CN112649665A - Integrated high-voltage direct-current electric energy meter - Google Patents
Integrated high-voltage direct-current electric energy meter Download PDFInfo
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- G01—MEASURING; TESTING
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- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/08—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using analogue techniques
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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Abstract
The embodiment of the application discloses integral type high voltage direct current electric energy meter, load signal pass through direct current heavy current measurement module and direct current heavy voltage measurement module converts analog signal into, and digital output conversion module converts analog signal into digital signal, and synchronous sampling trigger module sends synchronous sampling pulse instruction to digital output conversion module to control digital signal's synchronous conversion and output, digital signal processing module carries out digital processing with digital signal to convert analog signal once more, at last, direct current electric energy metering module measures the result. The application solves the problems that in the prior art, a plurality of split devices are often combined into a system to perform direct current measurement, a merging unit and a remote module need to be subjected to digital processing, the process can bring delay, the asynchronism of voltage and current signal transmission is caused, errors are brought to an electric energy measurement result, the real-time synchronous transmission of voltage and current signals is ensured, and the delay possibility is reduced.
Description
Technical Field
The application relates to the technical field of power measurement, in particular to an integrated high-voltage direct-current electric energy meter.
Background
The direct current, also called constant current, does not change with time in both magnitude and direction. The application range of direct current is very wide, and the direct current exists in a direct current distribution network. The direct current distribution network provides direct current for loads, and in practical application, an integrated direct current electric energy meter is usually adopted to measure load voltage and load current in the direct current distribution network.
The direct current voltage of traditional integral type direct current electric energy meter access does not exceed 1000V usually, to being higher than 1000V direct current transmission line, adopts a plurality of components of a whole that can function independently equipment such as electronic voltage transformer, electronic current transformer, merging cells, digital electric energy meter, far-end module to make up into a system and carry out the direct current measurement usually. The electronic voltage transformer and the electronic current transformer collect load voltage and load current in the direct-current power distribution network, digital quantity conversion and digital processing are carried out through the merging unit, the processed load voltage and load current are transmitted to the digital electric energy meter to be measured, and finally, digital processing is carried out again through the remote end module and a measuring result is output.
In the prior art, a plurality of split devices such as an electronic voltage transformer, an electronic current transformer, a merging unit, a digital electric energy meter and a remote module are combined into a system for direct current measurement, wherein the merging unit and the remote module need to be subjected to digital processing, and the process can cause time delay, so that asynchronous voltage and current signal transmission is caused, and errors are brought to electric energy measurement results.
Disclosure of Invention
In order to solve the problem that in the prior art, a plurality of split devices are combined to form a system to perform direct current measurement, wherein a merging unit and a remote module need to be subjected to digital processing, delay is caused in the process, the voltage and current signal transmission is asynchronous, and errors are caused in an electric energy measurement result, the application discloses an integrated high-voltage direct current electric energy meter through the following embodiments.
The application discloses integral type high voltage direct current electric energy meter, integral type high voltage direct current electric energy meter includes: the device comprises a terminal module, a direct current large current measuring module, a direct current large voltage measuring module, a synchronous acquisition triggering module, a digital quantity output conversion module, a digital signal processing module, a direct current electric energy metering module and a control module, wherein the control module is used for controlling each module;
the terminal module is respectively connected with the input end of the direct current large current measuring module and the input end of the direct current large voltage measuring module, the load current is connected into the direct current large current measuring module through the terminal module, and the load voltage is connected into the direct current large voltage measuring module through the terminal module;
the direct current large current measuring module is used for converting the load current into a first analog current signal, and the direct current large voltage measuring module is used for converting the load voltage into a first analog voltage signal;
the input end of the digital quantity output conversion module is respectively connected to the output end of the direct current large current measurement module and the output end of the direct current large voltage measurement module, and the digital quantity output conversion module is used for respectively converting the first analog current signal and the first analog voltage signal into a digital current signal and a digital voltage signal according to a preset communication protocol;
the synchronous sampling trigger module is connected with the digital quantity output conversion module and is used for sending a synchronous sampling pulse instruction to the digital quantity output conversion module so as to control the digital quantity output conversion module to synchronously convert and output the digital current signal and the digital voltage signal;
the input end of the digital signal processing module is connected to the output end of the digital quantity output conversion module, and the digital signal processing module is used for carrying out digital processing on the digital current signal and the digital voltage signal according to the preset communication protocol and respectively converting the processed digital current signal and digital voltage signal into a second analog current signal and a second analog voltage signal;
the direct current electric energy metering module is connected with the output end of the digital signal processing module and used for metering the second analog current signal and the second analog voltage signal and acquiring a metering result.
Optionally, the terminal module includes a first terminal, a second terminal, a third terminal, and a fourth terminal;
the load current is connected to the direct current large current measuring module through the first terminal and the second terminal, and the first terminal and the second terminal are both connected with the high potential of the direct current large current measuring module;
the load voltage is connected to the direct current large voltage measuring module through the third terminal and the fourth terminal, the third terminal is connected with the low potential of the direct current large voltage measuring module, and the fourth terminal is connected with the high potential of the direct current large voltage measuring module.
Optionally, the first terminal and the second terminal are connected in series to the dc large current measurement module, and the third terminal and the fourth terminal are connected in parallel to the dc large voltage measurement module;
when the integrated high-voltage direct-current electric energy meter is in a normal working state, the first terminal is connected with the fourth terminal, and the load current is input from the first terminal or the fourth terminal and output from the second terminal;
when the integrated high-voltage direct current is in a verification state, the first terminal and the fourth terminal are disconnected.
Optionally, the digital output conversion module includes a first digital output conversion module and a second digital output conversion module;
the input end of the first digital output conversion module is connected with the output end of the direct current large current measurement module, and the first digital output conversion module is used for converting the first analog current signal into a digital current signal according to a preset communication protocol;
the input end of the second digital quantity output conversion module is connected with the output end of the direct current large voltage measurement module; the second digital quantity output conversion module is used for converting the first analog voltage signal into a digital voltage signal according to a preset communication protocol.
Optionally, the integrated high-voltage direct-current electric energy meter further comprises a display module, and the display module is connected with the output end of the direct-current electric energy metering module and is used for displaying the metering result obtained by the direct-current electric energy metering module.
Optionally, the integrated high-voltage direct-current electric energy meter further includes a pulse output module, and the pulse output module is configured to verify the integrated high-voltage direct-current electric energy meter and feed back electric energy consumed by the integrated high-voltage direct-current electric energy meter and a pulse per second signal of an internal clock of the integrated high-voltage direct-current electric energy meter.
Optionally, the integrated high-voltage direct-current electric energy meter further includes a power supply module, and the power supply module acquires electric energy from the direct-current large-voltage measurement module or acquires electric energy in an optical fiber transmission energy supply manner, so as to supply power to the integrated high-voltage direct-current electric energy meter.
Optionally, the integrated high-voltage direct-current electric energy meter further comprises a storage module, and the storage module is used for storing electric energy data of the integrated high-voltage direct-current electric energy meter in an electric energy register.
Optionally, the integrated high-voltage direct-current electric energy meter further includes an external communication module, and the external communication module is configured to read or set electric energy data of the integrated high-voltage direct-current electric energy meter.
Optionally, the pulse output module, the power supply module storage module and the external communication module are all connected to the control module.
The embodiment of the application discloses integral type high voltage direct current electric energy meter, integral type high voltage direct current electric energy meter includes: the device comprises a terminal module, a direct current large current measuring module, a direct current large voltage measuring module, a synchronous acquisition triggering module, a digital quantity output conversion module, a digital signal processing module, a direct current electric energy metering module and a control module, wherein the control module is used for controlling each module. The load current is accessed to the direct current heavy current measuring module through the terminal module and converted into a first analog current signal, the load voltage is accessed to the direct current heavy voltage measuring module through the terminal module and converted into a first analog voltage signal, the digital quantity output conversion module converts the first analog current signal and the first analog voltage signal into a digital current signal and a digital voltage signal respectively, the synchronous sampling trigger module sends a synchronous sampling pulse instruction to the digital quantity output conversion module to control the digital quantity output conversion module to synchronously convert and output the digital current signal and the digital voltage signal, the digital signal processing module carries out digital processing on the digital current signal and the digital voltage signal and converts the processed digital current signal and digital voltage signal into a second analog current signal and a second analog voltage signal respectively, and the direct current electric energy metering module meters the second analog current signal and the second analog voltage signal and acquires a metering result. The integrated high-voltage direct-current electric energy meter solves the problem that in the prior art, a plurality of split devices are combined into a system to perform direct-current metering, wherein a merging unit and a remote module are required to be subjected to digital processing, delay is caused in the process, and the voltage and current signal transmission is asynchronous, so that errors are caused to the electric energy metering result, only one-time digital processing is required to be performed in a digital signal processing module, and before one-time digital processing is performed, a synchronous sampling trigger module sends a synchronous sampling pulse instruction to a digital quantity output conversion module to control the digital quantity output conversion module to synchronously convert and output a digital current signal and a digital voltage signal, so that the real-time synchronous transmission of the voltage and current signals is ensured, the delay possibility is reduced, and the existing split electric energy meter has no uniform specification, the high voltage direct current electric energy meter formula structure as an organic whole that this application discloses can apply for the standard specification of production ammeter to the country as a whole to the realization is as a whole measurement utensil to the purpose of national electric energy measurement benchmark traceability, and the voltage and current of input all are analog voltage electric current, can ensure the accuracy of magnitude reliably, solves the trade settlement problem.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an integrated high-voltage direct-current electric energy meter disclosed in an embodiment of the present application;
fig. 2 is another schematic structural diagram of an integrated high-voltage direct-current electric energy meter disclosed in the embodiment of the present application.
Detailed Description
In order to solve the problem that in the prior art, a plurality of split devices are combined to form a system to perform direct current measurement, wherein a merging unit and a remote module need to be subjected to digital processing, delay is caused in the process, the voltage and current signal transmission is asynchronous, and errors are caused in an electric energy measurement result, the application discloses an integrated high-voltage direct current electric energy meter through the following embodiments.
The application discloses integral type high voltage direct current electric energy meter, refer to the structural schematic diagram that figure 1 shows, integral type high voltage direct current electric energy meter includes: the device comprises a terminal module, a direct current large current measuring module, a direct current large voltage measuring module, a synchronous acquisition triggering module, a digital quantity output conversion module, a digital signal processing module, a direct current electric energy metering module and a control module, wherein the control module is used for controlling each module.
The terminal module is respectively connected with the input end of the direct current large current measuring module and the input end of the direct current large voltage measuring module, load current is connected into the direct current large current measuring module through the terminal module, and load voltage is connected into the direct current large voltage measuring module through the terminal module.
Further, referring to the schematic structural diagram shown in fig. 2, the terminal module includes a first terminal, a second terminal, a third terminal, and a fourth terminal.
The load current is connected to the direct current large current measuring module through the first terminal and the second terminal, and the first terminal and the second terminal are both connected with the high potential of the direct current large current measuring module.
The load voltage is connected to the direct current large voltage measuring module through the third terminal and the fourth terminal, the third terminal is connected with the low potential of the direct current large voltage measuring module, and the fourth terminal is connected with the high potential of the direct current large voltage measuring module.
Specifically, because in current split type measurement scheme, the current measurement unit design is at the high potential, the voltage measurement unit design is at the low potential, its insulation design has increased a large amount of equipment cost, the insulating isolation has been done to the mode that has adopted optic fibre in the digital processing of the first time, if still make the integral type scheme with current scheme, because the product is in the same place, it is difficult to do to insulate, so this application also gets at the high potential with voltage equally, high-voltage arm resistance is little promptly, low-voltage arm resistance is big, opposite with current situation, make two way potential differences very little like this, whole device all is in the high potential, insulation design is simple, and cost is reduced.
Furthermore, the first terminal and the second terminal are connected in series to the dc large current measurement module, and the third terminal and the fourth terminal are connected in parallel to the dc large voltage measurement module.
When the integrated high-voltage direct-current electric energy meter is in a normal working state, the first terminal is connected with the fourth terminal, and the load current is input from the first terminal or the fourth terminal and output from the second terminal.
When the integrated high-voltage direct current is in a verification state, the first terminal and the fourth terminal are disconnected.
Specifically, in a normal operation state, the first terminal and the fourth terminal are connected, a load current flows in from the first terminal or the fourth terminal, and flows out from the second terminal, measuring the current of the direct current large current measuring module through a current divider in the direct current large current measuring module, scaling the current into a first analog current signal according to a fixed proportion, the voltage between the fourth terminal and the third terminal (ground potential) is measured through a resistance-capacitance voltage divider in the direct current large voltage measuring module, the first analog current signal and the first analog voltage signal are finally transmitted to the direct current electric energy metering module without distortion in an analog-digital-analog mode according to the first analog voltage signal between the fourth terminal and the third terminal after being scaled according to a fixed proportion, and performing dot multiplication on the two paths of analog signals, integrating the time, and multiplying the time by a fixed proportionality coefficient to obtain the electric energy transmitted by the direct current line.
Specifically, in the verification state, the first terminal and the fourth terminal are disconnected, the first terminal and the second terminal are connected with the direct current source in series, the third terminal and the fourth terminal are connected with the direct current voltage source in parallel, and the direct current source and the direct current voltage source are independent, so that the load voltage and the load current of the used direct current source can be very small, and the energy consumption in the verification process is saved.
The direct current large current measuring module is used for converting the load current into a first analog current signal, and the direct current large voltage measuring module is used for converting the load voltage into a first analog voltage signal.
Specifically, the direct current large current measurement module comprises a current divider, the direct current large current measurement module converts load current into a first analog current signal, the influence of heat dissipation is considered, the current divider is generally selected to have a low temperature coefficient and a stable resistance value, the voltage at two ends of the current divider is preferably 75mV, and the resistance value is divided by the voltage value.
Specifically, the large direct-current voltage measurement module comprises a resistance-capacitance voltage divider, and in consideration of insulation design factors of the integrated high-voltage direct-current electric energy meter, a high-voltage arm of the large direct-current voltage measurement module selects a small resistor and a large capacitor, a low-voltage arm selects a large resistor and a small capacitor, and parameters of the large direct-current voltage measurement module meet the requirement that the high-voltage arm resistor and the high-voltage arm capacitor are equal to the low-voltage arm resistor and the low-voltage arm capacitor, so that the large direct-current voltage measurement module can keep a constant voltage division ratio for different frequency signals, the voltage division ratio is equal to (the high-voltage arm resistor and the low-voltage arm resistor)/the high-voltage arm capacitor, the high-voltage arm resistor is preferably 40 kilohms, the high-voltage arm capacitor is preferably 4 microfarads, and the voltage division ratio is preferably rated direct.
It should be noted that the dc large current measurement module and the dc large voltage measurement module are not limited to the shunt and the rc divider, but also include other measurement components capable of measuring the first analog current signal and the first analog voltage signal.
The input end of the digital quantity output conversion module is respectively connected to the output end of the direct current large current measurement module and the output end of the direct current large voltage measurement module, and the digital quantity output conversion module is used for respectively converting the first analog current signal and the first analog voltage signal into a digital current signal and a digital voltage signal according to a preset communication protocol.
Specifically, the preset communication protocol has a time tick marking function for synchronizing the first analog current signal and the first analog voltage signal, and can synchronously convert the first analog current signal and the first analog voltage signal into a digital current signal and a digital voltage signal, so that real-time synchronous conversion and transmission of the signals are ensured, and the possibility of delay is reduced.
Furthermore, the digital output conversion module comprises a first digital output conversion module and a second digital output conversion module.
The input end of the first digital output conversion module is connected with the output end of the direct current large current measurement module, and the first digital output conversion module is used for converting the first analog current signal into a digital current signal according to a preset communication protocol.
And the input end of the second digital quantity output conversion module is connected with the output end of the direct current large voltage measurement module. The second digital quantity output conversion module is used for converting the first analog voltage signal into a digital voltage signal according to a preset communication protocol.
The synchronous sampling trigger module is connected with the digital quantity output conversion module and used for sending a synchronous sampling pulse instruction to the digital quantity output conversion module so as to control the digital quantity output conversion module to synchronously convert and output the digital current signal and the digital voltage signal.
Specifically, the synchronous sampling trigger module has a sampling delay adjusting function and is controlled by the control module, a synchronous sampling pulse command is sent to the first digital quantity output conversion module and the second digital quantity output conversion module by the synchronous sampling trigger module at the same time in consideration of phase delay between the direct current large current measuring module and the direct current large voltage measuring module, the time of two paths of analog signals acquired by the two digital quantity output conversion modules is the same, when adjustment control is carried out, the phase delay of the direct current large voltage measuring module and the direct current large current measuring module before the product leaves the factory is measured respectively, if the phase delay of the direct current large voltage measuring module is larger than that of the direct current large current measuring module, the synchronous sampling trigger module triggers the AD sampling of the first digital quantity output conversion module in advance so as to ensure that the acquired analog signals reflect a first analog voltage signal and a first analog current signal at the same time, the accuracy of electric energy metering is greatly improved.
The input end of the digital signal processing module is connected to the output end of the digital quantity output conversion module, and the digital signal processing module is used for carrying out digital processing on the digital current signal and the digital voltage signal according to the preset communication protocol and respectively converting the processed digital current signal and digital voltage signal into a second analog current signal and a second analog voltage signal.
Specifically, the preset communication protocol has a synchronous time tick marking function, and can respectively convert the digital current signal and the digital voltage signal into a second analog current signal and a second analog voltage signal synchronously, so that real-time synchronous conversion and transmission of the signals are ensured, and the possibility of delay is reduced.
Specifically, the digital signal processing module converts the digital current signal and the digital voltage signal into an analog signal according to an agreed communication protocol and a time tick and sends the analog signal to the direct current power metering module for power metering, the digital signal processing module analyzes the digital current signal and the digital voltage signal according to an agreed communication protocol, converts the digital current signal and the digital voltage signal into an analog signal and sends the analog signal to the direct current power metering module for power metering, and the analog-digital-analog process is used for preventing measurement signals from being influenced by a transmission line to cause measurement errors.
The direct current electric energy metering module is connected with the output end of the digital signal processing module and used for metering the second analog current signal and the second analog voltage signal and acquiring a metering result.
The embodiment of the application discloses integral type high voltage direct current electric energy meter, integral type high voltage direct current electric energy meter includes: the device comprises a terminal module, a direct current large current measuring module, a direct current large voltage measuring module, a synchronous acquisition triggering module, a digital quantity output conversion module, a digital signal processing module, a direct current electric energy metering module and a control module, wherein the control module is used for controlling each module. The load current is accessed to the direct current heavy current measuring module through the terminal module and converted into a first analog current signal, the load voltage is accessed to the direct current heavy voltage measuring module through the terminal module and converted into a first analog voltage signal, the digital quantity output conversion module converts the first analog current signal and the first analog voltage signal into a digital current signal and a digital voltage signal respectively, the synchronous sampling trigger module sends a synchronous sampling pulse instruction to the digital quantity output conversion module to control the digital quantity output conversion module to synchronously convert and output the digital current signal and the digital voltage signal, the digital signal processing module carries out digital processing on the digital current signal and the digital voltage signal and converts the processed digital current signal and digital voltage signal into a second analog current signal and a second analog voltage signal respectively, and the direct current electric energy metering module meters the second analog current signal and the second analog voltage signal and acquires a metering result. The integrated high-voltage direct-current electric energy meter solves the problem that in the prior art, a plurality of split devices are combined into a system to perform direct-current measurement, wherein a merging unit and a remote module are required to be subjected to digital processing, and the process causes time delay and asynchronous voltage and current signal transmission and brings errors to electric energy measurement results, only one-time digital processing is required to be performed on a digital signal processing module, and before one-time digital processing, the synchronous sampling trigger module sends a synchronous sampling pulse instruction to the digital quantity output conversion module to control the digital quantity output conversion module to synchronously convert and output a digital current signal and a digital voltage signal, so that the real-time synchronous transmission of the voltage and current signal is ensured, the possibility of delay is reduced, and secondly, the high-voltage direct-current electric energy meter disclosed by the application is of an integrated structure, the electric energy meter can be used as a whole meter to trace to the national electric energy measurement reference, the input voltage and current are analog voltage and current, the accuracy and reliability of the magnitude can be ensured, and the problem of trade settlement is solved.
Furthermore, the integrated high-voltage direct-current electric energy meter further comprises a display module, and the display module is connected with the output end of the direct-current electric energy metering module and is used for displaying the metering result obtained by the direct-current electric energy metering module.
Specifically, the display module can display information such as voltage, current, power and accumulated electric energy of the current direct current line.
Furthermore, the integrated high-voltage direct-current electric energy meter also comprises a pulse output module, and the pulse output module is used for verifying the integrated high-voltage direct-current electric energy meter and feeding back the electric energy consumed by the integrated high-voltage direct-current electric energy meter and a second pulse signal of an internal clock of the integrated high-voltage direct-current electric energy meter.
Specifically, the pulse output module outputs a pulse number which is proportional to the magnitude of the accumulated electric energy, is usually used for verification, is connected to a standard device of the direct current electric energy verification device, and continuously feeds back the currently consumed electric energy in a pulse output mode, and can also be switched to a second pulse output mode, wherein the output pulse is consistent with an output signal of a built-in clock, is usually used for verification, is connected to the standard device of the direct current electric energy verification device, and continuously feeds back a second pulse signal of the internal clock in a pulse output mode.
Furthermore, the integrated high-voltage direct-current electric energy meter further comprises a power supply module, and the power supply module acquires electric energy from the direct-current large-voltage measurement module or acquires electric energy in an optical fiber transmission energy supply mode, so that the integrated high-voltage direct-current electric energy meter is powered.
Specifically, the power supply module may obtain energy from a resistor-capacitor voltage divider in the direct-current large-voltage measurement module.
Furthermore, the integrated high-voltage direct-current electric energy meter further comprises a storage module, and the storage module is used for storing electric energy data of the integrated high-voltage direct-current electric energy meter in an electric energy register.
Specifically, the storage module stores the parameter data such as electric energy in the integrated high-voltage direct-current electric energy meter in the electric energy register according to the importance level of the stored information.
Furthermore, the integrated high-voltage direct-current electric energy meter further comprises an external communication module, and the external communication module is used for reading or setting electric energy data of the integrated high-voltage direct-current electric energy meter.
Furthermore, the pulse output module, the power supply module storage module and the external communication module are all connected with the control module.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (10)
1. An integrated high voltage direct current electric energy meter, characterized in that, the integrated high voltage direct current electric energy meter includes: the device comprises a terminal module, a direct current large current measuring module, a direct current large voltage measuring module, a synchronous acquisition triggering module, a digital quantity output conversion module, a digital signal processing module, a direct current electric energy metering module and a control module, wherein the control module is used for controlling each module;
the terminal module is respectively connected with the input end of the direct current large current measuring module and the input end of the direct current large voltage measuring module, the load current is connected into the direct current large current measuring module through the terminal module, and the load voltage is connected into the direct current large voltage measuring module through the terminal module;
the direct current large current measuring module is used for converting the load current into a first analog current signal, and the direct current large voltage measuring module is used for converting the load voltage into a first analog voltage signal;
the input end of the digital quantity output conversion module is respectively connected to the output end of the direct current large current measurement module and the output end of the direct current large voltage measurement module, and the digital quantity output conversion module is used for respectively converting the first analog current signal and the first analog voltage signal into a digital current signal and a digital voltage signal according to a preset communication protocol;
the synchronous sampling trigger module is connected with the digital quantity output conversion module and is used for sending a synchronous sampling pulse instruction to the digital quantity output conversion module so as to control the digital quantity output conversion module to synchronously convert and output the digital current signal and the digital voltage signal;
the input end of the digital signal processing module is connected to the output end of the digital quantity output conversion module, and the digital signal processing module is used for carrying out digital processing on the digital current signal and the digital voltage signal according to the preset communication protocol and respectively converting the processed digital current signal and digital voltage signal into a second analog current signal and a second analog voltage signal;
the direct current electric energy metering module is connected with the output end of the digital signal processing module and used for metering the second analog current signal and the second analog voltage signal and acquiring a metering result.
2. The integrated high-voltage direct-current electric energy meter according to claim 1, wherein the terminal module comprises a first terminal, a second terminal, a third terminal and a fourth terminal;
the load current is connected to the direct current large current measuring module through the first terminal and the second terminal, and the first terminal and the second terminal are both connected with the high potential of the direct current large current measuring module;
the load voltage is connected to the direct current large voltage measuring module through the third terminal and the fourth terminal, the third terminal is connected with the low potential of the direct current large voltage measuring module, and the fourth terminal is connected with the high potential of the direct current large voltage measuring module.
3. An integrated HVDC electric energy meter according to claim 2,
the first terminal and the second terminal are connected in series to the direct current large current measuring module, and the third terminal and the fourth terminal are connected in parallel to the direct current large voltage measuring module;
when the integrated high-voltage direct-current electric energy meter is in a normal working state, the first terminal is connected with the fourth terminal, and the load current is input from the first terminal or the fourth terminal and output from the second terminal;
when the integrated high-voltage direct current is in a verification state, the first terminal and the fourth terminal are disconnected.
4. The integrated high-voltage direct-current electric energy meter according to claim 1, wherein the digital output conversion module comprises a first digital output conversion module and a second digital output conversion module;
the input end of the first digital output conversion module is connected with the output end of the direct current large current measurement module, and the first digital output conversion module is used for converting the first analog current signal into a digital current signal according to a preset communication protocol;
the input end of the second digital quantity output conversion module is connected with the output end of the direct current large voltage measurement module; the second digital quantity output conversion module is used for converting the first analog voltage signal into a digital voltage signal according to a preset communication protocol.
5. The integrated high-voltage direct-current electric energy meter according to claim 1, further comprising a display module, wherein the display module is connected with the output end of the direct-current electric energy metering module and is used for displaying the metering result obtained by the direct-current electric energy metering module.
6. The integrated high-voltage direct-current electric energy meter according to claim 1, further comprising a pulse output module, wherein the pulse output module is used for verifying the integrated high-voltage direct-current electric energy meter and feeding back electric energy consumed by the integrated high-voltage direct-current electric energy meter and a pulse per second signal of an internal clock of the integrated high-voltage direct-current electric energy meter.
7. The integrated high-voltage direct-current electric energy meter according to claim 1, further comprising a power supply module, wherein the power supply module obtains electric energy from the direct-current large-voltage measurement module or obtains electric energy through an optical fiber transmission power supply mode to supply power to the integrated high-voltage direct-current electric energy meter.
8. The integrated high voltage direct current electric energy meter according to claim 1, further comprising a storage module for storing electric energy data of the integrated high voltage direct current electric energy meter in an electric energy register.
9. The integrated high-voltage direct current electric energy meter according to claim 1, characterized by further comprising an external communication module for reading or setting electric energy data of the integrated high-voltage direct current electric energy meter.
10. The integrated high-voltage direct-current electric energy meter according to any one of claims 5 to 9, wherein the pulse output module, the power supply module storage module and the external communication module are connected with the control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110016828.6A CN112649665A (en) | 2021-01-07 | 2021-01-07 | Integrated high-voltage direct-current electric energy meter |
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| CN202110016828.6A CN112649665A (en) | 2021-01-07 | 2021-01-07 | Integrated high-voltage direct-current electric energy meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484618A (en) * | 2021-09-07 | 2021-10-08 | 湖北方圆环保科技有限公司 | Pulse amplitude acquisition device and pulse amplitude acquisition method |
| CN116008655A (en) * | 2023-02-13 | 2023-04-25 | 山东省计量科学研究院 | Electric energy metering device for measuring bidirectional DC converter |
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| CN101718856A (en) * | 2009-12-11 | 2010-06-02 | 中国电力科学研究院 | Calibration system of digital quantity input type electric energy meter |
| CN202794334U (en) * | 2012-09-21 | 2013-03-13 | 郑州三晖电气股份有限公司 | Wide-range direct current standard electric energy meter |
| CN110673083A (en) * | 2019-11-13 | 2020-01-10 | 云南电网有限责任公司电力科学研究院 | Direct current standard source device for detecting electric energy meter metering error |
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| CN101718856A (en) * | 2009-12-11 | 2010-06-02 | 中国电力科学研究院 | Calibration system of digital quantity input type electric energy meter |
| CN202794334U (en) * | 2012-09-21 | 2013-03-13 | 郑州三晖电气股份有限公司 | Wide-range direct current standard electric energy meter |
| CN110673083A (en) * | 2019-11-13 | 2020-01-10 | 云南电网有限责任公司电力科学研究院 | Direct current standard source device for detecting electric energy meter metering error |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113484618A (en) * | 2021-09-07 | 2021-10-08 | 湖北方圆环保科技有限公司 | Pulse amplitude acquisition device and pulse amplitude acquisition method |
| CN116008655A (en) * | 2023-02-13 | 2023-04-25 | 山东省计量科学研究院 | Electric energy metering device for measuring bidirectional DC converter |
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