comprises the TMS320F28335 chip.
In this technical scheme, select the chip that integrated level is high, so just can the minimizing system in component number, thereby reduce system area and volume.As employing includes sampling, maintenance and reference voltage, the dsp chip of high integration, as the chip that can select model to be TMS320F28335.
By above technical scheme, can improve the precision that impulse earthed resistance is measured, the simplified measurement circuit, cost-saving simultaneously.
At this, it will be understood by a person skilled in the art that above-mentioned each unit module can adopt multiple existing product to realize, includes but not limited to following example:
Processor can adopt the chip that model is TMS320F28335;
Impulse current generator can adopt the heavy current impact current feedback circuit that model is PL-BQS;
Voltage acquisition unit can adopt FRC series voltage divider;
The current acquisition unit can adopt the shunt of FL-2 type or FL-1 type;
Power amplification unit can adopt TLP521 optocoupler amplifier;
Driver element can adopt the EXB841 driver module;
Switch element can adopt igbt transistor;
High voltage source unit can adopt WA5D3 series high voltage power module;
The voltage-regulation unit can adopt potentiometer;
Storage unit can adopt the storer of 24C04 series, with the data to producing in processor, is stored;
Display unit can adopt the display screen that model is MSGl2864, certainly, also can select charactron to show;
Voltage transformation module can be selected the DC converter of TDC series etc.
The accompanying drawing explanation
Fig. 1 shows the structural drawing according to the Tower Impulse Grounding Resistance measurement mechanism of embodiment of the present utility model;
Fig. 2 shows the structural drawing according to the impulse current generator of embodiment of the present utility model.
Embodiment
In order more clearly to understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.It should be noted that, in the situation that do not conflict, the application's embodiment and the feature in embodiment can combine mutually.
A lot of details have been set forth in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection domain of the present utility model is not subject to the restriction of following public specific embodiment.
Fig. 1 shows the structural drawing according to the Tower Impulse Grounding Resistance measurement mechanism of embodiment of the present utility model.
As shown in Figure 1, according to Tower Impulse Grounding Resistance measurement mechanism of the present utility model, comprise: processor 102, be connected in impulse current generator 104, when receiving measuring command, trigger impulse current generator 104, and the magnitude of voltage that will receive from voltage acquisition unit 106 and current acquisition unit 108 and current value carry out convolutional calculation etc. and process operation, to obtain described Tower Impulse Grounding Resistance value result; Described impulse current generator 104, be connected between described processor 102 and tower grounding body 110, when receiving the triggering command of described processor 102, produces incident current, and described incident current is injected to described tower grounding body 110; Described voltage acquisition unit 106, be connected between described tower grounding body 110 and described processor 102, from described tower grounding body, gathers voltage, and the described magnitude of voltage gathered is sent to described processor 102; Described current acquisition unit 108, be connected between described tower grounding body 110 and described processor 102, from described tower grounding body 110, gathers electric current, and the described current value gathered is sent to described processor 102.
In this technical scheme, after system processor is received and is measured instruction, according to the charging voltage setting value, send the steering order to the charging of capacitor group, trigger subsequently impulse current generator and produce incident current, inject grounding body, through Signal Pretreatment, after sample circuit and A/D conversion etc., stored, by processor, data are marked to conversion again, the rejecting abnormalities data, data smoothing, filtering, and convolutional calculation etc., obtain the voltage responsive of grounding body under the effect of standard lightning current, find out respectively the maximal value of lightning current and response voltage thereof, the two is divided by, obtain the impulse earthed resistance of grounding body under the effect of standard lightning wave.Wherein, built-in A/D module in processor, can directly be changed the data that gather, in order to further calculate the value of impulse earthed resistance.
In technique scheme, preferably, also comprise: storage unit 112 is connected in described processor 102, store described magnitude of voltage and described current value that described processor receives, and the described Tower Impulse Grounding Resistance value result obtained after the processing of described processor.
In this technical scheme, storage unit can adopt storer, with the data to producing in processor, is stored.
In technique scheme, preferably, also comprise: display unit 114, be connected in described processor 102, the described Tower Impulse Grounding Resistance value result that described processor is obtained is shown.
In technique scheme, preferably, described display unit comprises: display screen and/or pilot lamp.
In this technical scheme, process the Tower Impulse Grounding Resistance value result obtain and may be displayed on display screen, so that the checking of user.
In technique scheme, preferably, also comprise: voltage transformation module, the DC voltage that supply voltage is transformed into to different sizes is supplied with described processor, described impulse current generator, described storage unit and described display unit.
Wherein, the grade of the DC voltage after voltage transformation module conversion can comprise: ± 5V (altogether and voltage stabilizing) ,+20V (altogether and voltage stabilizing), ± 12V (altogether without voltage stabilizing) and+3.3V (altogether and voltage stabilizing) voltage, the voltage of such different brackets can provide DC voltage for above-mentioned different unit.
In technique scheme, preferably, described power amplification unit comprises the light-coupled isolation amplifier, and described switch element comprises transistor.
In this technical scheme, power amplification unit adopts the light-coupled isolation amplifier, not only can be amplified signal, can also, by signal and subsequent conditioning circuit isolation, avoid being subject to the interference of late-class circuit simultaneously.
In technique scheme, preferably, described transistor comprises igbt.
In this technical scheme, igbt (IGBT), it is that field effect transistor MOSFET and power transistor GTR are integrated in to a multiple device on chip.MOSFET is monopole type voltage driver part, and operating rate is fast, and input impedance is high, Heat stability is good, and driving circuit is simple, but conducting resistance is larger, and current capacity is also lower; GTR is ambipolar current driving apparatus, and its blocking voltage is high, and current capacity is strong, but operating rate is slower, and drive current is larger, and control circuit is more complicated.And IGBT combines the advantage of MOSFET and GTR, can be used as the switch of high-voltage great-current device.
In technique scheme, preferably, described processor 102 comprises the height integrated chip.
In this technical scheme, select the chip that integrated level is high, so just can the minimizing system in component number, thereby reduce system area and volume, and then reach cost-saving purpose.Such as, processor can adopt and include sampling, maintenance and reference voltage, the TMS320F28335 chip of high integration.
Fig. 2 shows the structural drawing according to the impulse current generator of embodiment of the present utility model.
As shown in Figure 2, according to the impulse current generator 104 of embodiment of the present utility model, it can be divided into live part and discharge portion.Wherein, live part comprises: dsp controller 202A, be connected between described processor 102 and power amplification unit 204A, and when receiving the triggering command of described processor 102, the output charging control signal is to described power amplification unit 204A; Described power amplification unit 204A, be connected between described dsp controller 202A and driver element 206A, and the charging control signal that described dsp controller 202A is exported carries out power amplification, and the control signal after amplifying is sent to described driver element 206A; Described driver element 206A, be connected between described power amplification unit 204A and switch element 208A, according to the described switch element 208A of described drive obtained; Described switch element 208A, be connected between described driver element 206A and capacitance group 209, and for the driving signal according to described driver element 206A, actuating switch, to control the charging of described capacitance group; Preferably, the live part of described impulse current generator 200 also comprises: high voltage source unit 210 is connected between capacitance group 209 and switch element 208A, when switch element 208A conducting, for described capacitance group provides charge power supply; Described capacitance group 209, comprise a plurality of electric capacity, when described switch element 208A conducting, charged; In order to meet different charging voltage requirements, also added voltage-regulation unit 212, voltage-regulation unit 212 is connected in described high voltage source unit 210, for regulating the size of described charge power supply.
Concrete, the course of work of live part is: as dsp controller 202A when receiving the triggering command of described processor 102, send charging control signal, power amplification unit 204A carries out power amplification to this signal, and send to driver element 206A, driver element 206A makes switch element 208A actuating switch according to this charging signals, thereby make high voltage source unit 210 for capacitance group 209 chargings, and, when switch element 208A transfers the switch cut-off state to, high voltage source unit 210 stops as capacitance group 209 chargings.Now, can start discharge portion.
And the discharge portion of impulse current generator 200 comprises: dsp controller 202B, be connected between described processor 102 and power amplification unit 204B, be connected in power amplification unit 204B when receiving the triggering command of described processor 102, the output discharge control signal is to described power amplification unit 204B; Described power amplification unit 204B, be connected between described dsp controller 202B and driver element 206B, discharge control signal to described dsp controller 202B output carries out power amplification, and the control signal after amplifying is sent to described driver element 206B, so that obtaining, described driver element 206B drives signal; Described driver element 206B, be connected between described power amplification unit 204B and switch element 208B, according to the described switch element 208B of described drive obtained; Described switch element 208B, be connected between described driver element 206B and capacitance group 209, for the driving signal according to described driver element 206B, makes switch element 208B actuating switch, to control the electric discharge of described capacitance group 209.Impulse current generator is in the charging and discharging process like this, just produced the incident current that needs to inject tower grounding body 110, incident current is injected to the tower grounding body, can gather its magnitude of voltage and current value, according to magnitude of voltage and current value, calculate Tower Impulse Grounding Resistance.
In a kind of preferred exemplary, the dsp controller of live part and the dsp controller of discharge portion can adopt a dsp controller, further, can also directly use processor to go to export control signal, thereby reach the purpose of saving element.
Preferably, can also between the switch element of live part and capacitance group, add current-limiting resistance and diode, so that capacitance group can be charged slowly, so first the capacitor group is slowly charged, after having charged again to the rapid discharge of capacitor group, thereby produce the incident current that tower grounding body 110 needs.
By technique scheme, can obtain larger dash current, thus the precision improve detected, simultaneously owing to adopting high integrated control chip, can the simplified measurement circuit, cost-saving.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a Tower Impulse Grounding Resistance measurement mechanism, is characterized in that, comprising:
Processor, be connected in impulse current generator, when receiving measuring command, triggers impulse current generator, and obtain described Tower Impulse Grounding Resistance value result according to the magnitude of voltage and the current value that receive from voltage acquisition unit and current acquisition unit;
Described impulse current generator, be connected between tower grounding body and described processor, when receiving the triggering command of described processor, produces incident current, and described incident current is injected to described tower grounding body;
Described voltage acquisition unit, be connected between described tower grounding body and described processor, from described tower grounding body, gathers voltage, and the described magnitude of voltage gathered is sent to described processor;
Described current acquisition unit, be connected between described tower grounding body and described processor, from described tower grounding body, gathers electric current, and the described current value gathered is sent to described processor.
2. Tower Impulse Grounding Resistance measurement mechanism according to claim 1, is characterized in that, described impulse current generator comprises:
Dsp controller, be connected between power amplification unit and described processor, when receiving the triggering command of described processor, outputs control signals to described power amplification unit;
Described power amplification unit, be connected between driver element and described dsp controller, and the described control signal of described dsp controller output is carried out to power amplification, and the control signal after amplifying is sent to described driver element;
Described driver element, be connected between switch element and described power amplification unit, according to the described switch element of described drive obtained;
Described switch element, be connected between capacitance group and described driver element, and according to the driving signal of described driver element, conducting and/or cutoff switch, with charging and/or the electric discharge of controlling described capacitance group;
Described capacitance group, be connected in described switch element, comprises a plurality of electric capacity, according to conducting and/or the cut-off of described switch element, charged and/or discharge, to produce described incident current in the charging and discharging process.
3. Tower Impulse Grounding Resistance measurement mechanism according to claim 2, is characterized in that, described impulse current generator also comprises:
High voltage source unit, be connected between described switch element and capacitance group, for described capacitance group provides charge power supply;
The voltage-regulation unit, be connected to described high voltage source unit and described dsp controller, regulates the size of described charge power supply.
4. Tower Impulse Grounding Resistance measurement mechanism according to claim 1, is characterized in that, also comprises:
Storage unit, be connected in described processor, stores described magnitude of voltage and described current value that described processor receives, and the described Tower Impulse Grounding Resistance value result obtained after the processing of described processor.
5. Tower Impulse Grounding Resistance measurement mechanism according to claim 1, is characterized in that, also comprises:
Display unit, be connected in described processor, and the described Tower Impulse Grounding Resistance value result that described processor is obtained is shown.
6. Tower Impulse Grounding Resistance measurement mechanism according to claim 5, is characterized in that, described display unit comprises: display screen and/or pilot lamp.
7. Tower Impulse Grounding Resistance measurement mechanism according to claim 1, is characterized in that, also comprises:
Voltage transformation module, the DC voltage that supply voltage is transformed into to different sizes is supplied with described processor, described impulse current generator, storage unit and display unit.
8. Tower Impulse Grounding Resistance measurement mechanism according to claim 2, is characterized in that, described power amplification unit comprises the light-coupled isolation amplifier, and described switch element comprises igbt.
9. Tower Impulse Grounding Resistance measurement mechanism according to claim 1, is characterized in that, described voltage acquisition unit comprises RC divider, and described current acquisition unit comprises divertor.
10. according to the described Tower Impulse Grounding Resistance measurement mechanism of any one in claim 1 to 9, it is characterized in that, described processor comprises the TMS320F28335 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320356246 CN203365555U (en) | 2013-06-20 | 2013-06-20 | Tower impulse grounding resistance measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320356246 CN203365555U (en) | 2013-06-20 | 2013-06-20 | Tower impulse grounding resistance measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203365555U true CN203365555U (en) | 2013-12-25 |
Family
ID=49813300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320356246 Expired - Fee Related CN203365555U (en) | 2013-06-20 | 2013-06-20 | Tower impulse grounding resistance measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203365555U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792433A (en) * | 2014-02-21 | 2014-05-14 | 国家电网公司 | Measuring method using spark coefficient for correcting low-amplitude value impact resistance of tower grounding device |
| CN104977492A (en) * | 2015-07-31 | 2015-10-14 | 国网上海市电力公司 | 10kV power distribution pole grounding state evaluation system and 10kV power distribution pole grounding state evaluation method |
| CN105277795A (en) * | 2015-10-10 | 2016-01-27 | 安徽中普盛德电子科技有限公司 | Grounding impedance monitoring collecting analyzer |
| CN105676140A (en) * | 2016-01-26 | 2016-06-15 | 山东科技大学 | Precise load current generator of lithium battery |
| CN105842542A (en) * | 2016-04-13 | 2016-08-10 | 云南电网有限责任公司电力科学研究院 | Grounding device impacted grounding resistance measuring method and system |
| CN106569038A (en) * | 2016-09-28 | 2017-04-19 | 国网山西省电力公司阳泉供电公司 | Method for testing impulse grounding resistance of pole of power transmission line |
| CN107102208A (en) * | 2017-04-25 | 2017-08-29 | 南方电网科学研究院有限责任公司 | The measuring method and device of a kind of impulse earthed resistance |
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
-
2013
- 2013-06-20 CN CN 201320356246 patent/CN203365555U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792433A (en) * | 2014-02-21 | 2014-05-14 | 国家电网公司 | Measuring method using spark coefficient for correcting low-amplitude value impact resistance of tower grounding device |
| CN104977492A (en) * | 2015-07-31 | 2015-10-14 | 国网上海市电力公司 | 10kV power distribution pole grounding state evaluation system and 10kV power distribution pole grounding state evaluation method |
| CN105277795A (en) * | 2015-10-10 | 2016-01-27 | 安徽中普盛德电子科技有限公司 | Grounding impedance monitoring collecting analyzer |
| CN105277795B (en) * | 2015-10-10 | 2019-02-26 | 安徽天玄智能科技有限公司 | A kind of impedance ground monitoring acquisition and analysis instrument |
| CN105676140A (en) * | 2016-01-26 | 2016-06-15 | 山东科技大学 | Precise load current generator of lithium battery |
| CN105842542A (en) * | 2016-04-13 | 2016-08-10 | 云南电网有限责任公司电力科学研究院 | Grounding device impacted grounding resistance measuring method and system |
| CN106569038A (en) * | 2016-09-28 | 2017-04-19 | 国网山西省电力公司阳泉供电公司 | Method for testing impulse grounding resistance of pole of power transmission line |
| CN107102208A (en) * | 2017-04-25 | 2017-08-29 | 南方电网科学研究院有限责任公司 | The measuring method and device of a kind of impulse earthed resistance |
| CN107102208B (en) * | 2017-04-25 | 2019-08-02 | 南方电网科学研究院有限责任公司 | A kind of measurement method and device of impulse earthed resistance |
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
| CN113608031B (en) * | 2021-08-04 | 2024-02-02 | 北京英瑞来科技有限公司 | Impact impedance monitoring method and device for substation lightning arrester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203365555U (en) | Tower impulse grounding resistance measuring device | |
| CN203387218U (en) | USB charger with battery pole electric quantity display | |
| CN203324381U (en) | Portable pole tower grounding device impulse grounding resistance measuring device | |
| CN104917461B (en) | A kind of Satellite vapour image Orbital detection circuit | |
| CN202424548U (en) | Energy obtaining unit and passive high voltage on-line monitoring device | |
| CN103207363B (en) | A kind of instrument measuring solar cell parameter | |
| CN207383536U (en) | A kind of ultrasonic electronic cigarette chases after frequency circuit and ultrasonic electronic cigarette | |
| CN101650389A (en) | Method and instrument for measuring shock ground resistance of transmission line tower | |
| CN105738836A (en) | DC/DC converter automatic test system | |
| CN202631651U (en) | Filth insulation intelligent detection system apparatus | |
| CN102998603A (en) | Device and method for measuring impact current divergence characteristics of earth electrode | |
| CN104682521A (en) | Supercapacitor real-time detection system and method for variable-pitch control system of wind generating set | |
| CN105897161B (en) | A kind of test method of the outdoor photovoltaic module detecting system based on dynamic capacity charge and discharge | |
| CN202870287U (en) | Calibration pulse generator used in partial discharge measurement | |
| CN204462257U (en) | Capacity of super capacitor and DC internal resistance pick-up unit | |
| CN203519723U (en) | Wide range DC electric energy meter | |
| CN201876499U (en) | Tower impact grounding resistance measuring instrument | |
| CN203104067U (en) | Constant-pressure current limiting charger | |
| CN203397234U (en) | Power supply circuit | |
| CN203275927U (en) | Multifunctional control device applied to electric fire monitoring device | |
| CN108896952A (en) | Power grid exception simulated testing system and its test method | |
| CN203204077U (en) | Ground wire resistance real-time on-line measuring system and monitoring system | |
| CN202661551U (en) | Multifunctional miniwatt grounding impedance admeasuring apparatus | |
| CN103852623A (en) | Device for acquiring voltage and current of capacitive photovoltaic cell | |
| CN208432707U (en) | A kind of battery voltage acquisition circuit and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20150620 |
|
| EXPY | Termination of patent right or utility model |