CN107515364A - A kind of radio interference time domain measurement device and method based on conductor corona electric discharge - Google Patents
A kind of radio interference time domain measurement device and method based on conductor corona electric discharge Download PDFInfo
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- CN107515364A CN107515364A CN201710732208.6A CN201710732208A CN107515364A CN 107515364 A CN107515364 A CN 107515364A CN 201710732208 A CN201710732208 A CN 201710732208A CN 107515364 A CN107515364 A CN 107515364A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention discloses a kind of radio interference measuring device and method based on conductor corona electric discharge.The device includes：Time domain measurement antenna, measurement resistance, voltage measurement element, voltage acquisition element and computer, time domain measurement antenna is connected with measurement resistance, time domain measurement antenna is grounded with measurement resistance, voltage measurement element and measurement resistor coupled in parallel, the input of voltage acquisition element is connected with voltage measurement element, output end is connected with computer, and time domain measurement antenna is used for the time-domain signal for receiving the radio interference electric field as caused by discharging conductor corona；Resistance is measured to be used to carry out partial pressure to the time domain measurement antenna；Voltage measurement element is used for the time domain voltage for measuring the measurement resistance both ends；Computer is used to handle time domain voltage, obtains the time domain specification of the radio interference.Device and method provided by the invention, realize to the real-time collection of space field intensity signal and record, can more fully obtain the characteristic of corona discharge radio interference.
Description
Technical field
The present invention relates to radio art, is surveyed more particularly to a kind of radio interference time domain based on conductor corona electric discharge
Measure device and method.
Background technology
With expanding economy, long range, Large Copacity, low-loss transmission system are established as China's power network development
It is inevitable.Extra-high voltage AC and DC power transmission network, can also be significantly in addition to it can meet the needs of extensive electric energy and long-distance sand transport
Security, reliability, flexibility and the economy of power network itself are improved, there is significant Social benefit and economic benefit.However,
The working voltage higher grade of power network, and corresponding technical requirements are also higher.
When exceeding bloom field strength when conductive line surfaces field strength is larger, corona discharge phenomenon can occur for wire, caused by electric discharge
Corona current can produce radio interference, need to limit the radio interference level around circuit in Transmission Line Design
System.At present, it is general according to CISPR (CISPR-International Special both at home and abroad
Committee on Radio Interference) or ANSI (ANSI-American National
Standards Institute) standard measure the radio interference of transmission line of electricity, only carried out in 0.5MHz or 1.0MHz single
Frequency measures, or is influenceed to eliminate standing wave, chooses some typical frequencies and carries out multifrequency point measurement.However, this measurement side
Method has its shortcoming：(1) measurement result lost substantial amounts of temporal signatures information, such as, the waveform parameter of radio interference pulse
Deng；(2) this method belongs to frequency domain measuring method, it is more difficult to rejects influence of the ambient noise to measurement result；(3) radio interference frequency
What spectral property reflected is the comprehensive effect of radio interference in a period of time, with observation station position, wire type, wire arrangements shape
The factors such as formula, the earth parameter are closely related, and the radio interference at unmeasured frequency can only be extrapolated to obtain by empirical equation, and
Empirical equation is only applicable to limited frequency range and spatial dimension, and error is larger；(4) if wanting to obtain the radio of multiple frequencies
The characteristic of interference, it is necessary to using frequency sweep method, the testing time is longer.It can be seen that the frequency domain test method of existing radio interference
Limitation is larger.
The content of the invention
It is an object of the invention to provide it is a kind of based on conductor corona electric discharge radio interference time domain measurement device and method,
It can realize to the real-time collection of space field intensity signal and record, radio interference can be obtained and changed with time rule, energy
Enough characteristics for more fully obtaining corona discharge radio interference.
To achieve the above object, the invention provides following scheme：
A kind of radio interference time domain measurement device based on conductor corona electric discharge, described device include：
Time domain measurement antenna, the time domain measurement antenna are used to receive the radio interference electricity as caused by discharging conductor corona
The time-domain signal of field；
Resistance is measured, the measurement resistance is used to carry out partial pressure to the time domain measurement antenna；
Voltage measurement element, the voltage measurement element are used for the time domain voltage for measuring the measurement resistance both ends；
Voltage acquisition element, the voltage acquisition element are used for the time domain electricity for gathering the voltage measurement element measurement
Pressure, and the time domain voltage is transmitted to computer；
Computer, the computer are used to analyze and process the time domain voltage, obtain the radio interference
Time domain specification；
One end of the time domain measurement antenna with it is described measurement resistance one end be connected, the time domain measurement antenna it is another
The other end with the measurement resistance is held to be grounded, the voltage measurement element and the measurement resistor coupled in parallel, the voltage are adopted
The input of collection element is connected with the voltage measurement element, the output end of the voltage acquisition element and the computer phase
Even.
Optionally, described device also includes ground connection electroplax, and the time domain measurement antenna is fixed on institute with the measurement resistance
State on ground connection electroplax.
Optionally, the time domain measurement antenna is columnar antenna.
Optionally, the length of the time domain measurement antenna is 40cm.
Optionally, the resistance of the measurement resistance is 10k Ω.
Optionally, the voltage measurement element is voltage probe.
Optionally, the acquisition elements are high-speed data acquisition card.
Present invention also offers a kind of radio interference ime-domain measuring method based on conductor corona electric discharge, methods described should
For the radio interference time domain measurement device provided by the invention based on conductor corona electric discharge, described device includes：
Time domain measurement antenna, the time domain measurement antenna are used to receive the radio interference electricity as caused by discharging conductor corona
The time-domain signal of field；
Resistance is measured, the measurement resistance is used to carry out partial pressure to the time domain measurement antenna；
Voltage measurement element, the voltage measurement element are used for the time domain voltage for measuring the measurement resistance both ends；
Voltage acquisition element, the voltage acquisition element are used for the time domain electricity for gathering the voltage measurement element measurement
Pressure, and the time domain voltage is transmitted to computer；
Computer, the computer are used to analyze and process the time domain voltage, obtain the radio interference
Time domain specification；
One end of the time domain measurement antenna with it is described measurement resistance one end be connected, the time domain measurement antenna it is another
One end and the other end of the measurement resistance are grounded, the voltage measurement element and the measurement resistor coupled in parallel, the voltage
One end of acquisition elements is connected with the voltage measurement element, the other end of the voltage acquisition element and the computer phase
Connection；
Methods described includes：
The time domain voltage that the voltage acquisition element collects is obtained, obtains the time domain voltage signal；
Fourier transformation is carried out to the time domain voltage signal, obtains the frequency domain form of the time domain voltage signal；
According to the RC series circuits and the time domain voltage signal of the measurement resistance and time-domain antenna composition
Frequency domain form calculates the frequency domain form for the voltage signal that the time-domain antenna receives；
The frequency domain form of the voltage signal received according to the time-domain antenna and the time domain measurement antenna it is effective
The frequency domain form of radio interference electric field is highly calculated；
Fourier inversion is carried out to the frequency domain form of the radio interference electric field, obtains the radio-interference signals
The time domain waveform of electric field.
According to specific embodiment provided by the invention, the invention discloses following technique effect：It is provided by the invention to be based on
The radio interference time domain measurement device and method of conductor corona electric discharge, there is provided time domain measurement antenna, measurement resistance, voltage to survey
Element, voltage acquisition element, computer are measured, the radio interference as caused by discharging conductor corona is received using time domain measurement antenna
The time-domain signal of electric field, measurement resistance are connected to after time-domain antenna, and partial pressure is formed with time domain measurement antenna by measuring resistance
Circuit, voltage measurement element measurement record measurement resistance time domain voltage signal, computer voltage measurement element is measured when
The anti-time domain field strength for pushing away measurement point of domain voltage signal.Realize to the real-time collection of space field intensity signal and record, Neng Gouyou
Effect ground measures to conductor corona electric discharge radio interference electric field time domain specification, further, since background noise is to time domain
The measurement of signal influences very little, and this causes the radio interference characteristic of the invention measured more accurately and reliably.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation for the radio interference time domain measurement device that the embodiment of the present invention is discharged based on conductor corona
Figure；
Fig. 2 is the connection in kind for the radio interference time domain measurement device that the embodiment of the present invention is discharged based on conductor corona
Figure；
Fig. 3 is the circuit model for the radio interference time domain measurement device that the embodiment of the present invention is discharged based on conductor corona
Figure；
Fig. 4 is the radio interference ime-domain measuring method schematic flow sheet that the embodiment of the present invention is discharged based on conductor corona；
Fig. 5 is corona current of the embodiment of the present invention and measurement voltage time-domain pulse train figure；
Fig. 6 is corona current pulse temporal oscillogram of the embodiment of the present invention；
Fig. 7 is theoretical waveform of the embodiment of the present invention and measuring system experimental waveform comparison diagram；
Fig. 8 is the time domain beamformer for the radio interference electric field that the embodiment of the present invention is discharged based on conductor corona.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The radio interference time domain measurement device to be discharged it is an object of the invention to provide a kind of nothing based on conductor corona and side
It method, can realize to the real-time collection of space field intensity signal and record, radio interference can be obtained and changed with time rule,
And then it can more fully obtain the characteristic of corona discharge radio interference.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
Fig. 1 is the structural representation for the radio interference time domain measurement device that the embodiment of the present invention is discharged based on conductor corona
Figure, as shown in figure 1, measurement apparatus provided by the invention includes：Time domain measurement antenna 101, measurement resistance 103, voltage measurement member
Part 104, voltage acquisition element 105 and computer 106, time domain measurement antenna 101 are used to receive as caused by discharging conductor corona
The time-domain signal of radio interference electric field；Resistance 103 is measured to be used to carry out partial pressure to the time domain measurement antenna；Voltage measurement member
Part 104 is used for the time domain voltage for measuring the measurement resistance both ends；Voltage acquisition element 105 is used to gather the voltage measurement member
The time domain voltage of part measurement, and the time domain voltage is transmitted to computer 106；Computer 106 is used for the time domain
Voltage is analyzed and processed, and obtains the time domain specification of the radio interference；
The time domain measurement antenna 101 with it is described measurement resistance 103 be connected, the time domain measurement antenna 101 with it is described
Measurement resistance 103 is grounded, and the voltage measurement element 104 is in parallel with the measurement resistance 103, the voltage acquisition element
105 inputs (collection terminal) are connected with the voltage measurement element 104, and output end is connected with the computer 106.
Described device also includes ground connection electroplax 102, and the time domain measurement antenna 101 is fixed on the measurement resistance 103
On the ground connection electroplax 102.
Preferably, the time domain measurement antenna 101 is columnar antenna.
Preferably, the length of the time domain measurement antenna 101 is 40cm.
Preferably, the resistance of the measurement resistance 103 is 10k Ω.
Preferably, the voltage measurement element 104 can be voltage probe；The acquisition elements 105 can be at a high speed
Data collecting card.
The connection in kind for the radio interference time domain measurement device that the embodiment of the present invention is discharged based on conductor corona is such as Fig. 2 institutes
Show.
As another embodiment of the present invention, the radio interference time domain measurement device based on conductor corona electric discharge is by time domain
Antenna, grounding plate, measurement resistance, voltage probe and the most of composition of high-speed data acquisition card five are measured, mainly for
Radio interference electric field signal caused by corona discharge carries out time domain measurement, and the time domain measurement antenna is connected with measurement resistance
Connect, and both place and are fixed on grounding plate and by grounding plate effective grounding, the main work(of time domain measurement antenna
Radio interference field strength signal caused by being reception corona discharge, is translated into voltage signal, enters for subsequent acquisition system
Row collection and storage；The effect of grounding plate is that good ground connection image reference plane is provided for time-domain antenna；Measure resistance
It is connected to after time-domain antenna, the bleeder circuit formed by measuring resistance with antenna, the time domain electricity of measurement record measurement resistance
Pressure signal counter can push away the time domain field strength of measurement point.High bandwidth voltage probe is connected in parallel on measurement resistance both ends, is surveyed for gathering
Resistance both ends time domain voltage is measured, high-speed data acquisition card and computer is followed by, the time domain voltage signal collected is shown simultaneously
Storage.
Most of traditional radio interference measurement antenna uses loop aerial, but loop aerial can only measure
The magnetic-field component of radio interference.Time domain measurement antenna is using columnar antenna in the present invention, for measuring radio interference
Electric field component.Because the band limits of corona current caused by corona discharge is 0-30MHz, the columnar antenna needs in design
Cover the highest frequency of corona current, in order to prevent occurring transmission line effect in measurement process, columnar antenna should be caused
Length should meet β h much smaller than the wavelength for receiving electric field signal<<When 1, (β=2 π/λ is referred to as wave number, and λ is reception signal
Wavelength, h are the length of antenna), h can be obtained<1m, due to the presence of grounding plate, one can be produced in actual measurement process
Image antenna, therefore only need to consider that single armed length meets in the design process：L=h/2<50cm, the present invention are imitated using HFSS
It is true when columnar antenna length is 40cm, 35cm, 30cm, 25cm, 20cm, the gain in antenna XZ directions.Simulation result such as table 1
Shown, when antenna length is 40cm, gain of the antenna on XZ directions is maximum, therefore the antenna length selected is 40cm.
The different length antenna gain of table 1
After antenna length is selected, it is contemplated that influence of the radius change of antenna to effective antenna length is little, therefore, this
Invention makes time domain columnar antenna, length 40cm, radius 3mm using hard-drawn copper stranded conductor, and mechanical strength meets that Test Cycle will
Ask.
The measurement resistant series of the present invention are connected on after time domain measurement antenna, when time domain measurement antenna induction space electric field produces
During raw voltage signal, it can form loop by measuring resistance and grounding plate and produce electric current, in order to take into full account that time domain is surveyed
Measure antenna and measure the match condition between resistance so that the effective bandwidth in whole loop meets corona current 0- as far as possible
30MHz bandwidth improves the frequency bandwidth characteristicses of measuring system, improves standing wave, it is necessary to the resistance for measuring resistance is in optimized selection
Compare bandwidth.
Because measurement resistance is for the form output by antenna induction voltage by partial pressure, and measurement resistance and antenna
Equivalent capacity constitutes RC series circuits, specific as shown in Figure 3.In this circuit model, time-domain antenna can under the conditions of electricity is small
To be equivalent to an electric capacity, this electric capacity forms RC series circuits with measurement resistance, and the electric capacity calculation formula of time-domain antenna is as the following formula
Calculated：
Wherein, β=2 π/λ, k=2ln (2h/a), a are antenna radius, and h is antenna length；
And the relation between external electrical field and antenna induction voltage is：
Wherein,For external electrical field；For antenna induction voltage, heFor antenna height equivlent, can be expressed as：
In order to guarantee accurately to measure corona current and induced voltage, measuring the selection of resistance should expire
Foot：(1) ensure that measurement voltage does not occur that waveform is overlapping, the time constant of measuring circuit should be less than or equal to corona current pulse
Time constant；(2) measurement resistance should make it that standing-wave ratio of the time domain measurement antenna in concern frequency range should be at least below 2.Base
In condition (1), in the statistics for understanding corona current pulse again, the duration of corona current individual pulse is 250ns, is
Ensure RCa≤ 250ns, the scope for having primarily determined that measurement resistance is R≤10.7k Ω, and is emulated and found by HFSS, with electricity
The increase of resistance, standing-wave ratio is less and less in the value of low frequency component, and the frequency spectrum of DC power transmission line corona current is analyzed
Afterwards, the corona current amplitude after being more than 10MHz to frequency that is easy to get can decay 10-20dB, i.e. 10MHz-30MHz frequency domain components very
It is small, time domain measurement result is influenceed smaller.Therefore, by the way that under more different measurement resistance values, the bandwidth of effective standing-wave ratio exists
Accounting within 10MHz can intuitively reflect that time-domain antenna reflects different resistances with measuring the match condition of resistance, table 2
Lower antenna and the match condition of measurement impedance.With the increase of resistance value, effective bandwidth accounting of the standing-wave ratio below 2.0 is increasingly
Greatly, therefore, 10k Ω resistance value should be selected as the measurement resistance value of measuring system.
The standing-wave ratio of the different measurement resistance of table 2
Due to the presence of antenna equivalent capacity, the measurement apparatus can not measure DC component, but remove DC component with
Outer low frequency component can effectively be reduced by measuring circuit, and when it is 10k Ω to measure resistance value, corresponding standing-wave ratio is 2.0
Frequency values in 1kHz or so, therefore to a width of 1kHz-30MHz of band of measurement apparatus that should be under standing-wave ratio, meet radio
The bandwidth requirement of interferometry.
Time domain measurement antenna and measurement resistance after design, standing-wave ratio is small, and measurement sensitivity is high, can be effectively
The time-domain signal of radio interference is measured.The voltage signal at measurement resistance both ends is acquired using voltage probe, it
It is transferred to afterwards on the passage of high-speed data acquisition card, and the final ripple that will be measured using the software kit of capture card on computers
Shape shows, in order to meet sampling thheorem, the bandwidth of voltage probe and data collecting card needs to be more than 60MHz, the present invention
Voltage probe band a width of DC-250MHz of selection, measurable rise time 1.4ns, input resistance are 10M Ω, input capacitance
Value is about 13pF, and maximum input voltage is up to 600V.The data collecting card that the present invention selects uses USB2.0 interfaces, in single channel
In the case of highest sample frequency be 500MHz/S, the highest sample frequency of single passage is 200MHz/ in the case of twin-channel
S, the waveform of measurement voltage can be clearly recorded, meet the time domain measurement of radio interference caused by corona current.It is accurate to survey
After measuring measurement resistance both ends time domain voltage waveforms, the circuit model of measurement apparatus is utilized, it is possible to counter to release measurement point
The electric field time domain waveform at place.
Present invention also offers a kind of radio interference ime-domain measuring method based on conductor corona electric discharge, this method flow
Step is as shown in figure 4, it is mainly comprised the following steps：
Step 401：The time domain voltage that the voltage acquisition element collects is obtained, obtains the time domain voltage signal；
Step 402：Fourier transformation is carried out to the time domain voltage signal, obtains the frequency domain shape of the time domain voltage signal
Formula；
Step 403：The RC series circuits and time domain electricity formed according to the measurement resistance with the time-domain antenna
The frequency domain form of pressure signal calculates the frequency domain form for the voltage signal that the time-domain antenna receives；
Step 404：The frequency domain form of the voltage signal received according to the time-domain antenna and the time domain measurement day
The frequency domain form of radio interference electric field is calculated in the effective depth of line；
Step 405：Fourier inversion is carried out to the frequency domain form of the radio interference electric field, obtains the radio
The time domain waveform of interference signal electric field.
Above step is that computer obtains measuring resistance both ends time domain voltage waveforms and measurement apparatus according to measurement
Circuit model, the process of the anti-electric field time domain waveform for releasing measurement point.
When Fig. 5 is that corona discharge occurs for wire, caused time domain impulse and logical on the wire that is gathered by current probe
The time domain impulse crossed on the voltage probe obtained measured by this measuring system.Radio interference can be seen that by Fig. 5 contrast
Pulse and corona current pulse have one-to-one relationship in time domain, illustrate that this measuring system is measuring on the whole effective
Property.Fig. 6 is a corona current pulse temporal oscillogram, can be according to transmission line theory meter by Fig. 6 corona current pulse
The electric current time domain distribution on electrical discharge wire is calculated, so as to establish by the propagation model of electric current to electric field, and it is possible thereby to is calculated
The electric field waveform of measurement point, and then the time domain ripple at measurement resistance both ends can be derived by the circuit model of measuring system
Shape, Fig. 7 illustrate the voltage time domain ripple that the voltage time domain waveform being derived from by corona current is drawn with measuring system measurement
The comparison diagram of shape.The time domain waveform that radio interference electric field is tried to achieve using the method shown in Fig. 4 is given shown in Fig. 8.By by
The contrast of voltage time domain waveform that corona current is derived from and the voltage time domain waveform drawn according to measuring system measurement can be with
Find out, the measuring system provided using the present invention, effectively can discharge conductor corona radio interference electric field time domain specification
Measure.
Radio interference time domain measurement device and method provided by the invention based on conductor corona electric discharge, there is provided time domain
Antenna, measurement resistance, voltage measurement element, voltage acquisition element, computer are measured, is received using time domain measurement antenna by wire
The time-domain signal of radio interference electric field caused by corona discharge, measurement resistance is connected to after time-domain antenna, by measuring electricity
Resistance forms bleeder circuit with time domain measurement antenna, the time domain voltage signal of voltage measurement element measurement record measurement resistance, calculates
The anti-time domain field strength for pushing away measurement point of time domain voltage signal that machine is measured voltage measurement element.Realize to space field intensity signal
Real-time collection and record, can effectively to conductor corona electric discharge radio interference electric field time domain specification measure, in addition,
Because measurement of the background noise on time-domain signal influences very little so that the radio interference characteristic that the present invention measures is more accurate
It is really reliable.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.In summary, this specification content is not
It is interpreted as limitation of the present invention.
Claims (8)
1. a kind of radio interference time domain measurement device based on conductor corona electric discharge, it is characterised in that described device includes：
Time domain measurement antenna, the time domain measurement antenna are used to receive the radio interference electric field as caused by discharging conductor corona
Time-domain signal；
Resistance is measured, the measurement resistance is used to carry out partial pressure to the time domain measurement antenna；
Voltage measurement element, the voltage measurement element are used for the time domain voltage for measuring the measurement resistance both ends；
Voltage acquisition element, the voltage acquisition element are used for the time domain voltage for gathering the voltage measurement element measurement,
And the time domain voltage is transmitted to computer；
Computer, the computer are used to analyze and process the time domain voltage, obtain the time domain of the radio interference
Characteristic；
One end of the time domain measurement antenna with it is described measurement resistance one end be connected, the other end of the time domain measurement antenna with
The other end of the measurement resistance is grounded, the voltage measurement element and the measurement resistor coupled in parallel, the voltage acquisition member
The input of part is connected with the voltage measurement element, and the output end of the voltage acquisition element is connected with the computer.
2. the radio interference time domain measurement device according to claim 1 based on conductor corona electric discharge, it is characterised in that
Described device also includes ground connection electroplax, and the time domain measurement antenna is fixed on the ground connection electroplax with the measurement resistance.
3. the radio interference time domain measurement device according to claim 2 based on conductor corona electric discharge, it is characterised in that
The time domain measurement antenna is columnar antenna.
4. the radio interference time domain measurement device according to claim 3 based on conductor corona electric discharge, it is characterised in that
The length of the time domain measurement antenna is 40cm.
5. the radio interference time domain measurement device according to claim 2 based on conductor corona electric discharge, it is characterised in that
The resistance of the measurement resistance is 10k Ω.
6. the radio interference time domain measurement device according to claim 1 based on conductor corona electric discharge, it is characterised in that
The voltage measurement element is voltage probe.
7. the radio interference time domain measurement device according to claim 1 based on conductor corona electric discharge, it is characterised in that
The acquisition elements are high-speed data acquisition card.
8. a kind of radio interference ime-domain measuring method based on conductor corona electric discharge, it is characterised in that methods described is applied to
A kind of radio interference time domain measurement device based on conductor corona electric discharge, described device include：
Time domain measurement antenna, the time domain measurement antenna are used to receive the radio interference electric field as caused by discharging conductor corona
Time-domain signal；
Resistance is measured, the measurement resistance is used to carry out partial pressure to the time domain measurement antenna；
Voltage measurement element, the voltage measurement element are used for the time domain voltage for measuring the measurement resistance both ends；
Voltage acquisition element, the voltage acquisition element are used for the time domain voltage for gathering the voltage measurement element measurement,
And the time domain voltage is transmitted to computer；
Computer, the computer are used to analyze and process the time domain voltage, obtain the time domain of the radio interference
Characteristic；
One end of the time domain measurement antenna with it is described measurement resistance one end be connected, the other end of the time domain measurement antenna with
The other end of the measurement resistance is grounded, the voltage measurement element and the measurement resistor coupled in parallel, the voltage acquisition member
The input of part is connected with the voltage measurement element, and the output end of the voltage acquisition element is connected with the computer；
Methods described includes：
The time domain voltage that the voltage acquisition element collects is obtained, obtains the time domain voltage signal；
Fourier transformation is carried out to the time domain voltage signal, obtains the frequency domain form of the time domain voltage signal；
The RC series circuits and the frequency domain of the time domain voltage signal formed according to the measurement resistance with the time-domain antenna
The frequency domain form for the voltage signal that time-domain antenna described in form calculus receives；
The effective depth of the frequency domain form of the voltage signal received according to the time-domain antenna and the time domain measurement antenna
The frequency domain form of radio interference electric field is calculated；
Fourier inversion is carried out to the frequency domain form of the radio interference electric field, obtains the radio-interference signals electric field
Time domain waveform.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188220A (en) * | 2018-08-31 | 2019-01-11 | 中国电力科学研究院有限公司 | A kind of method and system of time domain index that assessing transmission line of electricity corona current signal |
| CN113687193A (en) * | 2021-07-21 | 2021-11-23 | 贵州电网有限责任公司 | Radio interference time domain rule statistical method, device, equipment and storage medium |
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Application publication date: 20171226 |