Abstract
As a green and recycling energy, wind energy has attracted more and more attention of the people. Relevant utilization techniques are also becoming more and more deep and mature. Compared with traditional wind power technology, variable speed constant frequency AC double-fed exciting wind power generation technology has more advantages, such as small volume, light weight and high efficiency. For grid-side converter used in the wind power generation system, a mathematic model under synchronous coordinate system is established and a vector control strategy of grid-side converter based on grid voltage orientation is obtained through detailed derivation accordingly. It mainly describes the grid connection methods of variable speed constant frequency AC double-fed exciting motor: no-load grid connection, direct grid connection and load carrying grid connection. Based on above theoretical analysis, this paper establishes a set of simulation platform and test bed with rated power 4kW and gives its structure charts.
