Avon EAS1 Control and Fuel System Upgrade in Australia

Nov 29, 2019

Greenray have recently completed the commissioning of an EAS1 Control and Fuel System upgrade for a fossil fuelled power station in Queensland, Australia. Working closely with the customer since 2018, Greenray have designed and installed a locally built version of our bespoke three bay combined turbine and generator control panel, replacing the original GEC five bay analogue system installed in 1983. Onsite training was also delivered for control panel operation and maintenance. The gas generator, the new bespoke control panel and panel interior are shown.

The upgrade has provided a Safety Integrity Level 2 (SIL 2), from a previously unrated system. This has been accomplished with the use of the latest detection devices and duplex 24 V dc SIL 2 fuel shutoff valves. Throughout the project, Greenray worked to IEC 61508 Standards and to meet local compliance, all electrical installations adhered to the requirements of AS/NZ 3000:2018.

Greenray replaced the old battery charger with a new, state of the art purpose-built unit. A new Greenray dual redundant EGT harness and replacement analogue transmitters provide the customer with enhanced reliability of the turbine. The harness is a first for Greenray, which gives the End User continued running in the event of a thermocouple failure. This type of failure would normally cause a shutdown, but with this harness, the gas turbine can continue to operate, and the faulty thermocouple can be replaced during scheduled maintenance.

Innovative design resulted in reduced component count and allowed the generator control panel to be incorporated within the turbine control panel and thus provided a simpler panel layout. Front and rear panel entry gives maintenance personnel ease of access to all components in the panel.

The new Operator controls are via a single 21” wide HMI (human machine interface) touch screen panel. An offsite secure login facility provides a remote assist capability from the Greenray offices.

Meeting the challenges of working remotely with the customer and using local expertise, Greenray have proved their capabilities in this challenging and competitive market, a great job all round, well done guys!

We had some great feedback from the End Users technical consultant:

“The control system HMI interface is really neat, looks better than some new build GT control systems. I was also impressed with your attention to detail on matters both electrical, I&C and even mechanical.”