GE Mark Controls Upgrades Fact Sheet

GE Turbine Control Fact Sheet - Mark Controls Upgrades.
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GE
Energy

Now you can upgrade your Mark* IV gas turbine control to 

GE’s latest technology, without changing your existing field

terminations, field wiring, or turbine devices. GE Energy offers a

prefabricated package to enable a seamless Mark IV to Mark VIe

migration, replacing all of the vintage electronics in the existing

Mark IV cabinet. Standard wire harnesses connect the new Mark

VIe I/O to the Mark IV terminal boards with plug-in connectors

to ensure point-to-point connectivity.

Reliability of a Modern Control System
In addition to retaining 100% of your field wiring and turbine

devices, you also retain the same control and protection philosophy

that has delivered operation and tripping reliability all these years.

Your upgraded Mark VIe control will still be triple redundant, but

with improved fault tolerance. For example, failure of an A/D

converter in the Mark IV causes one of the three controllers to

trip, but not in Mark VIe. Also, on-line repair of Mark IV systems

require that one of the three controllers be taken off-line, but the

Mark VIe can be repaired on-line.

Your board racks with hardwired backplanes are replaced with

smart I/O modules with local distributed processors to interface

with turbine devices. This eliminates berg jumpers for addressing,

PROMs to change, and BRAM/EEPROM for non-volatile memory.

I/O Enhancements
Your smart I/O modules will provide features like 1ms time-tags

for all contact inputs for Sequence of Events (SOE) monitoring.

Additionally, the SOE can be synchronized between multiple units

and to a plant time source. Flame scanners will be continuously

monitored to see the actual light intensity instead of the simple

on/off indication of the Mark IV.

Since the I/O modules are distributed via 100MB Ethernet, they

can also be located in adjacent cabinets, such as generator

protection panels to replace RTD monitors or analog meters on

the door. The “25” backup synch check relay is now a function

performed by redundant I/O modules and coordinated with

another set of modules for auto synchronizing.

Even basic power distribution is improved. For example, your Mark

IV has two feeders to isolate critical and non-critical solenoids. The

new I/O has a pair of on-board fuses to isolate every solenoid and

diagnostics to monitor their status.

Operator Interface
The operator interface on the cabinet door is replaced with a

modern HMI in the same location. Now, you have a Proficy*

HMI/SCADA CIMPLICTY* graphics package with accurate turbine

screens, convenient navigation, superior alarm management,

and tools for editing, trending, data analysis, and exporting data.

The logging printer on the door is no longer needed since alarms

are logged in the HMI. Similarly, the new Trip History handles

significantly more points, with better time resolution, and stores

data for 30 trips.

Remote operator panels and Smart Remotes can be replaced with

HMIs and Historians that communicate in client/server configuration

on modern Ethernet networks. HMIs communicate directly with

the redundant controllers, thereby eliminating the existing Mark IV

Communicator module and the need for a backup display. For units

with DCS links, a replica of the Mark IV simple data dump protocol is

available along with Modbus*, OPC, and GSM.

Mark* IV to Mark* VIe Migration
Gas Turbine Controls Upgrade

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