Design of an Internal Model Control strategy for single phase grid connected PWM inverters and its performance analysis with a non linear local load and weak grid.
This paper presents the design of a controller based on Internal Model Control (IMC) applied to a grid connected single phase PWM inverter. The mathematical modeling of the inverter and the LCL output filter, used to project the 1 DOF IMC controller, is presented and the decoupling of grid voltage by a Feedforward strategy is analyzed. A Proportional Resonant Controller (P+Res) was used for the control of the same plant in the running of experimental results, thus moving towards the discussion of differences regarding IMC and P+Res performances, which arrived at the evaluation of the proposed control strategy. The results are presented for typical conditions, for weak grid and for non linear local load, in order to verify the behavior of the controller against such situations.
ISA transactions