Droop Control Block has Current and Voltage controller block. Almost all literature has Used PI for modelling V & I controller. any other technique could be utilised? suggestion are requested
Dear Arshad
PI controller used for droop control as a linear controller which has small perturbation around some operating point. the are many other nonlinear controller such as sliding mode control , passivity based control. etc...
Dear Arshad,
There are several control techniques like sliding mode control, model predictive control etc. PI controller is just a linear control technique which is easy to implement and reasonably robust and widely popular.
You can also design your own compemnsator which may have differnt numbers of pole and zero than a traditional PI.
The PI linear is provides an accurate control dynamics with a fast recovery performance in small neighborhood to the steady state equilibrium point; a typical system behavior away from this point cannot be obtained.
A very nice casacaded voltage and current control stratgy for dc-dc converters is presented in P. Sanchis, A. Ursaea, E. Gubia, and L. Marroyo, “Boost DC-AC inverter: A new control strategy,” IEEE Trans. Power Electron., vol. 20, no. 2, pp. 343–353, Mar. 2005. (their dc-ac converter is made up of two dc-dc converters). This uses PI blocks with additional feed forward terms to deal with nonlinear dynamics.
We used this for droop controlled dc-dc converters in T. Morstyn, B. Hredzak, and V. G. Agelidis, “Cooperative Multi-Agent Control of Heterogeneous Storage Devices Distributed in a DC Microgrid,” IEEE Transactions on Power Systems, vol. 31, no. 4, 2016.
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