CN210119518U - Bidirectional metering electric energy meter - Google Patents
Bidirectional metering electric energy meter Download PDFInfo
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- CN210119518U CN210119518U CN201920928473.6U CN201920928473U CN210119518U CN 210119518 U CN210119518 U CN 210119518U CN 201920928473 U CN201920928473 U CN 201920928473U CN 210119518 U CN210119518 U CN 210119518U
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Abstract
The utility model provides a two-way measurement electric energy meter, this two-way measurement electric energy meter includes: a data processor; the integrated metering component is used for converting analog signals of current and voltage into pulse signals and transmitting the pulse signals to the data processor; the gateway side measuring component is electrically communicated with the integrated metering component and is used for acquiring analog signals of current and voltage of the gateway side; the power generation side measuring component is electrically communicated with the integrated metering component and is used for acquiring analog signals of current and voltage of the power generation side; a display for displaying data provided by the data processor; the communication component is used for sending the data provided by the data processor to the monitoring platform and the mobile equipment; and the energy supply component is used for supplying electric energy. The bidirectional metering electric energy meter can simultaneously meter various electric parameters such as active electric energy, reactive electric energy and power of a power user gateway side and a photovoltaic power generation side in a distributed photovoltaic system, has no control loop, is exquisite in structure and is completely suitable for the existing distributed grid-connected scheme in the photovoltaic industry.
Description
Technical Field
The utility model relates to a photovoltaic power generation measurement electric energy meter field is used at family, especially relates to a two-way measurement electric energy meter.
Background
When the distributed photovoltaic system is accessed to the internet by spontaneously and automatically using surplus electricity, not only the upper and lower grid electric quantity on the gateway side needs to be measured, but also the photovoltaic electric quantity on the power generation side needs to be measured simultaneously. At present, in order to measure the power generation amount on the photovoltaic power generation side and the power grid on/off on the gateway side, an electric energy meter is generally arranged on the gateway side (the meter is used for measuring the power taken by the electric power consumer from the power grid and the power grid on the photovoltaic power grid) and the power generation side respectively for measuring the power. However, two metering electric meters are adopted to count the total power consumption of the household photovoltaic project and the photovoltaic power generation amount, so that the installation cost is high, metering personnel are required to perform meter reading back and forth in use, the use is inconvenient, and the follow-up maintenance and repair are not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two-way measurement electric energy meter for look over the photovoltaic generated energy of the last lower net electric quantity and the power generation side of pass side simultaneously, two-way measurement electric energy meter includes:
a data processor;
the integrated metering component is electrically communicated with the data processor and is used for converting the analog signals of the current and the voltage into pulse signals and transmitting the pulse signals to the data processor;
the gateway side measuring component is electrically communicated with the integrated metering component and is used for acquiring analog signals of current and voltage of the gateway side;
the power generation side measuring component is electrically communicated with the integrated metering component and is used for acquiring analog signals of current and voltage of the power generation side;
a display in electrical communication with the data processor for displaying data provided by the data processor;
the communication component is electrically communicated with the data processor and is used for transmitting the data provided by the data processor to the monitoring platform and the mobile equipment;
an energy supply component in electrical communication with the integrated metering component for providing electrical energy.
In specific implementation, the bidirectional metering electric energy meter further comprises a memory, and the memory is electrically communicated with the data processor and used for storing the electric quantity and the electric charge data provided by the data processor.
In a specific implementation, the memory is an SST23VF016B memory chip.
In a specific implementation, the bidirectional metering electric energy meter further comprises a clock circuit, wherein the clock circuit is electrically communicated with the data processor and used for providing a clock signal for the data processor;
the data processor is also used for measuring the electric charge by time intervals according to the clock signal provided by the clock circuit.
In a specific implementation, the clock circuit is a DS1339 serial real-time clock chip.
In a specific implementation, the communication component includes a wired communication component and a wireless communication component.
In specific implementation, the wired communication component is an RS485 interface; the wireless communication component is one or any combination of a GPRS communication component, a 4G communication component, a WIFI communication component or a Bluetooth communication component.
In a specific implementation, the bidirectional metering electric energy meter further comprises a key-in component, and the key-in component is electrically communicated with the data processor and used for receiving key-in information and transmitting the key-in information to the data processor.
In specific implementation, the data processor is an STM32 single chip microcomputer.
In a specific implementation, the integrated metering component is a SA9105F chip.
In a specific implementation, the bidirectional metering electric energy meter further comprises a pulse output terminal, and the pulse output terminal is electrically communicated with the data processor.
The utility model provides a two-way measurement electric energy meter, including data processor and with integrated measurement part, display, communication part and the energy supply part of data processor electricity intercommunication to and respectively with the gateway side measurement unit and the electricity generation side measurement unit of integrated measurement part electricity intercommunication. The bidirectional metering electric energy meter can respectively meter various electric parameters such as active electric energy, reactive electric energy, power and the like of a gateway side and a photovoltaic power generation side of an electric power user in a distributed photovoltaic system by adopting one meter, and is equivalent to two bidirectional electric energy meters integrating the gateway side and the power generation side; meanwhile, the intelligent meter does not have a control loop, is delicate in structure and is completely suitable for the existing distributed grid-connected scheme in the photovoltaic industry.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts. In the drawings:
fig. 1 is a schematic structural diagram of a bidirectional metering electric energy meter according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of a bidirectional electric energy meter according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
As shown in fig. 1, the utility model provides a two-way measurement electric energy meter for look over the photovoltaic generated energy of the last lower net electric quantity and the power generation side of gateway side simultaneously, two-way measurement electric energy meter includes:
a data processor 100;
an integrated metering component 200 in electrical communication with the data processor 100 for converting analog signals of current and voltage into pulse signals and transmitting to the data processor 100;
a gateway-side measurement component 210 in electrical communication with the integrated metrology component 200 for acquiring analog signals of current and voltage at the gateway side;
a power generation side measurement component 220, electrically connected to the integrated metering component 200, for collecting analog signals of current and voltage at the power generation side;
a display 300 in electrical communication with the data processor 100 for displaying data provided by the data processor 100;
a communication component 400 in electrical communication with the data processor 100 for transmitting data provided by the data processor 100 to the monitoring platform and the mobile device;
an energizing component 500 in electrical communication with the integrated metering component 200 for providing electrical energy.
In particular implementations, as shown in FIG. 1, the gateway-side measurement component 210 may include a gateway-side voltage measurement component and a gateway-side current measurement component that are each in electrical communication with the integrated metering component 200, and the power generation-side measurement component 220 may include a power generation-side voltage measurement component and a power generation-side current measurement component that are each in electrical communication with the integrated metering component 200. Further, as shown in fig. 2, the gateway-side measuring unit 210 needs to be connected to a gateway-side circuit, and the power generation-side measuring unit 220 needs to be connected to a photovoltaic power generation-side circuit.
In a specific implementation, after the data processor 100 processes the data, the historical data and the current data may be stored, so that as shown in fig. 1, the bidirectional electric energy meter may further include a memory 110, where the memory 110 is electrically communicated with the data processor 100 and is used for storing the electric quantity and the electric charge data provided by the data processor 100.
Further, in consideration of the accuracy and timeliness of the data stored in the memory 110, the memory 110 of the power meter may be an SST25VF016B memory chip.
In a specific implementation, in order to perform time-sharing metering according to the rate period of the power grid, as shown in fig. 1, the bidirectional metering electric energy meter may further include a clock circuit 600, where the clock circuit 600 is electrically communicated with the data processor 100 and is used for providing a clock signal to the data processor 100; the data processor 100 is also configured to meter the electricity charges in time intervals according to the clock signal provided by the clock circuit 600.
Further, various implementations of clock circuit 600 are possible. For example, since the data processor 100 needs to store the power consumption data at a specific time and also needs to read or modify the power consumption for a certain period of time, the electric energy meter may use a DS1339 serial real-time clock chip as the clock circuit 600 to provide information of second, minute, hour, day, week, month, year, etc. to ensure the accuracy of the system time.
In particular implementations, the communication component 400 may be selected for a variety of implementations. For example, as shown in FIG. 1, the communications component 400 can include a wired communications component 410 and a wireless communications component 420.
In specific implementation, the wired communication component 410 may be selected in various embodiments, for example, the wired communication component 410 may be an RS485 interface, and the data processor 100 may upload data to a background monitoring platform through the RS485 interface; the wireless communication component 420 may also be implemented in various manners, for example, the wireless communication component 420 may be one of or any combination of a GPRS communication component, a 4G communication component, a WIFI communication component, or a bluetooth communication component, so as to effectively transmit the power and the electricity charge data to the mobile device.
In a specific implementation, in order to facilitate the meter personnel to view and select to view the electric quantity and the electric charge data on the gateway side or the power generation side, as shown in fig. 1, the bidirectional metering electric energy meter may further include a key-in component 700, where the key-in component 700 is electrically communicated with the data processor 100 and is used for receiving key-in information and transmitting the key-in information to the data processor 100.
In particular, the data processor 100 may be selected for various implementations. For example, the data processor 100 is an STM32 single chip microcomputer. In research and development, the applicant fully considers the functional requirements, development and design cost, metering precision requirements and the like of the electric energy meter, so that the STM32F103VET6 is selected as a main chip (namely, the data processor 100) and the core of the main chip is 32-bit CortexTMM3, a flash memory type program memory with 128kB and an SRAM with 20Kb, up to 80 fast I/O interfaces which can access information such as clock, reset and power supply, 2 12-bit analog-to-digital converters, 1us of conversion time (16 channels), double sampling and holding functions, and up to 9 communication interfaces, which can completely meet all precision and function requirements of the electric energy meter.
In specific implementations, the integrated metering device 200 may be selected from various embodiments, for example, the integrated metering device 200 may be a SA9105F chip. The SA9105F chip integrates the voltage and current detection, A/D converter and power calculation functions required by three-phase power/electric energy measurement, and has the function of realizing forward and reverse active power measurement. The output pulse of the chip can be only the transmission direction of energy, the pulse frequency of the chip is directly proportional to the energy consumption, and the chip can be used as a power measuring factor, and the working principle is as follows:
(1) firstly, analog signals of sampled voltage and current are respectively input into voltage and current input channels of SA9105F in a differential mode;
(2) A/D conversion is carried out on the current input signal and the voltage input signal respectively;
(3) processing the processed signal by a calculation program to obtain an instantaneous power signal;
(4) passing the instantaneous power signal through a low-pass filter with a very low cut-off frequency to obtain an instantaneous power signal;
(5) sending the instantaneous power signal to a D/A conversion module, carrying out long-time or short-time integration according to the required instantaneous power signal to obtain average energy or power consumption information, wherein the output pulse frequency is in direct proportion to the energy consumption;
(6) transmitting the processed pulse signal to the data processor 100 to finally obtain energy consumption information;
in a specific implementation, as shown in fig. 1, the bidirectional electric energy meter may further include a pulse output terminal 800, and the pulse output terminal 800 is electrically communicated with the data processor 100.
In particular implementations, the display 300 may be selected for use in a variety of embodiments. For example, the display 300 may be an LED display.
To sum up, the utility model provides a two-way measurement electric energy meter, including data processor 100 and with integrated measurement part 200, display 300, communication part 400 and energy supply part 500 of data processor 100 electricity intercommunication to and respectively with the gateway side measurement unit 210 and the electricity generation side measurement unit 220 of integrated measurement part 200 electricity intercommunication. The bidirectional metering electric energy meter can respectively meter various electric parameters such as active electric energy, reactive electric energy, power and the like of a gateway side and a photovoltaic power generation side of an electric power user in a distributed photovoltaic system by adopting one meter, and is equivalent to two bidirectional electric energy meters integrating the gateway side and the power generation side; meanwhile, the intelligent meter does not have a control loop, is delicate in structure and is completely suitable for the existing distributed grid-connected scheme in the photovoltaic industry.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A bidirectional metering electric energy meter, characterized in that it comprises:
a data processor (100);
an integrated metering component (200) in electrical communication with the data processor (100) for converting analog signals of current and voltage to pulsed signals and transmitting to the data processor (100);
a gateway-side measurement component (210) in electrical communication with the integrated metering component (200) for collecting analog signals of current and voltage at the gateway side;
the power generation side measuring component (220) is electrically communicated with the integrated metering component (200) and is used for acquiring analog signals of current and voltage of the power generation side;
a display (300), in electrical communication with the data processor (100), for displaying data provided by the data processor (100);
a communication component (400) in electrical communication with the data processor (100) for transmitting data provided by the data processor (100) to the monitoring platform and the mobile device;
an energizing component (500) in electrical communication with the integrated metering component (200) for providing electrical energy.
2. The bidirectional meter of claim 1, further comprising a memory (110), said memory (110) being in electrical communication with the data processor (100) for storing the amount of power provided by the data processor (100) and the electricity charge data.
3. The bidirectional metering electric energy meter of claim 2, wherein the memory (110) is an SST23VF016B memory chip.
4. The bidirectional metered electric energy meter of claim 1 further comprising a clock circuit (600), the clock circuit (600) being in electrical communication with the data processor (100) for providing a clock signal to the data processor (100);
the data processor (100) is also configured to meter the electricity charge in time intervals according to a clock signal provided by the clock circuit (600).
5. The bidirectional metering electric energy meter of claim 4, wherein the clock circuit (600) is a DS1339 serial real-time clock chip.
6. The bidirectional metering electric energy meter of claim 1, wherein the communication section (400) includes a wired communication section (410) and a wireless communication section (420).
7. The bidirectional metering electric energy meter of claim 6, wherein the wired communication part (410) is an RS485 interface; the wireless communication part (420) is one or any combination of a GPRS communication part, a 4G communication part, a WIFI communication part or a Bluetooth communication part.
8. The bidirectional meter of claim 1, further comprising a key-in component (700), the key-in component (700) being in electrical communication with the data processor (100) for receiving key-in information and transmitting to the data processor (100).
9. A bi-directional meter according to claim 1, characterized in that said data processor (100) is an STM32 single chip microcomputer.
10. The bidirectional metering electric energy meter of claim 1, wherein the integrated metering component (200) is an SA9105F chip.
11. The bidirectional metered electric energy meter of claim 1 further comprising a pulse output terminal (800), said pulse output terminal (800) being in electrical communication with the data processor (100).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928473.6U CN210119518U (en) | 2019-06-19 | 2019-06-19 | Bidirectional metering electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920928473.6U CN210119518U (en) | 2019-06-19 | 2019-06-19 | Bidirectional metering electric energy meter |
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| CN210119518U true CN210119518U (en) | 2020-02-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111444478A (en) * | 2020-04-13 | 2020-07-24 | 西安热工研究院有限公司 | Comprehensive plant power consumption rate statistical method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111444478A (en) * | 2020-04-13 | 2020-07-24 | 西安热工研究院有限公司 | Comprehensive plant power consumption rate statistical method |
| CN111444478B (en) * | 2020-04-13 | 2024-02-02 | 西安热工研究院有限公司 | Comprehensive plant power consumption statistics method |
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