CN207007943U - A kind of test system of Transient grounding resistance - Google Patents
A kind of test system of Transient grounding resistance Download PDFInfo
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- CN207007943U CN207007943U CN201720913495.6U CN201720913495U CN207007943U CN 207007943 U CN207007943 U CN 207007943U CN 201720913495 U CN201720913495 U CN 201720913495U CN 207007943 U CN207007943 U CN 207007943U
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Abstract
This application discloses a kind of test system of Transient grounding resistance, based on artificially triggered lightning technology, the test electric current using lightning current as detection Transient grounding resistance.The test system includes for lightning current being injected into the impedance calculation device of the drainage bar of earthing or grounding means to be measured, the current measuring device for measuring lightning current, the voltage measuring apparatus of measurement response voltage and calculating Transient grounding resistance.In the test process for the Transient grounding resistance that the application provides, using lightning current as test electric current, compared with dash current is produced by impulse current generator and is used as test electric current, lightning current can reach hundred kA thunder and lightning waveform, and there is Return stroke, the sufficient spark discharge of soil can be made, so that earthing or grounding means to be measured reflects real lightning protection characteristic.Real lightning protection characteristic is showed according to earthing or grounding means to be measured, more have to earthing or grounding means to be measured can specific aim be designed or transform.
Description
Technical field
The application is related to high pressure Lightning protection field, more particularly to a kind of test system of Transient grounding resistance.
Background technology
When Transient grounding resistance refers to that dash current or lightning current scatter from earthing or grounding means to surrounding earth, medium is grounded
The impedance value that (soil, rock and friction reducer etc.) is presented.In actual applications, Transient grounding resistance is used to characterize ground connection dress
The lightning protection characteristic put.
At present, the measuring method of Transient grounding resistance includes experimental analogic method, and its measurement process is, using large-scale impact
Current feedback circuit generates dash current, and lightning current is simulated with the dash current；Dash current is injected into earthing or grounding means；Measurement impact
The impedance value that electric current is presented when flowing into the earth along earthing or grounding means, as Transient grounding resistance.
But there is larger gap, first, lightning current in the dash current that impulse current generator occurs with lightning current
Amplitude can reach hundred KA levels, and the amplitude of dash current is only capable of reaching ten KA levels.Secondly, lightning current in addition to including main discharge,
Multiple return stroke current also be present, and impulse current generator is influenceed by capacitor charge time, is extremely difficult to the short time
Interior multiple continuous discharge, i.e. dash current can not simulate the process that lightning current produces Return stroke electric current.Therefore, using impact
The impedance value of current measurement is not that lightning current flows into the real impedance value presented during earthing or grounding means.
Utility model content
This application provides the test system of Transient grounding resistance, to solve the Transient grounding resistance of prior art measurement not
The problem of accurately, truly reflecting the lightning protection characteristic of earthing or grounding means.
This application provides a kind of test system of Transient grounding resistance, the device includes,
The thunder carrying-off device and drainage bar being sequentially connected, one end that the thunder carrying-off device is not connected with the drainage bar are used to connect
The center of earthing or grounding means is surveyed in reception；
Current measuring device, the current measuring device include the first current meter, the first current meter quilt
It is configured to, the lightning current of earthing or grounding means to be measured is injected in measurement, and the lightning current of measurement is reached into impedance calculation device；
At least one voltage measuring apparatus, each voltage measuring apparatus include first voltage meter, first voltage
Meter is formulated into, and in the predetermined position away from earthing or grounding means center to be measured, is measured earthing or grounding means to be measured and is acted in lightning current
Response voltage caused by lower, and the response voltage of measurement is reached into impedance calculation device；
The impedance calculation device is used to, according to the lightning current and response voltage, calculate Transient grounding resistance.
Preferably, the system also includes electrical to optical converter and optical-electrical converter, the input point of the electrical to optical converter
First current meter and the first voltage meter are not connected, and the output end of the electrical to optical converter is connected by optical fiber
The input of the optical-electrical converter is connect, the electrical to optical converter is used to the lightning current and response voltage being respectively converted into phase
The electric current optical signal and voltage optical signal answered；
The output end of the optical-electrical converter connects the impedance calculation device, and the optical-electrical converter is used for the electricity
Optical signal and voltage optical signal are reduced to its corresponding lightning current and response voltage.
Preferably, the current measuring device also includes the second current attenuator, and second current attenuator is used for will
The default multiple of lightning current decay of the first current meter measurement.
Preferably, the voltage measuring apparatus also includes the second current attenuator, and the second voltage attenuator is used for will
The default multiple of response voltage attenuation of the first voltage meter detection.
From above technical scheme, the embodiment of the present application provides a kind of test system of Transient grounding resistance, based on people
Work draws thunder technology, and lightning current is injected into earthing or grounding means to be measured, earthing or grounding means to be measured is showed real lightning protection characteristic, so as to carry
The degree of accuracy of the Transient grounding resistance of high detection.The test system include drainage bar, current measuring device, voltage measuring apparatus with
And impedance calculation device, wherein, the lightning current that thunder carrying-off device gathers is injected into earthing or grounding means to be measured by drainage bar；Current measurement fills
Put the lightning current that earthing or grounding means to be measured is injected in measurement；Voltage measuring apparatus measurement earthing or grounding means to be measured under lightning current effect produces
Response voltage；Impedance calculation device calculates it than being worth to Transient grounding resistance according to the response voltage and lightning current of measurement.
In the test process for the Transient grounding resistance that the application provides, using spontaneous lightning current as test electric current, thunder and lightning
Flow after in the soil media that earthing or grounding means to be measured enters surrounding, can be substantially discharged the soil media of surrounding, then
Make earthing or grounding means to be measured that real lightning protection characteristic be presented, therefore, the Transient grounding resistance measured using this method can be more realistically
The lightning protection characteristic of earthing or grounding means to be measured under the conditions of reaction nature lightning.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of one embodiment of the test system of the application Transient grounding resistance；
Fig. 2 is the process for using figure of the test system of the application Transient grounding resistance；
Fig. 3 is that the application transmits lightning current with responding the flow chart of voltage；
Label in Fig. 1-3 is expressed as：1- thunder carrying-off devices, 2- drainage bars, 3- current measuring devices, the electricity of 31- first
Flowmeter measuring device, the current attenuators of 32- second, 4- voltage measuring apparatus, 41- first voltage meters, the decay of 42- second voltages
Device, 51- electricals to optical converter, 52- optical fiber, 53- optical-electrical converters, 6- impedance calculation devices, 7- sensing chamber, 8- ground connection dresses to be measured
Put.
Embodiment
Fig. 1 is the structural representation of one embodiment of the test system of the application Transient grounding resistance, as shown in figure 1,
The system includes thunder carrying-off device 1, drainage bar 2, current measuring device 3, at least one voltage measuring apparatus 4 and impedance calculation device
6.The output connection drainage bar 2 of thunder carrying-off device 1, the lightning current generated naturally is incorporated into ground by thunder carrying-off device 1, and reaches drainage
In bar 2.One end connection thunder carrying-off device 1 of drainage bar 2, the other end connect the center of earthing or grounding means 8 to be measured, and drainage bar 2 is by thunder and lightning
Stream is injected into earthing or grounding means to be measured.
Current measuring device 3 includes the first current meter 31, and the first current meter 31 is formulated into：Measurement injection is treated
The lightning current of earthing or grounding means 8 is surveyed, and the lightning current of measurement is reached into impedance calculation device 6.In the present embodiment, the metering of the first electric current
The input connection drainage bar 2 of device 31, its output end are connected to impedance calculation device 6.First current meter 31 is when drawing thunder
The amplitude of the lightning current on drainage bar 2 is measured, and the amplitude of the lightning current of measurement is reached into impedance calculation device 6.
Can be achieved electric current metering device have it is a variety of, for example, measuring coil or coaxial shunt etc., are not carried out to it herein
It is specific to limit.When specifically used, first current meter with suitable measuring range should be selected, lightning current peak value is no more than
The measurement range of first current meter, and the output valve of measurement apparatus is no more than the range of electro-optic device.
In order to improve the anti-interference of measurement apparatus, current measuring device 3 also includes the second current attenuator 32, i.e.,
One current meter 31 on the connection circuit of impedance calculation device 6 with connecting the second current attenuator 32.The attenuator can be by
The default multiple of lightning current decay of one current meter measurement.Those skilled in the art can be according to being actually needed, and selection is suitable
The attenuator of attenuation multiple, such as 10:1 or 100：1 attenuator etc..
Each voltage measuring apparatus 4 includes first voltage meter 41, and first voltage meter 41 is formulated into：Away from treating
The predetermined position at earthing or grounding means center is surveyed, measures earthing or grounding means 8 to be measured caused response voltage under lightning current effect, and will
The response voltage of measurement reaches impedance calculation device 6.
The connected mode of first voltage meter in circuit will be illustrated herein.In traditional connected mode,
The high-pressure side of first voltage meter input connects earthing or grounding means center to be measured, the low-pressure side connection ground stud of its input.
This connected mode is consistent with the zero potential defined (ground stud is connected with the earth, and it is no-voltage to define its voltage), therefore relatively holds
It is readily understood.But the survey crew in the measuring apparatus and peripheral region in its circuit will be in a high potential place all the time,
And the high potential place is not fully equal, i.e., certain voltage deviation in certain regional extent be present, if the voltage deviation is sufficient
It is enough big, then it can damage personal safety that is measuring apparatus and endangering survey crew.For example, it is assumed that high potential is 20,000 volts, deviation
For 1%, then the voltage deviation in the presence of 200 volts, the voltage deviation will jeopardize the safety of survey crew and measuring apparatus.In addition, adopt
A first voltage meter can only be connect during with this kind of connected mode, in circuit, if two first voltage meters are connect, then
Relative Zero potential position has two voltage differences, and actual entirely online voltage myopia is equal, causes two voltage measuring apparatus
Measurement result is identical, so that two zero potentials lose practical significance.
In order to avoid above mentioned problem, in the application, first voltage meter employs new connected mode.Fig. 1 is this Shen
Please Transient grounding resistance test system another embodiment structural representation, as shown in figure 1, first voltage meter exists
Connected mode in circuit is specially：The high-pressure side connection ground stud of the input of first voltage meter 41, first voltage metering
The low-pressure side of the input of device 41 connects the center of earthing or grounding means 8 to be measured；The output end of first voltage meter 41 is connected to impedance
Computing device 6.Voltage difference between the ground stud and earthing or grounding means to be measured of the measurement of first voltage meter is to respond voltage, so
The response voltage measured afterwards reaches impedance metering device.
Compared with traditional connected mode, the connected mode in the application can connect multiple first voltage meters simultaneously,
Therefore, in the measurable multi-group data of experiment process once, so as to which multi-group data is compared.In addition, in measurement process
In, the test equipment such as voltage measuring apparatus, current measuring device, optical fiber and survey crew are in zero potential or low potential place,
Be advantageous to ensure the safety of survey crew and measurement apparatus.
In example shown in this Fig. 1, only illustrated by taking 2 first voltage meters as an example, certainly, art technology
Personnel can be according to the quantity for being actually needed adjustment first voltage meter, such as 1,3,4,5 or 6 etc., the metering of its first voltage
Connected mode is same in circuit for device, is not repeating.Here, in the presence of a special situation, i.e., when first voltage is measured
When device is 1, connected mode that also can be traditional, measurement can be achieved, and do not influence in connected mode that the application can be used to provide
The data result of measurement.
Each potentiometer measuring device one ground stud of corresponding connection, in the embodiment shown in fig. 1, two first voltage meterings
Device is connected respectively a ground stud, and it is corresponding that each first voltage meter measures earthing or grounding means center to be measured respectively
Voltage difference between ground stud.
Here, the installation position of ground stud on the ground will be illustrated.By earthing or grounding means to be measured (such as grounded screen)
Equivalent catercorner length is set to l, then the installation position of ground stud is the kl opening positions apart from earthing or grounding means center to be measured, wherein,
According to conventional test experience, k>2.Equivalent catercorner length l be any two points of the earthing or grounding means to be measured on floor projection it
Between most long distance, such as square earthing or grounding means to be measured, its effective catercorner length l are cornerwise length；For another example it is circular
Earthing or grounding means to be measured, its effective catercorner length l be diameter length.
The corresponding kl of each ground stud, for example, in the embodiment shown in fig. 1, being set comprising 2 the first ground studs
Put, the ground stud of one connection is arranged on away from earthing or grounding means center k to be measured1L opening position, the ground stud of another connection are arranged on
For away from earthing or grounding means center k to be measured2L opening position, wherein, k1>2, k2>2。
Certainly, when ground stud is other quantity, each ground stud also uses identical setting.For example, first voltage
When the quantity of meter is 1, the quantity of ground stud is also 1, and it is located at the kl opening positions apart from earthing or grounding means center to be measured, its
In, the desirable any numbers more than 2 of k.For another example, the quantity of first voltage meter is n (n>2) when, the quantity of ground stud is also
N, it is located at the k apart from earthing or grounding means center to be measured respectively1l、k2l…knL opening positions, wherein, k1>2, k2>2 ..., knl>2。
In the test process of reality, by setting multiple first voltage meters, on the one hand, can be averaging by multi-group data
Method, exclusion special geology, landform cause the error of measurement data；On the other hand, can be grounded according to multi-group data Trend judgement
Whether the installation position of stake is appropriate, if data variation is very big, illustrates that k values are too small, need to relocate ground stud.
The device that voltage measurement can be achieved has a variety of, such as impulse voltage divider etc., it is not limited specifically herein.
When specifically used, the voltage test device with suitable measuring range should be selected, response voltage peak is no more than first voltage meter
The measurement range of measuring device, and the output valve of measurement apparatus is no more than the range of electro-optic device.
In order to improve the anti-interference of measurement apparatus, voltage measuring apparatus 4 also includes second voltage attenuator 41, i.e.,
One potentiometer measuring device 41 is with connecting second voltage attenuator 42 on the connection circuit of impedance calculation device 6.The attenuator can be by
The default multiple of response voltage attenuation of one potentiometer measuring device measurement.Those skilled in the art can be according to being actually needed, and selection is closed
The attenuator of suitable attenuation multiple, such as 10:1 or 100：1 attenuator etc..
Impedance calculation device 6 is used to, according to lightning current and response voltage, calculate Transient grounding resistance.Impulse grounding can be achieved
The device of impedance computation has a variety of, such as oscillograph etc., it is not limited specifically herein.In the present embodiment, oscillograph is more
Oscilloscope channel, lightning current can be met with being measured while multigroup response voltage.
Lightning current is a heavy current that can reach hundred kA levels, therefore, when it is flowed through in drainage bar 2, around drainage bar 2
A high-intensity magnetic field will be produced, the response voltage that the lightning current that current measuring device 3 measures measures with voltage measuring apparatus 4 is reaching
During impedance calculation device 6, inevitably it will be disturbed by the high-intensity magnetic field, so as to have impact on the accurate of test result
Degree.Therefore, in the application, electrical to optical converter 51 and optical-electrical converter 53 are set up.
The input of electrical to optical converter 51 connects the first current meter 3 and first voltage meter 4, electro-optic conversion respectively
The output end of device 51 connects the input of optical-electrical converter 53 by optical fiber 52, and electrical to optical converter 51 is used for lightning current and response
Voltage is respectively converted into corresponding electric current optical signal and voltage optical signal.The output end connection impedance computation dress of optical-electrical converter 53
6 are put, optical-electrical converter 53 is used to electric current optical signal and voltage optical signal being reduced to its corresponding lightning current and response voltage, and
Lightning current after reduction and response voltage are transmitted to impedance calculation device 6.In the present embodiment, electrical to optical converter 51 and opto-electronic conversion
The number of channels of device 53 is multiple, to meet lightning current with being measured while multigroup response voltage.
Lightning current, response photovoltaic conversion can be optical signal by the electro-optic device of addition, and the transmission of optical signal is by electromagnetism
The influence of field is smaller, therefore avoids lightning current with responding voltage in transmitting procedure by electromagnetic interference, so that, there is provided survey
Measure the degree of accuracy of data.Meanwhile test equipment can be also protected not damaged because electric current excessive in ray process is drawn.
In order to further ensure that measurement data is not disturbed by high-intensity magnetic field, in the present embodiment, the test of Transient grounding resistance
System also includes a sensing chamber 7, is used to arrange optical-electrical converter 53 and impedance calculation device 6 in sensing chamber 7.
Certainly, also the resistance measure of the drops such as earthing pole, friction reducer can be increased on earthing or grounding means 8 to be measured, so as to assess drop resistance measure
Resistance reducing effect under nature lightning.
Fig. 2 is the process for using figure of the test system of the application Transient grounding resistance, as shown in Fig. 2 this uses process bag
Include following steps：
Step 100, by thunder carrying-off device and drainage bar, lightning current is injected into earthing or grounding means to be measured.
Naturally the lightning current generated is incorporated into by ground using thunder carrying-off device 1, and treated lightning current injection by drainage bar 2
Survey earthing or grounding means 8.
Step 200, the lightning current of earthing or grounding means to be measured is flowed into using current measuring device, measurement.
In this example, the lightning current of earthing or grounding means 8 to be measured is flowed into using the measurement of the first current meter 31, and by measurement
The amplitude of lightning current reaches impedance calculation device 6.
Because the amplitude of lightning current is larger, in order to prevent impedance calculation device 6 from being damaged because drawing electric current excessive in ray process
It is bad, step 210 is also included before the lightning current of measurement is reached into impedance calculation device 6, the lightning current of measurement is decayed default
Multiple.
Step 300, using voltage measuring apparatus, the response voltage of the earthing or grounding means to be measured under lightning current effect is measured.
In this example, the response voltage of earthing or grounding means 8 to be measured is flowed into using the measurement of first voltage meter 41, and will measurement
The amplitude of response voltage reach impedance calculation device 6.
Because the amplitude for responding voltage is larger, in order to prevent impedance calculation device 6 because drawing response electricity excessive in ray process
Press and damage, step 310 is also included before the response voltage of measurement is reached into impedance calculation device 6, by the response electricity of measurement
The default multiple of pressure decay.
Step 400, the lightning current of measurement and response voltage are reached into impedance calculation device.
In order to avoid lightning current and response voltage in transmitting procedure by electromagnetic interference, in the application, by measurement
Lightning current passes with response voltage to be switched to be transmitted again for electrical signal, and Fig. 3 is that the application transmits lightning current with responding voltage
Flow chart, as shown in figure 3, transmission lightning current specifically includes with responding the process that voltage passes,
Step 401, lightning current is separately converted to corresponding electric current optical signal and voltage optical signal with response voltage.
Lightning current, response voltage are separately converted into corresponding electric current optical signal and voltage light using electrical to optical converter 51 to believe
Number.
Step 402, electric current optical signal and voltage optical signal are transmitted by optical fiber 52.
The transmitting procedure of optical signal influenceed by electromagnetic field it is smaller, therefore avoid lightning current with response voltage be transmitted across
By electromagnetic interference in journey, so that, there is provided the degree of accuracy of measurement data.
Step 403, electric current optical signal is reduced to corresponding lightning current and response voltage with voltage optical signal.
Electric current optical signal will be reduced to by corresponding lightning current and response electricity with voltage optical signal using optical-electrical converter 53
Pressure, and lightning current, response voltage are sent to impedance calculation device 6.
Step 500, impedance calculation device calculates Transient grounding resistance according to lightning current and response voltage.
In this example, the process for calculating Transient grounding resistance specifically includes,
According to the lightning current of reception, the current amplitude I that the first current meter measures during jth time electric discharge is determinedj；
According to the response voltage of reception, the voltage magnitude that k-th of first voltage meter measures during jth time electric discharge is determined
Vkj；
Calculate V1jAnd V2jVoltage deviation, and judge whether it exceedes default relative standard deviation values, if not less than default
Relative standard deviation values, then illustrate that the installation position of ground stud is appropriate, its magnitude of voltage measured can be used for calculating Transient grounding resistance
Zkj；If exceeding default relative standard deviation values, illustrate that k values are too small, ground stud need to be relocated.Wherein, people in the art
Member can select the suitable numerical values recited of relative standard deviation values according to being actually needed.
Utilize formula Zkj=Vkj/Ij, calculate Transient grounding resistance Zkj；
According to the Zk of calculatingj, obtain the Transient grounding resistance Z of earthing or grounding means to be measured.
This calculating process will be illustrated by an example below.
Test system includes two first voltage meters and measured, k=1, and 2.In measurement process, thunder and lightning has 1 main discharge
With 2 counterattacks, i.e. j=3, corresponding 3 primary current value is respectively I1=40.65kA, I2=17.11kA, I3=6.54kA；First
Individual first voltage meter, i.e. during k=1, corresponding 3 magnitudes of voltage are respectively V11=160.6kV, V12=72.03kV, V13
=26.54kV；Second first voltage meter, i.e. during k=2, corresponding 3 magnitudes of voltage are respectively V21=169.23kV,
V22=74.73KV, V23=29.88Kv.
In this example, relative standard deviation values are set as 5%.It is computed, V1jAnd V2jVoltage deviation be less than 5%, therefore, V1j
And V2jIt is used equally for calculating Transient grounding resistance Zkj。
In this example, with V2jExemplified by explanation calculate Transient grounding resistance ZkjProcess, i.e. k=2 when, utilize formula Zkj
=Vkj/Ij, calculate Transient grounding resistance Zkj, it is respectively：Z21=V21/I1=4.16, Z22=V22/I2=4.37, Z23=
V23/I3=4.57.
According to Z2j, Transient grounding resistance value Z is obtained, it is specifically included, and can use Z2jIn any one numerical value connect as impact
Ground impedance value Z, such as Z=Z22=4.37, it also can use Z2jAverage value as Transient grounding resistance value Z, Z=4.36.
The embodiment of the present application provides a kind of test system of Transient grounding resistance, based on artificially triggered lightning technology, by lightning current
Test electric current as detection Transient grounding resistance.With the dash current using impulse current generator generation as test electric current
Compare, the lightning current that artificially triggered lightning obtains can reach hundred kA thunder and lightning waveform, can make the sufficient spark discharge of soil；Meanwhile people
Work draws the characteristic that the lightning current that thunder obtains has Return stroke, and earthing or grounding means to be measured can be made to reflect real lightning protection characteristic.According to
Earthing or grounding means to be measured shows real lightning protection characteristic, can specific aim earthing or grounding means to be measured is designed or transformed.
Claims (4)
1. a kind of test system of Transient grounding resistance, it is characterised in that the system includes：
The thunder carrying-off device (1) that is sequentially connected and drainage bar (2), the one of the thunder carrying-off device (1) is not connected with the drainage bar (2)
Hold the center for connecting earthing or grounding means to be measured；
Current measuring device (3), the current measuring device (3) include the first current meter (31), first galvanometer
Measuring device (31) is formulated into, and the lightning current of earthing or grounding means to be measured is injected in measurement, and the lightning current of measurement is reached into impedance computation dress
Put (6)；
At least one voltage measuring apparatus (4), each voltage measuring apparatus (4) include first voltage meter (41), the
One potentiometer measuring device (41) is formulated into, and in the predetermined position away from earthing or grounding means center to be measured, is measured earthing or grounding means to be measured and is existed
Response voltage caused by lightning current effect is lower, and the response voltage of measurement is reached into impedance calculation device (6)；
The impedance calculation device (6) is used to, according to the lightning current and response voltage, calculate Transient grounding resistance.
2. the system as claimed in claim 1, it is characterised in that the system also includes electrical to optical converter (51) and opto-electronic conversion
Device (53), the input of the electrical to optical converter (51) connect first current meter (31) and the first voltage respectively
Meter (41), the output end of the electrical to optical converter (51) connect the input of the optical-electrical converter (53) by optical fiber (52)
End, the electrical to optical converter (51) are used to the lightning current being respectively converted into corresponding electric current optical signal and electricity with response voltage
Press polish signal；
The output end of the optical-electrical converter (53) connects the impedance calculation device (6), and the optical-electrical converter (53) is used for
The electric current optical signal and voltage optical signal are reduced to its corresponding lightning current and response voltage.
3. the system as claimed in claim 1, it is characterised in that the current measuring device (3) also includes the second current attenuation
Device (32), second current attenuator (32), which is used to decay the lightning current of first current meter (31) measurement, presets
Multiple.
4. the system as claimed in claim 1, it is characterised in that the voltage measuring apparatus (4) also includes second voltage and decayed
Device (42), the second voltage attenuator (42) are used for the response voltage attenuation of the first voltage meter (41) detection is pre-
If multiple.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247189A (en) * | 2017-07-26 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | The test system and its method of a kind of Transient grounding resistance |
| CN111965430A (en) * | 2020-08-26 | 2020-11-20 | 扬州大学 | Impedance measurement method and device capable of realizing power supply of low-voltage lithium battery pack |
| CN112485303A (en) * | 2020-12-08 | 2021-03-12 | 国网四川省电力公司电力科学研究院 | Method and system for analyzing characteristic parameters of soil multi-impact discharge |
-
2017
- 2017-07-26 CN CN201720913495.6U patent/CN207007943U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247189A (en) * | 2017-07-26 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | The test system and its method of a kind of Transient grounding resistance |
| CN107247189B (en) * | 2017-07-26 | 2024-02-06 | 云南电网有限责任公司电力科学研究院 | Impact grounding impedance testing system and method thereof |
| CN111965430A (en) * | 2020-08-26 | 2020-11-20 | 扬州大学 | Impedance measurement method and device capable of realizing power supply of low-voltage lithium battery pack |
| CN111965430B (en) * | 2020-08-26 | 2023-03-17 | 扬州大学 | Impedance measurement method and device capable of realizing power supply of low-voltage lithium battery pack |
| CN112485303A (en) * | 2020-12-08 | 2021-03-12 | 国网四川省电力公司电力科学研究院 | Method and system for analyzing characteristic parameters of soil multi-impact discharge |
| CN112485303B (en) * | 2020-12-08 | 2023-08-08 | 国网四川省电力公司电力科学研究院 | Method and system for analyzing characteristic parameters of multiple impact discharge of soil |
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