I am designing a robust deadbeat controller for a grid-connected inverter with a pre-filter. But after putting the inner and the prefilter controller, my overall system became a six order system. So want to learn from control experts, if that is possible. Also, what could be the effect of additional poles and zeros on the overall behaviour of the system. Your contribution will be highly appreciated.
Dear Elhassan Garba,
If your controller with the pre-filter is of order three and it is placed in parallel with the system (ie in the feedback loop) you will have order six for the new system.
Best regards
Hi Elhassan Garba
Generally, when compared with a 3rd-order system, the 6th-order system will have a longer time lag. But it depends on the eigenvalues of closed-loop system. Ideally, the controller shall be designed based on the desired behavior of the closed-loop system.
The 2nd habit that Stephen Covey covers in The 7 Habits of Highly Effective People is “Begin With the End in Mind.”
Thanks a lot for your kind answers @ Muhammad, Chukwudi, and Yew-Chung
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