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Original question:

PID 2p2z controller, integral part becomes negligible?

CCS: Compensation Designer

Michael Koval27
Intellectual 990 points
Other Parts Discussed in Thread: SFRA

Tool/software: Code Composer Studio

Hello!  We now work with Compensation Designer and try to make stable loop for DCAC (from HV_SOLAR_DCAC).  We need to make first pole not equal zero. But it is impossible. I tried to edit Comp.xml  but first pole left uninfluencing even if its value have been changed.  How to make first pole playing the role in creating stable loop.

  • 0
    TI__Mastermind 43730 points
    YOu will need to use MATLAB or some other tool. We do not support first pole not zero for a variety of compensators.

    The only compensator it can work will be for a lead lag compensator.
  • 0 in reply to Manish Bhardwaj
    Intellectual 990 points
    Thank you Manish. In a such case. There are a lot of different compensators in Comp Designer. But in SFRA module only CNTL_3P3Z_IQ_ASM is used. Can we use this CNTL_3P3Z_IQ_ASM with coefficients from different compensators ? Or for each compensator we have to use only its own program compensator? And that is concerned for working project. Can we use simple 2P2Z with coefficients for different compensators? Or not? It is very important.
  • 0 in reply to Michael Koval27
    TI__Mastermind 43730 points
    MIchael,

    the 2p2z executes the code as outlined in

    u(n)= a1*u(n-1) + a2*u(n-2) +b0*e(n) + b1*e(n-1) + b2*e(n-2)

    How you get those coefficients is not limited by the module , you can choose whichever you like as long as the coefficients for those can fit in a1,a2 , b0, b1, b2