Title :
Design and analysis of a microprocessor-controlled peak-power-tracking system [for solar cell arrays]
Author :
Huynh, P. ; Cho, B.H.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
Stability and dynamics of a series configuration peak-power tracking (PPT) system are analyzed. The operating modes of the system, as well as mode transitions, are investigated based on qualitative graphical representations of dc load lines at various interfaces of the system. Analysis of multiloop control in the PPT mode is discussed. This includes the design of the inner voltage loop and analysis of the closed-loop system stability around the peak-power point. For an optimum dynamic performance and stability, design parameters of the inner voltage loop and the outer PPT loop are identified. Experimental verifications, supported by simulation results, are performed.
Keywords :
aerospace control; closed loop systems; photovoltaic power systems; power system control; power system stability; semiconductor device reliability; solar cell arrays; solar cells; space vehicle power plants; PPT mode; closed-loop system stability; dc load lines; inner voltage loop; microprocessor-controlled peak-power-tracking; mode transitions; multiloop control; optimum dynamic performance; Batteries; Control systems; Nonlinear dynamical systems; Photovoltaic cells; Power generation; Regulators; Sampling methods; Space vehicles; Stability analysis; Tracking loops; Voltage control;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
