A Study On Controlling Technology Of Wind Generators Based On Embedded System

Nowadays, daily energy sources consume increasing and environment empoison being serious gradually, wind power as renewable, no pollution energy source, is paid great attention by more and more countries. It is a new kind of power generation. The technology also becomes research hotspot of many countries'scholars. Wind power generators are often placed in the worse circumstance. It has very high demand for the main controller to keep the system stable. At the same time, embedded system and its advantage are introduced. Then it puts forward ARM processor which is used in wind power generators'controller. It is superior to the previous processors in hardware and software. This article connects controller and embedded system organically. The control system of the large-scale Wind Turbine Generator is designed and studied.Firstly, the paper briefly describes the operation principle and the constitution of variable speed constant frequency double-fed induction generators(DFIG). The operation area of DFIG is introduced, and the control strategy of the main controller during the maximum wind power tracking period is discussed. The function of the monitoring system is described. According to the requirements of the control system, the structure, input and output signals of the control system are analyzed. And the configuration of the core is based on the S3C2410X. Then, its host hardware frame is discussed, including SDRAM, Flash, LCD, serial port, detecting interface circuit, the remote monitoring system etc.Secondly, this article introduces the embedded operating system on Linux, and ARM-Linux is transplanted into the S3C2410X, including embedded system Linux, embedded kernel, embedded file system and user's graphics interface. It alleviates the workload of the system application exploitation. On the basis of the idea of modularized software design, the flow charts and the corresponding safety and protection design are given. According to the actual situation it adopts the project of the Browser/Server control system which takes Web server as its core and can meet the requirements. Client's browser and embedded server are connected through Common Gateway Interface (CGI). Then authorized users can access by the browser on the remote site and control the movement and operate the configuration of the system. It is able to operate and configure the system. The system has some basic functions, such as information input, query and maintain. It realizes partial monitoring functions and has broad applying prospects.At last, the paper provides generalise and review of the work done, the inadequacies of the present system and the way to improve the performance.