196.rar - A hardware-in-the-loop simulation of a wind
energy conversion system is used to assess a MPPT strategy
for different velocities. The actual system is composed of the
blade, a mechanical power train, a squirrel cage induction
generator and power electronics. The experimental set-up
consists of a DC drive connected to the induction generator.
The DC machine is controlled to impose the same behavior as
the wind turbine to the induction generator. Fluctuations of
wind velocity and non-linear characteristics of the turbine are
taken into account. All numerous model and controls blocks
are organized according to Energetic Macroscopic
Representation for real-time implementation. A very simple
MPPT strategy without wind velocity measurement is
achieved using a look-up table. This strategy includes a
rotation speed limitation. Experimental results are provided
for weak and medium wind profiles.,2014-02-14 05:48:48,下载66次
21__430_436.rar - The generating systems use Doubly-Fed Induction Generators (DFIGs) to achieve high
conversion efficiency and to reduce the installation cost. This paper presents a modeling and Maximum
Power Point Tracking (MPPT) control method of DFIG-based variable-speed wind energy conversion
system. The generator considered is a wound rotor induction machine whose stator is connected directly
to the grid and the rotor is fed through back-to-back Pulse-Width Modulation (PWM) converters. Stator
flux-oriented vector control is applied to control the active and reactive current loops independently. The
MPPT control method in a Wind Energy Conversion System (WECS) is proposed. The proposed control
solution aims at driving the position of the operating point near to optimality. This is a very important
aspect to maintain DFIGs efficiently in a variable wind speed. The wind generator is modeled in RSCAD
program which is interfaced with the Real Time Digital Simulator (RTDS).,2014-02-14 05:47:01,下载131次