| In the wind power system, as a core component of the converter has been the focus of attention, control of the converter is also the difficulty of wind power generation technology, based on the current transformer type permanent magnet direct-drive wind power system as the research object, the control technology innovation, realize controlled rectifier and inverter.Firstly, this paper introduces the present situation of wind power generation technology and the types of wind turbines, and analyzes their characteristics. For variable speed constant frequency (VSCF) unit are introduced in detail, the double fed type unit and permanent magnet direct drive type unit is still the development direction in the future, whose is the mainstream models of the today’s market. And they are accounting for almost all of the market share. Secondly, the progress of the converter of current wind power system are introduced, on the type of current transformer and and matching question has carried on the brief description of the unit.For permanent magnet direct-drive full-power converter control algorithm research, the introduction of the voltage space vector control technology, describes the control algorithm space voltage vector control, and to achieve its programming. Select the type of full-back power converter using vector control, the use of SVPWM control technology for realization of their control algorithms. In order to carry out analysis and control, the first to establish the mathematical model of generator, inverter system, and carries on the coordinate transformation. On the basis of simulation, the software and hardware design of the converter control system is given, and some specific electrical parameters design, device selection, circuit design and software program are presented.Simulation of wind power systems to build full-power converter test platform for the converter control system. Its test shows that the proposed algorithm is feasible and practical value. |
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