CN113884966B - AC/DC sensor broadband calibrator and performance detection calibration method thereof - Google Patents
AC/DC sensor broadband calibrator and performance detection calibration method thereof Download PDFInfo
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Abstract
The application discloses an AC/DC sensor broadband calibrator and a performance detection calibration method thereof, comprising the following steps: the system comprises a signal source, a standard channel, an AC-DC transformer channel and an AC-DC transformer calibrator, wherein the AC-DC transformer calibrator receives signals from the standard channel and the AC-DC transformer, processes information under the mark of an internal clock synchronization unit, transmits obtained standard data, final digital quantity information and final analog quantity information to an upper computer, and judges whether the AC-DC transformer is qualified or not through calculation and comparison. The application realizes the steady-state accuracy, frequency response and transient characteristic test work of a single device on the AC/DC transformer, effectively saves the verification cost and improves the verification efficiency.
Description
Technical Field
The application belongs to the technical field of AC/DC transformer testing, and particularly relates to an instrument for detecting broadband characteristics of an AC/DC transformer.
Background
With the continuous development of the direct current transmission system, especially the application and popularization of the emerging technologies such as flexible direct current transmission, the alternating current-direct current transformer is used as important primary equipment for the construction and operation of the direct current transmission system, and the operation reliability and the measurement accuracy are directly related to the safe and stable operation of the direct current transmission system. With the continuous development of smart grid technology, especially after the localization, operation and maintenance management of the direct current transformer, the field calibration requirement of the direct current transformer is more and more urgent.
The secondary output of the alternating current and direct current transformer is generally divided into analog quantity and digital quantity, and when the test and the debugging are carried out on the engineering site, the steady-state precision error check, the frequency response test and the step response or transient characteristic test of the alternating current and direct current transformer with different principles are carried out under most conditions. Therefore, the construction site verification system is required to have the capabilities of multi-type standard output signals and tested transformer output signal acquisition, the traditional power transformer with analog output is also required to be considered, and the multi-type protocol self-adaptive receiving processing of the electronic transformer in the conventional direct current and flexible direct current engineering is also required.
The secondary signal transmission of the standard device in the field detection is easy to interfere, and the primary and secondary of the field high-voltage test are difficult to isolate. In addition, the tested AC/DC transformer has both analog output and digital output, and the secondary output signal shows multiple types. Thus, the types of instruments to be prepared on the construction site are complex, and the operation difficulty is high.
Disclosure of Invention
The application provides an AC/DC sensor broadband calibrator and a performance detection calibration method thereof, which are used for solving the problems that multiple devices are required to work cooperatively and the operation difficulty is high when an AC/DC transformer is calibrated.
The application is realized by the following technical scheme:
an ac/dc sensor broadband calibrator comprising: the system comprises a signal source, a standard channel, an AC/DC transformer channel and an AC/DC transformer calibrator; the AC/DC transformer calibrator comprises: the system comprises a standard input unit, a unit clock synchronization unit, an AC/DC transformer input unit, a digital quantity port, a tested current signal port, a tested voltage signal port, a digital quantity processing module, an analog quantity processing module and an upper computer;
the upper computer comprises an upper computer distribution unit, a direct current component verification system, an alternating current steady-state verification system and a transient step verification system;
the standard channel is configured to receive and process an original signal from a signal source, and transmit a standard signal processed by the standard channel to the standard input unit;
the AC/DC transformer channel is configured to process the received original signal from the signal source into an AC/DC transformer signal and transmit the AC/DC transformer signal to the AC/DC transformer channel input unit;
the standard input unit is configured to receive the time mark of the clock synchronization unit, convert the standard signal containing the time mark into standard data, and transmit the standard data to the upper computer distribution unit;
the AC/DC transformer input unit is configured to receive the time mark of the clock synchronization unit, process the AC/DC transformer signal containing the time mark into AC/DC transformer data, and transmit the AC/DC transformer data to the digital port, the tested current signal port and the tested voltage signal port;
the digital quantity port is configured to extract digital quantity information from the AC/DC transformer data and transmit the digital quantity information to the digital quantity processing module;
the digital quantity processing module is configured to analyze the digital quantity information, and the analyzed final digital quantity information is transmitted to the upper computer distribution unit;
the tested current signal port is configured to extract current signal information from the time-marked AC/DC transformer signal and transmit the current signal quantity information to the analog quantity processing module;
the measured voltage signal port is configured to extract voltage signal information from the time-marked AC/DC transformer signal and transmit the voltage signal quantity information to the analog quantity processing module;
the analog quantity processing block is configured to filter and analyze the current signal quantity information and the voltage signal quantity information, and transmit the processed final analog quantity information to the upper computer distribution unit.
Further, the upper computer is configured to compare the direct current measurement error, the step response characteristic measurement error and the frequency response characteristic measurement error of the calibrator with a set error range; the actual error value is in the error range, and the qualification of the AC-DC transformer is judged; and the actual error value is out of the error range, and the AC-DC transformer is judged to be required to be adjusted.
Further, the measured voltage signal port comprises an I/V, V/V converter.
Further, the standard channel comprises a direct current comparator, a standard direct current high voltage divider, a harmonic standard signal sampler and a step standard signal sampler.
Further, the signal source comprises a multi-type voltage-current signal source and a signal generator.
The second aspect of the application provides a method for detecting and calibrating the broadband performance of an ac/dc sensor, which is applied to the broadband calibrator of the ac/dc sensor in the first aspect, and comprises the following steps:
the signal source provides original signals for the standard channel and the AC/DC transformer channel;
the standard channel processes the original signal to obtain a standard signal, and then the standard channel transmits the standard signal to the standard input unit;
the AC/DC transformer channel is used for processing the original signal to obtain an AC/DC transformer signal, and then the AC/DC transformer channel is used for transmitting the AC/DC transformer signal to the AC/DC transformer input unit;
the clock synchronization unit marks the standard signals and the AC/DC transformer signals passing through the standard input unit and the AC/DC transformer unit in time;
the standard input unit converts the standard signal with the time mark into standard data, and then the standard input unit transmits the standard data to the upper computer distribution unit;
the AC/DC transformer channel converts the AC/DC transformer signal containing the time mark into AC/DC transformer data, and then the AC/DC transformer channel transmits the AC/DC transformer data to the digital port, the tested current signal port and the tested voltage signal port respectively;
the digital quantity port extracts digital quantity information in the data of the AC/DC transformer and transmits the digital quantity information to the digital quantity processing module;
the digital quantity processing module analyzes the obtained digital quantity information, and the final digital quantity information obtained by analysis is transmitted to the upper computer distribution unit;
the tested current signal port extracts current signal information in the data of the AC/DC transformer and transmits the current signal information to the analog quantity processing module;
the analog processing module filters the obtained current signal information, and the analog processing module transmits the final analog information obtained after the filtering to the upper computer distribution unit;
the tested voltage signal port extracts voltage signal information in the data of the AC/DC transformer and transmits the voltage signal information to the analog quantity processing module;
the analog processing module filters the obtained voltage signal information, and the analog processing module transmits the final analog information obtained after the filtering to the upper computer distribution unit;
the upper computer distribution unit distributes the collected final analog quantity information, the collected final digital quantity information and the collected standard data to the direct current component verification system, the alternating current steady-state verification system and the transient step verification system.
And the direct current component verification system, the alternating current steady-state verification system and the transient step verification system calculate and judge the obtained standard data, the final digital quantity information and the final analog quantity information.
The calibrator and the system provided by the application have the following beneficial effects:
1. and the steady-state accuracy, the frequency response and the transient characteristic test capability of the multi-type transformer are considered.
2. By integrating three different systems, other equipment and instruments are not needed when the system is used, and time is saved.
3. The broadband test device can be used for a traditional electromagnetic transformer and an electronic transformer, and can also be used for broadband test of voltage and current transformers.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a broadband calibration instrument for an AC/DC sensor according to the present application;
FIG. 2 is a schematic flow chart of a method for detecting and calibrating the broadband performance of an AC/DC sensor according to the present application;
fig. 3 is a specific flowchart of step S113 of the method for detecting and calibrating wideband performance of an ac/dc sensor according to the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The AC/DC transformer is used as an important primary device for construction and operation of the DC transmission system, and the operation reliability and the measurement accuracy are directly related to the safe and stable operation of the DC transmission system. The secondary output of the alternating current and direct current transformer is generally divided into analog quantity and digital quantity, and when the test and the debugging are carried out on the engineering site, the steady-state precision error check, the frequency response test and the step response or transient characteristic test of the alternating current and direct current transformer with different principles are carried out under most conditions. The secondary signal transmission of the standard device in the field detection is easy to interfere, and the primary and secondary of the field high-voltage test are difficult to isolate. In addition, the tested AC/DC transformer has both analog output and digital output, and the secondary output signal shows multiple types. Thus, the types of instruments to be prepared on the construction site are complex, and the operation difficulty is high. Therefore, the application provides an AC/DC sensor broadband calibrator and an AC/DC sensor broadband performance detection calibration method, which can realize the calibration of broadband characteristics of multiple types of AC/DC transformers in one instrument, effectively improve the calibration efficiency of engineering sites, and the following detailed description of the technical scheme of the application is provided:
referring to fig. 1, embodiment 1 is an ac/dc sensor broadband calibrator, including a signal source, a standard channel, an ac/dc transformer channel, and an ac/dc transformer calibrator.
The signal source is respectively connected with the standard channel and the AC/DC transformer channel, and can apply various voltage and current original signals to the two channels to provide original data for the subsequent verification process. And the standard channel processes the original signal from the signal source to obtain a standard signal which can be received by a subsequent AC/DC transformer calibrator. The AC/DC mutual inductance channel is a tested AC/DC mutual inductance, the original signal is processed by the tested AC/DC mutual inductance and then is transmitted to the AC/DC mutual inductance calibrator. The AC/DC transformer calibrator analyzes the standard signal and the AC/DC transformer signal, processes the standard signal and the AC/DC transformer signal to obtain standard data, final digital quantity information and final analog quantity information, and transmits the analysis result to the upper computer. The upper computer comprises an upper computer configuration unit, a direct current component verification system, an alternating current steady-state verification system and a transient step verification system. The direct current component checking system, the alternating current steady-state checking system and the transient step checking system respectively calculate and judge the analysis result of the alternating current-direct current transformer checking instrument so as to judge whether the alternating current-direct current transformer needs to be adjusted or not.
The AC/DC transformer calibrator comprises a standard input unit, a unit clock synchronization unit, an AC/DC transformer input unit, a digital quantity port, a tested current signal port, a tested voltage signal port, a digital quantity processing module and an analog quantity processing module.
The clock synchronization unit is used for synchronously collecting signals passing through the standard input unit and the AC/DC transformer input unit and time-marking the collected signals. The standard input unit receives standard signals from the standard channel, and transmits the obtained standard data to the upper computer distribution unit after the standard signals are acquired and marked by the clock synchronization unit. The standard data includes the etalon amplitude information u BZ Etalon phase information delta BZ Time T corresponding to etalon information BJ 。
The AC/DC transformer input unit receives AC/DC transformer signals from the standard AC/DC transformer channel, and after the clock synchronization unit collects and marks, the obtained AC/DC transformer data are respectively transmitted to the digital value port, the tested current signal port and the tested current signal port.
The digital quantity port can extract digital quantity information in the data of the AC/DC transformer, and after the message analysis, the digital quantity information is transmitted to the digital quantity processing module. The digital quantity processing module can extract the time T corresponding to the detected transformer from the digital quantity information BJ ，T BJ And the final digital quantity information is transmitted to an upper computer distribution unit through a digital quantity processing module.
And the tested current signal port extracts current signal information from the data of the AC/DC transformer and transmits the current signal information to the analog quantity processing module. And the tested voltage signal port extracts voltage signal information from the data of the AC/DC transformer and transmits the voltage signal information to the analog quantity processing module.
The analog processing module processes the current signal information and the voltage signal information to obtain transformer amplitude information u BJ Phase information delta of detected transformer BJ ，u BJ 、δ BJ And the final analog quantity information is transmitted to an upper computer distribution unit.
The upper computer can utilize the received data u BZ 、δ BZ 、T BZ 、u BJ 、δ BJ 、T BJ Calculating to obtain f (the ratio error of the detected direct current transformer), delta (the phase error of the detected direct current transformer) and delta t (the delay time of the detected direct current transformer), wherein the calculation method is as follows:
f＝(u BJ -u BZ )/u BZ (1)
δ＝(δ BJ -δ BZ )/δ BZ (2)
Δt＝T BJ -T BZ (3)
The upper computer can judge the direct current measurement error, the step response characteristic measurement error and the frequency response characteristic measurement error of the calibrator by utilizing the three formulas. Wherein the upper computer distribution unit distributes u BZ 、δ BZ 、T BZ 、u BJ 、δ BJ 、T BJ And the system is distributed to a direct current component checking system, an alternating current steady-state checking system and a transient step checking system. The direct current component checking system can judge the direct current measurement error of the checking instrument by using the formula 1, the alternating current steady-state checking system judges the step response characteristic measurement error by using the formulas 1 and 3, and the transient step checking system frequency response characteristic measurement error is judged by using the formulas 1 and 2.
And comparing the obtained actual error value with a standard range by the upper computer, judging that the AC-DC transformer is qualified when the actual error value is smaller than or equal to the standard range, and judging that the AC-DC transformer needs to be adjusted when the actual error value is larger than the standard range.
Further on the basis of the embodiment 1, the tested voltage signal port is provided with an I/V, V/V converter.
It should be noted that, if the analog output type transformer is calibrated, the secondary signal voltage and current of the transformer generally need to be I/V and V/V converted by the I/V, V/V converter, so as to achieve the sampling voltage required by the analog input port of the calibrator.
Further, on the basis of embodiment 1, the standard channel includes a direct current comparator, a standard direct current high voltage divider, a harmonic standard signal sampler, and a step standard signal sampler.
The current comparator is an electrical measuring instrument for measuring the current ratio, the standard direct current high voltage divider is mainly used for measuring the pulse high voltage, the harmonic standard signal sampler is used for collecting the harmonic of the standard signal, and the step standard signal sampler is used for collecting the step signal of the standard signal. Through the cooperation of the systems, standard data for comparing with the final digital quantity signal and the final analog quantity signal of the AC/DC transformer is obtained.
Further, on the basis of embodiment 1, the digital quantity processing module and the analog quantity acquisition module for data acquisition are both high-precision data acquisition modules.
The high-precision data acquisition module is used for improving the calibration accuracy of the AC/DC transformer calibrator.
Further, based on embodiment 1, the ac/dc transformer channel may be replaced by a conventional electromagnetic transformer or an electronic transformer.
By means of the system, the traditional electromagnetic transformer and the electronic transformer can be subjected to broadband verification while the AC/DC transformer is verified.
Based on the embodiment 1, the standard channel further has the capability of collecting multiple types of signals with high precision, and the direct current component, the high-frequency alternating current component and the transient step signal are collected and converted.
It should be noted that, in order to measure data errors corresponding to different types of ac/dc transformers, the standard channel needs to have a corresponding signal acquisition capability.
Further, on the basis of embodiment 1, the signal source includes a signal generator and a multi-type voltage-current signal source.
It should be noted that the signal generator is configured to provide a small current, voltage, and the multi-type voltage-current signal source is configured to provide a large current and a high voltage. The device provided by the device can simultaneously meet the two existing measurement verification requirements.
Further, based on embodiment 1, the verification error range of the upper computer can be changed according to the actual requirement.
An example of a practical application of the present application is given below.
In order to verify the direct current measurement error, the step response characteristic measurement error and the frequency response measurement error of the calibrator, a signal generator is adopted to generate a small voltage signal, the small voltage signal enters a standard channel of the AC-DC transformer calibrator, the true value actually output by the signal generator is measured through six-bit half-meter test, and then the output value of the standard channel is compared with the channel value of a sample output by the AC-DC transformer calibrator for verification. The results are recorded in the following table.
As can be seen from the above table, the maximum allowable error satisfies + -0.5 mV when the input voltage amplitude is less than or equal to 0.25V. When the voltage is 0.25V-10V, the maximum allowable error is satisfied with + -0.2%.
The following table shows the comparison of the measured error of the bit step response characteristic.
As can be seen from the table, the rise time value and the fall time value of the step response of the calibrator are both within +/-10 mu s of the maximum allowable error, and the overshoot is less than the prescribed range value of +/-2%.
The following table shows the frequency response measurement error results at an input voltage of 1V.
As can be seen from the table, when the signal of 50 Hz-3000 Hz is input, the amplitude error of the collected signal is smaller than the prescribed range value plus or minus 0.2%, and the phase error is smaller than plus or minus 10 xf/50.
Therefore, whether the AC-DC transformer is qualified or not can be accurately judged through the AC-DC transformer verification system.
The embodiment and principle analysis of the device for detecting the DC resistance of the current transformer provided by the embodiment of the application are provided, and the following is an embodiment of the method for detecting and calibrating the wideband performance of the AC/DC sensor provided by the embodiment of the application.
Referring to fig. 2, fig. 2 is a flow chart of a method for detecting and calibrating broadband performance of an ac/dc sensor according to an embodiment of the application.
Step S101, a signal source provides original signals for a standard channel and an AC/DC transformer channel.
It should be noted that, the signal source according to the embodiment of the present application can apply various types of voltage and current original signals to two channels.
Step S102, the standard channel processes the original signal to obtain a standard signal, and then the standard channel transmits the standard signal to the standard input unit.
The standard channel comprises a direct current comparator, a standard direct current high voltage divider, a harmonic standard signal sampler and a step standard signal sampler. It should be noted that, the standard channel of the embodiment of the application has the capability of collecting multiple types of signals with high precision, and integrates the collection and conversion of direct current components, high-frequency alternating current components and transient step signals. To match the demands of the upper computer for different types of data.
And step S103, the AC/DC transformer channel processes the original signal to obtain an AC/DC transformer signal, and then the AC/DC transformer channel transmits the AC/DC transformer signal to the AC/DC transformer input unit.
It should be noted that the ac/dc transformer channel in the embodiment of the present application may be replaced by a conventional electromagnetic transformer and an electronic transformer. That is, the broadband verification can be performed for the traditional electromagnetic transformer and the electronic transformer while the first-use function is ensured.
And step S104, the clock synchronization unit marks the standard signal and the AC/DC transformer signal passing through the standard input unit and the AC/DC transformer unit.
It should be noted that, the clock synchronization unit of the embodiment of the application can synchronously collect signals in the quasi-input unit and the ac/dc transformer unit, and realize closed loop test of the ac/dc transformer calibrator based on determining delay time synchronization.
Step 105, the standard input unit converts the standard signal with the time stamp into standard data, and then the standard input unit transmits the standard data to the upper computer distribution unit.
It should be noted that the standard data in the embodiment of the present application includes the etalon amplitude information u BZ Etalon phase information delta BZ Time T corresponding to etalon information BJ 。
And S106, converting the AC/DC transformer signal containing the time mark into AC/DC transformer data by the AC/DC transformer channel, and then transmitting the AC/DC transformer data to the digital port and the tested current signal port by the AC/DC transformer channel respectively.
It should be noted that, when the tested voltage signal port of the embodiment of the application performs the calibration of the analog output type transformer, an I/V, V/V converter is generally added in front of the tested voltage signal port, so as to perform I/V and V/V conversion on the secondary signal voltage and current of the transformer, so as to achieve the sampling voltage required by the analog input port of the calibrator.
And step S107, the digital quantity port extracts digital quantity information in the data of the AC/DC transformer and transmits the digital quantity information to the digital quantity processing module.
And S108, the digital quantity processing module analyzes the obtained digital quantity information, and the analyzed final digital quantity information is transmitted to the upper computer distribution unit.
It should be noted that, the digital quantity information in the embodiment of the present application is T BZ 。
And step 109, extracting current signal information in the data of the AC/DC transformer by the tested current signal port and transmitting the current signal information to the analog quantity processing module.
And S110, filtering the obtained current signal information by the analog quantity processing module, and transmitting the final analog quantity information obtained after filtering to the upper computer distribution unit by the analog quantity processing module.
And step S111, extracting voltage signal information in the data of the AC/DC transformer by the tested voltage signal port and transmitting the voltage signal information to the analog quantity processing module.
And S112, filtering the obtained voltage signal information by the analog quantity processing module, and transmitting the final analog quantity information obtained after filtering to the upper computer distribution unit by the analog quantity processing module.
It should be noted that, the final analog quantity information in the embodiment of the present application is the detected transformer amplitude information u BJ Phase information delta of detected transformer BJ 。
It should be noted that, step S107 and step S108 in the embodiment of the present application are digital quantity processing procedures; step S109 and step S110 are processes of processing current analog quantity; step S111 and step S112 are voltage analog processing procedures, the three processing procedures are relatively independent, and the sequence of the steps can be interchanged.
It should be noted that, step S105 of the embodiment of the present application is a standard data acquisition process; step S106 to step S112 are the acquisition process of the data of the AC/DC transformer, the two processes are relatively independent, and the sequence of the steps can be interchanged.
And step S113, the upper computer calculates and judges the standard data, the final digital quantity information and the final analog quantity information.
The upper computer distributes standard data, final digital quantity information and final analog quantity information to a direct current component verification system, an alternating current steady-state verification system and a transient step verification system by using an upper computer distribution unit to calculate and judge.
Step S113 of the embodiment of the present application may further include the following steps, referring to fig. 3:
step S201, comparing the DC measurement error, the step response characteristic measurement error and the frequency response characteristic measurement error of the calibrator with the step S113 and the error range of each parameter setting;
it should be noted that, the error range of the embodiment of the present application may be set according to actual requirements.
Step S202, judging that the actual error value is in an error range, and considering that the AC-DC transformer is qualified;
and step 203, judging that the actual error value is out of the error range, and considering that the AC/DC transformer needs to be adjusted.
It should be noted that the order of step S202 and step S203 in the embodiment of the present application may be interchanged.
It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to the corresponding process in the foregoing apparatus embodiment for the specific working process of the above-described method, which is not described in detail herein.
The application can effectively check the AC/DC transformer and has the following advantages:
1. the steady-state accuracy, the frequency response and the transient characteristic test capability of the multi-type transformer are considered;
2. by integrating three different systems, other equipment and instruments are not required to be added during testing, so that the time is saved;
3. the broadband test device can be used for a traditional electromagnetic transformer and an electronic transformer, and can also be used for broadband test of voltage and current transformers.
Claims (10)
1. An ac/dc sensor broadband calibrator, comprising: the system comprises a signal source, a standard channel, an AC/DC transformer channel and an AC/DC transformer calibrator; the AC/DC transformer calibrator comprises: the system comprises a standard input unit, a unit clock synchronization unit, an AC/DC transformer input unit, a digital quantity port, a tested current signal port, a tested voltage signal port, a digital quantity processing module, an analog quantity processing module and an upper computer; the upper computer comprises an upper computer distribution unit, a direct current component verification system, an alternating current steady-state verification system and a transient step verification system;
the standard channel is configured to receive and process an original signal from a signal source, and transmit a standard signal processed by the standard channel to the standard input unit;
the AC/DC transformer channel is configured to process the received original signal from the signal source into an AC/DC transformer signal and transmit the AC/DC transformer signal to the AC/DC transformer channel input unit;
the standard input unit is configured to receive the time mark of the clock synchronization unit, convert the standard signal containing the time mark into standard data, and transmit the standard data to the upper computer distribution unit;
the AC/DC transformer input unit is configured to receive the time mark of the clock synchronization unit, process the AC/DC transformer signal containing the time mark into AC/DC transformer data, and transmit the AC/DC transformer data to the digital port, the tested current signal port and the tested voltage signal port;
the digital quantity port is configured to extract digital quantity information from the AC/DC transformer data and transmit the digital quantity information to the digital quantity processing module;
the digital quantity processing module is configured to analyze the digital quantity information, and the analyzed final digital quantity information is transmitted to the upper computer distribution unit;
the tested current signal port is configured to extract current signal information from the time-marked AC/DC transformer signal and transmit the current signal quantity information to the analog quantity processing module;
the measured voltage signal port is configured to extract voltage signal information from the time-marked AC/DC transformer signal and transmit the voltage signal quantity information to the analog quantity processing module;
the analog quantity processing block is configured to filter and analyze the current signal quantity information and the voltage signal quantity information, and transmit the processed final analog quantity information to the upper computer distribution unit;
the upper computer distribution unit is configured to distribute the collected final analog quantity information, the collected final digital quantity information and the collected standard data to the direct current component verification system, the alternating current steady-state verification system and the transient step verification system.
2. The ac/dc sensor broadband calibrator according to claim 1, wherein the standard data comprises: etalon amplitude information u BZ Etalon phase information delta BZ Time T corresponding to etalon information BZ ；
The final digital quantity information is the time T corresponding to the detected transformer BJ ；
The final analog quantity information is the detected transformer amplitude information u BJ Phase information delta of detected transformer BJ 。
3. The ac/dc sensor broadband calibration apparatus according to claim 2, wherein said host computer is configured to:
using the formula f= (u) BJ -u BZ )/u BZ Calculating the ratio error of the detected direct current transformer; using the formula δ= (δ) BJ -δ BZ )/δ BZ Calculating the phase error of the detected direct current transformer; using the formula Δt=t BJ -T BZ Calculating the delay time of the detected direct current transformer;
the direct current component checking system uses the formula f= (u) BJ -u BZ )/u BZ Comparing the obtained error value with a standard range, and judging whether the direct current measurement error is qualified or not;
the transient step verification system uses the formula Δt=t BJ -T BZ Sum f= (u) BJ -u BZ )/u BZ Comparing the obtained error value with a standard range, and judging whether the step response characteristic measurement error is qualified or not;
the alternating-current steady-state verification system utilizes a formula delta= (delta) BJ -δ BZ )/δ BZ Sum f= (u) BJ -u BZ )/u BZ And comparing the obtained error value with a standard range, and judging whether the frequency response characteristic measurement error is qualified or not.
4. An ac/dc sensor broadband calibrator according to claim 3, wherein the host computer is configured to compare a calibrator dc measurement error, a step response characteristic measurement error, a frequency response characteristic measurement error with a set error range; the actual error value is in the error range, and the qualification of the AC-DC transformer is judged; and the actual error value is out of the error range, and the AC-DC transformer is judged to be required to be adjusted.
5. The ac/dc sensor broadband calibration apparatus according to claim 1, wherein said voltage signal port comprises an I/V, V/V converter.
6. The ac/dc sensor broadband calibrator as claimed in claim 1, wherein the standard channel comprises a standard channel comprising a dc current comparator, a standard dc high voltage divider, a harmonic standard signal sampler, and a step standard signal sampler; the signal sources include multiple types of voltage-current signal sources and signal generators.
7. The method for detecting and calibrating the broadband performance of the AC/DC sensor is characterized by being applied to the broadband calibrator of the AC/DC sensor in any one of claims 1-6, and comprises the following steps:
the signal source provides original signals for the standard channel and the AC/DC transformer channel;
the standard channel processes the original signal to obtain a standard signal, and then the standard channel transmits the standard signal to the standard input unit;
the AC/DC transformer channel is used for processing the original signal to obtain an AC/DC transformer signal, and then the AC/DC transformer channel is used for transmitting the AC/DC transformer signal to the AC/DC transformer input unit;
the clock synchronization unit marks the standard signals and the AC/DC transformer signals passing through the standard input unit and the AC/DC transformer unit in time;
the standard input unit converts the standard signal with the time mark into standard data, and then the standard input unit transmits the standard data to the upper computer distribution unit;
the AC/DC transformer channel converts the AC/DC transformer signal containing the time mark into AC/DC transformer data, and then the AC/DC transformer channel transmits the AC/DC transformer data to the digital port, the tested current signal port and the tested voltage signal port respectively;
the digital quantity port extracts digital quantity information in the data of the AC/DC transformer and transmits the digital quantity information to the digital quantity processing module;
the digital quantity processing module analyzes the obtained digital quantity information, and the final digital quantity information obtained by analysis is transmitted to the upper computer distribution unit;
the tested current signal port extracts current signal information in the data of the AC/DC transformer and transmits the current signal information to the analog quantity processing module;
the analog processing module filters the obtained current signal information, and the analog processing module transmits the final analog information obtained after the filtering to the upper computer distribution unit;
the tested voltage signal port extracts voltage signal information in the data of the AC/DC transformer and transmits the voltage signal information to the analog quantity processing module;
the analog processing module filters the obtained voltage signal information, and the analog processing module transmits the final analog information obtained after the filtering to the upper computer distribution unit;
the upper computer distribution unit distributes the collected final analog quantity information, the final digital quantity information and the standard data to a direct current component verification system, an alternating current steady-state verification system and a transient step verification system;
and the direct current component verification system, the alternating current steady-state verification system and the transient step verification system calculate and judge the obtained standard data, the final digital quantity information and the final analog quantity information.
8. The method for detecting and calibrating broadband performance of an ac/dc sensor according to claim 7, wherein the standard data comprises: etalon amplitude information u BZ Etalon phase information delta BZ Time T corresponding to etalon information BZ ；
The final digital quantity information is the time T corresponding to the detected transformer BJ ；
The final analog quantity information is the detected transformer amplitude information u BJ Phase information delta of detected transformer BJ 。
9. The method for detecting and calibrating broadband performance of an ac/dc sensor according to claim 8, further comprising:
using the formula f= (u) BJ -u BZ )/u BZ Calculating the ratio error of the detected direct current transformer; using the formula δ= (δ) BJ -δ BZ )/δ BZ Calculating the phase error of the detected direct current transformer; using the formula Δt=t BJ -T BZ Calculating the delay time of the detected direct current transformer;
using the formula f= (u) BJ -u BZ )/u BZ Comparing the obtained error value with a standard range, and judging whether the direct current measurement error is qualified or not;
using the formula Δt=t BJ -T BZ Sum f= (u) BJ -u BZ )/u BZ Comparing the obtained error value with a standard range, and judging whether the step response characteristic measurement error is qualified or not;
using the formula δ= (δ) BJ -δ BZ )/δ BZ Sum f= (u) BJ -u BZ )/u BZ And comparing the obtained error value with a standard range, and judging whether the frequency response characteristic measurement error is qualified or not.
10. The method for detecting and calibrating wideband performance of an ac/dc sensor according to claim 9, wherein the step of determining the error result by the host computer comprises:
comparing the direct current measurement error, the step response characteristic measurement error and the frequency response characteristic measurement error of the calibrator with error ranges set by all parameters;
judging that the actual error value is in the error range, and considering the AC-DC transformer to be qualified;
and judging that the actual error value is out of the error range, and considering that the AC-DC transformer needs to be adjusted.
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