CN106199478A - The examination calibration equipment of a kind of high frequency electric method Partial discharge detector and method - Google Patents
The examination calibration equipment of a kind of high frequency electric method Partial discharge detector and method Download PDFInfo
- Publication number
- CN106199478A CN106199478A CN201610526324.8A CN201610526324A CN106199478A CN 106199478 A CN106199478 A CN 106199478A CN 201610526324 A CN201610526324 A CN 201610526324A CN 106199478 A CN106199478 A CN 106199478A
- Authority
- CN
- China
- Prior art keywords
- signal
- partial discharge
- high frequency
- source
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses examination calibration equipment and the method for a kind of high frequency electric method Partial discharge detector, this device includes signal driving source, build-out resistor R0, inject electric capacity C0, the first metallic test bar, the second metallic test bar, oscillograph, 50 Ω coaxial cables, tested instrument includes partial discharge detection instrument and high frequency sensors；Described signal driving source is device built-in signal source, is divided into sine wave source and pulse calibration source；Described build-out resistor R0Concatenation sine wave source and the combination of the first metallic test bar form sinusoidal signal loop；Described injection electric capacity C0 concatenation pulse calibration source and the combination of the second metallic test bar form pulse signal loop；The present invention easily realizes, it is simple and quick to debug, test process is convenient and swift, the present invention also unrestricted choice built-in signal source and external signal source can carry out signal input, it is adaptable to the routine maintenance of electric power detection industry medium-high frequency Partial discharge detector, test, the occasion such as verification.
Description
Technical field
The present invention relates to high pressure detection technique field, be specifically related to the examination of a kind of high frequency electric method Partial discharge detector
Calibration equipment and method for designing.
Background technology
In high pressure detection technique field, going out current situation and put inside power equipment, the pulse current of generation passes through down conductor
Guide to underground, simultaneously electric current flow through earth lead will the change of band moving field, by high frequency sensors is clipped in down conductor
On, high frequency sensors Inside coil, under the effect of electromagnetic induction, is converted into the signal of telecommunication to partial discharge detection instrument.But due to height
Frequently office to put tester performance very different, lack unified qualification platform, leverage power equipment partial discharge detection knot
The validity and reliability of fruit, the safe operation to power equipment can bring major hidden danger, therefore a kind of high frequency electric method of design
The examination verification method for designing of Partial discharge detector is significant.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that the examination verification of a kind of high frequency electric method Partial discharge detector
Device and method for designing.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector, described device includes that signal encourages
Source, build-out resistor R0, inject electric capacity C0, the first metallic test bar, the second metallic test bar, oscillograph, 50 Ω coaxial cables, quilt
Survey instrument and include partial discharge detection instrument and high frequency sensors；Described signal driving source is device built-in signal source, is divided into sine wave
Signal source and pulse calibration source；Described build-out resistor R0Concatenation sine wave source and the combination of the first metallic test bar are just being formed
String signal loop；Described injection electric capacity C0Concatenation pulse calibration source and the combination of the second metallic test bar form pulse signal and return
Road；Two described metallic test bars are used as transmission high-frequency current signal；Described high frequency sensors (HFCT) punching is inserted in gold
Belonging to reference test bar, high frequency sensors outfan is connected to oscillograph or partial discharge detection instrument；Oscillograph high resistant voltage probe is with described
Build-out resistor two ends connect, and high frequency sensors and partial discharge detection instrument are connected by 50 Ω coaxial cables.
Described signal driving source is divided into sine wave source and pulse calibration source, can be that examination calibration equipment provides width
Value, the continuous sine wave signal of frequency-adjustable, pulse signal；Described sine wave signal waveform output amplitude 0～10V is adjustable,
Output frequency 50kHz～120MHz is adjustable；Described output of pulse signal amplitude 1mV～10V are adjustable, during pulse signal rising edge
Between (10%～90%) be not more than 5ns, die-away time (90%～10%) be not less than 200ns.Described signal driving source is externally provided with
Control panel, described control panel is provided with power supply and switch, wiring and interface, display part, button four part；Described electricity
Source and switch for internal signal driving source power supply interface and control switch；Described wiring and interface are for internal signal driving source
Signal output interface, exportable sinusoidal signal, pulse signal, synchronizing signal；Described display part is divided into internal signal driving source defeated
Go out the parameter such as signal amplitude, frequency to show；Described button be control internal signal driving source output signal waveform, amplitude,
Frequency etc..
Described build-out resistor R0For noninductive resistance, resistance size is 50 Ω ± 0.2%, build-out resistor concatenation sine wave letter
Number source and the combination of metallic test bar form sinusoidal signal loop, produce sinusoidal current signal in the loop, for sensor transmissions
Impedance, the detection project such as frequency, interference free performance test.
Described injection electric capacity C0For high-frequency ceramic electric capacity, capacitance size is 100pF ± 2%, injects electric capacity C0Concatenation pulse
Demarcation source and the combination of metallic test bar form pulse signal loop, produce pulsed current signal in the loop, are used for detecting sensitive
The project tests such as degree, the linearity, interference free performance, step-by-step counting, diagnosis identification.
Described metallic test bar has two, is respectively applied to sinusoidal signal loop and pulse signal loop, is used as transmission height
Frequently current signal ground connection, the body of rod itself uses metallic copper to make, has good electric conductivity, and resistivity is low, signal attenuation
Little.
Described oscillograph is for gathering build-out resistor two ends and the voltage signal of high frequency sensors collection, signal measurement band
Width is not less than 100MHz.
50 described Ω coaxial cables are used for connecting each loop, as signal transmission lead-in wire.
Described high frequency sensors, for gathering the high-frequency current signal of signal circuit, is drawn by 50 Ω coaxial cable signals
Line is transferred to partial discharge detection instrument.
Examination calibration equipment based on above-mentioned high frequency electric method Partial discharge detector, the invention provides a kind of high-frequency electrical
The examination verification method for designing of Liu Fa Partial discharge detector, concrete grammar includes:
Sensor transmissions testing impedance
Selecting sine wave source input sinusoidal signal, high frequency sensors is connected to oscillograph by signal cable, coupling
Resistance R0Two ends end is connected to oscillograph high resistant voltage probe by signal cable.
Step one: the regulation adjustable voltage of sine wave source output frequency, produces respective tones in sinusoidal signal loop
Rate, peak-to-peak value are between the sinusoidal current signal of 10mA-30mA；
Step 2: regulate sine wave source output frequency in the range of 3MHz～30MHz, measure not with oscillograph simultaneously
The output voltage V of high frequency sensors (HFCT) under same frequency f2(f) and build-out resistor R0The voltage V at two ends1(f)；
Step 3: according to formula Z (f)=R0(V2(f)/V1(f)) calculate the transfer impedance of this frequency lower sensor.
Conclusion: if the transfer impedance that high frequency sensors is in 3MHz～30MHz band limits is not less than 5Mv/mA, then this biography
Sensor meets performance check requirements.
Detection frequency band test
Selecting sine wave source input sinusoidal signal, high frequency sensors is connected to partial discharge detection instrument by signal cable,
Build-out resistor R0Two ends are connected to oscillograph high resistant voltage probe by signal cable.
Step one: regulation the adjustable voltage of sine wave source output frequency, in test loop produce corresponding frequencies,
Peak-to-peak value is between the sinusoidal current signal of 5mA-10mA；
Step 2: change the frequency of sine wave signal in the range of 0.5MHz～50MHz, by oscilloscope measurement coupling electricity
Resistance R0The voltage at two ends, monitoring circuit electric current, keep electric current constant when adjusting frequency；
Step 3: find out full-scale reading that partial discharge detection instrument (containing HFCT) shows (or analogue signal port output maximum
Amplitude) time corresponding frequency f.
Conclusion: if frequency f is positioned at the frequency range of 3MHz～30MHz and 6dB bandwidth not less than 2MHz, then this meeting property of instrument
Can check requirements.
Sensitivity test
Strobe pulse demarcates source input pulse signal, and high frequency sensors is connected to partial discharge detection instrument by signal cable.
Step one: regulation pulse calibration source UpVoltage pulse output, by injecting electric capacity C0Pulse is produced in test loop
Electric current, simulation apparent charge amount is Q (Up×C0) local discharge signal；
Step 2: by the pulse current of partial discharge detection instrument (containing HFCT) detection test loop, find out when Q is 50pC, office
Put the signal to noise ratio of the detected signal of detector.
Conclusion: if partial discharge detection instrument signal to noise ratio is not less than 2:1, then this instrument meets Performance Assessment requirement, and signal to noise ratio is the highest,
Show that instrument detection sensitivity is the highest.
Linearity error is tested
Strobe pulse demarcates source input pulse signal, and high frequency sensors is connected to partial discharge detection instrument by signal cable.
Step one: regulation pulse calibration source UpOutput voltage amplitude, produces apparent charge Q of about 50pC1, inspection is put in record office
Survey the measurement signal amplitude V shown by instrument (containing HFCT)1；
Step 2: regulation pulse calibration source UpOutput voltage amplitude, produces apparent charge Q of about 5000pC2, record office puts
Measurement signal amplitude V shown by detector (containing HFCT)2；
Step 3: if the signal amplitude that partial discharge detection instrument shows is linear graduation value, linearity error formula be ε=
abs(1-(V2/V1)/(Q2/Q1))×100；If the signal amplitude that partial discharge detection instrument shows is logarithmic scale value, the linearity is by mistake
Difference formula isAbs represents and takes absolute value.
Conclusion: if the dynamic range of local discharge signal is 40dB, detection linearity error is not more than 15%, then this instrument
Device meets Performance Assessment requirement.
Stability test
Strobe pulse demarcates source input signal, and high frequency sensors is connected to partial discharge detection instrument by signal cable.
Step one: the pulse signal of regulation pulse calibration source output constant amplitude, writes down when partial discharge detection instrument is just started shooting
Detection signal amplitude a；
Step 2: worked continuously by partial discharge detection instrument 1 hour, writes down the detection signal amplitude b of now partial discharge detection instrument；
Step 3: according to record value and formula (| b-a |/a) * 100% computational stability error.
Conclusion: if the detection peak change that partial discharge detection instrument detects is less than positive and negative 10%, then meet instrument examination property
Can requirement.
6. anti-interference test
Sine signal source input sine wave signal, pulse calibration source input pulse signal, high frequency sensors is by signal electricity
Cable is connected to partial discharge detection instrument.
Step one: by pulse calibration source UpWith injection electric capacity C0, producing apparent charge amount in test loop is the height of Q
Frequently pulse current, uses sine wave source U simultaneouslysThrough resistance R0(50 Ω) produces the interference electric current of different frequency, is simultaneously applied to
The input of tested sensor (HFCT)；
Step 2: in the case of any given frequency interferences electric current, when tested apparent charge amount Q is 50pC, interference electricity
When the peak-to-peak value of stream is 25mA, observe the detection signal that partial discharge detection instrument shows；
Step 3: change sine wave signal source frequency be 50kHz, 500kHz, 1MHz, 2MHz, 5MHz, 10MHz, 15MHz,
20MHz, 25MHz, 30MHz, 35MHz, 40MHz, repeat the above steps.
Conclusion: if the signal that partial discharge detection instrument can detect under the interference current conditions of different frequency has and is not less than 2:
The signal to noise ratio of 1, then this instrument interference free performance is good.
Benefit produced by the present invention
The present invention easily realizes, it is simple and quick to debug, test process is convenient and swift, and test event includes: sensor transmissions
The tests such as impedance, detection frequency band, sensitivity, the linearity, stability, anti-interference, and energy unrestricted choice built-in signal source is with outer
Put signal source and carry out signal input, it is adaptable to the routine maintenance of electric power detection industry medium-high frequency Partial discharge detector, test, school
The occasion such as test.
Accompanying drawing explanation
Fig. 1 is high frequency electric method Partial discharge detector calibration equipment schematic diagram；
Fig. 2 is sensor transmissions impedance experiments wiring diagram；
Fig. 3 is detection frequency test wiring diagram；
Fig. 4 is sensitivity, linearity test and stability test wiring diagram；
Fig. 5 is interference free performance test connection figure.
Detailed description of the invention
As it is shown in figure 1, a kind of examination calibration equipment based on high frequency electric method Partial discharge detector, described device bag
Include signal driving source, build-out resistor R03, electric capacity C is injected04, the first metallic test bar, the second metallic test bar, oscillograph 7,50
Ω coaxial cable 9, tested instrument includes partial discharge detection instrument 6 and high frequency sensors 5；Described signal driving source is confidence in device
Number source, is divided into sine wave source 1 and pulse calibration source 2；Described build-out resistor R0Concatenation sine wave source and the first gold medal
Belong to reference test bar combination and form sinusoidal signal loop；Described injection electric capacity C0Concatenation pulse calibration source and the second metallic test bar group
Close and form pulse signal loop；Two described metallic test bars are used as transmission high-frequency current signal；Described high frequency sensors
(HFCT) punching is inserted in metallic test bar, and high frequency sensors outfan is connected to oscillograph or partial discharge detection instrument；Oscillograph high resistant
Voltage probe is connected with described build-out resistor two ends.
Described signal driving source is divided into sine wave source 1 and pulse calibration source 2, can be that examination calibration equipment provides
Amplitude, the continuous sine wave signal of frequency-adjustable, pulse signal；Described sine wave signal waveform output amplitude 0～10V can
Adjusting, output frequency 50kHz～120MHz is adjustable；Described output of pulse signal amplitude 1mV～10V are adjustable, and pulse signal rises
Being not more than 5ns along the time (10%～90%), die-away time (90%～10%) is not less than 200ns.Outside described signal driving source
Being provided with control panel, described control panel is provided with power supply and switch, wiring and interface, display part, button four part；Described
Power supply and switch for internal signal driving source power supply interface and control switch；Described wiring and interface swash for internal signal
Encourage source signal output interface, exportable sinusoidal signal, pulse signal, synchronizing signal；Described display part is divided into internal signal to encourage
The parameters such as source output signal amplitude, frequency show；Described button is to control the signal waveform of internal signal driving source output, width
Value, frequency etc..
Described build-out resistor R0For noninductive resistance, resistance size is 50 Ω ± 0.2%, build-out resistor concatenation sine wave letter
Number source and the combination of metallic test bar form sinusoidal signal loop, produce sinusoidal current signal in the loop, for sensor transmissions
Impedance, the detection project such as frequency, interference free performance test.
Described injection electric capacity C0For high-frequency ceramic electric capacity, capacitance size is 100pF ± 2%, injects electric capacity C0Concatenation pulse
Demarcation source and the combination of metallic test bar form pulse signal loop, produce pulsed current signal in the loop, are used for detecting sensitive
The project tests such as degree, the linearity, interference free performance, step-by-step counting, diagnosis identification.
Described metallic test bar has two, is respectively applied to sinusoidal signal loop and pulse signal loop, is used as transmission height
Frequently current signal ground connection, the body of rod itself uses metallic copper to make, has good electric conductivity, and resistivity is low, signal attenuation
Little.
Described oscillograph is for gathering build-out resistor two ends and the voltage signal of high frequency sensors collection, signal measurement band
Width is not less than 100MHz.
50 described Ω coaxial cables are used for connecting each loop, as signal transmission lead-in wire.
Described high frequency sensors, for gathering the high-frequency current signal of signal circuit, is drawn by 50 Ω coaxial cable signals
Line is transferred to partial discharge detection instrument.
Examination calibration equipment based on above-mentioned high frequency electric method Partial discharge detector, the invention provides a kind of high-frequency electrical
The examination verification method for designing of Liu Fa Partial discharge detector, concrete grammar includes:
As in figure 2 it is shown, sensor transmissions testing impedance
Selecting sine wave source 1 to input sinusoidal signal, high frequency sensors is connected to oscillograph by signal cable, coupling
Resistance R0Two ends end is connected to oscillograph high resistant voltage probe by signal cable.
Step one: the regulation adjustable voltage of sine wave source output frequency, produces respective tones in sinusoidal signal loop
Rate, peak-to-peak value are between the sinusoidal current signal of 10mA-30mA；
Step 2: regulate sine wave source output frequency in the range of 3MHz～30MHz, measure not with oscillograph simultaneously
The output voltage V of high frequency sensors (HFCT) under same frequency f2(f) and build-out resistor R0The voltage V at two ends1(f)；
Step 3: according to formula Z (f)=R0(V2(f)/V1(f)) calculate the transfer impedance of this frequency lower sensor.
Conclusion: if the transfer impedance that high frequency sensors is in 3MHz～30MHz band limits is not less than 5Mv/mA, then this biography
Sensor meets performance check requirements.
As it is shown on figure 3, detection frequency band test
Selecting sine wave source input sinusoidal signal, high frequency sensors is connected to partial discharge detection instrument by signal cable,
Build-out resistor R0Two ends are connected to oscillograph high resistant voltage probe by signal cable.
Step one: regulation the adjustable voltage of sine wave source output frequency, in test loop produce corresponding frequencies,
Peak-to-peak value is between the sinusoidal current signal of 5mA-10mA；
Step 2: change the frequency of sine wave signal in the range of 0.5MHz～50MHz, by oscilloscope measurement coupling electricity
Resistance R0The voltage at two ends, monitoring circuit electric current, keep electric current constant when adjusting frequency；
Step 3: find out full-scale reading that partial discharge detection instrument (containing HFCT) shows (or analogue signal port output maximum
Amplitude) time corresponding frequency f.
Conclusion: if frequency f is positioned at the frequency range of 3MHz～30MHz and 6dB bandwidth not less than 2MHz, then this meeting property of instrument
Can check requirements.
As shown in Figure 4, sensitivity test
Strobe pulse demarcates source input pulse signal, and high frequency sensors is connected to partial discharge detection instrument by signal cable.
Step one: regulation pulse calibration source UpVoltage pulse output, by injecting electric capacity C0Pulse is produced in test loop
Electric current, simulation apparent charge amount is Q (Up×C0) local discharge signal；
Step 2: by the pulse current of partial discharge detection instrument (containing HFCT) detection test loop, find out when Q is 50pC, office
Put the signal to noise ratio of the detected signal of detector.
Conclusion: if partial discharge detection instrument signal to noise ratio is not less than 2:1, then this instrument meets Performance Assessment requirement, and signal to noise ratio is the highest,
Show that instrument detection sensitivity is the highest.
Linearity error is tested
Strobe pulse demarcates source input pulse signal, and high frequency sensors is connected to partial discharge detection instrument by signal cable.
Step one: regulation pulse calibration source UpOutput voltage amplitude, produces apparent charge Q of about 50pC1, inspection is put in record office
Survey the measurement signal amplitude V shown by instrument (containing HFCT)1；
Step 2: regulation pulse calibration source UpOutput voltage amplitude, produces apparent charge Q of about 5000pC2, record office puts
Measurement signal amplitude V shown by detector (containing HFCT)2；
Step 3: if the signal amplitude that partial discharge detection instrument shows is linear graduation value, linearity error formula be ε=
abs(1-(V2/V1)/(Q2/Q1))×100；If the signal amplitude that partial discharge detection instrument shows is logarithmic scale value, the linearity is by mistake
Difference formula isAbs represents and takes absolute value；
Conclusion: if the dynamic range of local discharge signal is 40dB, detection linearity error is not more than 15%, then this instrument
Device meets Performance Assessment requirement.
Stability test
Strobe pulse demarcates source input signal, and high frequency sensors is connected to partial discharge detection instrument by signal cable.
Step one: the pulse signal of regulation pulse calibration source output constant amplitude, writes down when partial discharge detection instrument is just started shooting
Detection signal amplitude a；
Step 2: worked continuously by partial discharge detection instrument 1 hour, writes down the detection signal amplitude b of now partial discharge detection instrument；
Step 3: according to record value and formula (| b-a |/a) * 100% computational stability error.
Conclusion: if the detection peak change that partial discharge detection instrument detects is less than positive and negative 10%, then meet instrument examination property
Can requirement.
As it is shown in figure 5, anti-interference test
Sine signal source input sine wave signal, pulse calibration source input pulse signal, high frequency sensors is by signal electricity
Cable is connected to partial discharge detection instrument.
Step one: by pulse calibration source UpWith injection electric capacity C0, producing apparent charge amount in test loop is the height of Q
Frequently pulse current, uses sine wave source U simultaneouslysThrough resistance R0(50 Ω) produces the interference electric current of different frequency, is simultaneously applied to
The input of tested sensor (HFCT)；
Step 2: in the case of any given frequency interferences electric current, when tested apparent charge amount Q is 50pC, interference electricity
When the peak-to-peak value of stream is 25mA, observe the detection signal that partial discharge detection instrument shows；
Step 3: change sine wave signal source frequency be 50kHz, 500kHz, 1MHz, 2MHz, 5MHz, 10MHz, 15MHz,
20MHz, 25MHz, 30MHz, 35MHz, 40MHz, repeat the above steps.
Conclusion: if the signal that partial discharge detection instrument can detect under the interference current conditions of different frequency has and is not less than 2:
The signal to noise ratio of 1, then this instrument interference free performance is good.
Claims (9)
1. an examination calibration equipment based on high frequency electric method Partial discharge detector, it is characterised in that: described device bag
Include signal driving source, build-out resistor R0, inject electric capacity C0, the first metallic test bar, the second metallic test bar, oscillograph, 50 Ω with
Shaft cable；Tested instrument includes partial discharge detection instrument and high frequency sensors；Described signal driving source is device built-in signal source, point
For sine wave source and pulse calibration source；Described build-out resistor R0Concatenation sine wave source and the first metallic test bar group
Close and form sinusoidal signal loop；Described injection electric capacity C0Concatenation pulse calibration source and the combination of the second metallic test bar form pulse
Signal circuit；Two described metallic test bars are used as transmission high-frequency current signal；Described high frequency sensors punching is inserted in gold
Belonging to reference test bar, high frequency sensors outfan is connected to oscillograph or partial discharge detection instrument；Oscillograph high resistant voltage probe is with described
Build-out resistor two ends connect, and high frequency sensors and partial discharge detection instrument are connected by 50 Ω coaxial cables.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: described signal driving source is divided into sine wave source and pulse calibration source, for examination calibration equipment offer amplitude, frequently
Rate adjustable continuous sine wave signal, pulse signal；Described sine wave signal waveform output amplitude is 0～10V and adjustable, defeated
Going out frequency is 50kHz～120MHz and adjustable；Described output of pulse signal amplitude is 1mV～10V and adjustable, on pulse signal
Rising and be not more than 5ns along the time, pulse signal rising time is i.e. from 10%～90%, and die-away time is not less than 200ns, during decay
Between i.e. from 90%～10%.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: described signal driving source is externally provided with control panel, described control panel be provided with power supply and switch, wiring and interface,
Display part, button four part；Described power supply and switch for internal signal driving source power supply interface and control switch；Described
Wiring and interface are for internal signal excitation source signal output interface, exportable sinusoidal signal, pulse signal, synchronizing signal；Institute
State display part and be divided into internal signal driving source output signal amplitude, the display of frequency；Described button swashs for controlling internal signal
Encourage the signal waveform of source output, amplitude, frequency.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: described build-out resistor R0For noninductive resistance, resistance size is 50 Ω ± 0.2%.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: described injection electric capacity C0For high-frequency ceramic electric capacity, capacitance size is 100pF ± 2%.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: the body of rod of described metallic test bar itself uses metallic copper to make.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: described oscillograph is for gathering build-out resistor two ends and the voltage signal of high frequency sensors collection, signal measurement band
Width is not less than 100MHz.
A kind of examination calibration equipment based on high frequency electric method Partial discharge detector the most according to claim 1, it is special
Levy and be: described high frequency sensors, for gathering the high-frequency current signal of signal circuit, is drawn by 50 Ω coaxial cable signals
Line is transferred to partial discharge detection instrument.
The design side of the examination calibration equipment of a kind of high frequency electric the most according to claim 1 method Partial discharge detector
Method, it is characterised in that: the method specifically includes as follows:
1. sensor transmissions testing impedance
High frequency sensors being inserted in metallic test bar, selects sine wave source input sinusoidal signal, high frequency sensors is by letter
Number cable is connected to oscillograph, build-out resistor R0Two ends end is connected to oscillograph high resistant voltage probe by signal cable；
Step one: regulation the adjustable voltage of sine wave source output frequency, in sinusoidal signal loop produce corresponding frequencies,
Peak-to-peak value is between the sinusoidal current signal of 10mA-30mA；
Step 2: regulate sine wave source output frequency in the range of 3MHz～30MHz, measures different frequency with oscillograph simultaneously
The output voltage V of high frequency sensors under rate f2(f) and build-out resistor R0The voltage V at two ends1(f)；
Step 3: according to formula Z (f)=R0(V2(f)/V1(f)) calculate the transfer impedance of this frequency lower sensor；
Conclusion: if the transfer impedance that high frequency sensors is in 3MHz～30MHz band limits is not less than 5Mv/mA, then this sensor
Meet performance check requirements；
2. detection frequency band test
High frequency sensors being inserted in metallic test bar, selects sine wave source input sinusoidal signal, high frequency sensors is by letter
Number cable is connected to partial discharge detection instrument, build-out resistor R0Two ends are connected to oscillograph high resistant voltage probe by signal cable；
Step one: the regulation adjustable voltage of sine wave source output frequency, produces corresponding frequencies, peak-to-peak in test loop
It is worth the sinusoidal current signal between 5mA-10mA；
Step 2: change the frequency of sine wave signal in the range of 0.5MHz～50MHz, by oscilloscope measurement build-out resistor R0
The voltage at two ends, monitoring circuit electric current, keep electric current constant when adjusting frequency；
Step 3: find out during full-scale reading or the analogue signal port output amplitude peak that partial discharge detection instrument shows corresponding
Frequency f；
Conclusion: if frequency f is positioned at the frequency range of 3MHz～30MHz and 6dB bandwidth not less than 2MHz, then this instrument meets performance and examines
Core requirement；
3. sensitivity test
High frequency sensors is inserted in metallic test bar, and strobe pulse demarcates source input pulse signal, and high frequency sensors passes through signal
Cable is connected to partial discharge detection instrument；
Step one: regulation pulse calibration source UpVoltage pulse output, by injecting electric capacity C0Pulse electricity is produced in test loop
Stream, simulation apparent charge amount is Q (Up×C0) local discharge signal；
Step 2: by the pulse current of partial discharge detection instrument detection test loop, finding out when Q is 50pC, partial discharge detection instrument is examined
Survey the signal to noise ratio of signal；
Conclusion: if partial discharge detection instrument signal to noise ratio is not less than 2:1, then this instrument meets Performance Assessment requirement, and signal to noise ratio is the highest, shows
Instrument detection sensitivity is the highest；
4. linearity error test
High frequency sensors is inserted in metallic test bar, and strobe pulse demarcates source input pulse signal, and high frequency sensors passes through signal
Cable is connected to partial discharge detection instrument；
Step one: regulation pulse calibration source UpOutput voltage amplitude, produces apparent charge Q of about 50pC1, record partial discharge detection instrument
Shown measurement signal amplitude V1；
Step 2: regulation pulse calibration source UpOutput voltage amplitude, produces apparent charge Q of about 5000pC2, record partial discharge detection
Measurement signal amplitude V shown by instrument2；
Step 3: if the signal amplitude that partial discharge detection instrument shows is linear graduation value, linearity error formula is ε=abs (1-
(V2/V1)/(Q2/Q1))×100；If the signal amplitude that partial discharge detection instrument shows is logarithmic scale value, linearity error formula
ForAbs represents and takes absolute value；
Conclusion: if the dynamic range of local discharge signal is 40dB, detection linearity error is not more than 15%, then this instrument is full
Foot Performance Assessment requirement；
5. stability test
High frequency sensors is inserted in metallic test bar, and strobe pulse demarcates source input signal, and high frequency sensors passes through signal cable
It is connected to partial discharge detection instrument；
Step one: the pulse signal of regulation pulse calibration source output constant amplitude, writes down detection when partial discharge detection instrument is just started shooting
Signal amplitude a；
Step 2: worked continuously by partial discharge detection instrument 1 hour, writes down the detection signal amplitude b of now partial discharge detection instrument；
Step 3: according to record value and formula (| b-a |/a) * 100% computational stability error；
Conclusion: if the detection peak change that partial discharge detection instrument detects is less than positive and negative 10%, then meet instrument examination performance and want
Ask；
6. anti-interference test
High frequency sensors is inserted in metallic test bar, sine signal source input sine wave signal, and pulse calibration source input pulse is believed
Number, high frequency sensors is connected to partial discharge detection instrument by signal cable；
Step one: by pulse calibration source UpWith injection electric capacity C0, test loop produces the high frequency arteries and veins that apparent charge amount is Q
Rush electric current, use sine wave source U simultaneouslysThrough resistance R0Produce the interference electric current of different frequency, be simultaneously applied to tested sensor
Input, resistance R0It is 50 Ω；
Step 2: in the case of any given frequency interferences electric current, when tested apparent charge amount Q is 50pC, interference electric current
When peak-to-peak value is 25mA, observe the detection signal that partial discharge detection instrument shows；
Step 3: change sine wave signal source frequency be 50kHz, 500kHz, 1MHz, 2MHz, 5MHz, 10MHz, 15MHz,
20MHz, 25MHz, 30MHz, 35MHz, 40MHz, repeat the above steps；
Conclusion: if the signal that partial discharge detection instrument can detect under the interference current conditions of different frequency has is not less than 2:1's
Signal to noise ratio, then this instrument interference free performance is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610526324.8A CN106199478B (en) | 2016-06-30 | 2016-06-30 | Examination and verification device and method for high-frequency current method partial discharge detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610526324.8A CN106199478B (en) | 2016-06-30 | 2016-06-30 | Examination and verification device and method for high-frequency current method partial discharge detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106199478A true CN106199478A (en) | 2016-12-07 |
| CN106199478B CN106199478B (en) | 2023-03-10 |
Family
ID=57464964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610526324.8A Active CN106199478B (en) | 2016-06-30 | 2016-06-30 | Examination and verification device and method for high-frequency current method partial discharge detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106199478B (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597341A (en) * | 2016-12-12 | 2017-04-26 | 国网北京市电力公司 | Verification apparatus, method and device of UHF (ultra-high-frequency) partial discharge live detection device |
| CN106772178A (en) * | 2016-12-12 | 2017-05-31 | 国网北京市电力公司 | The calibration equipment of high frequency electric live testing apparatus for local discharge, method and device |
| CN107064846A (en) * | 2016-12-12 | 2017-08-18 | 国网北京市电力公司 | The sensitivity detection method and device of live testing apparatus for local discharge |
| CN107462852A (en) * | 2017-06-22 | 2017-12-12 | 广西电网有限责任公司电力科学研究院 | A kind of scaling method of high frequency partial discharge examination instrument parameter |
| CN107561475A (en) * | 2017-10-24 | 2018-01-09 | 广州供电局有限公司 | High Frequency Current Sensor frequency band quantifies method of calibration, system and device |
| CN107589388A (en) * | 2017-09-13 | 2018-01-16 | 中国电力科学研究院 | The method of evaluating performance of high-frequency method shelf depreciation live detection equipment |
| CN107656226A (en) * | 2017-09-05 | 2018-02-02 | 四川大学 | HFCT electrical parameter test devices and method of testing based on transmission coefficient |
| CN107807311A (en) * | 2017-09-26 | 2018-03-16 | 杭州西湖电子研究所 | A kind of capacitive sleeve pipe high frequency partial discharge signal detection device |
| CN107907800A (en) * | 2017-11-14 | 2018-04-13 | 国网山东省电力公司电力科学研究院 | A kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave |
| CN108037428A (en) * | 2018-01-05 | 2018-05-15 | 中国电力科学研究院有限公司 | Program control type integration checking system for high frequency sensors |
| CN108375749A (en) * | 2018-04-02 | 2018-08-07 | 国网安徽省电力有限公司电力科学研究院 | A kind of superfrequency PD meter automated calibration system and method |
| CN108710097A (en) * | 2018-04-11 | 2018-10-26 | 中国电力科学研究院有限公司 | A kind of method and system for synthesizing mixed signal in single transmission path |
| CN110297201A (en) * | 2019-07-02 | 2019-10-01 | 国网四川省电力公司电力科学研究院 | A kind of the transmission characteristic calibration system and method for wideband transient voltage measuring device |
| CN111273211A (en) * | 2020-03-02 | 2020-06-12 | 云南电网有限责任公司昆明供电局 | Checking system and method for GIS partial discharge online monitoring system |
| CN111426924A (en) * | 2020-05-13 | 2020-07-17 | 北京华电智成电气设备有限公司 | High-frequency partial discharge signal mode recognition function verification method and system |
| CN111537935A (en) * | 2020-06-11 | 2020-08-14 | 国网宁夏电力有限公司电力科学研究院 | High-frequency partial discharge anti-interference function verification method and system |
| CN112924917A (en) * | 2020-12-29 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | On-site calibration platform of ultrahigh frequency partial discharge on-line monitoring system |
| CN113311291A (en) * | 2021-05-28 | 2021-08-27 | 国网江苏省电力有限公司无锡供电分公司 | Partial discharge detection sensitivity testing device and method for long-section high-voltage cable |
| CN113740586A (en) * | 2021-08-27 | 2021-12-03 | 北京全路通信信号研究设计院集团有限公司 | Current testing device and method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197272A (en) * | 2013-03-15 | 2013-07-10 | 中国电力科学研究院 | System and method of measuring performance of partial discharge transient state ground voltage detector |
| CN103323807A (en) * | 2013-06-03 | 2013-09-25 | 杭州西湖电子研究所 | Assessment check and magnitude calibration method for ultrahigh-frequency partial-discharging tester |
| CN103472424A (en) * | 2013-08-26 | 2013-12-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for testing performance of different types of partial discharge detector mainframes based on analog voltage signal injection |
| CN103913714A (en) * | 2014-04-09 | 2014-07-09 | 国家电网公司 | Calibration system of partial discharge supersonic detector |
| CN103913681A (en) * | 2014-03-24 | 2014-07-09 | 华北电力大学 | System and method for detecting partial discharge under high-frequency voltage |
| CN104215925A (en) * | 2014-09-09 | 2014-12-17 | 广州供电局有限公司 | High-frequency sensor and sensitivity detecting device and method thereof |
| JP2015021929A (en) * | 2013-07-23 | 2015-02-02 | 日新パルス電子株式会社 | Partial discharge measurement instrument and calibrator for partial discharge measurement instrument |
| CN105223530A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | High frequency partial discharge detector verification system and calibration method thereof |
| CN105301546A (en) * | 2015-12-04 | 2016-02-03 | 国网浙江省电力公司电力科学研究院 | Ultrasonic partial discharge tester verification method and system |
| CN205229440U (en) * | 2015-12-15 | 2016-05-11 | 国网北京市电力公司 | A detecting system for detecting partial discharge detector |
| CN205880182U (en) * | 2016-06-30 | 2017-01-11 | 杭州西湖电子研究所 | Examination calibration equipment based on high frequency current method partial discharge detector |
-
2016
- 2016-06-30 CN CN201610526324.8A patent/CN106199478B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197272A (en) * | 2013-03-15 | 2013-07-10 | 中国电力科学研究院 | System and method of measuring performance of partial discharge transient state ground voltage detector |
| CN103323807A (en) * | 2013-06-03 | 2013-09-25 | 杭州西湖电子研究所 | Assessment check and magnitude calibration method for ultrahigh-frequency partial-discharging tester |
| JP2015021929A (en) * | 2013-07-23 | 2015-02-02 | 日新パルス電子株式会社 | Partial discharge measurement instrument and calibrator for partial discharge measurement instrument |
| CN103472424A (en) * | 2013-08-26 | 2013-12-25 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for testing performance of different types of partial discharge detector mainframes based on analog voltage signal injection |
| CN103913681A (en) * | 2014-03-24 | 2014-07-09 | 华北电力大学 | System and method for detecting partial discharge under high-frequency voltage |
| CN103913714A (en) * | 2014-04-09 | 2014-07-09 | 国家电网公司 | Calibration system of partial discharge supersonic detector |
| CN104215925A (en) * | 2014-09-09 | 2014-12-17 | 广州供电局有限公司 | High-frequency sensor and sensitivity detecting device and method thereof |
| CN105223530A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | High frequency partial discharge detector verification system and calibration method thereof |
| CN105301546A (en) * | 2015-12-04 | 2016-02-03 | 国网浙江省电力公司电力科学研究院 | Ultrasonic partial discharge tester verification method and system |
| CN205229440U (en) * | 2015-12-15 | 2016-05-11 | 国网北京市电力公司 | A detecting system for detecting partial discharge detector |
| CN205880182U (en) * | 2016-06-30 | 2017-01-11 | 杭州西湖电子研究所 | Examination calibration equipment based on high frequency current method partial discharge detector |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772178A (en) * | 2016-12-12 | 2017-05-31 | 国网北京市电力公司 | The calibration equipment of high frequency electric live testing apparatus for local discharge, method and device |
| CN107064846A (en) * | 2016-12-12 | 2017-08-18 | 国网北京市电力公司 | The sensitivity detection method and device of live testing apparatus for local discharge |
| CN106597341A (en) * | 2016-12-12 | 2017-04-26 | 国网北京市电力公司 | Verification apparatus, method and device of UHF (ultra-high-frequency) partial discharge live detection device |
| CN107462852A (en) * | 2017-06-22 | 2017-12-12 | 广西电网有限责任公司电力科学研究院 | A kind of scaling method of high frequency partial discharge examination instrument parameter |
| CN107656226B (en) * | 2017-09-05 | 2019-09-24 | 四川大学 | HFCT electrical parameter test device and test method based on transmission coefficient |
| CN107656226A (en) * | 2017-09-05 | 2018-02-02 | 四川大学 | HFCT electrical parameter test devices and method of testing based on transmission coefficient |
| CN107589388A (en) * | 2017-09-13 | 2018-01-16 | 中国电力科学研究院 | The method of evaluating performance of high-frequency method shelf depreciation live detection equipment |
| CN107807311A (en) * | 2017-09-26 | 2018-03-16 | 杭州西湖电子研究所 | A kind of capacitive sleeve pipe high frequency partial discharge signal detection device |
| CN107561475A (en) * | 2017-10-24 | 2018-01-09 | 广州供电局有限公司 | High Frequency Current Sensor frequency band quantifies method of calibration, system and device |
| CN107907800A (en) * | 2017-11-14 | 2018-04-13 | 国网山东省电力公司电力科学研究院 | A kind of partial discharge detecting system and method for transformer gap leakage electromagnetic wave |
| CN108037428A (en) * | 2018-01-05 | 2018-05-15 | 中国电力科学研究院有限公司 | Program control type integration checking system for high frequency sensors |
| CN108375749A (en) * | 2018-04-02 | 2018-08-07 | 国网安徽省电力有限公司电力科学研究院 | A kind of superfrequency PD meter automated calibration system and method |
| CN108710097A (en) * | 2018-04-11 | 2018-10-26 | 中国电力科学研究院有限公司 | A kind of method and system for synthesizing mixed signal in single transmission path |
| CN110297201A (en) * | 2019-07-02 | 2019-10-01 | 国网四川省电力公司电力科学研究院 | A kind of the transmission characteristic calibration system and method for wideband transient voltage measuring device |
| CN111273211A (en) * | 2020-03-02 | 2020-06-12 | 云南电网有限责任公司昆明供电局 | Checking system and method for GIS partial discharge online monitoring system |
| CN111273211B (en) * | 2020-03-02 | 2022-06-17 | 云南电网有限责任公司昆明供电局 | Checking system and method for GIS partial discharge online monitoring system |
| CN111426924A (en) * | 2020-05-13 | 2020-07-17 | 北京华电智成电气设备有限公司 | High-frequency partial discharge signal mode recognition function verification method and system |
| CN111537935A (en) * | 2020-06-11 | 2020-08-14 | 国网宁夏电力有限公司电力科学研究院 | High-frequency partial discharge anti-interference function verification method and system |
| CN112924917A (en) * | 2020-12-29 | 2021-06-08 | 广东电网有限责任公司电力科学研究院 | On-site calibration platform of ultrahigh frequency partial discharge on-line monitoring system |
| CN113311291A (en) * | 2021-05-28 | 2021-08-27 | 国网江苏省电力有限公司无锡供电分公司 | Partial discharge detection sensitivity testing device and method for long-section high-voltage cable |
| CN113740586A (en) * | 2021-08-27 | 2021-12-03 | 北京全路通信信号研究设计院集团有限公司 | Current testing device and method |
| CN113740586B (en) * | 2021-08-27 | 2024-01-19 | 北京全路通信信号研究设计院集团有限公司 | Current testing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106199478B (en) | 2023-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106199478A (en) | The examination calibration equipment of a kind of high frequency electric method Partial discharge detector and method | |
| CN205880182U (en) | Examination calibration equipment based on high frequency current method partial discharge detector | |
| CN103954890B (en) | DC partial discharge detection device and method for converter transformer | |
| CN106990340B (en) | Partial discharge monitoring system and method | |
| CN101871975B (en) | System and method for testing cable transfer impedance time domain | |
| CN206321749U (en) | A kind of shelf depreciation high frequency electric detection means | |
| CN102650685B (en) | Method for assessing technical parameters of TEV (Transient Earth Voltage) partial discharge testing instruments for power systems | |
| CN105223530B (en) | High-frequency partial discharge detector calibration system and calibration method thereof | |
| CN105954698A (en) | Examination and verification device for noncontact ultrasonic method partial discharge detector and examination and verification method thereof | |
| CN203025281U (en) | Transformer abnormal vibration test device | |
| CN107462852A (en) | A kind of scaling method of high frequency partial discharge examination instrument parameter | |
| CN108548962A (en) | A kind of grounded screen alternating current and direct current and impulse resistance integrated test system and method | |
| CN104991210A (en) | Evaluation method for partial discharge detection device, and calibration device | |
| CN108957192A (en) | A kind of electromagnetic interference diagnosing system and method | |
| CN208172228U (en) | The system that a kind of pair of high-frequency method local discharge sensor carries out anti-interference detection | |
| CN107656226B (en) | HFCT electrical parameter test device and test method based on transmission coefficient | |
| CN109085474A (en) | A kind of method and system of detection 35kV and following cable oscillation wave local discharge measuring instrument performance | |
| CN208969228U (en) | A kind of Magnetic Sensor static and dynamic performance caliberating device charging straight wire surrounding magnetic field | |
| CN207908626U (en) | A kind of simulation high frequency Partial discharge signal generating means | |
| CN107121657A (en) | A kind of integrated live testing apparatus for local discharge check system and method | |
| CN203759193U (en) | Direct-current partial discharge detection device of converter transformer | |
| CN104678339B (en) | Calibration device, system and method for probe type microwave voltage measurement system | |
| CN109407026B (en) | Evaluation device and method for ultrahigh frequency partial discharge instrument | |
| US3441842A (en) | Line fault detection method and apparatus utilizing a test signal having a nonsinusoidal waveform preferably with at least one pip per cycle | |
| CN111751676B (en) | Detection system and method capable of distinguishing partial discharge signals of transformer and sleeve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |