AMI watt-hour meter, which is advanced measurement system, is an important part of smart grid, and its hardware design is precise and powerful. Here's a breakdown of the AMI meter's hardware:

Power Module

Ami meters need a constant power supply to ensure they work properly. Because the common power supply in our life is AC 220V, but many chip's working voltage is low-voltage DC power supply, such as DC5V, DC3.3 V, etc. , the purpose of the power module is to convert the AC 220V power supply into a stable DC power supply. The common methods of step-down include resistive capacitance step-down, transformer step-down and switching power supply, etc.

Measurement module

The metering module is the core part of AMI watt-hour meter, which is responsible for the accurate metering of electric energy. This module is mainly composed of metering chip, current sampling and voltage sampling.

Metering chip: as the core component of AMI watt-hour meter, metering chip is responsible for processing the sampled current and voltage signals to obtain the consumption of electricity. The accuracy and stability of the metering chip is directly related to the accuracy of energy metering.

Current sampling: in order to convert large current into small measurable voltage signals, AMI ammeter usually uses current transformer or shunt for current sampling. These devices can accurately convert large currents in the circuit into easily processed voltage signals for subsequent processing by the metering chip.

Voltage Sampling: AMI ammeter voltage sampling is through the form of high-precision resistance voltage or voltage transformer to achieve. These devices convert high voltages into low-voltage signals in the circuit, which are also processed by the metering chip.

Storage module

The storage module is used to store all kinds of data and information produced by AMI watt-hour meter during the working process. These data include event information, load curve, charge control scheme and all kinds of power data (such as current, voltage, power, electricity, etc.) . The common memory devices are EEPROM and ferroelectric memory, which are non-volatile, high reliability and fast read-write speed, etc. .

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Control module

The control module is responsible for the control and management of the terminal power users. The control module controls the load by configuring the magnetic hold relay and so on. When the load power exceeds the set threshold, the control module can automatically cut off the power supply; when the power supply in the area is tight, the power supply can be switched on or off by time intervals to achieve the goal of orderly power consumption; In special cases, the control module can also temporarily cut off the power supply to the power user. These features enable AMI meters to play an important role in DSM.

Communication module

The communication module is a key part of the AMI meter for remote communication and data exchange. The module has the ability of two-way communication. It can transmit the meter data to the system platform (such as MDMS) , or send the instructions from the system platform to the meter. This two-way communication capability enables the power company to know the user's power consumption in real time and to manage and control it remotely. Common communication modes include RS485, Wi-Fi, WiFine, PLC, Lora, Zigbee, RF, GPRS, Ethernet, optical fiber, etc. .

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Display module

In order to facilitate users to view power consumption data, AMI meter usually uses LCD screen as display module. The module can display current, voltage, power, electricity and other power data in real time, so that users can intuitively understand their own power consumption.

MCU processor

The MCU (micro-control Unit) processor is the brain of the AMI watt-hour meter, responsible for coordinating the integration of various functional modules. According to the market demand, functional requirements can be translated into programming language and written into MCU, so that each functional module can be controlled to meet the needs of users. The stability and function diversity of MCU directly affect the performance of AMI meter.

The hardware of AMI watt-hour meter includes power module, metering module, memory module, control module, communication module, display module and MCU processor. These parts cooperate with each other to realize the functions and applications of AMI watt-hour meter in smart grid.