With the progress of mankind, and the needs of society, power electronics has been widely used. Its nerve center - terminals, is ushering in a great challenge. The world wind turbine market in the last five years the average annual growth rate of more than 30%, wind energy in electricity generation has begun to occupy an increasingly important role. The existing design technology of wind turbines on the market are very different.

These differences are mainly reflected in the combination of wind turbines and power generation systems. A speed depends on the wind speed of wind power technology has been applied to the wind power market, which is as large as possible to obtain wind energy. Variable speed wind turbine technology can capture the energy of each year is 5% higher than the fixed speed technology, and one of the reactive power and active power are relatively easy to control, but also make the grid voltage to be controlled, because it generates reactive power is variable. The drawback is the need for variable speed turbine power conversion devices, so that not only increased the number of components has also increased the complexity of control.

Applied Power Electronics Technology spent a total cost of 7% of the entire wind turbine. Its importance. The final analysis, the development of power electronics. As the voltage increases and the coarsening of the wire, the quality of the terminals also put forward higher requirements.

Experienced great development and changes in these factors combine to lead to a low-loss and good grid compatibility change due to the rapid processing of high-power semiconductor switching device technology and advanced complex algorithms of computer real-time control technology, the introduction of power electronics technology the emergence of the converter. Terminals to maximize their role. It also makes the variable speed wind turbine generators in recent years has been a lot of development, its importance is self-evident.