PROJECT TITLE :
ESO-based Inertia Emulation and Rotor Speed Recovery Control for DFIGs - 2017
In recent times, with the ever increasing penetration of wind generation, nice issues are raised since the constantly decline of system's inertia may significantly deteriorate the frequency stability of power system. During this regard, an inertial response control technique is proposed to enable wind generators to provide the facility system with controlled inertia in want via releasing energy to or absorbing energy from the system. In this paper, an extended state observer (ESO)-primarily based inertia emulation controller (InEC) is proposed for doubly-fed induction generators (DFIGs), that is shown to be strong to measurement noise and changing operating conditions. As well, to mitigate potential adverse impacts of rotor speed recovery control (RSRC) of DFIGs on system frequency, an ESO-based mostly RSRC is derived, allowing a schedulable dynamic of speed recovery. Experiments carried out on a power hardware-in-loop testbed manifest that the proposed controllers outperform the traditional proportional-differential type InEC and proportional-integral type RSRC in performance and robustness.
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