CN202661551U - Multifunctional miniwatt grounding impedance admeasuring apparatus - Google Patents
Multifunctional miniwatt grounding impedance admeasuring apparatus Download PDFInfo
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- CN202661551U CN202661551U CN 201220382360 CN201220382360U CN202661551U CN 202661551 U CN202661551 U CN 202661551U CN 201220382360 CN201220382360 CN 201220382360 CN 201220382360 U CN201220382360 U CN 201220382360U CN 202661551 U CN202661551 U CN 202661551U
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Abstract
The utility model discloses a multifunctional miniwatt grounding impedance admeasuring apparatus. A reliable device for conducting comprehensive estimation on abutting device impedance is lacked at present. The technical scheme is that the multifunctional miniwatt grounding impedance admeasuring apparatus is characterized by comprising a battery, an inverter, a medium-high frequency power supply generation module and an impact power supply generation module, and the battery and the inverter provide current for the impact power supply generation module or/and the medium-high frequency power supply generation module. The multifunctional miniwatt grounding impedance admeasuring apparatus achieves measurement of earth resistivity, power frequency high-frequency impedance and impact impedance and is complete in function.
Description
Technical field
The utility model relates to the measuring equipment of electric system, a kind of Multi-functional low grid grounding impedance measurement instrument specifically, it is used for measuring ground connection power frequency, impact impedance and the soil resistivity of circuit on power system tower grounding device, also is no more than 50 meters earthing device impedance applicable to measuring other diameter lengths.
Background technology
The impedance of overhead line structures earthing device is to the anti-counterattack of circuit and safe operation important in inhibiting in the existing electric system, in the last thirty years, numerous researchists have done a large amount of research work to its power-frequency earthing impedance measurement, theoretical comparatively ripe with equipment, but the impact characteristics to the true performance of earthing device in the counterattack situation also rests on theoretical calculating and the laboratory simulation stage, lacks the Method and kit for of practical application.Existing large capacity percussion mechanism volume and weight is excessive, can't be transported to in-site measurement; And conventional miniwatt percussion mechanism can't reflect the soil ionisation effect that earthing device presents when large lightning current injects.Therefore, also lack at present a kind of reliably to earthing device impedance do the equipment of comprehensive assessment.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of portable Multi-functional low grid grounding impedance measurement instrument, it can solve the measurement problem of soil resistivity, power-frequency earthing impedance and impact impedance simultaneously, measurement result is by the anti-impact characteristics of shifting onto under the true lightning current of existing large capacity Impulse Test Result, for the comprehensive assessment of tower-footing impedance provides foundation.
For this reason, the utility model adopts following technical scheme: Multi-functional low grid grounding impedance measurement instrument, it is characterized in that, it comprises battery and inverter, medium-high frequency power supply generation module and impact power supply generation module, and battery and inverter provide electric current to impacting power supply generation module or/and medium-high frequency power supply generation module.
As the further of technique scheme improved and replenish, the utility model is taked following technical measures:
Described battery and inverter are comprised of the two-way inverter of energy-storage battery group and series connection with it.To the charging of energy-storage battery group, during power supply, give by two-way inverter and impact power supply generation module or/and medium-high frequency power supply generation module for power supply by the energy-storage battery group behind two-way inverter for extraneous AC power.Alternating current after the frequency conversion obtains the required surge waveform of impulse test and output through overbump generation module, finishes impact impedance and measures.
Described medium-high frequency power supply generation module comprises battery, unidirectional inverter, power transfer relay, intermediate frequency resonant power, frequency control screen and high-frequency resonant power supply, battery is connected with power transfer relay after inverter is connected with being connected, the intermediate frequency resonant power is connected with power transfer relay with the high-frequency resonant power supply and is connected, and described frequency control screen is connected with the high-frequency resonant power supply with the intermediate frequency resonant power respectively.In the middle of high frequency electric source generation module carry dead battery the time, provide electric current by battery and inverter.
The external load of the output of described intermediate frequency resonant power and high-frequency resonant power supply is provided with a measuring unit between intermediate frequency resonant power and high-frequency resonant power supply and the load, and described measuring unit comprises that curtage probe, voltage divider and capture card are in series.Capture card is connected with computer or industrial computer by data line.
Described impact power supply generation module comprises constant-current charge unit, high voltage control unit, high-voltage charging unit, high-voltage rectifying unit, impulse capacitor, harmonic unit, impacts trigger element and impact touch-screen, described constant-current charge unit, high voltage control unit, high-voltage charging unit, high-voltage rectifying unit and impulse capacitor are connected successively, be connected with impulse capacitor after impacting touch-screen and impacting the trigger element series connection, the harmonic unit is connected with impulse capacitor.
The external load of the output of described harmonic unit and impulse capacitor is provided with a measuring unit between harmonic unit and impulse capacitor and the load, described measuring unit is in series by curtage probe, voltage divider and capture card.
The utlity model has following beneficial effect: 1. realized the measurement of soil resistivity, power frequency high-frequency resistance, impact impedance, function is complete; 2. impact impedance is measured on true tower grounding device and can be obtained the waveform consistent with true lightning current; 3. good portability is fit to the work of open-air mountain area; 4. power frequency and high frequency earthing impedance measurement realize multifrequency point output, common external disturbance problem in the time of can effectively avoiding measuring; 5. the impact impedance analysis combines the low-power measurement result with existing large impact current testing result, and anti-knot fruit can better be reflected the impact characteristics of true earthing device.
Description of drawings
Fig. 1 is the utility model medium-high frequency power supply generation module and the principle schematic that is connected with load, measuring unit thereof.
Fig. 2 is the principle schematic that the utility model impacts power supply generation module and is connected with load, measuring unit.
Fig. 3 is the principle schematic of the utility model battery and inverter.
Fig. 4 is the utility model measuring unit and the principle schematic that is connected with load, medium-high frequency power supply generation module (or impacting power supply generation module) thereof.
Embodiment
Below in conjunction with specification drawings and specific embodiments the utility model is further described.
Multi-functional low grid grounding impedance measurement instrument shown in Fig. 1-4, it is comprised of battery and inverter, medium-high frequency power supply generation module and impact power supply generation module, and described battery and inverter are comprised of the two-way inverter of energy-storage battery group and series connection with it.Energy-storage battery group in battery and the inverter provides electric current to impacting power supply generation module, central high frequency electric source generation module carry dead battery the time, provide electric current by the energy-storage battery group in battery and the inverter.
Described medium-high frequency power supply generation module is comprised of battery, unidirectional inverter, power transfer relay, intermediate frequency resonant power, frequency control screen and high-frequency resonant power supply, battery is connected with power transfer relay after inverter is connected with being connected, the intermediate frequency resonant power is connected with power transfer relay with the high-frequency resonant power supply and is connected, and described frequency control screen is connected with the high-frequency resonant power supply with the intermediate frequency resonant power respectively.Described impact power supply generation module is comprised of constant-current charge unit, high voltage control unit, high-voltage charging unit, high-voltage rectifying unit, impulse capacitor, harmonic unit, impact trigger element and impact touch-screen, described constant-current charge unit, high voltage control unit, high-voltage charging unit, high-voltage rectifying unit and impulse capacitor are connected successively, be connected with impulse capacitor after impacting touch-screen and impacting the trigger element series connection, the harmonic unit is connected with impulse capacitor.
The output external load of intermediate frequency resonant power and high-frequency resonant power supply, be provided with measuring unit between intermediate frequency resonant power and high-frequency resonant power supply and the load, the output external load of harmonic unit and impulse capacitor, be provided with measuring unit between harmonic unit and impulse capacitor and the load, described measuring unit is in series by curtage probe, voltage divider and capture card.
The above only is preferred embodiment of the present utility model, is not structure of the present utility model is done any pro forma restriction.Every foundation technical spirit of the present utility model all falls in the protection domain of the present utility model any simple modification, equivalent variations and modification that above embodiment does.
Claims (6)
1. Multi-functional low grid grounding impedance measurement instrument, it is characterized in that, it comprises battery and inverter, medium-high frequency power supply generation module and impact power supply generation module, and battery and inverter provide electric current to impacting power supply generation module or/and medium-high frequency power supply generation module.
2. Multi-functional low grid grounding impedance measurement instrument according to claim 1 is characterized in that, described battery and inverter are comprised of the two-way inverter of energy-storage battery group and series connection with it.
3. Multi-functional low grid grounding impedance measurement instrument according to claim 1 and 2, it is characterized in that, described medium-high frequency power supply generation module comprises battery, unidirectional inverter, power transfer relay, intermediate frequency resonant power, frequency control screen and high-frequency resonant power supply, battery is connected with power transfer relay after inverter is connected with being connected, the intermediate frequency resonant power is connected with power transfer relay with the high-frequency resonant power supply and is connected, and described frequency control screen is connected with the high-frequency resonant power supply with the intermediate frequency resonant power respectively.
4. Multi-functional low grid grounding impedance measurement instrument according to claim 3, it is characterized in that, the external load of the output of described intermediate frequency resonant power and high-frequency resonant power supply, be provided with a measuring unit between intermediate frequency resonant power and high-frequency resonant power supply and the load, described measuring unit comprises that curtage probe, voltage divider and capture card are in series.
5. Multi-functional low grid grounding impedance measurement instrument according to claim 1 and 2, it is characterized in that, described impact power supply generation module comprises constant-current charge unit, high voltage control unit, high-voltage charging unit, high-voltage rectifying unit, impulse capacitor, harmonic unit, impacts trigger element and impact touch-screen, described constant-current charge unit, high voltage control unit, high-voltage charging unit, high-voltage rectifying unit and impulse capacitor are connected successively, be connected with impulse capacitor after impacting touch-screen and impacting the trigger element series connection, the harmonic unit is connected with impulse capacitor.
6. Multi-functional low grid grounding impedance measurement instrument according to claim 5, it is characterized in that, the external load of the output of described harmonic unit and impulse capacitor, be provided with a measuring unit between harmonic unit and impulse capacitor and the load, described measuring unit is in series by curtage probe, voltage divider and capture card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220382360 CN202661551U (en) | 2012-08-03 | 2012-08-03 | Multifunctional miniwatt grounding impedance admeasuring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220382360 CN202661551U (en) | 2012-08-03 | 2012-08-03 | Multifunctional miniwatt grounding impedance admeasuring apparatus |
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| CN 201220382360 Expired - Fee Related CN202661551U (en) | 2012-08-03 | 2012-08-03 | Multifunctional miniwatt grounding impedance admeasuring apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675462A (en) * | 2013-12-17 | 2014-03-26 | 厦门红相电力设备股份有限公司 | Small-current lightning impulse grounding impedance testing method and device |
| CN105652093A (en) * | 2015-12-30 | 2016-06-08 | 国家电网公司 | Grounding device impact grounding impedance test method |
| CN106018896A (en) * | 2016-06-18 | 2016-10-12 | 国网辽宁省电力有限公司抚顺供电公司 | Special programmable power source for pole grounding resistance measuring device |
| CN109478695A (en) * | 2017-02-02 | 2019-03-15 | 株式会社Lg化学 | Device and method for selecting ground capacitor |
-
2012
- 2012-08-03 CN CN 201220382360 patent/CN202661551U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675462A (en) * | 2013-12-17 | 2014-03-26 | 厦门红相电力设备股份有限公司 | Small-current lightning impulse grounding impedance testing method and device |
| CN103675462B (en) * | 2013-12-17 | 2016-05-04 | 厦门红相电力设备股份有限公司 | Little electric current lightning impulse earth loop impedance test method and device thereof |
| CN105652093A (en) * | 2015-12-30 | 2016-06-08 | 国家电网公司 | Grounding device impact grounding impedance test method |
| CN106018896A (en) * | 2016-06-18 | 2016-10-12 | 国网辽宁省电力有限公司抚顺供电公司 | Special programmable power source for pole grounding resistance measuring device |
| CN109478695A (en) * | 2017-02-02 | 2019-03-15 | 株式会社Lg化学 | Device and method for selecting ground capacitor |
| CN109478695B (en) * | 2017-02-02 | 2021-11-26 | 株式会社Lg化学 | Apparatus and method for selecting grounded capacitors |
| US11415953B2 (en) | 2017-02-02 | 2022-08-16 | Lg Energy Solution, Ltd. | Apparatus and method for selecting ground capacitor |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20200803 |
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| CF01 | Termination of patent right due to non-payment of annual fee |