GE Energy Highlights Turbine Control Mitigation

GE Energy is to showcase its Mark IV and Mark V control mitigation solutions designed to improve turbine performance, operability and availability at the 7EA Users Group Annual Conference in October. To minimise risk, cost and downtime, GE's migrations upgrade Mark IV and Mark V control systems to the latest Mark VIe through replacement of critical and obsolete technology only. All existing turbine devices and wiring terminations remain.

Upgrading to the Mark VIe system is said to provide increased computing power, which enables many features and algorithms for new turbine functions, such as advanced Dry Low NOx systems and operational flexibility (Opflex) enhancements. Opflex is a suite of software solutions that increases user flexibility, speed and efficiency in turbine control. This upgrade provides a complete modernisation of operator stations and networks to current technology. Additional upgrade features and benefits include: minimised cost and installation time; eliminates the need for new field termination and turbine devices, reducing downtime; elimination of out-of-production technologies; solves the problem of difficult-to-obtain spare parts.

The fully distributable and scalable system offers ease-of-operation with improved graphics, alarm/event management, trending and more. Up-to-date I/O capability allows adding and distributing Mark VIe I/O blocks - locally or remotely - and communication via modern, high-speed networks at all levels with Ethernet client/server capability. It provides redundant communications within the control and options for network redundancy between controls and HMIs.

One modern software tool configures networks, processors, and I/O boards, along with editors, block libraries and diagnostics. It is compatible with current programs for compliance with cyber-security standards, maintenance programs, and remote monitoring and diagnostics. Complete unit network integration with other Mark VI, Mark VIe, and EX2100 systems used for turbine control, plant control (DCS), generator control, and safety systems.

Integration with third-party plant DCS systems is also standard. Above all, this upgrade gives plants a clear path for future enhancements and lifecycle support, allowing increased reliability, stability, and operational flexibility of the plant's turbine generator. In addition, this provides an opportunity to install an EX2100 digital front end during the same short outage to modernise aging generator excitation controls.

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