New ABB grid feeding monitoring relay with Modbus RTU guarantees grid stability
ABB has launched a new grid feeding monitoring relay with a communication interface that enables users to visualise and store process data remotely, and to perform remote tripping, monitoring and maintenance analysis.
The ABB innovation helps overcome challenges that arise because power grids are not equipped for large-scale energy storage. To keep the power generated and the power consumed equal at all times, renewable energy sources must connect and disconnect to stabilise the grid.
The fluctuations that renewable energy sources bring to power grids make the challenge more complex. Changes in the weather can lead to sudden power increases in the grid that can increase the mains frequency and the risk of a blackout.
ABB’s intelligent CM-UFD.M*M relay, with Modbus RTU, measures the grid frequency and manages the feed-in process, guaranteeing grid stability to prevent blackouts and protect electrical equipment.
The CM-UFD.M*M with Modbus RTU is a range of high-performance, multifunctional grid feeding monitoring relays, which are installed between the renewables and the grid. If the public grid’s voltage or frequency moves out of permitted ranges, ABB’s system immediately uses a decoupling unit – a contactor or Tmax XT circuit breaker – to separate the renewable energy system from the public grid. It then automatically reconnects as soon as conditions stabilise.