Research And Design Of Wind Power Generation Control System

With the increasingly remarkable achievements of environment pollution and lack of energy, utilizing renewable energy sources has become an inexorable trend. The wind energy with the advantage of non-pollution and rich reserves, has become an important developing direction of renewable energy source and gained much concern of many countries in the world. In wind energy system, Doubly-fed variable speed wind turbines with high power which rely on low cost while high efficiency become the developing trend of wind power system nowadays. Small and medium-sized power permanent magnet synchronous wind power generation technology benefits by the development of direct-drive technology, with its advantages of simple structure and easy to maintenance, it gets into family electricity generation and greatly improves the use ratio. This thesis selective analysis operating principle and controlling strategy of two different power level wind power energy and discuss the research thought and implementation scheme of the topic.This thesis regard wind power generation system as the background, the MPPT control strategy as the object and studies the double-fed generator and direct drive permanent magnet synchronous generator, two different wind power system control strategy. The thesis' s research work mainly includes the doubly fed generator system and the design of permanent magnet synchronous generator system, control system hardware design the entire digital control system software design and programming. At first, It implements the power decoupling of double-fed generation system, voltage oriented vector control of generator active power output and parallel operation. according to the mathematical model in software which builds model in MATLAB/Simulink for the simulation and results analysis. Permanent magnet synchronous wind power generation system of the main circuit adopts the Boost circuit and analyzes several tracking control algorithm based on the maximum power and compared them. Eventually, on the basis of the perturbation method of maximum power tracking control strategy, it uses the established mathematical model in the simulation analysis in order to compare the advantages and disadvantages of the conventional perturbation MPPT control with modification of the power-speed perturbation MPPT control method.Secondly, on the principle of circuit design, it designs for the permanent magnet synchronous wind power system design and gives the device's main circuit design parameters selection of schemes, drive circuit, voltage sampling circuit, current sampling circuit, speed sampling circuit,the ADC sampling control circuit and other auxiliaries circuit design and selection of components. using the digital controller TMS320F2812 DSP experimental verification for the proposed control strategy, which combined with the design of digital control program flow chart of the whole, resource allocation based on TMS320F2812 DSP digital control is given, and the peripherals of the allocation of resources and the choice of the pins, completed the design of system software and write.Finally, sets up the experimental platform of permanent magnet synchronous wind power generation system and experimental verification. Simulation and experimental results are basic consistent with the theoretical analysis results, and show the rationality and validity of the control strategy in the system.