Control.com - Nerds in Control

We are retro-fitting the existing Mark 2 DCS of a GE Frame 5 turbine with a Siemens T3000 DCS. The existing control system is quite old and plant data is not complete. We are replacing the Turbine controller, Turbine protection, AVR, synchronising unit and Gen/Transformer protection systems. I need assistance for the same.

The information required for engineering the new systems are:
1. Control Logic Sequence overview (start-up/shutdown)
2. Turbine Controller Logic overview
3. Turbine protection overview
4. Typical Input/Output lists including drives, solenoid valves, actuators etc.
5. Servo-mechanism details and calibration method
6. Start-up device operation philosophy
7. Typical control specification settings list

You may also reply to my email: kpk110170 @ yahoo. com

When you say, "We are retrofitting...", are you the owners/operators of the turbine? Or, are you associated with the control system integrator which will be doing the work?

If you are in the owners/operators group, then the information you seek should be developed by the control system integration firm that is putting together the control system package to apply to the turbine-generator.

If you are in the control system integrator group, you should have someone knowledgeable in the control, protection and operation of the Frame 5 turbine-generator and it's auxiliaries, devices and instrumentation in order to develop the philosophies and information required to control, protect and operate the turbine-generator.

All of the information you have requested is available in the typical drawings provided with a Mark II control system, with the exception of Item 2, which may just be a description of the Mark II from the Mark II manuals. The "control logic sequence overview (start-up/shutdown) would most likely be found in the Mark II Speedtronic elementary. The "turbine protection overview" would most likely be found in the instruction manuals provided with the turbine-generator; if the unit was packaged by GE there were system descriptions for each system and usually a control system overview provided in the unit instruction manual as well. The "turbine protection overview" would also be found in the instruction manuals provided with a GE-packaged turbine-generator, and may also have been provided in one form or another in the instruction manuals provided by one of the packagers of GE-design turbine-generators. The specific "input/output list..." for the unit in question can be derived from the Mark II Speedtronic elementary of the unit. The "servo-mechanism details..." would also be available in the control system description in the instruction manual, and the "...calibration details" would be in the Mark II 'Control Specification - Control System Adjustment' drawing provided with the turbine-generator. The "start-up device operation philosophy" would be in the Starting Means system description in the instruction manual. The specific "control specification settings list" would be the Mark II 'Control Specification - System Settings' drawing provided with the turbine-generator.

So, the owners/operators of the unit should have the information about the turbine and its existing control system which could then be used to develop the scheme for applying the control system and its components to the control, protection and operation of the unit. The control system integrator is responsible for the development of the application of the control system being applied to the equipment. They should have the personnel, knowledge, and experience to understand the equipment to be controlled, protected and monitored. This would be considered proprietary information and not generally available in a forum such as this.

The control system integrator must take the existing information, along with the knowledge of the control system to be applied, and develop the system to replace the functionality of the existing control system so that the unit is properly controlled and operated and adequately protected using the devices, instrumentation and settings of the existing control and protection system (unless some of the devices and/or instrumentation are being replaced). The existing control system settings are to be adapted (converted) to the format and engineering units required for the control system being used to replace the existing control system. Again, this is the work of the control system integration firm, and one would not expect to find this type of information in any detail on any public forum on the Internet.

Stranger things have happened, but since this knowledge and information are very valuable, one would not expect it to be available for free on the Internet. However, sometimes, one never knows until one asks. It's kind of like searching for things on eBay; it's always surprising what one can find being sold there.

Contact Gas Turbine Controls. I have used them before, they have a full Library of MKII system Sequence Data for just about every GE turbine ever made. By giving them an overview of what you have, they will be able to help.