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M
Hallo guys !
On our site we are using Woodward 5009 as speed controller for our little 11,5 MW back pressure (+extraction) turbines.
By reading the Woodward manual, I noticed that there are some "blank" spots in the documentation, regarding the valves control according the implemented steam map. Generally I would like to understand the way the PID-output of let's say the cascade controller is being calculated into Valve demand, passing through the steam map and the various limiters. In Woodward, the steam map is being defined by 4 points. Later on there are several parameters being used to calculate the Valve demand (K1-K6 and D1-D3) while using the several PID-Output signals. Are those factors calculated or some empirical data of the turbine manufacturer or special design features ? Although the description sounds like they could be calculated (for example: Delta-HP/ Delta-Load) the numbers do not add up...Has somebody have any experience with those transformations/parameters ?
Thanks in advance,
M.
On our site we are using Woodward 5009 as speed controller for our little 11,5 MW back pressure (+extraction) turbines.
By reading the Woodward manual, I noticed that there are some "blank" spots in the documentation, regarding the valves control according the implemented steam map. Generally I would like to understand the way the PID-output of let's say the cascade controller is being calculated into Valve demand, passing through the steam map and the various limiters. In Woodward, the steam map is being defined by 4 points. Later on there are several parameters being used to calculate the Valve demand (K1-K6 and D1-D3) while using the several PID-Output signals. Are those factors calculated or some empirical data of the turbine manufacturer or special design features ? Although the description sounds like they could be calculated (for example: Delta-HP/ Delta-Load) the numbers do not add up...Has somebody have any experience with those transformations/parameters ?
Thanks in advance,
M.
