Research On Simulating System Of Variable Speed Constant Frequency Wind Generating

As everyone knows, energy sources is one of the main substantial basis of country economy, but the lack of the general energy sources, especially excellent energy sources such as petroleum , has been the bottle-neck of world economy development. As a kind of substituent energy source, wind energy can be generated again and can be exploited cosmically. But the structure and operation of wind convert system is very complicated , so it is very necessary to build simulative system of wind turbine in lab without wind power farm surroundings .By this we can improve research level ,save time and decrease cost.The research of wind turbine simulator (WTS) is still a new subject. On the basis of analysis of wind turbine and simulator , this paper designs a suit of WTS system so as to simulate dynamically wind energy generating. This system consists of three parts: computer, simulating system and generating system.Computer is the control center of system, its software could accomplish three functions: interface, dealing with the datum, communication between CPU and DSP. the information exchange between person and machine is realized by the computer.Simulating system consists of DSP, transducer and induction motor (IM). After introduction of wind turbine and its simulative technic, according to practical demands of WTS, the WTS controller based on DSP is built. At last the system can simulate wind turbine mechanic characteristic by designing DSP software and hardwareVariable speed constant frequency wind generating system can track optimum rate of turbine speed and wind speed, obtain maximum wind energy. Brushless doubly-fed machine(BDFM) keep up the merit of doubly-fed IM, and macth low-capacity electronic devices that only deal with the speed drop power.the system has simple and substantial configuration. After introduction of BDFM, Variable speed constant frequency wind generating system is build based BDFM. Variable speed constant frequency wind generating just is carried out by BDFM eventually.At last, simulating system of variable speed constant frequency wind generating is designed based on DSP and simulating, realizes simulating variable speed constant frequency wind generating. And the experimental process and results prove the main characteristics of BDFM.This subject belongs to the Key Item for Fund of Science and Technology (60534040) and the Special Item of 10th Five-year Plan of Guangdong Province(A1050401).The simulation results and experiment results have important significance for the future research of WTS.