Hα Robust Control of AC/DC Power Systems Based on Non-affine Nonlinear Model

The Hα robust controller design of AC/DC power system is investigated in this paper. Firstly, a novel fifth-order uncertain non-affine nonlinear model is put forward which describes the dynamics of both DC and AC systems. Then, an Hα controller is constructed by employing the feedback linearization technique and linear Hα theory. It is shown that the stability of the system is enhanced by the proposed firing angle control of the converter. The robust performance is improved as well. Simulation results illustrate the effectiveness of the proposed control strategy.