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Emerson Ovation DEH - Feedback control loops

In the Ovation based DEH for Steam Turbine Controller, there are feedback control loops like MW Controller and Imp Pressure Controller. When none of these feedback control loops is 'IN', how is the setpoint for Governing Valves derived?

Anand
  • Greg Schirm

    Hi Anand,

    Control strategies and methodologies are something we typically discuss on a one-on-one basis. Especially when discussing steam and/or gas turbines where there can be uniquenesses dependent upon the turbine OEM.

    As such, I recommend you drop us an email/inquiry with specific details about your project. This way we can get it routed to the appropriate experts.

    Regards,

    Greg

  • Anand
    Hello Greg,
    Thanks for responding to my post so quickly. According to your advice, I am rephrasing the query below. I'm sure you would help me in getting answers.

    Regards,
    Anand

    ----------------------------------------------------------------------
    While studying the Digital Electro-Hydraulic Controller Steam Turbine based on Emerson Ovation platform, which is installed in 300MW Thermal units in India, I could see that position setpoint for positioning Governing Valves is derived through different PID controllers, meant for controlling Power (Megawatt) or Impulse Pressure. The operator has to select a specific controller by selecting the 'IN' option for that controller. But, when the controller is switched to 'OUT' status, the Governing Valves still continue to change positions. I am interested on knowing how the position setpoint is derived, when none of the PID controllers is selected.
    --------------------------------------------------------------------


    From:"Greg Schirm" <bounce-Greg_Schirm@community.emerson.com>
    To:<Ovation@community.emerson.com>
    Date:19-06-2013 17:47
    Subject:RE: [EE365 Ovation Track] Emerson Ovation DEH - Feedback control loops




    Hi Anand,

    Control strategies and methodologies are something we typically discuss on a one-on-one basis. Especially when discussing steam and/or gas turbines where there can be uniquenesses dependent upon the turbine OEM.

    As such, I recommend you drop us an email/inquiry with specific details about your project. This way we can get it routed to the appropriate experts.

    Regards,

    Greg

  • Greg Schirm

    In reply to Anand:

    Hi Anand - I believe I have identified your specific project. I would like to get you into direct contact with your project team and local experts. Could you send me an email?

  • Greg Schirm

    In reply to Greg Schirm:

    Hi Anand - I got your email and details. I have forwarded your inquiry to the correct technical contacts. I sent you a confirmation email. So hopefully you have received that.

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