Abstract
This paper shows the effectiveness of adaptive terminal sliding mode control in grid connected hybrid solar PV and wind system for improvement in error tracking performance under different disturbances. Lead acid battery arrangement is made to support hybrid system. To analyze hybrid system, d-q axis circuit models are independently derived for both PMAC (Permanent Magnet AC) generator and inverter. An adaptive Lyapunov-based rapid terminal sliding mode control is superior over the traditional PI control because of its faster error tracking capability and robustness. Q-V-based inverter control is employed to interface single phase grid and the hybrid system. To substantiate the proposed theory a number of case studies have been conducted like parametric changes of converters, inverter and the changes occurring in the hybrid system. Experimental results of proposed control are obtained from a laboratory prototype of 250 W PMAC and 500W PV hybrid module with 100 ampere-hour battery system. Small-signal stability at different disturbance points are analyzed using dynamic simulations on MATLAB/Simulink. 2014R(b) . Real time controller is implemented through programming in Lab-VIEW on NI c-RIO 9082.
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