Gas turbine in parallel operation
Gas turbine in parallel operation
(OP)
I want to operate two frame VI machines in parallel. consider rating of 33 MW each with 4% droop.Our total plant load is 28 MW & not connected with grid.My requirement is, on tripping of one machine other should survive.Should I kept both machines at 14 MW.What can be operation philosophy?
I want back up calculation also.
I want back up calculation also.






RE: Gas turbine in parallel operation
RE: Gas turbine in parallel operation
A step load change of nearly 50% of the unit rating is certainly going to cause some disturbance to the engine, perhaps severe enough to initiate a compressor stall or surge. It will almost certainly exceed the OEM's recommended loading ramp rate and will likely have a detrimental effect on hot parts life. Your governor and IGV control loops will need to be tight, which means that the hardware needs to be well maintained and accurately calibrated plus the software tuning must be optimised. Don't assume the latter to be the case!
You should engage the engine OEM's assistance if possible. They will have the tools to dynamically model the engine-generator train with sufficient accuracy to predict the response.
RE: Gas turbine in parallel operation
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]
RE: Gas turbine in parallel operation
Apart from the capital cost of buying new machines and scrapping those he has? Probably not...
RE: Gas turbine in parallel operation
RE: Gas turbine in parallel operation
RE: Gas turbine in parallel operation
I interpreted it as he does not want to connect, not that there is no grid. I have yet to find an economical mix that yields n-1 contingency especially when taking time value of money analysis into account. Its simply cheaper to use the grid in the event of failure and pay the cost than it is to pay the upfront cost for the contingency.
What makes engineering sense does not always make economic sense.