Design of gain-scheduling PID controllers for Z-source inverter using iterative reduction-based heuristic algorithms


YILMAZ A. R. , EROL B. , DELİBAŞI A. , ERKMEN B.

SIMULATION MODELLING PRACTICE AND THEORY, vol.94, pp.162-176, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 94
  • Publication Date: 2019
  • Doi Number: 10.1016/j.simpat.2019.02.005
  • Title of Journal : SIMULATION MODELLING PRACTICE AND THEORY
  • Page Numbers: pp.162-176

Abstract

This paper presents gain-scheduling control strategy for Z-source inverter used in traction motors. An iterative reduction-based heuristic algorithms (IRHA) is introduced for optimization of controller parameters. Since it is difficult to implement a stabilizable optimization with the conventional heuristic algorithm, optimum design can be achieved via creating stable sets by employing IRHA. In this optimization method, a new reduced subset is created at the end of each iteration, thereby reducing computation complexity. The proposed scheme adjusts proportional, integral, differential and derivative kick coefficients (K-p, K-i, K-d and T-d). In this study, various PID controllers are designed using IRHA and H-infinity norm-based optimization methods. Furthermore, in order to overcome non-linearity which exists in the nature of ZSI, gain scheduling is resorted to. The effectiveness of the proposed gain-scheduled controller structure is demonstrated over different input values and voltage fluctuations.