文档介绍：The Research of Stand-alone DFIG Systems and It's Control Stratagy
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Outline
Applicable occasions and ponents
The research of fixed-pitch wind turbine
Vector control strategies based on stator-flux orientation
Simulation
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Applicable occasions and ponents
Applicable occasions:
Stand-alone wind power systems are generally used in remote areas where are not covered by the conventional power grid.
In addition to regular grid, we should promote stand-alone wind power systems vigorously and supply the power of daily lives and production for remote area residents (such as remote rural, pastoral area, island and so on).
remote rural
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Applicable occasions and ponents
pared with general wind power generation :
High mobility ;
b. Diversification of energy use ;
c. Easy installation.
Island
pastoral area
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Applicable occasions and ponents
ponents
Due to the characteristics of the wind energy instability, for the stable power supply to the regional load,wind power generation system is bined with other forms of energy such as solar energy, fuel, or adding energy storage devices ( batteries, fly wheels and so on), which can store up the wind energy .
When wind energy is insufficient, energy storage devices supply to the loads together with wind power generation system.
storage battery
Comined energy supply systems
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Applicable occasions and ponents
Structure of stand-alone DFIG systems
off grid
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The research of fixed-pitch wind turbine
Wind turbines are the primary energy conversion parts in wind power generation system i. Its used to intercept the air flowing with the ic energy, and the part of the ic energy of wind turbine blades wind swept area is converted into mechanical energy. It not only determines the effective output power of the wind power generation system, but also directly affecting the safety of the crew and stable operation,which is one of the ponents in the wind power generation system.
According to the aerodynamics, the input power o