CN107462852A - A kind of scaling method of high frequency partial discharge examination instrument parameter - Google Patents
A kind of scaling method of high frequency partial discharge examination instrument parameter Download PDFInfo
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Abstract
The present invention relates to Partial Discharge Detecting Technology field, and in particular to a kind of scaling method of high frequency partial discharge examination instrument parameter, device used in the present invention include AWG, noninductive resistance, high speed digital oscilloscope, injection electric capacity, interference resistance；High frequency partial discharge detector includes tested high frequency sensors；The present invention is demarcated by detecting transfer impedance, the detection frequency of high frequency partial discharge detector, the sensitivity of high frequency partial discharge detector, the linearity of high frequency partial discharge detector, the high frequency partial discharge detector anti-interference of high frequency partial discharge detector to high frequency partial discharge detector, its testing result is expressed as unified dimension, reflects the physical essence of measurand；And the structure of tested high frequency sensors is considered, fully demonstrate the actually detected ability of its engineering；The present invention uses high-frequency coupling frock, and its shield effectiveness is high, and test result is stable, small by external environmental interference.
Description
Technical field
The present invention relates to Partial Discharge Detecting Technology field, and in particular to a kind of mark of high frequency partial discharge examination instrument parameter
Determine method.
Background technology
With the continuous improvement developed rapidly with living standards of the people of national economy, the social demand to electric energy is increasingly
Greatly, net capacity constantly expands, and voltage class steps up, and the stability and reliability to power system propose higher want
Ask.Strengthen the research of power transmission and transforming equipment on-line monitoring, fault diagnosis and state estimation technology, for improving utilization rate of equipment and installations and fortune
Row reliability, ensure that power grid security economical operation is significant.Operation of Electric Systems maintenance mode is by planned maintenance pattern
Turn into inexorable trend to repair based on condition of component transition.Shelf depreciation is the main reason for causing insulation degradation, and insulation degradation
Important sign and the form of expression.
Pulse current method is that research is earliest, and the Main Means of monitoring power equipment shelf depreciation at present, and it is to pass through
Impedance or current sensor are detected, detection Transformer Bushing Tap ground wire, earthing of casing line, neutral ground line, iron core connect
The pulse current caused by shelf depreciation in ground wire and winding, obtain Apparent discharge magnitude.And use the high-frequency method country not yet
Relevant criterion is formulated, high frequency partial discharge detector performance is very different, does not seek unity of standard and it is demarcated, this shadow significantly
The validity and reliability of power equipment Partial Discharge Detection result has been rung, hidden danger will have been brought to the safe operation of power equipment.
The content of the invention
In order to solve the above problems, the invention provides a kind of scaling method of high frequency partial discharge examination instrument parameter, tool
Body technique scheme is as follows：
A kind of scaling method of high frequency partial discharge examination instrument parameter, device used in this method include random waveform
Device, noninductive resistance, high speed digital oscilloscope, injection electric capacity, interference resistance；High frequency partial discharge detector includes tested height and kept pouring in
Sensor；
This method by detect the transfer impedance of high frequency partial discharge detector, the detection frequency of high frequency partial discharge detector,
The sensitivity of high frequency partial discharge detector, the linearity of high frequency partial discharge detector, high frequency partial discharge detector are anti-dry
Immunity is demarcated to high frequency partial discharge detector, and specific method is as follows：
（1）Detect the transfer impedance of the tested high frequency sensors of high frequency partial discharge detector：
AWG is connected with noninductive resistance, the tested high frequency sensors of noninductive resistance and high frequency partial discharge detector
Connection, the tested high frequency sensors of high frequency partial discharge detector are connected with AWG, so form test loop；
The adjustable voltage signal of AWG output frequencyU s , corresponding frequencies, peak-to-peak value are produced in test loop
Between 10mA~30mA sinusoidal current signal；Voltage signal is adjusted in the range of 3MHz~30MHzU s Frequencyf, with a high speed
Digital oscilloscope is measured in voltage signal simultaneouslyU s Different frequencyfThe output voltage of tested high frequency sensors downV 2 (f)It is and noninductive
ResistanceR 0 The voltage at both endsV 1 (f), by formula（1）Try to achieve respective frequenciesfThe transfer impedance value of lower high frequency partial discharge detector；
；（1）
In formula：Z(f)It is in input voltage signalU s FrequencyfThe tested high frequency sensors of lower high frequency partial discharge detector
Transfer impedance value；R 0 It is the resistance of noninductive resistance；V 2 (f)- in input voltage signalU s FrequencyfLower high frequency partial discharge examination
The output voltage of the tested high frequency sensors of instrument；V 1 (f)- in input voltage signalU s FrequencyfLower noninductive resistanceR 0 Both ends
Output voltage；
（2）Detect the detection frequency of high frequency partial discharge detector：
AWG is connected with noninductive resistance, and noninductive resistance is connected with tested high frequency sensors, is detected high frequency sensors
It is connected with AWG, high frequency partial discharge detector is so formed and surveyed by tested high frequency sensors reception signal
Try loop；
The adjustable voltage signal of AWG output frequencyU s , pass throughR 0 Corresponding frequencies are produced in test loop
Sinusoidal current signal of the peak-to-peak value between 5mA~10mA；Voltage signal is adjusted in the range of 0.5MHz~50MHzU s Frequency,
The voltage for measuring noninductive resistance both ends by high speed digital oscilloscope is adjusting voltage signal so as to standby currentU s Frequency when
Keep current value constant；High frequency partial discharge detector shows that frequency corresponding during full-scale reading is to detect frequency；
（3）Detect the sensitivity of high frequency partial discharge detector：
AWG and injection capacitance connection, injection electric capacity are connected with tested high frequency sensors, are detected high frequency sensors
It is connected and is grounded with AWG, high frequency partial discharge detector is by being detected high frequency sensors reception signal, so
Form test loop；
AWG voltage pulse output signalU p , pulse current, mould are produced in test loop by injecting electric capacity
Intend the local discharge signal that Apparent discharge magnitude is Q, and the pulse current in test loop is detected by high frequency partial discharge detector；
And calculate pulse current and injection electric capacity that high frequency partial discharge detector detectsC 0 The caused pulse electricity in test loop
The signal to noise ratio of stream, signal to noise ratio is higher, shows that the sensitivity of high frequency partial discharge detector is higher；Wherein, C0For
Inject the value of electric capacity；
（4）Detect the linearity of high frequency partial discharge detector：
AWG and injection capacitance connection, injection electric capacity are connected with tested high frequency sensors, are detected high frequency sensors
It is connected and is grounded with AWG, high frequency partial discharge detector is by being detected high frequency sensors reception signal, so
Form test loop；
AWG voltage pulse output signalU p , pulse current, mould are produced in test loop by injecting electric capacity
Intend the local discharge signal of Apparent discharge magnitude, and the pulse current in test loop is detected by high frequency partial discharge detector；It is logical
Overregulate the pulse voltage signal of AWG outputU p The voltage amplitude of output, producing Apparent discharge magnitude is respectivelyQ 1
WithQ 2 Local discharge signal, high frequency partial discharge detector detects Apparent discharge magnitude and is respectively respectivelyQ 1 WithQ 2 Shelf depreciation
Signal, high frequency partial discharge detector is recorded respectively and shows detected signal amplitudeV 1 WithV 2 ；
If the signal amplitude that high frequency partial discharge detector is shown is linear graduation value, the line of high frequency partial discharge detector
Property degree error presses formula（2）Calculate：
；（2）
If the signal amplitude that high frequency partial discharge detector is shown is logarithmic scale value, the line of high frequency partial discharge detector
Property degree error presses formula（3）Calculate：
；（3）
Formula（2）And formula（3）In：ε is the linearity error of high frequency partial discharge detector；Q 2 、Q 1 To adjust random waveform
The pulse voltage signal of generator outputU p Apparent discharge magnitude caused by the voltage amplitude of output；Q 2 、Q 1 Value it is unequal；V 1 For
Inputting Apparent discharge magnitude isQ 1 When high frequency partial discharge detector show detected signal amplitude；V 2 For input apparent electric discharge
Measure and beQ 2 When high frequency partial discharge detector show detected signal amplitude；
（5）Detect high frequency partial discharge detector anti-interference：
Detection high frequency partial discharge detector anti-interference uses 2 AWGs；Wherein 1 AWG
For voltage pulse output signalU p , another AWG is used for output AC voltage signalU s , voltage pulse output
SignalU p AWG with injection capacitance connection, injection electric capacity be connected with tested high frequency sensors, tested height is kept pouring in
Sensor and voltage pulse output signalU p AWG connect and be grounded；
Output AC voltage signalU s Random waveform oscillograph be connected with interference resistance, disturb resistance and tested high frequency sensors
It is connected in series, is detected high frequency sensors and output AC voltage signalU s Random waveform oscillograph connection, high frequency partial electric discharge
Detector so forms test loop by tested high frequency sensors reception signal；
Pass through voltage pulse output signalU p AWG and injection electric capacity, in test loop produce apparent electric discharge
The pulse current for Q is measured, and the pulse current in test loop is detected by high frequency partial discharge detector；By exporting alternating current
Press signalU s Random waveform oscillograph through disturb resistance produce interference electric currentI s , while be applied in tested high frequency sensors, adjust
Whole ac voltage signalU s Output frequency to obtain the interference electric current of different frequencyI s , record Apparent discharge magnitude Q, interference electric currentI s Peak-to-peak value and the pulse current that detects of corresponding high frequency partial discharge detector with injection electric capacity in test loop
The signal to noise ratio of caused pulse current.
Further, ac voltage signal in the detection high frequency partial discharge detector anti-interferenceU s Frequency selection
50kHz、500kHz、1MHz、2MHz、5MHz、10MHz、15MHz、20MHz、25MHz、30MHz、35MHz、40MHz。
Further, the device used in a kind of scaling method of high frequency partial discharge examination instrument parameter also includes high-frequency coupling
Frock, tested high frequency sensors are installed in high-frequency coupling frock to obtain when demarcating the parameter of high frequency partial discharge detector
To coupled signal.
Further, the device used in a kind of scaling method of high frequency partial discharge examination instrument parameter also includes observing and controlling calculating
Machine；Detection high frequency partial discharge detector tested high frequency sensors transfer impedance in, Measurement ＆control computer respectively with arbitrarily
Waveform generator connects with high-speed digital filter；In the detection frequency of detection high frequency partial discharge detector, observing and controlling calculates
Machine is connected with AWG, high-speed digital filter, high frequency partial discharge detector respectively；Put in detection high frequency partial
The sensitivity of electro-detection instrument, the linearity for detecting high frequency partial discharge detector, detection high frequency partial discharge detector are anti-interference
In property, Measurement ＆control computer is connected with AWG and high frequency partial discharge detector respectively.
Further, the tested high frequency sensors include Rogowsky coil.
The parameter of high frequency partial discharge detector is demarcated with the present invention, testing result is expressed as unified amount
Guiding principle, reflect the physical essence of measurand；And the structure of tested high frequency sensors is considered, fully demonstrate the actual inspection of its engineering
Survey ability；The present invention uses high-frequency coupling frock, and its shield effectiveness is high, and test result is stable, small by external environmental interference.
Brief description of the drawings
Fig. 1 is the connection electricity of the transfer impedance for the tested high frequency sensors that high frequency partial discharge detector is detected in the present invention
Road schematic diagram；
Fig. 2 is the connection circuit diagram for the detection frequency that high frequency partial discharge detector is detected in the present invention；
Fig. 3 be in the present invention detect high frequency partial discharge detector sensitivity and detection high frequency partial discharge detector it is linear
The connection circuit diagram of degree；
Fig. 4 is the connection circuit diagram that high frequency partial discharge detector anti-interference is detected in the present invention；
Wherein：U s WithU p For random waveform sensor output signal,R 0 It is tested high frequency sensors, M1 for noninductive resistance, HFCT
For high speed digital oscilloscope, M0 be high frequency partial discharge detector,C 0 For injection electric capacity,RsTo disturb resistance；CH1 and CH2 are
High-speed oscilloscope M1 two passages.
Embodiment
In order to be better understood from the present invention, the invention will be further described with specific embodiment below in conjunction with the accompanying drawings：
A kind of scaling method of high frequency partial discharge examination instrument parameter, device used in this method include random waveform
Device, noninductive resistance R0, high speed digital oscilloscope M1, injection electric capacity C0, interference resistance Rs, high-frequency coupling frock, Measurement ＆control computer；
High frequency partial discharge detector includes tested high frequency sensors HFCT；
This method by detect the transfer impedance of high frequency partial discharge detector, the detection frequency of high frequency partial discharge detector,
The sensitivity of high frequency partial discharge detector, the linearity of high frequency partial discharge detector, high frequency partial discharge detector are anti-dry
Immunity is demarcated to high frequency partial discharge detector, and specific method is as follows：
（1）Detect the transfer impedance of the tested high frequency sensors of high frequency partial discharge detector：
As shown in figure 1, tested high frequency sensors HFCT is installed in high-frequency coupling frock and carries out shielding, Measurement ＆control computer leads to
Cross Ethernet interface to be connected with high speed digital oscilloscope M1, Measurement ＆control computer is sent out by USB port and USB port control line with arbitrary signal
Raw device connection, the output end of arbitrarily signal generating device are connected by coaxial cable with the input of high-frequency coupling frock, high frequency coupling
Close the output end and noninductive resistance of frockR 0 One end connected by wire, noninductive resistanceR 0 The other end be connected to by wire
The input of AWG, tested high frequency sensors HFCT output end are connected to high-speed figure by coaxial cable and shown
Ripple device M1 CH1 passages, and high speed digital oscilloscope M1 CH2 passages are connected to noninductive resistanceR 0 Both ends, so form
Test loop.
The adjustable sine voltage signal of AWG output frequencyU s , high-speed figure is shown by Measurement ＆control computer
Ripple device M1 is arranged to suitable acquisition state, sine voltage signalU s Corresponding frequencies, peak-peak are produced in high-frequency coupling frock
It is worth the sinusoidal current signal between 10mA~30mA；Tested high frequency sensors HFCT couples the sinusoidal current signal rate of change and touched
Hair high speed digital oscilloscope M1 is acquired, the high speed digital oscilloscope M1 tested high frequency sensors HFCT's of CH1 passages collection
Output voltage, high speed digital oscilloscope M1 CH2 passages collect noninductive resistance simultaneouslyR 0 The voltage signal at both ends, high-speed figure
The data that oscillograph M1 is collected are uploaded to Measurement ＆control computer by USB port control line；Measurement ＆control computer calculates tested height and kept pouring in
Sensor HFCT and preserves corresponding data in the transfer impedance characteristic curve of respective frequencies；
Voltage signal is adjusted in the range of 3MHz~30MHzU s Frequencyf, measured simultaneously in voltage with high speed digital oscilloscope M1
SignalU s Different frequencyfTested high frequency sensors HFCT output voltage downV 2 (f)And noninductive resistanceR 0 The voltage at both endsV 1 (f), by formula（1）Try to achieve respective frequenciesfThe transfer impedance value of lower high frequency partial discharge detector；Measurement ＆control computer is to high speed number
The data that word wave filter collects carry out statistics draw, and the transmission resistance of tested height sensors is used as using the average value after calculating
The result of anti-characteristic；
；（1）
In formula：Z(f)It is in input voltage signalU s FrequencyfThe tested high frequency sensors of lower high frequency partial discharge detector
Transfer impedance value；R 0 It is the resistance of noninductive resistance；V 2 (f)- in input voltage signalU s FrequencyfLower high frequency partial discharge examination
The output voltage of the tested high frequency sensors of instrument；V 1 (f)- in input voltage signalU s FrequencyfLower noninductive resistanceR 0 Both ends
Output voltage.
（2）Detect the detection frequency of high frequency partial discharge detector：
As shown in Fig. 2 tested high frequency sensors HFCT is installed in high-frequency coupling frock and carries out shielding, Measurement ＆control computer leads to
Ethernet interface is crossed to be connected with high speed digital oscilloscope M1, high frequency partial discharge detector M0, Measurement ＆control computer by USB port and
USB port control line is connected with arbitrarily signal generating device, and the output end of arbitrarily signal generating device passes through coaxial cable and high-frequency coupling
The input connection of frock, the output end and noninductive resistance of high-frequency coupling frockR 0 One end connected by wire, noninductive resistanceR 0
The other end be connected to the input of AWG by wire, tested high frequency sensors HFCT output end passes through same
Shaft cable is connected to high frequency partial discharge detector M0, and using high speed digital oscilloscope M1 measurement noninductive resistancesR 0 The electricity at both ends
Signal is pressed, so forms test loop.
The adjustable voltage signal of AWG output frequencyU s , voltage signalU s Produced in high-frequency coupling frock
Corresponding frequencies, peak-to-peak value between 5mA~10mA sinusoidal current signal；Tested high frequency sensors HFCT couples sine electricity
Flow change rate signal；Voltage signal is adjusted in the range of 0.5MHz~50MHzU s Frequency, surveyed by high speed digital oscilloscope M1
Measure noninductive resistanceR 0 The voltage at both ends is so as to standby current, in adjustment voltage signalU s Frequency when keep current value it is constant；High frequency
Partial discharge detector M0 shows corresponding during the full-scale reading of the sinusoidal current signal of tested high frequency sensors HFCT couplings
Frequency be detect frequency；When high frequency partial discharge detector M0 shows full-scale reading corresponding frequency should be located at 3MHz~
In 30MHz frequency ranges, and 6dB bandwidth is no less than 2MHz.
（3）Detect the sensitivity of high frequency partial discharge detector：
As shown in figure 3, tested high frequency sensors HFCT is installed in high-frequency coupling frock and carries out shielding, Measurement ＆control computer leads to
Cross Ethernet interface to be connected with high frequency partial discharge detector M0, Measurement ＆control computer passes through USB port and USB port control line and any letter
The connection of number generator, the output end of arbitrarily signal generating device pass through wire and injection electric capacityC 0 One end connection, inject electric capacityC 0 's
The other end is connected with the input of high-frequency coupling frock, the output end of high-frequency coupling frock and the input of arbitrarily signal generating device
Connect and be grounded, tested high frequency sensors HFCT output end is connected to high frequency partial discharge detector by coaxial cable, such as
This forms test loop.
AWG voltage pulse output signalU p , by injecting electric capacity C0Pulse electricity is produced in test loop
Stream, the local discharge signal that simulation Apparent discharge magnitude is Q, and the arteries and veins in test loop is detected by high frequency partial discharge detector M0
Rush electric current；And calculate pulse current and injection electric capacity that high frequency partial discharge detector M0 is detectedC 0 Produced in test loop
Pulse current signal to noise ratio, signal to noise ratio is higher, shows that the sensitivity of high frequency partial discharge detector is higher；Wherein, C0To inject the value of electric capacity；Inject electric capacity C0The high-frequency ceramic electric capacity of value selection 100pF ± 2%；WhenQFor 50pC
When, high frequency partial discharge detector should be with not less than 2：1 signal to noise ratio shows the pulse current detected.
（4）Detect the linearity of high frequency partial discharge detector：
As shown in figure 3, tested high frequency sensors HFCT is installed in high-frequency coupling frock and carries out shielding, Measurement ＆control computer leads to
Cross Ethernet interface to be connected with high frequency partial discharge detector M0, Measurement ＆control computer passes through USB port and USB port control line and any letter
The connection of number generator, the output end of arbitrarily signal generating device pass through wire and injection electric capacityC 0 One end connection, inject electric capacityC 0 's
The other end is connected with the input of high-frequency coupling frock, the output end of high-frequency coupling frock and the input of arbitrarily signal generating device
Connect and be grounded, tested high frequency sensors HFCT output end is connected to high frequency partial discharge detector by coaxial cable, such as
This forms test loop.
AWG voltage pulse output signalU p , by injecting electric capacityC 0 Pulse electricity is produced in test loop
Stream, the local discharge signal that simulation Apparent discharge magnitude is Q, and the arteries and veins in test loop is detected by high frequency partial discharge detector M0
Rush electric current；The pulse voltage signal exported by adjusting AWGU p The voltage amplitude of output, produce apparent electric discharge
Amount is respectivelyQ 1 WithQ 2 Local discharge signal, high frequency partial discharge detector M0 detects Apparent discharge magnitude and is respectively respectivelyQ 1 WithQ 2 Local discharge signal, respectively record high frequency partial discharge detector M0 show detected by signal amplitudeV 1 WithV 2 ；
If the signal amplitude that high frequency partial discharge detector M0 is shown is linear graduation value, such as signal amplitude is using mV to be single
Position, then the linearity error of high frequency partial discharge detector presses formula（2）Calculate：
；（2）
If the signal amplitude that high frequency partial discharge detector M0 is shown is logarithmic scale value, such as signal amplitude is using dB to be single
Position, then the linearity error of high frequency partial discharge detector presses formula（3）Calculate：
；（3）
Formula（2）And formula（3）In：ε is the linearity error of high frequency partial discharge detector；Q 2 、Q 1 To adjust random waveform
The pulse voltage signal of generator outputU p Apparent discharge magnitude caused by the voltage amplitude of output；Q 2 、Q 1 Value it is unequal；V 1 For
Inputting Apparent discharge magnitude isQ 1 When high frequency partial discharge detector show detected signal amplitude；V 2 For input apparent electric discharge
Measure and beQ 2 When high frequency partial discharge detector show detected signal amplitude；Q 1 Select 50pC,Q 2 Select 5000pC.
（5）Detect high frequency partial discharge detector anti-interference：
As shown in figure 4, detection high frequency partial discharge detector anti-interference uses 2 AWGs；Wherein 1 any
Waveform generator is used for voltage pulse output signalU p , another AWG is used for output AC voltage signalU s , survey
Control computer is connected by Ethernet interface with high frequency partial discharge detector M0, and Measurement ＆control computer is controlled by USB port and USB port
Line is connected with two arbitrarily signal generating devices, voltage pulse output signalU p AWG output end with injection electricity
HoldC 0 One end connection, inject electric capacityC 0 The other end be connected with tested high frequency sensors HFCT, be detected high frequency sensors HFCT with
Voltage pulse output signalU p The input of AWG connect and be grounded；
Output AC voltage signalU s Random waveform oscillograph output end with disturb resistance Rs one end be connected, interference resistance
The Rs other end is connected in series with tested high frequency sensors HFCT, is detected high frequency sensors HFCT and output AC voltage signalU s
Random waveform oscillograph input connection, high frequency partial discharge detector M0 is connected with tested high frequency sensors HFCT, such as
This forms test loop；
Pass through voltage pulse output signalU p AWG and injection electric capacityC 0 Apparent is produced in test loop to put
Electricity is Q pulse current, and detects the pulse current in test loop by high frequency partial discharge detector M0；Handed over by exporting
Flow voltage signalU s Random waveform oscillograph through disturb resistance Rs produce interference electric currentI s , while it is applied to tested high frequency sensing
On device HFCT, ac voltage signal is adjustedU s Output frequency to obtain the interference electric current of different frequencyI s , record Apparent discharge magnitude
Q, interference electric currentI s Peak-to-peak value and the pulse currents that detect of corresponding high frequency partial discharge detector M0 and injection electric capacityC 0 The caused pulse current in test loopI s Signal to noise ratio, interference resistance Rs selectionR 0 Select as the resistance of 50 Ω ± 0.2%,
Ac voltage signalU s Frequency selection 50kHz, 500kHz, 1MHz, 2MHz, 5MHz, 10MHz, 15MHz, 20MHz, 25MHz,
30MHz、35MHz、40MHz.When tested Apparent discharge magnitude Q is 50pC, interference electric currentI s Peak-to-peak value when being 25mA, high frequency office
Portion's discharge detector can be with not less than 2：1 signal to noise ratio shows the pulse current detected.
Tested high frequency sensors HFCT includes Rogowsky coil, AWG selection Agilent random waveform
Generator, the working frequency of high-frequency coupling frock is 0 ~ 120MHz, and working band standing internal wave is than ＜ 1.5, high speed digital oscilloscope
Analog bandwidth be not less than 100MHz.
The present invention is not limited to above-described embodiment, the foregoing is only the preferable case study on implementation of the present invention
, it is not intended to limit the invention, any modification for being made within the spirit and principles of the invention, equivalent substitution and changes
Enter, should be included in the scope of the protection.
Claims (5)
- A kind of 1. scaling method of high frequency partial discharge examination instrument parameter, it is characterised in that：Device includes used in this method AWG, noninductive resistance, high speed digital oscilloscope, injection electric capacity, interference resistance；High frequency partial discharge detector bag Include tested high frequency sensors；This method by detect the transfer impedance of high frequency partial discharge detector, the detection frequency of high frequency partial discharge detector, The sensitivity of high frequency partial discharge detector, the linearity of high frequency partial discharge detector, high frequency partial discharge detector are anti-dry Immunity is demarcated to high frequency partial discharge detector, and specific method is as follows：（1）Detect the transfer impedance of the tested high frequency sensors of high frequency partial discharge detector：AWG is connected with noninductive resistance, the tested high frequency sensors of noninductive resistance and high frequency partial discharge detector Connection, the tested high frequency sensors of high frequency partial discharge detector are connected with AWG, so form test loop；The adjustable voltage signal of AWG output frequencyU s , corresponding frequencies, peak-to-peak value are produced in test loop Between 10mA~30mA sinusoidal current signal；Voltage signal is adjusted in the range of 3MHz~30MHzU s Frequencyf, with a high speed Digital oscilloscope is measured in voltage signal simultaneouslyU s Different frequencyfThe output voltage of tested high frequency sensors downV 2 (f)It is and noninductive ResistanceR 0 The voltage at both endsV 1 (f), by formula（1）Try to achieve respective frequenciesfThe transfer impedance value of lower high frequency partial discharge detector；；（1）In formula：Z(f)It is in input voltage signalU s FrequencyfThe biography of the tested high frequency sensors of lower high frequency partial discharge detector Defeated impedance value；R 0 It is the resistance of noninductive resistance；V 2 (f)- in input voltage signalU s FrequencyfLower high frequency partial discharge detector Tested high frequency sensors output voltage；V 1 (f)- in input voltage signalU s FrequencyfLower noninductive resistanceR 0 Both ends it is defeated Go out voltage；（2）Detect the detection frequency of high frequency partial discharge detector：AWG is connected with noninductive resistance, and noninductive resistance is connected with tested high frequency sensors, is detected high frequency sensors It is connected with AWG, high frequency partial discharge detector is so formed and surveyed by tested high frequency sensors reception signal Try loop；The adjustable voltage signal of AWG output frequencyU s , pass throughR 0 In test loop produce corresponding frequencies peak- Sinusoidal current signal of the peak value between 5mA~10mA；Voltage signal is adjusted in the range of 0.5MHz~50MHzU s Frequency, lead to The voltage at high-speed figure oscilloscope measurement noninductive resistance both ends is crossed so as to standby current, in adjustment voltage signalU s Frequency when protect It is constant to hold current value；High frequency partial discharge detector shows that frequency corresponding during full-scale reading is to detect frequency；（3）Detect the sensitivity of high frequency partial discharge detector：AWG and injection capacitance connection, injection electric capacity are connected with tested high frequency sensors, are detected high frequency sensors It is connected and is grounded with AWG, high frequency partial discharge detector is by being detected high frequency sensors reception signal, so Form test loop；AWG voltage pulse output signalU p , pulse current is produced in test loop by injecting electric capacity, is simulated Apparent discharge magnitude is Q local discharge signal, and detects the pulse current in test loop by high frequency partial discharge detector；And Calculate pulse current and injection electric capacity that high frequency partial discharge detector detectsC 0 The caused pulse current in test loop Signal to noise ratio, signal to noise ratio is higher, shows that the sensitivity of high frequency partial discharge detector is higher；Wherein, C0For note Enter the value of electric capacity；（4）Detect the linearity of high frequency partial discharge detector：AWG and injection capacitance connection, injection electric capacity are connected with tested high frequency sensors, are detected high frequency sensors It is connected and is grounded with AWG, high frequency partial discharge detector is by being detected high frequency sensors reception signal, so Form test loop；AWG voltage pulse output signalU p , pulse current is produced in test loop by injecting electric capacity, is simulated The local discharge signal of Apparent discharge magnitude, and the pulse current in test loop is detected by high frequency partial discharge detector；Pass through Adjust the pulse voltage signal of AWG outputU p The voltage amplitude of output, producing Apparent discharge magnitude is respectivelyQ 1 WithQ 2 Local discharge signal, high frequency partial discharge detector detects Apparent discharge magnitude and is respectively respectivelyQ 1 WithQ 2 Shelf depreciation letter Number, high frequency partial discharge detector is recorded respectively shows detected signal amplitudeV 1 WithV 2 ；If the signal amplitude that high frequency partial discharge detector is shown is linear graduation value, the line of high frequency partial discharge detector Property degree error presses formula（2）Calculate：；（2）If the signal amplitude that high frequency partial discharge detector is shown is logarithmic scale value, the line of high frequency partial discharge detector Property degree error presses formula（3）Calculate：；（3）Formula（2）And formula（3）In：ε is the linearity error of high frequency partial discharge detector；Q 2 、Q 1 For regulation random waveform hair The pulse voltage signal of raw device outputU p Apparent discharge magnitude caused by the voltage amplitude of output；Q 2 、Q 1 Value it is unequal；V 1 To be defeated Entering Apparent discharge magnitude isQ 1 When high frequency partial discharge detector show detected signal amplitude；V 2 To input Apparent discharge magnitude ForQ 2 When high frequency partial discharge detector show detected signal amplitude；（5）Detect high frequency partial discharge detector anti-interference：Detection high frequency partial discharge detector anti-interference uses 2 AWGs；Wherein 1 AWG For voltage pulse output signalU p , another AWG is used for output AC voltage signalU s , voltage pulse output SignalU p AWG with injection capacitance connection, injection electric capacity be connected with tested high frequency sensors, tested height is kept pouring in Sensor and voltage pulse output signalU p AWG connect and be grounded；Output AC voltage signalU s Random waveform oscillograph be connected with interference resistance, disturb resistance and tested high frequency sensors It is connected in series, is detected high frequency sensors and output AC voltage signalU s Random waveform oscillograph connection, high frequency partial electric discharge Detector so forms test loop by tested high frequency sensors reception signal；Pass through voltage pulse output signalU p AWG and injection electric capacity, in test loop produce apparent electric discharge The pulse current for Q is measured, and the pulse current in test loop is detected by high frequency partial discharge detector；By exporting alternating current Press signalU s Random waveform oscillograph through disturb resistance produce interference electric currentI s , while be applied in tested high frequency sensors, adjust Whole ac voltage signalU s Output frequency to obtain the interference electric current of different frequencyI s , record Apparent discharge magnitude Q, interference electric currentI s Peak-to-peak value and the pulse current that detects of corresponding high frequency partial discharge detector with injection electric capacity in test loop The signal to noise ratio of caused pulse current.
- A kind of 2. scaling method of high frequency partial discharge examination instrument parameter according to claim 1, it is characterised in that：It is described Detect ac voltage signal in high frequency partial discharge detector anti-interferenceU s Frequency selection 50kHz, 500kHz, 1MHz, 2MHz、5MHz、10MHz、15MHz、20MHz、25MHz、30MHz、35MHz、40MHz。
- A kind of 3. scaling method of high frequency partial discharge examination instrument parameter according to claim 1, it is characterised in that：The party Device used in method also includes high-frequency coupling frock, keeps pouring in tested height when demarcating the parameter of high frequency partial discharge detector Sensor is installed in high-frequency coupling frock to obtain coupled signal.
- A kind of 4. scaling method of high frequency partial discharge examination instrument parameter according to claim 1, it is characterised in that：The party Device used in method also includes Measurement ＆control computer；In the transmission of the tested high frequency sensors of detection high frequency partial discharge detector In impedance, Measurement ＆control computer is connected with AWG and high-speed digital filter respectively；In detection high frequency partial electric discharge In the detection frequency of detector, Measurement ＆control computer discharges with AWG, high-speed digital filter, high frequency partial respectively Detector connects；Sensitivity, the linearity of detection high frequency partial discharge detector, inspection in detection high frequency partial discharge detector Survey in high frequency partial discharge detector anti-interference, Measurement ＆control computer is examined with AWG and high frequency partial electric discharge respectively Survey instrument connection.
- A kind of 5. scaling method of high frequency partial discharge examination instrument parameter according to claim 1, it is characterised in that：It is described Tested high frequency sensors include Rogowsky coil.
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