Second order sliding mode controller for a micro-wind system connected with the grid

In this paper, the authors propose to control a micro-wind system connected with the grid by using an automotive alternator. Typically, a micro-wind system can be emulated into a laboratory and it is achieved through three independent control systems: 1) DC-motor velocity controller for emulating the turbine operation; 2) DC/AC converter controller for connecting the generated electricity with the grid at unity power factor; and 3) DC-bus voltage controller for regulating the output voltage generated by the automotive alternator. For DC-motor velocity and DC/AC converter controller we have been designed a robust non-linear controller based on a second order sliding mode technique named super-twisting algorithm, these controllers are validated through simulations in Simulink/Matlab; meanwhile, for DC-bus voltage controller we apply PI traditional algorithm controller which is validated through real time experimentation.