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New ABB Grid Feeding Monitoring Relay with Modbus RTU Guarantees Grid Stability

Source: www.gulfoilandgas.com 11/30/2017, Location: Africa

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ABB has launched a new grid feeding monitoring relay with a communication interface that enables users to visualize 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 stabilize 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.

“ABB is a market leader in smart grid technologies with intelligent products that take energy management to the next level,” said Julian Gress, global product manager for Electronic Products and Relays in ABB’s Protection and Connection business. “The CM-UFD.M*M range with Modbus RTU is up to 60 percent faster to install and commission than alternatives and can reduce downtime by up to 70 percent. We expect the unit to become the first choice for renewable generators connected to low-voltage grids.”

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 stabilize.

The CM-UFD.M*M range can also detect “islanding”, the loss of mains power, and can shut down community generators to prevent variations in the frequency and voltage that can damage electrical devices and endanger electrical utility workers.

Simple instructions, presets for local grid feeding standards, and ABB’s intuitive menu structure make installation fast and error-free. And, with remote operation, users receive immediate alerts when the grid disconnects, reducing downtime by up to 60 percent.

ABB’s CM-UFD.M*M relays with Modbus RTU provide a range of monitoring functions. The units detect over- and under-voltage as well as any changes in grid frequency. Rate of change of frequency (ROCOF) monitoring is easily configured.

ABB offers four different versions that meet all the main international standards.

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