The energy meter is one of the basic devices of the smart grid (especially smart distribution network) data acquisition, which is responsible for the task of raw energy data acquisition, measurement, and transmission, is the basis for implementing information integration, analyzing optimization and information. In addition to the measurement function of the traditional power gauge, the smart meter has a two-way multi-rate metering function, the user-end control function, two-way data transmission mode for adapting to the intelligent grid and new energy. Intelligent functions such as function, anti-effort. The importance of all kinds of electric meters does not have to say more, today give everyone 10 meter-related design, and give a reference to a friend of interest.
1, [Open Source] smart meter DC power supply and power consumption real-time monitoring system
With the development of technology, digital, electronic types of electronic types all the corners, and these digital products need to have a DC power supply, the traditional power supply is generally converted to DC, and then directly supply equipment, most of them After protective measures, such as overcurrent or overwhelming, short circuit protection, and unclear the actual power consumption of the device, it is not clear to power consumption. And it is not possible to automatically open the device, often only need to operate at a certain period of time, but because forgetting the power or inconvenient to turn off, unnecessary electricity is also wasted.
Design intelligent DC power and power consumption tables, solve many power supply protection issues, and timing switch issues. Provide more protection for the equipment, more intelligence, more intelligence to understand the power consumption of the device in real time to know that it is the maximum or smallest power consumption in that case.
http://www.cirmall.com/circuit/4778/details
2, high-precision three-phase electric meter solution based on 24-bit AFE
The three-phase meter reference is designed to provide an application example for the three-phase meter using the Kinetis M Series MCU. With the increasing energy consumption in global, in particular residential markets, power companies need more high precision and cost-effective electric meter solutions. The three-phase meter reference design provides a high-performance analog front end (24-bit AFE), combined with an embedded programmable gain amplifier (PGA), increasing the energy metering accuracy, and also implements a cost-effective shunt sensing circuit. And the material list (BOM) is low, and the double demand for accuracy and cost is met.
http://www.cirmall.com/circuit/4672/details
3, six semi-digital handheld meter solutions (schematic + design description, etc.)
3.0V ~ 6V power supply can be used in single-cell phosphate (3.2V), single-cell acid (3.7V), lithium monatomanate (3.6V), three alkaline batteries (4.5V), three nickel bad or nickel Hydrogen batteries (3.6V), power consumption 250MW (turn on data saving), 2.9V low voltage shutdown (to protect lithium electricity avoidance over discharge), software power switch, standby current. 1881.5ua.
http://www.cirmall.com/circuit/4365/details
4, high precision, low cost, two-phase electric meter design (hardware + software + design description)
This design achieves a low cost two-phase electric meter system. This dual chip solution has a metering processor for calculating metering parameters, and there is another host MCU to drive onboard LCDs, additional communication modules, and USB devices. Isolation communication between metrology and host MCU is supported by the onboard isolator.
http://www.cirmall.com/circuit/4262/details
5, based on the ADE7953 single-phase meter metering chip calibration host code + test code + application notes
The ADE7953 is a high precision energy metering IC, mainly used in single-phase applications. It can measure line voltage and current and calculate active, reactive, depending on power, and instantaneous root voltage and current. It can measure a variety of power, including active, reactive, and power, and provide current and voltage root reading. Also provide a variety of electrical energy detection functions, including measurements without load, reverse power, and also include direct power factor measurements. The ADE7953 can be accessed via SPI, I2 C, and UART interfaces.
http://www.cirmall.com/circuit/2285/details
6, smart meter design, with prototype, source code, material list, design instructions
The smart meter control chip uses NXP LPC1114, using the Adi ADE7757 high-precision power measurement integrated chip, using LCD1602 display. The first line shows the welcome interface, the second line of 5 digits display pulses, and the 5-bit display power value is displayed. The count pulse is 1 per 1600.
The electric energy meter is composed of three blocks: the ADE7757 power metering circuit module section, the LPC1114 master part, the power supply section.
ADE7757 Electrical Power Module Part: The voltage output of the current current sensor can be accessed from the channel V1 to the ADE7757 chip. Channel V1 is a full differential voltage input channel, and V1p is a positive electrode input, and V1N is an negative input. The voltage output of the voltage sensor is connected by the channel V2 to the ADE7757 chip. Channel V2 is also a full-differential voltage input channel, and V2P is a positive electrode input, V2N is an negative electrode input, and its maximum differential signal is ± 165mV.
http://www.cirmall.com/circuit/2120/details
7. Advanced metrology system 3G smart meter system - Database & Sql Blog Articles
In response to the current intelligent meter, the data transmission rate is low, and the power user, the electricity, the electricity and the power company are not effectively achieved, the data real-time interaction between the three people, and proposes the Internet, 3G wireless communication, WiFi wireless communication, GPS positioning and database Management and other technologies have design a new IPT 3G smart meter system.
http://www.cirmall.com/circuit/1554/details
8, based on STM32 single-chip smart meter wireless WiFi socket APP AC voltage current detection design [graduation design]
This design consists of STM32 single-chip core board circuit + AC voltage current detection module circuit + WiFi module circuit + indicator circuit.
1. The AC voltage and AC current value are detected by voltage transformer TV1005M and current transformers TA1005M, respectively.
2, after the mobile phone app is interconnected, the AC voltage, AC current, power, and power is displayed on the phone in real time.
3. When the power exceeds 200W, the relay is automatically disconnected. When the power does not exceed 200W, the switch of the relay can be manually controlled.
4, after the mobile phone and WiFi module are connected, the timing is displayed on the phone.
https://www.cirmall.com/circuit/14578
9, intelligent single-phase electric meter reference design
This project is launched by the intelligent single-phase meter reference design of ST. The smart meter is based on the STPM10 meter chip and STM8L152C6 microcontroller, built-in M24LR64 dual interface EEPROM memory. This is a full-featured single-phase meter solution, equipped with parameter displays, power meter tamper management, maximum demand (MD) computing, dual interface (RF), and integrated circuit interconnect (I2C)) EEPROM data records and low work Work management. The data of the smart meter dual interface EEPROM memory can also be read by the RFID card reader.
https://www.cirmall.com/circuit/8819
10, three-phase multi-function electric meter circuit schematic + source code + design description, etc.
The main function of the three-phase multi-functional meter (detailed design analysis is detailed in the attachment content):
Energy calculation: Positive reverse active powerless power calculation; large power storage: can store positive reverse active powerless power; measurement function: measurement voltage, current, instantaneous energy and frequency; replacement rate: including 4 rates According to different time periods; time calibration function: can be calibrated by broadcasting and programming; programming capability: programming capability can be controlled by pressing the button; communication function: The project includes two communication methods of infrared and RS485; cyclic display function: Display data by pressing the button; read and fundamental and harmonic information.
http://www.cirmall.com/circuit/4348/details
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