CN106569038A - Method for testing impulse grounding resistance of pole of power transmission line - Google Patents
Method for testing impulse grounding resistance of pole of power transmission line Download PDFInfo
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- CN106569038A CN106569038A CN201610859398.3A CN201610859398A CN106569038A CN 106569038 A CN106569038 A CN 106569038A CN 201610859398 A CN201610859398 A CN 201610859398A CN 106569038 A CN106569038 A CN 106569038A
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- dash current
- impulse
- resistance
- grounding resistance
- grounding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a method for testing the impulse grounding resistance of a pole of a power transmission line. The method includes the steps of adjusting the environmental parameters, impulse current type and impulse current signals according to predetermined testing rules, obtaining grounding resistance value of the pole of the power transmission line and current environmental parameters, acquiring impulse current signals received by a grounding device and feedback voltage response signals, calculating response voltage peak value and impulse current peak value through FFT transformation to further obtain impulse grounding resistance value, and analyzing the relation coefficient between the grounding resistance value and the impulse grounding resistance value, and the relation between the relation coefficient and the environmental parameters and impulse current type. A plurality types of impulse waves are output to simulate lightning current effect, so that impulse grounding resistance of line pole grounding devices of different structural types and soil conditions can be measured, and difference between the impulse grounding resistance and industrial frequency grounding resistance can be analyzed.
Description
Technical field
The invention belongs to field of power transmission.It is more particularly related to a kind of shock ground resistance of transmission line tower
Method of testing.
Background technology
When dash current flows through grounding device, it is assumed that grounding device above earth potential peak value flows into electricity in ground with by grounding body
The ratio of stream is impulse earthed resistance, and because impulse earthed resistance measures inaccurate, big face is often caused due to thunderbolt
Product has a power failure and casualties, therefore the accurate measurement of electric line Tower Impulse Grounding Resistance is particularly important, it is ensured that neighbouring people
The safety of member and the stable operation of transmission line of electricity system.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
Above-mentioned in order to solve the problems, such as, the present invention proposes a kind of shock ground resistance of transmission line tower method of testing, its
Comprise the following steps：
According to predetermined test order adjustment ambient parameter, dash current type and dash current signal；
The grounding resistance and current ambient parameter of electric power line pole tower are obtained, ambient parameter includes humidity value, temperature
Value and field strength values and soil parameters, and humidity value, the multiple temperature that the multiple humidity detectors for receiving are transmitted
The field strength values that the temperature value and multiple magnetic field detection probe that detection means is transmitted is transmitted calculate respectively its meansigma methods；
Dash current signal and the voltage response signal of feedback that the grounding device of collection electric power line pole tower is received, and
Pass it through FFT and calculate response voltage peak, dash current peak value, so as to obtain impulse earthed resistance value；
Grounding resistance, impulse earthed resistance value, dash current type and the ring obtained according to predetermined test order
Relation pair between the parameter of border answers table, analysis to draw the coefficient of relationship between grounding resistance and impulse earthed resistance value, and
Relation between the coefficient of relationship and ambient parameter and dash current type.
Preferably, in described shock ground resistance of transmission line tower method of testing, also include believing dash current
Number and voltage response signal isolated and filtered, the process of analog digital conversion.
Preferably, in described shock ground resistance of transmission line tower method of testing, the predetermined test order
For：
One of them is variable to humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter, is impacted
Current type and dash current signal are constant, measure different ambient parameters to impacting the change of grounding resistance；
Humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter is quantitatively, dash current class
Type is constant, and dash current signal is variable, measures different size of dash current signal to impacting the change of grounding resistance；
Humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter is quantitatively, dash current letter
Number constant, dash current type is variable, measures different types of dash current to impacting the change of grounding resistance.
Preferably, in described shock ground resistance of transmission line tower test device, impact signal generating meanss bag
Include：
Charge circuit, it is connected when charging, and is disconnected after charging complete；
Discharge loop, it is connected in electric discharge.
Capacitor, it is connected with the charge circuit and the discharge loop；
Controller, it is used to receive measuring command and control charge circuit to be charged capacitor, is additionally operable to charging
Charge circuit is disconnected when completing and discharge loop is triggered and is produced in the grounding device that dash current injects electric power line pole tower, also used
Can change the size of dash current signal in the size of the charge volume by changing capacitor.
The present invention proposes a kind of shock ground resistance of transmission line tower method of testing, and it is comprised the following steps：According to pre-
Fixed test order adjusts ambient parameter, dash current type and dash current signal；Obtain the ground connection electricity of electric power line pole tower
Resistance and current ambient parameter, ambient parameter includes humidity value, temperature value and field strength values, and multiple wet by what is received
The magnetic that the temperature value and multiple magnetic field detection probe that the degree humidity value that transmits of detection means, multiple temperature-detecting devices are transmitted is transmitted
Field intensity value calculates respectively its meansigma methods；The dash current signal that receives of grounding device of collection electric power line pole tower and anti-
The voltage response signal of feedback, and pass it through FFT calculate response voltage peak, dash current peak value, so as to be rushed
Hit grounding resistance；The grounding resistance that obtained according to predetermined test order, impulse earthed resistance value, dash current type with
And the relation pair between ambient parameter answers table, analysis to draw the coefficient of relationship between grounding resistance and impulse earthed resistance value,
And the relation between the coefficient of relationship and ambient parameter and dash current type.Can respectively draw electric power line pole tower is not turned off
In the case of foot ground connection and aerial earth wire, lightning current operative condition is simulated by exporting the shock wave of various ways, realized
To different types of structure, the measurement of the overhead line structures grounding device impulse earthed resistance of soil regime, com-parison and analysis impulse grounding
The difference of resistance and power frequency earthing resistance, and the shadow of different types of structure, soil regime to grounding device impulse earthed resistance
Ring, the lightning protection performance and electric power line pole tower the design of grounding to understand transmission line of electricity provides reference frame.
The further advantage of the present invention, target and feature embody part by description below, and part will also be by this
The research of invention and practice and be understood by the person skilled in the art.
Specific embodiment
Below the present invention is described in further detail, with make those skilled in the art with reference to specification word being capable of evidence
To implement.
It should be appreciated that it is used herein such as " have ", "comprising" and " including " term do not allot one or many
The presence or addition of individual other elements or its combination.
The present invention proposes a kind of shock ground resistance of transmission line tower method of testing, and it is comprised the following steps：
According to predetermined test order adjustment ambient parameter, dash current type and dash current signal；
The grounding resistance and current ambient parameter of electric power line pole tower are obtained, ambient parameter includes humidity value, temperature
Value and field strength values and soil parameters, and humidity value, the multiple temperature that the multiple humidity detectors for receiving are transmitted
The field strength values that the temperature value and multiple magnetic field detection probe that detection means is transmitted is transmitted calculate respectively its meansigma methods；
Dash current signal and the voltage response signal of feedback that the grounding device of collection electric power line pole tower is received, and
Pass it through FFT and calculate response voltage peak, dash current peak value, so as to obtain impulse earthed resistance value；
Grounding resistance, impulse earthed resistance value, dash current type and the ring obtained according to predetermined test order
Relation pair between the parameter of border answers table, analysis to draw the coefficient of relationship between grounding resistance and impulse earthed resistance value, and
Relation between the coefficient of relationship and ambient parameter and dash current type.
In described shock ground resistance of transmission line tower method of testing, also include being rung to impacting current signal and voltage
Induction signal is isolated and is filtered, the process of analog digital conversion.
In described shock ground resistance of transmission line tower method of testing, the predetermined test order is：
One of them is variable to humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter, is impacted
Current type and dash current signal are constant, measure different ambient parameters to impacting the change of grounding resistance；
Humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter is quantitatively, dash current class
Type is constant, and dash current signal is variable, measures different size of dash current signal to impacting the change of grounding resistance；
Humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter is quantitatively, dash current letter
Number constant, dash current type is variable, measures different types of dash current to impacting the change of grounding resistance.
In described shock ground resistance of transmission line tower test device, impact signal generating meanss include：
Charge circuit, it is connected when charging, and is disconnected after charging complete；
Discharge loop, it is connected in electric discharge.
Capacitor, it is connected with the charge circuit and the discharge loop；
Controller, it is used to receive measuring command and control charge circuit to be charged capacitor, is additionally operable to charging
Charge circuit is disconnected when completing and discharge loop is triggered and is produced in the grounding device that dash current injects electric power line pole tower, also used
Can change the size of dash current signal in the size of the charge volume by changing capacitor.
The enforcement of the present invention, can lead in the case where each pin ground connection of electric power line pole tower and aerial earth wire is not turned off
Cross the shock wave of output various ways to simulate lightning current operative condition, realize to different types of structure, the circuit of soil regime
The difference of the measurement of tower grounding device impulse earthed resistance, com-parison and analysis impulse earthed resistance and power frequency earthing resistance, and
The impact of different types of structure, soil regime to grounding device impulse earthed resistance, is the lightning protection for understanding transmission line of electricity
Energy and electric power line pole tower the design of grounding provide reference frame.Simultaneously related measure is researched and proposed by the invention
Suggestion and measure improves line lightning resisting level reducing the impulse resistance of grounding device, transmission line of electricity is not jumped easily in thunderbolt
Lock, it is ensured that the operation of electricity net safety stable.
The present invention produces dash current and injects in tower grounding device by impact signal source, and collection measurement apparatus are synchronously adopted
The voltage waveform of impulse current waveform and voltage pole P in collection injection earth mat, and by the data processing on signal pickup assembly
Computed in software, FFT etc. obtain the tower grounding device under the waveform standard lightning current waveform effect larger compared with steep, amplitude
Voltage response, finally by obtain response voltage peak, injection dash current peak value, impacted according to engineering definition formula
Grounding resistance.
In measurement, master control borad is received after measurement instruction, and according to charging voltage value the charge circuit of impact signal unit is controlled
Capacitor is charged.Charge circuit is disconnected after charging complete, discharge loop is then triggered and is produced dash current injection shaft tower
In grounding device；Meanwhile, signals collecting measurement partially-working, by through the voltage x current value analog digital conversion of signal isolation and filtering
Afterwards Treatment Analysis are carried out by data processing unit, obtain the voltage response under the effect of standard lightning current, find out this response voltage
Maximum, divided by dash current maximum, you can Tower Impulse Grounding Resistance value, and be sent to LCD liquid crystal display screen and show,
Support surge voltage and current waveform record ripple and display.
The present invention is based on small magnitude impulse current test principle, by producing amplitude less (ampere levels), a ripple
Shape meets the dash current of IEC thunder and lightning standards to simulate the operative condition of lightning current.Due to produced small magnitude dash current
The waveform parameter (wave head time and half time to peak) of test signal fully meets the thunder about IEC standard and national Specification
Electric wave waveform requirements, therefore it has also contained with the equally abundant high fdrequency components of true lightning wave, i.e. small magnitude dash current signal
Equivalent frequency it is identical with the equivalent frequency of induced lightening in the Nature, two kinds of standard lightning waves of direct lightning strike.Therefore, it can fully anti-
Mirror under the inductive effect under the effect of lightning current high frequency characteristics, namely heavy current impact effect and produce under small current percussion
Inductive effect be on all four.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in description and embodiment
With, it can be applied to completely various suitable the field of the invention, for those skilled in the art, can be easily
Other modification is realized, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details.
Claims (4)
1. shock ground resistance of transmission line tower method of testing, it is characterised in that comprise the following steps：
According to predetermined test order adjustment ambient parameter, dash current type and dash current signal；
Obtain electric power line pole tower grounding resistance and current ambient parameter, ambient parameter include humidity value, temperature value and
Field strength values and soil parameters, and humidity value, the multiple temperature detections that the multiple humidity detectors for receiving are transmitted
The field strength values that the temperature value and multiple magnetic field detection probe that device is transmitted is transmitted calculate respectively its meansigma methods；
The dash current signal that receives of grounding device of collection electric power line pole tower and the voltage response signal of feedback, and by its
Response voltage peak, dash current peak value are calculated through FFT, so as to obtain impulse earthed resistance value；
Grounding resistance, impulse earthed resistance value, dash current type and the environment ginseng obtained according to predetermined test order
Relation pair between number answers table, analysis to draw the coefficient of relationship between grounding resistance and impulse earthed resistance value, and the pass
Relation between coefficient and ambient parameter and dash current type.
2. shock ground resistance of transmission line tower method of testing as claimed in claim 1, it is characterised in that also including liquidating
Hit current signal and voltage response signal isolated and filtered, the process of analog digital conversion.
3. shock ground resistance of transmission line tower method of testing as claimed in claim 2, it is characterised in that described predetermined
Test order is：
One of them is variable to humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter, dash current
Type and dash current signal are constant, measure different ambient parameters to impacting the change of grounding resistance；
Humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter is quantitatively, and dash current type is not
Become, dash current signal is variable, measure different size of dash current signal to impacting the change of grounding resistance；
Humidity value, temperature value, field strength values and soil parameters in regulation ambient parameter is quantitatively, and dash current signal is not
Become, dash current type is variable, measure different types of dash current to impacting the change of grounding resistance.
4. shock ground resistance of transmission line tower test device as claimed in claim 3, it is characterised in that impact signal is sent out
Generating apparatus include：
Charge circuit, it is connected when charging, and is disconnected after charging complete；
Discharge loop, it is connected in electric discharge.
Capacitor, it is connected with the charge circuit and the discharge loop；
Controller, it is used to receive measuring command and control charge circuit to be charged capacitor, is additionally operable in charging complete
When disconnect charge circuit and trigger discharge loop produce dash current injection electric power line pole tower grounding device in, be additionally operable to lead to
Change the size of dash current signal by crossing the size of the charge volume for changing capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859398.3A CN106569038A (en) | 2016-09-28 | 2016-09-28 | Method for testing impulse grounding resistance of pole of power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859398.3A CN106569038A (en) | 2016-09-28 | 2016-09-28 | Method for testing impulse grounding resistance of pole of power transmission line |
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| Publication Number | Publication Date |
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| CN106569038A true CN106569038A (en) | 2017-04-19 |
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| CN201610859398.3A Pending CN106569038A (en) | 2016-09-28 | 2016-09-28 | Method for testing impulse grounding resistance of pole of power transmission line |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179444A (en) * | 2017-07-19 | 2017-09-19 | 国网辽宁省电力有限公司丹东供电公司 | Insulating resistance measuring device |
| CN108761208A (en) * | 2018-08-13 | 2018-11-06 | 西南交通大学 | A kind of test method of vertical demixing soil dynamic resistance |
| CN109188093A (en) * | 2018-08-13 | 2019-01-11 | 西南交通大学 | The nonlinear test method of electric resistance of soil under a kind of different pH values |
| CN109188092A (en) * | 2018-08-13 | 2019-01-11 | 西南交通大学 | Soil dynamic resistance characteristic test method under a kind of different temperatures |
| CN109188088A (en) * | 2018-08-13 | 2019-01-11 | 西南交通大学 | A kind of vertical demixing electric resistance of soil nonlinear characteristic test method |
| CN112595938A (en) * | 2020-12-03 | 2021-04-02 | 河南四达电力设备股份有限公司 | Method for evaluating adaptability of graphite-based flexible grounding device of overhead transmission line tower |
| CN115754828A (en) * | 2022-12-09 | 2023-03-07 | 广州力赛计量检测有限公司 | Lightning protection grounding device detection system and method for machine room |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107179444A (en) * | 2017-07-19 | 2017-09-19 | 国网辽宁省电力有限公司丹东供电公司 | Insulating resistance measuring device |
| CN108761208A (en) * | 2018-08-13 | 2018-11-06 | 西南交通大学 | A kind of test method of vertical demixing soil dynamic resistance |
| CN109188093A (en) * | 2018-08-13 | 2019-01-11 | 西南交通大学 | The nonlinear test method of electric resistance of soil under a kind of different pH values |
| CN109188092A (en) * | 2018-08-13 | 2019-01-11 | 西南交通大学 | Soil dynamic resistance characteristic test method under a kind of different temperatures |
| CN109188088A (en) * | 2018-08-13 | 2019-01-11 | 西南交通大学 | A kind of vertical demixing electric resistance of soil nonlinear characteristic test method |
| CN109188088B (en) * | 2018-08-13 | 2019-11-05 | 西南交通大学 | A kind of vertical demixing electric resistance of soil nonlinear characteristic test method |
| CN112595938A (en) * | 2020-12-03 | 2021-04-02 | 河南四达电力设备股份有限公司 | Method for evaluating adaptability of graphite-based flexible grounding device of overhead transmission line tower |
| CN112595938B (en) * | 2020-12-03 | 2023-08-22 | 河南四达电力设备股份有限公司 | Method for evaluating adaptability of graphite-based flexible grounding device of pole tower of overhead transmission line |
| CN115754828A (en) * | 2022-12-09 | 2023-03-07 | 广州力赛计量检测有限公司 | Lightning protection grounding device detection system and method for machine room |
| CN115754828B (en) * | 2022-12-09 | 2023-08-04 | 广州力赛计量检测有限公司 | Lightning protection grounding device detection system and method for machine room |
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