In this study, approximate dynamic programming is utilized to devise an optimal procedure in order to convert DC voltage to single-phase AC voltage. In order to determine the optimal policy, a function approximator, called critic, is used. The critic, which is defined to be a function of system states and elapsed time, is tuned once offline and then used in feedback control to achieve the desired AC voltage. Simulations show that the proposed controller not only performs successfully with linear and highly nonlinear load, but also has some relative robustness to parameter uncertainty and disturbances.

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