EVALUATING THE QUALITY OF SECOND ORDER SLIDING MODE CONTROLLER FOR ZETA CONVERTER

Abstract

Zeta converters are typically used in computers, electric vehicles, LED lights, microgrid and smart grid. The output voltage is measured form open circuit output of the converter. To make effective use of this converter, its output voltage needs to be controlled. This article designs and evaluates the quality of a second order sliding mode controller (SOSMC) to control the voltage tracking of the Zeta converter based on the change of the duty cycle. By choosing a proper Lyapunov function, the stability of the controller can be proven. Simulation results in Matlab/Simulink show that the proposed algorithm is effective without steady-state error, the overshoot is 0.0978 %, the settling time is about 0.0243 s and the rising time achieves 0.0136 s. Besides, the various error performance ADD, MSE, RMSE, MPE, MAPE and MRE are also used to evaluate the quality of the proposed controller.