Rockwell solves trouble at mill

International Paper has selected Rockwell Automation to implement a power demand management system at its Riegelwood, NC paper mill.

The Rockwell Automation Power and Energy Management Solution (PEMS) will help International Paper eliminate power blackouts caused by fluctuations in power supply levels.

Each blackout at International Paper can result in hundreds of thousands of dollars in lost production and equipment damage. The company anticipates that its investment in PEMS will pay for itself by preventing a single power outage.

‘With each blackout costing us so much in repairs and/or lost revenues, one blackout a year was devastating,’ explained Dwight Collins, PE, Process Control Engineering Team Leader, International Paper. ‘We realised that the current antiquated load shed system needed to be replaced with a system that would provide us with enhanced security against power level fluctuations and blackout situations.’

Rockwell Automation will provide an integrated PEMS with power monitoring and load shedding capabilities that will help the plant avoid facility-wide shutdowns due to power failure. The PEMS load shedding capability balances the power supply and draws additional power from on-site power generators or the local utility, as needed.

Rockwell Automation provided a similar solution to International Paper for its Mansfield, LA, plant in 1999.

At the core of the International Paper solution is a network of Allen-Bradley Powermonitor 3000 power meters, Allen-Bradley Powermonitor II power meters, Allen-Bradley PLC5 programmable controllers, and Rockwell Software RSPower32 energy management software.

Located on plant floor machinery, the Allen-Bradley Powermonitor 3000 and Powermonitor II allows facility engineers to monitor and collect energy usage information and help achieve proactive demand management.

The voltage, power, and other electrical data collected from the plant floor is then communicated to a central PLC5 controller, which monitors and controls energy consumption plant-wide and provides operators with an overview of the power distribution status using RSPower32 software. The system also includes Rockwell Automation’s monitoring hardware, I/O and communication modules.

Rockwell Automation expects to complete installation of the PEMS system for International Paper by the end of the first quarter 2001.

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