Download Harmonic Compensation With Zero-Sequence

Harmonic Compensation With Zero-Sequence Load
Voltage Control in a Speed-Sensor less DFIG-Based
Stand-Alone VSCF Generating System
Abstract:
In this project the speed sensor less DFIG-based stand-alone VSCF generator feeding
nonlinear unbalanced loads. DFIG system has three different modifications in the system, i.e.,
Δ/Y -connected transformer works well with balanced three-phase nonlinear load and singlephase for linear load.
In general for generation of wind power (Variable-Speed constant-frequency) using
doubly fed induction generators (DFIGs). It is reduced converter size consequent economic
advantages. DFIG-based VSCF wind power generation can be provided autonomous applications
are supply voltage quality while feeding all possible combinations of loads. To supply
nonlinear/unbalanced loads, inject harmonic current through the stator-side converter, while
others use the rotor-side converter. At the rated operating condition of the system, the rotor- and
the stator-side converters as well as the machine operate at their respective rated currents. So that
the rotor-side converter is to be used for harmonic current injection, not only the current rating of
the converter but also the current rating of the machine must be increased.
For Further Details-A Vinay,Managing director
Ph: 9030333433,0877-2261612
So, in this project three topologies of a stand-alone doubly fed induction generator
(DFIG) which can handle nonlinear unbalanced load. The zero-sequence load voltage is actively
controlled through the stator-side converter with the load neutral connected to the midpoint of
the dc-link capacitor.
The harmonic/imbalance component of the load current in each case is supplied by the
stator-side converter. So that choosing the Δ/Y transformer with neutral connection supplies the
load. The harmonic current circulating in the delta winding still distorts the load phase voltage
beyond the acceptable limit.
For Further Details-A Vinay,Managing director
Ph: 9030333433,0877-2261612
The entire proposed system will be tested using MATLAB/SIMULINK and the
simulation results demonstrate the attractive performance characteristics of the proposed
harmonics compensation with zero-sequence load voltage control in a speed-sensor less DFIGBased stand alone variable speed control frequency generating system.
For Further Details-A Vinay,Managing director
Ph: 9030333433,0877-2261612