Control.com - Nerds in Control

We are going to install GTG MS5002E with MARK6 control system. I wanted to know how does the rpm is controlled between the two shaft (HP/LP) as this model has got twin shaft system?

And how do we control the exhaust temp. in this type of turbine?

The basic control scheme for GE's 2-shaft gas turbines is to control the fuel flow based on the LP shaft speed control loop and to control the 2nd stage nozzle position based on the HP speed control loop. (The 2nd stage nozzle position determines the energy split between HP and LP shafts.)

You didn't say whether your application is simple cycle or combined cycle. If simple cycle (no waste heat recovery, no regenerator) the HP speed is held at 100%. If there is waste heat recovery, exhaust temperature will adjust the HP speed setpoint to maintain a higher exhaust temperature.

Also, I retired from GE before the "E" version of the 5002, so I don't know whether this has variable inlet guide vanes. If it does, these may also be used to maintain higher exhaust temperature at part load.