CN117691974A - Voltage frequency conversion method and device based on Beidou satellite clock synchronization - Google Patents
Voltage frequency conversion method and device based on Beidou satellite clock synchronization Download PDFInfo
- Publication number
- CN117691974A CN117691974A CN202311664808.5A CN202311664808A CN117691974A CN 117691974 A CN117691974 A CN 117691974A CN 202311664808 A CN202311664808 A CN 202311664808A CN 117691974 A CN117691974 A CN 117691974A
- Authority
- CN
- China
- Prior art keywords
- voltage
- output
- frequency
- module
- electrically connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 claims abstract description 47
- 238000002955 isolation Methods 0.000 claims description 35
- 230000008878 coupling Effects 0.000 claims description 27
- 238000010168 coupling process Methods 0.000 claims description 27
- 238000005859 coupling reaction Methods 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/156—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
The invention relates to a voltage frequency conversion method and device based on Beidou satellite clock synchronization, and relates to the field of calibration systems, wherein the method comprises the following steps: the input alternating voltage is converted into output alternating voltage through a voltage converter; the output alternating voltage is converted into direct voltage with equal proportion through a linear rectifying module; the direct current voltage is converted into output frequency which is in linear relation with the direct current voltage through voltage frequency; the voltage frequency conversion synchronizing signal input is connected with the time synchronizing signal of the Beidou satellite synchronizing clock signal module, so that the output frequency is synchronized with the clock signal of the Beidou satellite. The invention eliminates errors introduced by voltage remote calibration time, obtains precise integration period through synchronizing frequency signals, realizes voltage frequency conversion, and eliminates errors caused by passive devices.
Description
Technical Field
The invention relates to the field of calibration systems, in particular to a voltage frequency conversion method and device based on Beidou satellite clock synchronization.
Background
At present, the traditional AC voltage calibration is carried out under the reference condition of a metering laboratory, only the basic error of an AC voltmeter or a source is obtained, the calibration efficiency is low, and the additional error of metering equipment in field application cannot be obtained. In recent years, a remote calibration technology based on a satellite co-vision method becomes a hot spot direction of metering development, so that the problem that additional errors are difficult to measure can be solved, the accuracy and reliability of metering data are ensured, the calibration efficiency can be improved, and a foundation is laid for intelligent remote calibration application of on-site metering equipment.
The key technology of voltage remote calibration is voltage frequency conversion, the existing voltage frequency conversion technology is affected by factors such as temperature, noise and the like, and the precision and stability of the voltage frequency conversion technology cannot meet the strict industrial and scientific application requirements; the existing voltage frequency converter generally adopts an asynchronous mode, the conversion precision and frequency are determined by an integral capacitor and a resistor, synchronous conversion of different measurement points cannot be realized, remote synchronization cannot be realized, and the voltage frequency converter cannot be applied to a remote calibration system.
Disclosure of Invention
In order to further solve the synchronization problem of voltage remote calibration, the invention provides a voltage frequency conversion method and device based on Beidou satellite clock synchronization. The charge balance type voltage frequency conversion provided by the invention uses the capacitor as a charge carrier, adopts the conversion modes of externally connected stable frequency signals, multivibrator and charge balance type, improves the conversion precision and stability, and ensures that the charge balance type voltage frequency conversion has higher anti-interference capability.
According to the voltage frequency conversion method and device, the synchronous clock signal of the Beidou satellite is used as a reference, the output frequency of the voltage frequency conversion is synchronized, the simultaneous conversion of the measured voltages of different sites at the same time is realized, and the time-introduced error is eliminated. And the remote calibration and measurement of the electric power metering are conveniently realized.
According to the voltage frequency conversion method and device, the synchronous signal Fc is externally connected, the precise integration period is obtained through the synchronous frequency signal, the voltage frequency conversion is realized, and the transfer function is F OUT ＝(V 2 20), the conversion precision is determined by the precision of the accessed synchronous signal Fc, and the error caused by a passive device is eliminated; since the reference of Fc is the synchronous clock signal of the Beidou satellite, the voltage frequency conversion accuracy is ensured.
The technical scheme of the invention is as follows:
a voltage frequency conversion method based on Beidou satellite clock synchronization comprises the following steps:
s1, converting input alternating voltage into output alternating voltage through a voltage converter;
s2, converting the output alternating voltage into direct voltage with equal proportion through a linear rectifying module;
s3, converting the direct-current voltage into output frequency which is in linear relation with the direct-current voltage through voltage frequency;
s4, synchronizing signals of the voltage frequency conversion are input and connected with time synchronizing signals of the Beidou satellite synchronizing clock signal module, so that output frequency is synchronized with clock signals of the Beidou satellite.
Further, in S1, the effective value of the converted output ac voltage is 0.0007V to 7V.
Further, in S4, in order to reduce the interference of the external circuit to the converter, the output frequency outputs the conversion frequency through the high-speed photo-isolator; the output frequency is 50Hz-500kHz.
The invention also relates to a voltage frequency conversion device based on Beidou satellite clock synchronization, which comprises a voltage converter, a linear rectification module, a voltage frequency conversion module, a satellite synchronization signal module and a photoelectric isolation module;
the system comprises a voltage converter, a linear rectifying module, a voltage frequency conversion module, a satellite synchronous signal module and a photoelectric isolation module, wherein the voltage converter, the linear rectifying module, the voltage frequency conversion module, the satellite synchronous signal module and the photoelectric isolation module are sequentially connected;
the input alternating voltage is converted into output alternating voltage through a voltage converter;
the output alternating voltage is converted into direct voltage with equal proportion through a linear rectifying module;
the direct-current voltage is converted into output frequency which is in linear relation with the direct-current voltage through a voltage frequency conversion module; and the synchronous signal input of the voltage frequency conversion module is connected with the time synchronous signal of the Beidou satellite synchronous clock signal module, so that the output frequency is synchronous with the clock signal of the Beidou satellite.
Further, the effective value of the converted output alternating voltage is 0.0007V-7V.
Further, in order to reduce the interference of an external circuit on the converter, the output frequency passes through a high-speed photoelectric isolation module to output the conversion frequency, and the output frequency is 50Hz-500kHz.
Further, the voltage frequency conversion module comprises an integrator, a comparator, a trigger, a latch, an integrating capacitor, an integrating resistor and a reference voltage;
the direct current signal is connected with the integrating resistor, the other end of the integrating resistor is electrically connected with the input negative end of the integrator and the integrating capacitor, the other end of the integrating capacitor is electrically connected with the output of the integrator, and the input positive end of the integrator is grounded; the output end of the integrator is electrically connected with the input negative end of the comparator, and is compared with the reference voltage of the input positive end of the comparator, and when the output voltage of the comparator is more than or equal to the reference voltage, the comparator outputs a high level; when the output voltage of the comparator is smaller than the reference voltage, the comparator outputs a low level; the output end of the comparator is electrically connected with the input end of the trigger, the clock signal of the trigger is electrically connected with the synchronous signal, the output of the trigger controls the charge and discharge of the integrating capacitor, meanwhile, the output of the trigger is electrically connected with the base stage of the output triode through the latch, the emitter of the output triode is grounded, and the collector is electrically connected with the frequency output.
Further, the high-speed photoelectric isolation module converts the frequency and forms electric isolation with an external component using the frequency, and the high-speed photoelectric isolation module comprises a first resistor, a second resistor and a high-speed photoelectric coupling device; one end of the first resistor is electrically connected with a power supply, the other end of the first resistor is electrically connected with the 2 pin of the high-speed photoelectric coupling device, and the frequency output of the converter is connected with the 3 pin of the high-speed photoelectric coupling device; the high-speed photoelectric coupling device comprises a high-speed photoelectric coupling device, a power supply, an isolation power supply positive end, an isolation power supply negative end, a high-speed photoelectric coupling device and a high-speed photoelectric coupling device, wherein the isolation power supply positive end is electrically connected with one end of a first resistor, the isolation power supply negative end is electrically connected with the other end of the second resistor, the isolation power supply negative end is electrically connected with a high-speed photoelectric coupling device 5, the isolation power supply negative end is electrically connected with the high-speed photoelectric coupling device 6, isolated conversion frequency outputs are respectively arranged on the high-speed photoelectric coupling device 6, and the two conversion frequency outputs are synchronous in the same frequency.
The invention also relates to a Beidou satellite common-view alternating voltage remote metering method which is suitable for the method or the device, a preset calibration scheme is selected on automatic calibration software of a laboratory computer, calibration is started, and a three-phase standard voltage source and a portable intelligent substation comprehensive tester synchronously output corresponding measuring point voltages; after the test process is finished, the calibration data are stored in a database, software performs data analysis processing based on a designed algorithm, and the average value of repeated measurement data of each measurement point of the voltage source to be calibrated is taken as a measurement result V X The uncertainty is given by adopting a GUM evaluation method, and the three-phase standard source display value is V N According to the calculation formula Δ= V X -V N And obtaining the indication error of the corrected alternating current voltage source.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention realizes synchronous conversion by designing the voltage frequency conversion module: and generating synchronous frequency signals of the voltage-frequency converter by taking the Beidou satellite clock synchronous signals as a reference, realizing voltage-frequency conversion synchronization of different measuring points, and eliminating errors introduced by voltage remote calibration time. The precise integration period is obtained through the synchronous frequency signal, so that the voltage frequency conversion is realized, and the error caused by a passive device is eliminated.
2. The invention realizes high-precision conversion: by adopting a charge balance type conversion mode and combining the high-precision characteristic of the U3 chip, the high-precision conversion from voltage to frequency is realized by only connecting an external integration capacitor, and the characteristic of the integration capacitor does not influence the transfer function F of the converter OUT ＝(V2/20)*Fc，F OUT The maximum value is 2MHz.
3. The invention has good stability: the U3 chip adopts a scaling integral resistor with low temperature drift, and the temperature coefficient is less than 15ppm. F (F) OUT <1000kHz, linearity error<0.005％。
4. The invention has strong anti-interference capability: the charge balance type voltage frequency conversion module effectively inhibits the influence of external noise and interference on a conversion result by selecting a proper filter circuit and introducing the anti-interference capability of the U3 chip. This enables the converter to operate in a complex electromagnetic environment and maintain stable and reliable conversion performance.
5. The invention has good flexibility: by configuring the peripheral circuits, different types of voltage-to-frequency or frequency-to-voltage conversion circuits can be conveniently constructed. This flexibility allows the module to accommodate a wide variety of application requirements, improving its applicability and practicality.
Drawings
FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a voltage converter and linear rectification module of an apparatus of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a voltage-to-frequency conversion module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a high-speed photovoltaic isolation module according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a correspondence relationship between output frequencies and synchronization signals according to an embodiment of the present invention;
fig. 6 is a schematic diagram of satellite common view calibration according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments, all other embodiments that may be made by one of ordinary skill in the art without making any inventive effort are within the scope of the present application.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given a general meaning as understood by one of ordinary skill in the art. The terms "first," "second," and the like, as used in this embodiment, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. "upper", "lower", "left", "right", "transverse", and "vertical", etc. are used only with respect to the orientation of the components in the drawings, these directional terms are relative terms, which are used for descriptive and clarity with respect thereto and which may vary accordingly with respect to the orientation in which the components are disposed in the drawings.
As shown in fig. 1, the high-precision voltage frequency conversion device based on the synchronization of the clock signals of the beidou satellite of the embodiment is suitable for the remote metering calibration of alternating voltage of the beidou satellite common-view method and comprises a voltage converter, a linear rectifying module, a voltage frequency conversion module, a satellite synchronization signal module and a photoelectric isolation module.
The device comprises a voltage converter, a linear rectifying module, a voltage frequency conversion module (V/F conversion module), a satellite synchronous signal module and a photoelectric isolation module, wherein the voltage converter, the linear rectifying module, the voltage frequency conversion module, the satellite synchronous signal module and the photoelectric isolation module are sequentially connected, and the Beidou satellite synchronous clock signal module is connected with the voltage frequency conversion module.
The functions of each module are as follows:
inputting an alternating voltage V of 0.1V-1000V IN The voltage is converted into an alternating voltage V1 by a voltage converter PT1, and the effective value of the alternating voltage V1 is 0.0007V-7V.
The ac voltage V1 is converted into a direct voltage V2 of equal proportion by a precision linear rectifying module.
The direct current voltage V2 is converted into an output frequency F which is in linear relation with the direct current voltage V2 through a voltage frequency conversion module OUT 。
The synchronous signal input of the voltage frequency conversion module is connected with the time synchronous signal of the Beidou satellite synchronous clock signal module to enable the output frequency F OUT And synchronizing with the clock signal of the Beidou satellite. F in order to reduce the interference of external circuits to the converter OUT Through the high-speed photoelectric isolation module, the output conversion frequency is P OUT The output frequency is 50Hz-500kHz.
The Beidou satellite synchronous clock signal module generates a synchronous signal Fc of the voltage frequency conversion module through a frequency doubling circuit based on a pulse per second PPS synchronous signal received by a Beidou satellite, wherein the frequency of Fc is 1MHz.
As shown in fig. 2, the field voltage V IN The linear rectifying module is a linear rectifier formed by a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a Schottky diode D2, an operational amplifier U1 and an operational amplifier U2, and the alternating current signal V1 is converted into a direct current signal V2 with corresponding proportion.
As shown in fig. 3, the voltage-frequency conversion module U3 of the present embodiment includes an integrator, a comparator, a flip-flop, a latch, an integration capacitor C2, an integration resistor R6, and a 5V reference voltage.
Fc is a synchronization signalAnd (5) conveying. The direct current signal V2 is electrically connected with the integrating resistor R6, the other end of the integrating resistor R6 is electrically connected with the input negative end of the integrator and the integrating capacitor C2, the other end of the integrating capacitor C2 is electrically connected with the output of the integrator, and the input positive end of the integrator is grounded. The output end of the integrator is electrically connected with the input negative end of the comparator, and is compared with the 5V reference voltage of the input positive end of the comparator, and when the output voltage of the comparator is more than or equal to the 5V reference voltage, the comparator outputs a high level; when the output voltage of the comparator is less than the 5V reference voltage, the comparator outputs a low level. The output end of the comparator is electrically connected with the input end D of the trigger, the clock signal of the trigger is electrically connected with the synchronization signal Fc, the output of the trigger controls the charge and discharge of the integrating capacitor C2, and meanwhile, the output of the trigger is electrically connected with the base stage of the output triode through the latch, the emitter of the output triode is grounded, and the collector is electrically connected with the frequency output F OUT 。
As shown in fig. 4, the high-speed photoelectric isolation module includes a resistor R7, a resistor R8, and a high-speed photoelectric coupling device U4. The main purpose being to convert the frequency F OUT Form electric isolation with the external part using the frequency, one end of the resistor R7 is electrically connected with a 5V power supply, the other end of the resistor R7 is electrically connected with the 2 pin of the high-speed photoelectric coupling device U4, and the frequency output F of the converter OUT The 3 pins of the high-speed photoelectric coupling device U4 are electrically connected; the 7 pin and the 8 pin of the high-speed photoelectric coupling device U4 and one end of the resistor R8 are electrically connected with the positive end V of the isolation power supply DD The other end of the resistor R8 is electrically connected with the 6 pin of the high-speed photoelectric coupling device U4, the 5 pin of the high-speed photoelectric coupling device U4 is electrically connected with the negative end of the isolation power supply, and the 6 pin of the high-speed photoelectric coupling device U4 is the isolated conversion frequency output P OUT ，F OUT And P OUT Synchronous with the same frequency.
The voltage converter and linear rectification module output V2 of fig. 2 is the input of the voltage to frequency conversion module of fig. 3, the output F of the voltage to frequency conversion module of fig. 3 OUT Is the input to the high-speed photovoltaic isolation module of fig. 4.
FIG. 5 is a schematic diagram showing the correspondence between the output frequency and the synchronization signal, assuming that the value of the DC voltage V2 is 5V, fc in the figure is the synchronization signal of the voltage-frequency converter, the frequency is 1MHz, and the DC voltage V2 outputs triangular waves in the figure through an integrator, and the triangular waves are integratedThe output of the divider and the 5V reference voltage form a D trigger through a comparator and Fc, and the output signal of the trigger drives an output F through a latch and a triode OUT ，F OUT =fc/4. In FIG. 5, F OUT And Fc are strictly synchronized. F (F) OUT Is linear with respect to the frequency of the dc voltage V2.
As a specific example, using the voltage-frequency conversion device based on the Beidou satellite clock synchronization of the embodiment, the calibration work is carried out according to DL/T1112-2019 ac/dc instrument inspection device calibration procedure, and the standard voltage source selects a TD4530 three-phase dc on-site calibrator of the lake south-sky constant measurement and control company. The selected calibrated equipment is a KF86 portable intelligent substation comprehensive tester, and the technical parameters are shown in the following table:
table 1 portable intelligent substation comprehensive tester technical index
The remote calibration of alternating voltage is carried out based on the Beidou satellite co-view method, a satellite co-view calibration principle diagram is shown in fig. 6, and mutual access of a laboratory computer and a calibration site computer is realized through a VPN networking mode. After a laboratory staff confirms that the calibration site environment and wiring are correct through the video monitoring system, according to the technical indexes of the portable intelligent substation comprehensive tester, a pre-established calibration scheme is selected on laboratory computer automatic calibration software, and the three-phase standard voltage source and the portable intelligent substation comprehensive tester synchronously output corresponding measurement point voltages by clicking on 'start calibration'. After the test process is finished, the calibration data are stored in a database, software performs data analysis processing based on a designed algorithm, and the average value of 10 repeated measurement data of each measurement point of the voltage source to be calibrated is taken as a measurement result V X The uncertainty is given by adopting a GUM evaluation method, and the three-phase standard source display valueIs V (V) N According to the calculation formula Δ= V X -V N And obtaining the indication error of the corrected alternating current voltage source. The laboratory computer generated calibration certificate data is shown in table 2 below:
TABLE 2
The embodiment adopts a synchronous high-precision voltage frequency converter, and obtains a precise integration period through externally adding clock frequency to realize voltage frequency conversion. The external clock frequency Fc is obtained through the synchronous clock signal PPS of the Beidou satellite, so that the output frequency of voltage frequency conversion is strictly synchronous with the time synchronous signal of the Beidou satellite, the synchronous conversion of the voltage standard end signal and the remote calibrated end voltage signal is ensured, the time error is eliminated, and the method is particularly suitable for a remote calibration scene of electric power metering.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. A voltage frequency conversion method based on Beidou satellite clock synchronization is characterized by comprising the following steps of: the method comprises the following steps:
s1, converting input alternating voltage into output alternating voltage through a voltage converter;
s2, converting the output alternating voltage into direct voltage with equal proportion through a linear rectifying module;
s3, converting the direct-current voltage into output frequency which is in linear relation with the direct-current voltage through voltage frequency;
s4, synchronizing signals of the voltage frequency conversion are input and connected with time synchronizing signals of the Beidou satellite synchronizing clock signal module, so that output frequency is synchronized with clock signals of the Beidou satellite.
2. The method according to claim 1, characterized in that: s1, the effective value of the converted output alternating voltage is 0.0007V-7V.
3. The method according to claim 1, characterized in that: s4, outputting the conversion frequency through a high-speed photoelectric isolator to reduce the interference of an external circuit on the converter; the output frequency is 50Hz-500kHz.
4. A voltage frequency conversion device based on Beidou satellite clock synchronization is characterized in that: the device comprises a voltage converter, a linear rectification module, a voltage frequency conversion module, a satellite synchronous signal module and a photoelectric isolation module;
the system comprises a voltage converter, a linear rectifying module, a voltage frequency conversion module, a satellite synchronous signal module and a photoelectric isolation module, wherein the voltage converter, the linear rectifying module, the voltage frequency conversion module, the satellite synchronous signal module and the photoelectric isolation module are sequentially connected;
the input alternating voltage is converted into output alternating voltage through a voltage converter;
the output alternating voltage is converted into direct voltage with equal proportion through a linear rectifying module;
the direct-current voltage is converted into output frequency which is in linear relation with the direct-current voltage through a voltage frequency conversion module; and the synchronous signal input of the voltage frequency conversion module is connected with the time synchronous signal of the Beidou satellite synchronous clock signal module, so that the output frequency is synchronous with the clock signal of the Beidou satellite.
5. The apparatus according to claim 4, wherein: the effective value of the converted output alternating voltage is 0.0007V-7V.
6. The apparatus according to claim 4, wherein: the output frequency is converted by a high-speed photoelectric isolation module, and the output frequency is 50Hz-500kHz.
7. The apparatus according to claim 4, wherein: the voltage frequency conversion module comprises an integrator, a comparator, a trigger, a latch, an integrating capacitor, an integrating resistor and a reference voltage;
the direct current signal is connected with the integrating resistor, the other end of the integrating resistor is electrically connected with the input negative end of the integrator and the integrating capacitor, the other end of the integrating capacitor is electrically connected with the output of the integrator, and the input positive end of the integrator is grounded; the output end of the integrator is electrically connected with the input negative end of the comparator, and is compared with the reference voltage of the input positive end of the comparator, and when the output voltage of the comparator is more than or equal to the reference voltage, the comparator outputs a high level; when the output voltage of the comparator is smaller than the reference voltage, the comparator outputs a low level; the output end of the comparator is electrically connected with the input end of the trigger, the clock signal of the trigger is electrically connected with the synchronous signal, the output of the trigger controls the charge and discharge of the integrating capacitor, meanwhile, the output of the trigger is electrically connected with the base stage of the output triode through the latch, the emitter of the output triode is grounded, and the collector is electrically connected with the frequency output.
8. The apparatus according to claim 4, wherein: the high-speed photoelectric isolation module converts the frequency and forms electric isolation with an external component using the frequency, and comprises a first resistor, a second resistor and a high-speed photoelectric coupling device; one end of the first resistor is electrically connected with a power supply, the other end of the first resistor is electrically connected with the 2 pin of the high-speed photoelectric coupling device, and the frequency output of the converter is connected with the 3 pin of the high-speed photoelectric coupling device; the high-speed photoelectric coupling device comprises a high-speed photoelectric coupling device, a power supply, an isolation power supply positive end, an isolation power supply negative end, a high-speed photoelectric coupling device and a high-speed photoelectric coupling device, wherein the isolation power supply positive end is electrically connected with one end of a first resistor, the isolation power supply negative end is electrically connected with the other end of the second resistor, the isolation power supply negative end is electrically connected with a high-speed photoelectric coupling device 5, the isolation power supply negative end is electrically connected with the high-speed photoelectric coupling device 6, isolated conversion frequency outputs are respectively arranged on the high-speed photoelectric coupling device 6, and the two conversion frequency outputs are synchronous in the same frequency.
9. A Beidou satellite common-view alternating voltage remote metering method is characterized by comprising the following steps of: a method or claim applicable to any one of claims 1 to 34-8, selecting a preset calibration scheme on laboratory computer automatic calibration software, starting calibration, and synchronously outputting corresponding measurement point voltages by a three-phase standard voltage source and a portable intelligent substation comprehensive tester; after the test process is finished, the calibration data are stored in a database, software performs data analysis processing based on a designed algorithm, and the average value of repeated measurement data of each measurement point of the voltage source to be calibrated is taken as a measurement result V X The uncertainty is given by adopting a GUM evaluation method, and the three-phase standard source display value is V N According to the calculation formula Δ= V X -V N And obtaining the indication error of the corrected alternating current voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311664808.5A CN117691974A (en) | 2023-12-06 | 2023-12-06 | Voltage frequency conversion method and device based on Beidou satellite clock synchronization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311664808.5A CN117691974A (en) | 2023-12-06 | 2023-12-06 | Voltage frequency conversion method and device based on Beidou satellite clock synchronization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117691974A true CN117691974A (en) | 2024-03-12 |
Family
ID=90127746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311664808.5A Pending CN117691974A (en) | 2023-12-06 | 2023-12-06 | Voltage frequency conversion method and device based on Beidou satellite clock synchronization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117691974A (en) |
-
2023
- 2023-12-06 CN CN202311664808.5A patent/CN117691974A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104330765B (en) | Electric energy meter field calibrating installation based on satellite navigation system | |
| Ramm et al. | A new scheme for generating and measuring active, reactive, and apparent power at power frequencies with uncertainties of 2.5/spl times/10/sup-6 | |
| CN100403036C (en) | Electric power measuring method and its measuring device | |
| CN201444193U (en) | Comprehensive error detection device used for digital electric energy measuring device | |
| Bosco et al. | Phase comparison of high-current shunts up to 100 kHz | |
| CN113156356B (en) | Remote calibration system and calibration method for voltage source | |
| CN105203983A (en) | Flexible alternating current/direct current electronic transformer checking device based on mixed sampling | |
| CN115792776A (en) | Remote calibration system and method for alternating current voltage source | |
| Cataliotti et al. | A virtual instrument for the measurement of IEEE Std. 1459-2000 power quantities | |
| CN110596633A (en) | Calibration system and calibration method of analog input type electronic transformer calibrator | |
| CN203658453U (en) | Wireless secondary voltage-drop and load tester provided with wireless synchronous communication function | |
| CN109581272A (en) | A kind of direct current energy meter detection system | |
| CN112098916A (en) | System and method for superposing ripples on direct current loop in direct current electric energy detection device | |
| Pan et al. | A coaxial time constant standard for the determination of phase angle errors of current shunts | |
| Toth et al. | Power and energy reference system, applying dual-channel sampling | |
| CN111308232B (en) | System and method for measuring stray parameters of current loop of high-power current conversion module | |
| CN110289656A (en) | Battery management circuit and battery module | |
| CN204116594U (en) | Based on the electric energy meter remote calibration device of satellite navigation system | |
| Houtzager et al. | Switching sampling power meter for frequencies up to 1 MHz | |
| CN117691974A (en) | Voltage frequency conversion method and device based on Beidou satellite clock synchronization | |
| CN211348608U (en) | Calibration system of analog input type electronic transformer calibrator | |
| CN116819425A (en) | Remote calibration system and calibration method for charging pile | |
| CN214845733U (en) | Remote calibration system for voltage source | |
| CN111562537A (en) | Synchronous measurement method for dynamic errors of electric energy meter | |
| Zhang et al. | A new method for measuring the level dependence of ac shunts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |