CN110907879B - Calibration method of interturn voltage-withstanding tester - Google Patents
Calibration method of interturn voltage-withstanding tester Download PDFInfo
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- CN110907879B CN110907879B CN201911179516.6A CN201911179516A CN110907879B CN 110907879 B CN110907879 B CN 110907879B CN 201911179516 A CN201911179516 A CN 201911179516A CN 110907879 B CN110907879 B CN 110907879B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
The invention discloses a calibration method of an interturn voltage resistance tester, which comprises the following steps: acquiring external form condition information of a turn-to-turn voltage tester, wherein the external form condition information of the turn-to-turn voltage tester comprises placing inclination angle data of the turn-to-turn voltage tester, panel pointer position data of the turn-to-turn voltage tester and electromagnetic interference data of the turn-to-turn voltage tester, and performing external observation and monitoring operation on the external form condition information to obtain a real-time interception calibration signal or a passing calibration signal; the invention combines the external form condition inspection with the internal measurement condition monitoring, and carries out the superposed interference judgment on the whole condition before calibration and the analysis result after calibration through the hierarchical weighted assignment processing and the corrected formula analysis process, thereby greatly improving the real effectiveness of the calibration result and avoiding the adverse effect of the external interference on the calibration process and the calibration result.
Description
Technical Field
The invention relates to the technical field of instrument calibration, in particular to a calibration method of an interturn voltage resistance tester.
Background
The interturn voltage-withstanding tester is a kind of tester for testing the interturn insulation characteristic of the coil, and usually adopts the working principle of voltage impulse comparison method to compare the figure consistency of the test curve and the standard curve, so as to judge whether the test piece has the faults of short circuit, discharge, etc.
The calibration process of the conventional turn-to-turn withstand voltage tester only directly performs integral evaluation according to manual appearance inspection and power-on inspection, and performs subsequent calibration work according to the integral evaluation, and is difficult to combine external form condition inspection and internal measurement condition inspection, and performs superposed interference judgment on the integral condition before calibration and the analysis result after calibration according to a hierarchical processing mode so as to prevent external interference from generating adverse effects on the calibration process and the calibration result;
in order to solve the above-mentioned drawbacks, a technical solution is now provided.
Disclosure of Invention
The invention aims to provide a calibration method of an interturn voltage tester, which combines external form condition inspection and internal measurement condition monitoring, and carries out superposed interference judgment on the whole condition before calibration and the analysis result after calibration through hierarchical weighted assignment processing and a corrected formula analysis process, thereby greatly improving the real effectiveness of the calibration result and preventing external interference from generating adverse effects on the calibration process and the calibration result.
The technical problems to be solved by the invention are as follows:
how to solve the calibration process of the existing turn-to-turn voltage endurance tester through an effective mode, the whole evaluation is only directly carried out according to manual appearance inspection and electrification inspection, the subsequent calibration work is carried out according to the whole evaluation process, the external form condition inspection and the internal measurement condition inspection are difficult to combine, and the superposed interference judgment is carried out on the whole condition before the calibration and the analysis result after the calibration according to the hierarchical processing mode, so that the problem that the calibration process and the calibration result are adversely affected by external interference is avoided.
The purpose of the invention can be realized by the following technical scheme:
a calibration method of an interturn voltage tester comprises the following steps:
acquiring external form condition information of the interturn voltage tester, and carrying out external observation and supervision operation on the external form condition information to obtain a real-time interception calibration signal or a passing calibration signal;
step two, Ka: after receiving real-time interception calibration signal, then control the alarm and send the warning according to this, after receiving real-time calibration signal that passes through, then control one-level traffic pilot lamp and constantly twinkle in view of the above to carry out one-level calibration operation to it, specific process is as follows:
l1, electrifying the calibrated instrument and the standard device together for preheating for 45 minutes, selecting a calibrated load, and electrically connecting the calibrated load with the instrument to be tested, the high-frequency high-voltage attenuator and the oscilloscope;
l2, adjusting the calibrated channel of the tested instrument and setting the calibrated channel to a calibrated peak voltage amplitude value; adjusting the high-frequency high-voltage attenuator, and setting the high-frequency high-voltage attenuator to a calibrated attenuation ratio according to a nominal value of the high-frequency high-voltage attenuator; adjusting the gain and the offset of the oscilloscope on the set Y axis, and ensuring that the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is 20-40 percent;
l3, starting voltage output of the tested instrument, adjusting the gain of the oscilloscope on the set X axis, ensuring that the oscilloscope screen contains a complete first wave peak, and obtaining and storing a stable test image after triggering;
l4 measuring the peak voltage amplitude V of the first peak by using X-axis cursor tool, and calculating according to the formula Δ Vp＝V0V, determining the error Δ V of the peak voltage amplitudepAccording to a formula
Determining the relative indication error gamma v of the peak voltage amplitudep，V0A setting value representing the calibrated instrument;
l5, adjusting the calibrated channel of the tested instrument and the calibration point thereof, repeating the calibration process and taking the average value thereof, and generating a peak voltage calibration passing signal when the average value is within the rated error range, otherwise not generating any signal;
step two Kb, after receiving real-time interception calibration signal, then control the attention device in view of the above and send out the police dispatch newspaper, after receiving real-time passing calibration signal, then control the second grade traffic pilot lamp in view of the above and constantly blink to carry out the second grade calibration operation to it, specific process is as follows:
h1, after selecting the set peak voltage amplitude calibration point, adjusting the calibrated channel of the measured instrument, and setting the calibrated channel to the calibrated peak voltage amplitude value; adjusting the high-frequency high-voltage attenuator, and setting the high-frequency high-voltage attenuator to a calibrated attenuation ratio according to a nominal value of the high-frequency high-voltage attenuator; adjusting the gain and the offset of the oscilloscope on the set Y axis, and ensuring that the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is 20-40 percent;
h2, using a Y-axis cursor tool, the 10% amplitude rise time t of the first peak was measured10And 90% amplitude rise time t90And according to the formula t ═ t90-t10The rise time t of the surge voltage is determined and t is obtained according to the formula0T, determining the error Δ t of the rise time of the surge voltage, and calculating the value according to the formula
Determining the relative indication error gamma t, t of the rise time of the surge voltage0The nominal value of the instrument to be calibrated is represented, and when the three are all located in respective rated error ranges, an impulse voltage calibration passing signal is generated according to the nominal value, otherwise, no signal is generated;
step two, Kc, after receiving the real-time passing calibration signal, acquiring the internal measurement condition information of the interturn voltage tester, and carrying out internal calibration analysis operation on the internal measurement condition information to obtain a real-time internal fluctuation calibration signal or an internal stability calibration signal;
step three, after receiving a real-time internal fluctuation calibration signal, editing an 'internal condition to-be-overhauled' text according to the text and sending the text to a display screen, immediately acquiring an impulse voltage calibration passing signal and a peak voltage calibration passing signal after receiving the real-time internal fluctuation calibration signal, editing a 'comprehensive condition stable' text according to the text and sending the text to the display screen when both the two signals are acquired, and editing a corresponding 'impulse voltage fluctuation to-be-overhauled or peak voltage fluctuation to-be-overhauled' text according to the text and sending the text to the display screen when both the two signals are acquired, wherein the display screen also displays a calibration certificate, a laboratory name and address, a unique identifier of the certificate or report, a name and address of a client, a description and identifier of an object to be calibrated, a calibration date, a technical specification name and a code number according to the calibration, The measurement standard and validity statement of the calibration standard, the description of the calibration environment, the certificate to be calibrated and the name of the issuer of the certificate are specific information, and the re-calibration time interval is one year.
Further, the external form condition information of the inter-turn voltage tester includes placement inclination angle data of the inter-turn voltage tester, panel pointer position data of the inter-turn voltage tester, and electromagnetic interference data of the inter-turn voltage tester, and the three can be obtained according to equipment or modes such as a sensor, an image recognition technology, an electromagnetic interference detector and the like.
Further, the specific steps of the external observation and monitoring operation are as follows:
the method comprises the following steps: acquiring external form condition information of the interturn voltage tester in real time, and respectively marking the placing inclination angle data, the panel pointer position data and the electromagnetic interference data as Q, W and E;
step two: when the placing inclination angle data Q of the turn-to-turn voltage tester is larger than the maximum value of the preset range Q, is positioned in the preset range Q and is smaller than the minimum value of the preset range Q, sequentially giving calibration positive values A1, A2 and A3 to the placing inclination angle data Q of the turn-to-turn voltage tester, wherein A1 is larger than A2 and is larger than A3; when the panel pointer position data W of the interturn voltage tester is positioned on the left side or the right side of the zero value and is just opposite to the zero value, sequentially giving calibration positive values S1 and S2 to the panel pointer position data W of the interturn voltage tester, wherein S1 is larger than S2; when the electromagnetic interference data E of the interturn voltage-withstanding tester is larger than a preset value E and is smaller than or equal to the preset value E, giving calibration positive values D1 and D2 to the electromagnetic interference data E of the interturn voltage-withstanding tester in sequence, wherein D1 is larger than D2;
step three: the method comprises the steps of firstly respectively giving weight coefficients a, s and d to placing inclination angle data Q of an interturn voltage tester, panel pointer position data W of the interturn voltage tester and electromagnetic interference data E of the interturn voltage tester, wherein a is smaller than d and a + s + d is 5.3285, then obtaining an external index coefficient R of the real-time interturn voltage tester according to a formula R which is Q + a + W + E + d, finally comparing the external index coefficient R with a preset value R, generating an interception calibration signal when the external index coefficient R of the interturn voltage tester is larger than the preset value R, and otherwise generating a passing calibration signal.
Furthermore, the internal measurement condition information of the inter-turn voltage tester includes working noise data of the inter-turn voltage tester, a working temperature level of the inter-turn voltage tester and a working voltage frequency quantity of the inter-turn voltage tester, the working temperature level of the inter-turn voltage tester represents a difference between an ambient temperature and a self working temperature, and then the difference is multiplied by a temperature variation per minute, the working voltage frequency quantity of the inter-turn voltage tester represents a ratio of the working voltage frequency variation of the inter-turn voltage tester to a rated voltage frequency, and the three can be obtained according to apparatuses or modes such as a decibel meter, a sensor and the like.
Further, the specific steps of the internal calibration analysis operation are as follows:
the method comprises the following steps: acquiring internal measurement condition information of the interturn voltage tester in real time, and respectively calibrating working noise data, a working temperature level and a working voltage frequency quantity as T, Y and U;
step two: according to the formula
Obtaining real-time internal index coefficients P of the interturn voltage tester, wherein z, Y and u are correction factors, z is smaller than Y, z + Y + u is 5.6822, k and h are weighing coefficients, when the difference between the ambient temperature in the working temperature level Y of the interturn voltage tester and the self working temperature is within the preset range, k is 2.55, otherwise k is 1.28, when the working voltage frequency variation in the working voltage frequency quantity of the interturn voltage tester is within the preset range, h is 4.38, otherwise h is 2.91, then the internal index coefficient P of the interturn voltage tester is compared with the preset value P, when the internal index coefficient P of the interturn voltage tester is larger than the preset value P, an internal fluctuation calibration signal is generated according to the internal fluctuation, otherwise, an internal stability calibration signal is generated.
The invention has the beneficial effects that:
according to the method, external form condition information of a turn-to-turn voltage tester is acquired, and external observation and monitoring operation is carried out on the turn-to-turn voltage tester, namely, placing inclination angle data, panel pointer position data and electromagnetic interference data of the turn-to-turn voltage tester are calibrated, assigned, weighted and compared in a preset mode, so that a real-time interception calibration signal or a passing calibration signal is obtained;
when the real-time passing calibration signal is received, the first-level traffic indicator lamp is controlled to continuously flash according to the real-time passing calibration signal, and the first-level calibration operation is carried out on the first-level traffic indicator lamp, the calibrated instrument and the standard device are electrified and preheated together, a calibrated load is selected and electrically connected with the tested instrument, the high-frequency high-voltage attenuator and the oscilloscope, the calibrated channel of the tested instrument is adjusted, the high-frequency high-voltage attenuator is adjusted, the Y-axis gain and the offset of the oscilloscope are adjusted, and the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is ensured to be 20-40 percent, then the X-axis gain of the oscilloscope is adjusted, ensuring that the oscilloscope screen contains a complete first wave crest, obtaining and storing a stable test image after triggering, and finally generating a peak voltage calibration passing signal or not generating any signal through public calculation and mean value comparison;
after receiving a real-time passing calibration signal, controlling a secondary pass indicator lamp to continuously flash according to the passing calibration signal, and performing secondary calibration operation on the passing indicator lamp, namely selecting a peak voltage amplitude calibration point, adjusting a calibrated channel of a tested instrument, adjusting a high-frequency high-voltage attenuator and adjusting Y-axis gain and offset of an oscilloscope, ensuring that the proportion of the amplitude height of a first peak of a test waveform to the height of a screen of the oscilloscope is 20-40%, and then measuring 10% amplitude rise time t of the first peak according to a Y-axis cursor tool10And 90% amplitude rise time t90Finally, through formula calculation and mean value comparison, generating an impulse voltage calibration passing signal or generating no signal;
after receiving the real-time passing calibration signal, acquiring the internal measurement condition information of the turn-to-turn voltage tester, and carrying out internal calibration analysis operation on the internal measurement condition information, namely calibrating, correcting formula analysis and preset comparison on working noise data, a working temperature level and a working voltage frequency quantity of the turn-to-turn voltage tester to obtain a real-time internal fluctuation calibration signal or an internal stability calibration signal;
after receiving a real-time internal fluctuation calibration signal, editing an 'internal condition to-be-overhauled' text according to the text and sending the text to a display screen, immediately acquiring an impulse voltage calibration passing signal and a peak voltage calibration passing signal after receiving the real-time internal stable calibration signal, editing a 'comprehensive condition stable' text according to the text and sending the text to the display screen when both the two signals are acquired, and editing a corresponding 'impulse voltage fluctuation to-be-overhauled or peak voltage fluctuation to-be-overhauled' text according to the text and sending the text to the display screen when both signals are acquired, so that external form condition inspection and internal measurement condition monitoring are combined, and the overall condition before calibration and the analysis result after calibration are subjected to superimposed interference judgment through hierarchical weighted assignment processing and modified formula analysis processes, thereby greatly improving the real effectiveness of the calibration result, so as to avoid the bad influence of the external interference on the calibration process and the calibration result.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings;
FIG. 1 is a schematic diagram of the calibration circuit according to the present invention;
FIG. 2 is a schematic diagram of an oscilloscope screen display according to the present invention.
Detailed Description
As shown in fig. 1-2, a calibration method for an interturn voltage tester includes the following steps:
the method comprises the following steps of firstly, acquiring external form condition information of a turn-to-turn voltage tester, wherein the external form condition information of the turn-to-turn voltage tester comprises placing inclination angle data of the turn-to-turn voltage tester, panel pointer position data of the turn-to-turn voltage tester and electromagnetic interference data of the turn-to-turn voltage tester, and the three can be obtained according to equipment or modes such as a sensor, an image recognition technology, an electromagnetic interference detector and the like, and carrying out external observation and monitoring operation on the equipment or the modes, and the specific steps are as follows:
the method comprises the following steps: acquiring external form condition information of the interturn voltage tester in real time, and respectively marking the placing inclination angle data, the panel pointer position data and the electromagnetic interference data as Q, W and E;
step two: when the placing inclination angle data Q of the turn-to-turn voltage tester is larger than the maximum value of the preset range Q, is positioned in the preset range Q and is smaller than the minimum value of the preset range Q, sequentially giving calibration positive values A1, A2 and A3 to the placing inclination angle data Q of the turn-to-turn voltage tester, wherein A1 is larger than A2 and is larger than A3; when the panel pointer position data W of the interturn voltage tester is positioned on the left side or the right side of the zero value and is just opposite to the zero value, sequentially giving calibration positive values S1 and S2 to the panel pointer position data W of the interturn voltage tester, wherein S1 is larger than S2; when the electromagnetic interference data E of the interturn voltage-withstanding tester is larger than a preset value E and is smaller than or equal to the preset value E, giving calibration positive values D1 and D2 to the electromagnetic interference data E of the interturn voltage-withstanding tester in sequence, wherein D1 is larger than D2;
step three: firstly, respectively giving weight coefficients a, s and d to placing inclination angle data Q of an interturn voltage tester, panel pointer position data W of the interturn voltage tester and electromagnetic interference data E of the interturn voltage tester, wherein a is smaller than d and a + s + d is 5.3285, then obtaining an external index coefficient R of the real-time interturn voltage tester according to a formula R which is Q + a + W + s + E + d, finally comparing the external index coefficient R with a preset value R, generating an interception calibration signal when the external index coefficient R of the interturn voltage tester is larger than the preset value R, and otherwise generating a passing calibration signal;
to obtain a real-time interception calibration signal or a passing calibration signal;
step two, Ka: after receiving real-time interception calibration signal, then control the alarm and send the warning according to this, after receiving real-time calibration signal that passes through, then control one-level traffic pilot lamp and constantly twinkle in view of the above to carry out one-level calibration operation to it, specific process is as follows:
l1, electrifying the calibrated instrument and the standard device together for preheating for 45 minutes, selecting a calibrated load, and electrically connecting the calibrated load with the instrument to be tested, the high-frequency high-voltage attenuator and the oscilloscope;
l2, adjusting the calibrated channel of the tested instrument and setting the calibrated channel to a calibrated peak voltage amplitude value; adjusting the high-frequency high-voltage attenuator, and setting the high-frequency high-voltage attenuator to a calibrated attenuation ratio according to a nominal value of the high-frequency high-voltage attenuator; adjusting the gain and the offset of the oscilloscope on the set Y axis, and ensuring that the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is 20-40 percent;
l3, starting voltage output of the tested instrument, adjusting the gain of the oscilloscope on the set X axis, ensuring that the oscilloscope screen contains a complete first wave peak, and obtaining and storing a stable test image after triggering;
l4 measuring the peak voltage amplitude V of the first peak by using X-axis cursor tool, and calculating according to the formula Δ Vp＝V0V, determining the error Δ V of the peak voltage amplitudepAccording to a formula
Determining the relative indication error gamma v of the peak voltage amplitudep，V0A setting value representing the calibrated instrument;
l5, adjusting the calibrated channel of the tested instrument and the calibration point thereof, repeating the calibration process and taking the average value thereof, and generating a peak voltage calibration passing signal when the average value is within the rated error range, otherwise not generating any signal;
step two Kb, after receiving real-time interception calibration signal, then control the attention device in view of the above and send out the police dispatch newspaper, after receiving real-time passing calibration signal, then control the second grade traffic pilot lamp in view of the above and constantly blink to carry out the second grade calibration operation to it, specific process is as follows:
h1, after selecting the set peak voltage amplitude calibration point, adjusting the calibrated channel of the measured instrument, and setting the calibrated channel to the calibrated peak voltage amplitude value; adjusting the high-frequency high-voltage attenuator, and setting the high-frequency high-voltage attenuator to a calibrated attenuation ratio according to a nominal value of the high-frequency high-voltage attenuator; adjusting the gain and the offset of the oscilloscope on the set Y axis, and ensuring that the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is 20-40 percent;
h2, using a Y-axis cursor tool, the 10% amplitude rise time t of the first peak was measured10And 90% amplitude rise time t90And according to the formula t ═ t90-t10The rise time t of the surge voltage is determined and t is obtained according to the formula0T, determining the impactThe indication error delta t of the voltage rise time according to the formula
Determining the relative indication error gamma t, t of the rise time of the surge voltage0The nominal value of the instrument to be calibrated is represented, and when the three are all located in respective rated error ranges, an impulse voltage calibration passing signal is generated according to the nominal value, otherwise, no signal is generated;
step two Kc, after receiving the real-time passing calibration signal, collecting the internal measurement condition information of the inter-turn voltage tester, wherein the internal measurement condition information of the inter-turn voltage tester comprises working noise data of the inter-turn voltage tester, a working temperature level of the inter-turn voltage tester and a working voltage frequency quantity of the inter-turn voltage tester, the working temperature level of the inter-turn voltage tester represents the difference between the environmental temperature and the self working temperature, and then multiplying the difference by the temperature variation per minute, the working voltage frequency quantity of the inter-turn voltage tester represents the ratio between the working voltage frequency variation of the inter-turn voltage tester and the rated voltage frequency, and the three can be obtained according to instruments or modes such as a decibel meter, a sensor and the like, and carrying out internal calibration analysis operation on the three, and the specific steps are as follows:
the method comprises the following steps: acquiring internal measurement condition information of the interturn voltage tester in real time, and respectively calibrating working noise data, a working temperature level and a working voltage frequency quantity as T, Y and U;
step two: according to the formula
Obtaining real-time internal index coefficients P of the interturn voltage tester, wherein z, Y and u are correction factors, z is smaller than Y, z + Y + u is 5.6822, k and h are measurement coefficients, when the difference between the environment temperature in the working temperature level Y of the interturn voltage tester and the self working temperature is within the preset range, k is 2.55, otherwise k is 1.28, when the working voltage frequency variation in the working voltage frequency quantity of the interturn voltage tester is within the preset range, h isTaking 4.38, otherwise, taking 2.91 for h, then comparing an internal index coefficient P of the inter-turn voltage tester with a preset value P, and generating an internal fluctuation calibration signal according to the internal index coefficient P when the internal index coefficient P of the inter-turn voltage tester is greater than the preset value P, otherwise, generating an internal stability calibration signal according to the internal fluctuation calibration signal;
to obtain a real-time internal fluctuation calibration signal or an internal stable calibration signal;
step three, after receiving a real-time internal fluctuation calibration signal, editing an 'internal condition to-be-overhauled' text according to the text and sending the text to a display screen, immediately acquiring an impulse voltage calibration passing signal and a peak voltage calibration passing signal after receiving the real-time internal fluctuation calibration signal, editing a 'comprehensive condition stable' text according to the text and sending the text to the display screen when both the two signals are acquired, and editing a corresponding 'impulse voltage fluctuation to-be-overhauled or peak voltage fluctuation to-be-overhauled' text according to the text and sending the text to the display screen when both the two signals are acquired, wherein the display screen also displays a calibration certificate, a laboratory name and address, a unique identifier of the certificate or report, a name and address of a client, a description and identifier of an object to be calibrated, a calibration date, a technical specification name and a code number according to the calibration, The measurement standard and validity statement of the calibration standard, the description of the calibration environment, the certificate to be calibrated and the name of the issuer of the certificate are specific information, and the re-calibration time interval is one year.
A calibration method of a turn-to-turn voltage resistance tester is characterized in that in the working process, external form condition information of the turn-to-turn voltage resistance tester is collected, the external form condition information of the turn-to-turn voltage resistance tester comprises placing inclination angle data of the turn-to-turn voltage resistance tester, panel pointer position data of the turn-to-turn voltage resistance tester and electromagnetic interference data of the turn-to-turn voltage resistance tester, and external observation and monitoring operation is carried out on the external form condition information, namely the placing inclination angle data of the turn-to-turn voltage resistance tester, the panel pointer position data and the electromagnetic interference data are calibrated, assigned with weight and compared in a preset mode, so that real-time intercepting calibration signals or passing through the calibration signals are obtained;
after receiving a real-time interception calibration signal, controlling an alarm to give an alarm according to the interception calibration signal, after receiving a real-time passing calibration signal, controlling a first-stage pass indicator lamp to continuously flash according to the received interception calibration signal, carrying out first-stage calibration operation on the passing calibration signal, namely electrifying and preheating a calibrated instrument and a standard device together, selecting a calibrated load, electrically connecting the calibrated load with a tested instrument, a high-frequency high-voltage attenuator and an oscilloscope, adjusting a calibrated channel of the tested instrument, adjusting the high-frequency high-voltage attenuator and adjusting Y-axis gain and offset of the oscilloscope, ensuring that the ratio of the first peak amplitude height of a test waveform to the height of the oscilloscope screen is 20-40 percent, then adjusting the X-axis gain of the oscilloscope, ensuring that the oscilloscope screen contains a complete first peak, triggering, obtaining and storing a stable test image, and finally comparing the stable test image with a mean value through public display calculation, generating a peak voltage calibration pass signal or generating no signal;
when a real-time interception calibration signal is received, the alarm is controlled to give an alarm, when a real-time passing calibration signal is received, the secondary pass indicator lamp is controlled to continuously flash, secondary calibration operation is carried out on the secondary pass indicator lamp, namely, a peak voltage amplitude calibration point is selected, a calibrated channel of the tested instrument is adjusted, a high-frequency high-voltage attenuator is adjusted, Y-axis gain and offset of the oscilloscope are adjusted, the proportion of the amplitude height of a first peak of a test waveform to the height of the screen of the oscilloscope is ensured to be 20% -40%, and then 10% amplitude rise time t of the first peak is measured according to a Y-axis cursor tool10And 90% amplitude rise time t90Finally, through formula calculation and mean value comparison, generating an impulse voltage calibration passing signal or generating no signal;
when receiving the real-time passing calibration signal, collecting the internal measurement condition information of the inter-turn voltage tester, wherein the internal measurement condition information of the inter-turn voltage tester comprises the working noise data of the inter-turn voltage tester, the working temperature level of the inter-turn voltage tester and the working voltage frequency quantity of the inter-turn voltage tester, the working temperature level of the turn-to-turn voltage tester represents the difference between the ambient temperature and the working temperature of the tester, and then the difference is multiplied by the temperature variation per minute, the working voltage frequency quantity of the turn-to-turn voltage-resisting tester represents the ratio of the working voltage frequency variation quantity of the turn-to-turn voltage-resisting tester to the rated voltage frequency, and the internal calibration analysis operation is carried out on the working voltage frequency variation quantity, the method comprises the steps that working noise data, a working temperature level and a working voltage frequency quantity of a turn-to-turn voltage tester are calibrated, corrected, analyzed in a formula and compared in a preset mode, so that a real-time internal fluctuation calibration signal or an internal stability calibration signal is obtained;
after receiving a real-time internal fluctuation calibration signal, editing an 'internal condition to-be-overhauled' text according to the text and sending the text to a display screen, immediately acquiring an impulse voltage calibration passing signal and a peak voltage calibration passing signal after receiving the real-time internal stable calibration signal, editing a 'comprehensive condition stable' text according to the text and sending the text to the display screen when both the two signals are acquired, and editing a corresponding 'impulse voltage fluctuation to-be-overhauled or peak voltage fluctuation to-be-overhauled' text according to the text and sending the text to the display screen when both signals are acquired, so that external form condition inspection and internal measurement condition monitoring are combined, and the overall condition before calibration and the analysis result after calibration are subjected to superimposed interference judgment through hierarchical weighted assignment processing and modified formula analysis processes, thereby greatly improving the real effectiveness of the calibration result, so as to avoid the bad influence of the external interference on the calibration process and the calibration result.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
Claims (5)
1. A calibration method of an interturn voltage tester is characterized by comprising the following steps:
acquiring external form condition information of the interturn voltage tester, and carrying out external observation and supervision operation on the external form condition information to obtain a real-time interception calibration signal or a passing calibration signal;
step two, Ka: after receiving real-time interception calibration signal, then control the alarm and send the warning according to this, after receiving real-time calibration signal that passes through, then control one-level traffic pilot lamp and constantly twinkle in view of the above to carry out one-level calibration operation to it, specific process is as follows:
l1, electrifying the calibrated instrument and the standard device together for preheating for 45 minutes, selecting a calibrated load, and electrically connecting the calibrated load with the instrument to be tested, the high-frequency high-voltage attenuator and the oscilloscope;
l2, adjusting the calibrated channel of the tested instrument and setting the calibrated channel to a calibrated peak voltage amplitude value; adjusting the high-frequency high-voltage attenuator, and setting the high-frequency high-voltage attenuator to a calibrated attenuation ratio according to a nominal value of the high-frequency high-voltage attenuator; adjusting the gain and the offset of the oscilloscope on the set Y axis, and ensuring that the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is 20-40 percent;
l3, starting voltage output of the tested instrument, adjusting the gain of the oscilloscope on the set X axis, ensuring that the oscilloscope screen contains a complete first wave peak, and obtaining and storing a stable test image after triggering;
l4 measuring the peak voltage amplitude V of the first peak by using X-axis cursor tool, and calculating according to the formula Δ Vp＝V0V, determining the error Δ V of the peak voltage amplitudepAccording to a formula
Determining the relative indication error gamma v of the peak voltage amplitudep，V0A setting value representing the calibrated instrument;
l5, adjusting the calibrated channel of the tested instrument and the calibration point thereof, repeating the calibration process and taking the average value thereof, and generating a peak voltage calibration passing signal when the average value is within the rated error range, otherwise not generating any signal;
the method comprises the steps that an instrument to be calibrated and a standard device are electrified together for preheating, a calibrated load is selected and is electrically connected with the instrument to be tested, a high-frequency high-voltage attenuator and an oscilloscope, a channel to be calibrated of the instrument to be tested is adjusted, the high-frequency high-voltage attenuator is adjusted, Y-axis gain and offset of the oscilloscope are adjusted, the proportion of the amplitude height of a first peak of a test waveform to the height of a screen of the oscilloscope is 20% -40%, then X-axis gain of the oscilloscope is adjusted, the fact that the screen of the oscilloscope contains a complete first peak is ensured, a stable test image is obtained and stored after triggering, and finally a peak voltage calibration passing signal or no signal is generated through public calculation and mean value comparison;
step two Kb, after receiving real-time interception calibration signal, then control the attention device in view of the above and send out the police dispatch newspaper, after receiving real-time passing calibration signal, then control the second grade traffic pilot lamp in view of the above and constantly blink to carry out the second grade calibration operation to it, specific process is as follows:
h1, after selecting the set peak voltage amplitude calibration point, adjusting the calibrated channel of the measured instrument, and setting the calibrated channel to the calibrated peak voltage amplitude value; adjusting the high-frequency high-voltage attenuator, and setting the high-frequency high-voltage attenuator to a calibrated attenuation ratio according to a nominal value of the high-frequency high-voltage attenuator; adjusting the gain and the offset of the oscilloscope on the set Y axis, and ensuring that the ratio of the amplitude height of the first peak of the test waveform to the height of the screen of the oscilloscope is 20-40 percent;
h2, using a Y-axis cursor tool, the 10% amplitude rise time t of the first peak was measured10And 90% amplitude rise time t90And according to the formula t ═ t90-t10The rise time t of the surge voltage is determined and t is obtained according to the formula0T, determining the error Δ t of the rise time of the surge voltage, and calculating the value according to the formula
Determining the relative indication error gamma t, t of the rise time of the surge voltage0The nominal value of the instrument to be calibrated is represented, and when the three are all located in respective rated error ranges, an impulse voltage calibration passing signal is generated according to the nominal value, otherwise, no signal is generated;
selecting a peak voltage amplitude calibration point, adjusting a calibrated channel of a tested instrument, adjusting a high-frequency high-voltage attenuator and adjusting Y-axis gain and offset of an oscilloscope, and ensuring a first test waveformThe ratio of the amplitude height of each peak to the height of the screen of the oscilloscope is 20-40%, and then the 10% amplitude rise time t of the first peak is measured according to a Y-axis cursor tool10And 90% amplitude rise time t90Finally, through formula calculation and mean value comparison, generating an impulse voltage calibration passing signal or generating no signal;
step two, Kc, after receiving the real-time passing calibration signal, acquiring the internal measurement condition information of the interturn voltage tester, and carrying out internal calibration analysis operation on the internal measurement condition information to obtain a real-time internal fluctuation calibration signal or an internal stability calibration signal;
and step three, editing the text of 'internal condition to be overhauled' according to the text after receiving the real-time internal fluctuation calibration signal, and sending the text to the display screen, immediately acquiring an impulse voltage calibration passing signal and a peak voltage calibration passing signal after receiving the real-time internal stability calibration signal, editing the text of 'comprehensive condition stability' according to the text when both the two signals are acquired, and sending the text to the display screen, and editing the corresponding text of 'impulse voltage fluctuation to be overhauled or peak voltage fluctuation to be overhauled' according to the text when both signals are acquired, and sending the text to the display screen.
2. The method for calibrating the interturn voltage tester according to claim 1, wherein the external form condition information of the interturn voltage tester comprises placement inclination angle data of the interturn voltage tester, panel pointer position data of the interturn voltage tester and electromagnetic interference data of the interturn voltage tester.
3. The method for calibrating the interturn withstand voltage tester according to claim 1, wherein the external observation and monitoring operation comprises the following specific steps:
the method comprises the following steps: acquiring external form condition information of the interturn voltage tester in real time, and respectively marking the placing inclination angle data, the panel pointer position data and the electromagnetic interference data as Q, W and E;
step two: when the placing inclination angle data Q of the turn-to-turn voltage tester is larger than the maximum value of the preset range Q, is positioned in the preset range Q and is smaller than the minimum value of the preset range Q, sequentially giving calibration positive values A1, A2 and A3 to the placing inclination angle data Q of the turn-to-turn voltage tester, wherein A1 is larger than A2 and is larger than A3; when the panel pointer position data W of the interturn voltage tester is positioned on the left side or the right side of the zero value and is just opposite to the zero value, sequentially giving calibration positive values S1 and S2 to the panel pointer position data W of the interturn voltage tester, wherein S1 is larger than S2; when the electromagnetic interference data E of the interturn voltage-withstanding tester is larger than a preset value E and is smaller than or equal to the preset value E, giving calibration positive values D1 and D2 to the electromagnetic interference data E of the interturn voltage-withstanding tester in sequence, wherein D1 is larger than D2;
step three: the method comprises the steps of firstly respectively giving weight coefficients a, s and d to placing inclination angle data Q of an interturn voltage tester, panel pointer position data W of the interturn voltage tester and electromagnetic interference data E of the interturn voltage tester, wherein a is smaller than d and a + s + d is 5.3285, then obtaining an external index coefficient R of the real-time interturn voltage tester according to a formula R which is Q + a + W + E + d, finally comparing the external index coefficient R with a preset value R, generating an interception calibration signal when the external index coefficient R of the interturn voltage tester is larger than the preset value R, and otherwise generating a passing calibration signal.
4. The method according to claim 1, wherein the internal measurement information of the inter-turn withstanding voltage tester includes operating noise data of the inter-turn withstanding voltage tester, an operating temperature level of the inter-turn withstanding voltage tester, and an operating voltage frequency level of the inter-turn withstanding voltage tester, the operating temperature level of the inter-turn withstanding voltage tester represents a difference between an ambient temperature and a self operating temperature, and is multiplied by a temperature variation per minute, and the operating voltage frequency level of the inter-turn withstanding voltage tester represents a ratio between the operating voltage frequency variation of the inter-turn withstanding voltage tester and a rated voltage frequency.
5. The method for calibrating the interturn withstand voltage tester according to claim 1, wherein the specific steps of the internal calibration analysis operation are as follows:
the method comprises the following steps: acquiring internal measurement condition information of the interturn voltage tester in real time, and respectively calibrating working noise data, a working temperature level and a working voltage frequency quantity as T, Y and U;
step two: according to the formula
Obtaining real-time internal index coefficients P of the interturn voltage tester, wherein z, Y and u are correction factors, z is smaller than Y, z + Y + u is 5.6822, k and h are weighing coefficients, when the difference between the ambient temperature in the working temperature level Y of the interturn voltage tester and the self working temperature is within the preset range, k is 2.55, otherwise k is 1.28, when the working voltage frequency variation in the working voltage frequency quantity of the interturn voltage tester is within the preset range, h is 4.38, otherwise h is 2.91, then the internal index coefficient P of the interturn voltage tester is compared with the preset value P, when the internal index coefficient P of the interturn voltage tester is larger than the preset value P, an internal fluctuation calibration signal is generated according to the internal fluctuation, otherwise, an internal stability calibration signal is generated.
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