On a Reverse-Acting Controller for a Wind Energy Conversion System
This experimental data support a research about a reverse-acting controller for a wind energy conversion system which main goal is to optimize wind power extraction by controlling the duty cycle of a multilevel boost converter (MBC) through a maximum power point tracking. A wind power emulator is programmed to provide a range of different wind speeds in order to activate a three phase induction motor coupled to a permanent magnet synchronous generator (PMSG). The multilevel boost converter is connected between de PMSG and a three phase inverter which finally provides the power to the load. The duty cycle of the MBC is modified by a PI controller which gains were calculated after obtaining information on several dynamic tests applied to the unified system, which allowed to get an important dynamic richness of the whole system since it was verified by the experimental tests in closed loop. Information was obtained by using two National Instruments data acquisition cards model PCI6024e in Linux real-time platform. A, B, C, D and E files represent respectively measurements of output voltage at the MBC output current at the MBC, the rotor angular speed for correspondent wind speeds, optimum rotor angular speed calculated for the different wind speeds in the turbine emulator and the duty cycle at the MBC. The MATLAB Data.m file reads the data and presents five figures. Fig. 1 shows Cp theoretical curve dependant on tip speed ratio and Cp closed loop transient behaviour. Fig. 2 indicates the specific value of maximum tip speed ratio and its dynamic behaviour in closed loop. Fig. 3 presents the optimum angular rotor speed before wind changes and also angular rotor speed transient behaviour in closed loop. Fig. 4 depicts the MBC duty cycle and finally Fig. 5 illustrates the maximum theoretical power and the measured power at the output of the MBC. Experimental measurements are valuable and they emphasize the appropriate maximum power extraction in closed loop supporting the reliable performance of the reverse-acting controller.
Steps to reproduce
Download all the files and place them in the same folder, then open Data.m and execute this file from MATLAB Editor, this program reads the A-E .dat files, then press enter step by step to display every one of the five graphics.