Ovation Controls And Monitors I/O Points At Plant

Emerson Process Management has received two contracts to modernise controls at the Ekibastuz Gres-1 thermal power plant with its Plantweb digital plant architecture and Ovation expert control system. The 4,000MW plant is the largest in Kazakhstan, producing 13 per cent of the country's power. The modernisation project will help ensure the plant is operating efficiently so that it is better able to meet Kazakhstan's growing electricity demands.

Under the first contract, Emerson will modernise the controls for the steam turbine and turbine drives for feedwater pumps at six 500MW units (Units 3-8). Emerson's Ovation technology will monitor and control the Turboatom turbines at two of the units and LMZ turbines at the other four, as well as two KTZ turbine drives for feedwater pumps at each unit. The contract also includes retrofitting the turbine protection system and turbine DEH (digital electro hydraulic) system.

The controls upgrade for two of the units will be completed in 2010, and the other four will be finished in 2011-2012. Utilising a single Ovation platform to control equipment supplied by different turbine manufacturers will help Ekibastuz Gres-1 streamline operations and improve overall efficiency by reducing the need for training and spare parts.

Operators at the plant are also already familiar with the Ovation system because Emerson has previously upgraded other controls at Units 3-7. Under the second contract, Emerson will digitally automate all major equipment and processes, including unit co-ordinator and start-up and shut-down sequencing at Unit 8. Co-ordinated control not only enhances unit-wide compatibility, but also contributes to improved unit stability, responsiveness and thermal efficiencies, tighter overall control of plant operations, and a more streamlined view of key plant and turbine parameters.

In all, Ovation will monitor and control 5,000 I/O points at this unit, which is scheduled to return to service in 2012. Over the next five years, Ekibastuz Gres-1 also plans to expand the scope of Ovation's control at Units 3-7 to provide unit co-ordinated control and opportunities for additional process optimisation. One of the reasons Emerson was selected for these two projects was its successful performance on control upgrades at Units 3-7 over the last six years.

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