Active Damping of a DC Network with a Constant Power Load: An Adaptive Passivity-Based Control Approach

Resumen: This paper proposes a nonlinear, adaptive controller to increase the stability margin of a direct-current (DC) small-scale electrical network containing a constant power load, whose value is unknown. Due to their negative incremental impedance, constant power loads are known to reduce the effective damping of a network, leading to voltage oscillations and even to network collapse. To tackle this problem, we consider the incorporation of a controlled DC-DC power converter between the feeder and the constant power load. The design of the control law for the converter is based on the use of standard Passivity-Based Control and Immersion and Invariance theories. The good performance of the controller is evaluated with numerical simulations.

¿Cómo citar?

Juan E. Machado, José Arocas-Pérez, Wei He, Romeo Ortega & Robert Grinó. Active Damping of a DC Network with a Constant Power Load: An Adaptive Passivity-Based Control Approach. Memorias del Congreso Nacional de Control Automático, pp. 237-242, 2018.

Palabras clave

Constant power loads, active damping, adaptive control, Lyapunov methods, power converters

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