Nonlinear Control and Implementation of a Hybrid Power System

• Masoud Bahmanpour

  Department of Electrical Engineering, Saveh Branch, Islamic Azad University

• Hamid Reza Koofigar

  Department of Electrical Engineering, University of Isfahan, Iran

• Majid Delshad

  Department of Electrical Engineering, Isfahan Branch, Islamic Azad University, Isfahan, Iran.

• Mohammad Hasan Tosifian

In this paper, the maximum power point tracking (MPPT) and the load voltage control of a Hybrid Power System (HPS) has been investigated. The underlying HPS consists of a boost converter, a Bidirectional DC-DC converter (BDC), a photovoltaic (PV) panel, and a battery. The integral sliding mode controller (ISMC) is proposed For MPPT. The load voltage control system is based on the use of a double-loop controller, an inner one to control the current of the battery by the sliding mode control (SMC) and the outer one to control the load voltage by a PI controller. Dynamic equations of the system are derived from the “state-space averaging method”. Afterwards, a method for obtaining the load resistance is presented to improve the dynamic response. Then, the results of the proposed controllers for MPPT and the load voltage control by means of simulations using the Matlab/Simulink software are discussed. The experimentally derived results, by implementation on SPARTAN XC3S400 chip, are also given for justification.

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