ACREL ACR10R-D Series Anti-Backflow Energy Meter in Photovoltaic Grid-Connected Systems

With the widespread adoption of photovoltaic (PV) power generation systems, effectively managing power generation and preventing power backflow into the grid have become critical issues. The ACR10R-D anti-backflow energy meter from ACREL, with its exceptional technical advantages, plays an important role in grid-connected PV systems. This article will delve into the applications of the ACR10R-D anti-backflow energy meter and its crucial functions in preventing backflow.

Applications of the ACR10R-D Anti-Backflow Energy Meter in PV Systems

In modern PV power generation systems, preventing excess power from backflowing to the public grid is essential. The ACR10R-D anti-backflow energy meter from ACREL is specifically designed for this purpose. It not only monitors the power flow in the grid in real-time but also works in conjunction with inverters. Through the RS485 interface, it adjusts the inverter's output power in real-time to prevent PV power backflow.

ACR10R-D anti-backflow energy meters conduct precise power monitoring. When they detect power backflow, they can send control signals to the inverter through the 485 communication module, instructing the inverter to reduce the output power until the backflow current is zero. This process is automatic, ensuring that the PV system operates efficiently without imposing burdens on the grid.

Functional Features of the ACR10R-D Anti-Backflow Energy Meter

ACR10R-D anti-backflow energy meters not only prevent power backflow but also offer various measurement and monitoring functions. They can measure voltage, current, active power, reactive power, power factor, and total harmonic distortion across multiple electrical configurations, including three-phase four-wire, three-phase three-wire, and single-phase systems. These functionalities allow the ACR10R-D meter to comprehensively monitor the operation of PV systems, providing precise data support for optimized power management.

Its modular design makes it easy to install and it can be directly mounted on a DIN35mm standard rail, perfectly matching with miniature circuit breakers. Through the RS485 interface, the ACR10R-D anti-backflow energy meter can also transmit data to a data management system, enabling remote monitoring and adjustment, significantly enhancing the operation and maintenance efficiency of PV systems.

How Do ACR10R-D Meters Prevent Power Backflow

When the power generation of a PV system exceeds the local load demand, the excess power may backflow into the public grid. This backflow can cause harmonic pollution, affect the stability of the grid voltage, and even pose safety risks. Therefore, anti-backflow devices are particularly important in grid-connected PV systems.

ACR10R-D anti-backflow energy meters are installed at the grid connection point to monitor power flow in real-time. When the meter detects reverse current, it immediately sends a signal to the inverter through the RS485 communication module, instructing it to reduce the generation power. The inverter then gradually reduces the output based on the feedback from the meter until the power backflow reaches zero, effectively preventing excess power from backflowing into the grid.

This mechanism is particularly suitable for grid-connected control of PV systems. It can automatically adjust the system's generation based on real-time power changes, ensuring the stable operation of PV systems while avoiding interference with the grid.

For PV systems with higher power capacity, a single machine anti-backflow solution often fails to meet the demand. At this point, a multi-machine anti-backflow solution becomes the best choice. In this solution, ACR10R-D anti-backflow energy meter can connect multiple inverters through the RS485 bus, monitoring the power flow in the grid in real-time. Through a central data collector or communication management unit, the ACR10R-D anti-backflow energy meter can synchronously control the output power of multiple inverters, ensuring that the total generation of the PV system matches the load demand and preventing power backflow.