News - PV Solar Energy Meter Module

As photovoltaic grid connection and energy storage construction become more and more common, many customers are consulting about two-way metering. Many users may not have noticed that JSY-MK Technology's current three-phase embedded metering module not only supports two-way metering but also supports two-way backflow prevention.

Bidirectional metering capability: Why is it important?

The photovoltaic grid-connected system involves the bidirectional flow of electric energy, and the traditional one-way meter cannot meet the demand for accurate measurement. The three-phase embedded metering module can measure the power consumption and power generation at the same time, ensuring accurate power measurement and avoiding measurement errors and disputes.

When the photovoltaic grid-connected system transmits electricity to the grid, it may generate harmonic pollution and affect the power quality of the grid. The three-phase embedded metering module can monitor the grid signal in real time, adjust the power generation, and realize the anti-reverse flow function, which is conducive to the safe and stable operation of the grid.

Using a three-phase embedded metering module to replace two single-phase meters can reduce costs, simplify construction difficulty, and facilitate maintenance and use. Only one meter is needed to achieve separate metering of the power fed into the grid and the power consumed by the grid.

To achieve accurate measurement of photovoltaic grid connection and energy storage, a series of advanced technical means or equipment support are needed. The following are several key technologies of three-phase embedded metering module in photovoltaic metering.

The three-phase embedded metering module uses a dedicated measurement chip and 24-bit AD sampling technology to ensure that the measurement of electrical parameters such as voltage, current, power, and electric energy is high-precision, with an error within ±1.0%. This is crucial for the bidirectional measurement of electric energy in photovoltaic grid-connected systems, and can avoid measurement errors and disputes caused by them.

The module not only supports bidirectional measurement of electric energy, but also has a built-in anti-reverse flow function. By real-time monitoring of grid signals, when the harmonics generated by the photovoltaic system transmitting power to the grid may pollute the grid and affect the quality of electric energy, the photovoltaic inverter can adjust the grid-connected power according to the data of the metering module, complete the anti-reverse flow, and ensure the safe and stable operation of the grid. This function is of great significance for the safe operation of photovoltaic grid-connected systems.

The JSY-MK-333 module provides a wide range of power supply options, supporting DC3.3V or DC5~12V power supply, to meet the power supply requirements in different scenarios. At the same time, the module has built-in 1 RS485 communication interface and 1 TTL interface. The communication protocol adopts standard Modbus-RTU, which has good compatibility and is convenient for connecting with various AMR systems to realize remote monitoring and data acquisition.

The meter module has built-in Modbus registers, which can store and read various electrical parameter data. The data of electricity is stored in the form of 4-byte unsigned numbers, which will not overflow for 10 consecutive years, and the data can be saved even when the power is off. This provides users with long-term and reliable data support, which is convenient for real-time monitoring and analysis of the operating status of the photovoltaic system.

Users can change and set product parameters such as communication address, baud rate, data format, etc. through the three-phase embedded metering module product test software. At the same time, the module provides detailed terminal definitions and typical wiring diagrams to facilitate users to perform correct wiring and debugging. This makes the module more flexible and convenient during installation, use and maintenance.

The three-phase embedded metering module uses industrial-grade chips, built-in watchdogs, and has perfect lightning protection and anti-interference measures. These measures can effectively prevent the impact of external factors such as lightning and electromagnetic interference on the module, ensuring the stable operation of the module in harsh environments.