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Research on Fractional Order Control Technology for Wind Power System

Author: SunQiZhen
Tutor: LiZhiMin
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: Wind power generation system Fractional control Wind Energy Tracing Control Pitch control Reactive power compensation
CLC: TM76
Type: Master's thesis
Year: 2011
Downloads: 126
Quote: 0
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Abstract


With the development of industrial technology and science, the increasingly high demand for control accuracy and flexibility. Fractional control theory derived from the theory of fractional calculus in the control areas, according to this theory and developed a new form of controller, Fractional PIλDμ controller is one of them. With the increased unit capacity of wind turbine and wind farm scale, increasing the impact of wind power on the power system of the optimization of the control technology of wind power, as well as the application of new control strategy has always been an important issue. Control theory based on Fractional Fractional control strategies used in the wind power generation control technology, control technology for wind power generation system of fractional carried out in-depth research, through the rational design of various control parameters to improve the control performance and improve system robustness, the main work: In order to solve the problem of Fractional PIλDμ controller tuning parameters, design complexity, fractional order controller design based on intelligent optimization algorithm, are presented in detail using genetic algorithm and bacterial foraging algorithm design Fractional controller steps. Example of an actual speed control system using bacterial foraging algorithm designed fractional order controller, the simulation results show that the fractional order control strategy can effectively improve the system control performance, compared to the traditional integer order control strategy has a better control effect, the system is not sensitive to changes in model parameters, better robustness. The introduction of wind power generation system based on permanent magnet synchronous generator Fractional control theory, maximum wind energy tracking control scheme designed based Fractional PIλ control strategy for the control of the target, and of the Fractional PIλ controller's parameters using genetic algorithms to optimize tuning. The simulation results show that, below the rated wind speed wind turbine can effectively maintain optimal tip speed ratio operation, the Fractional PIλ proposed control scheme has better control effect. Pitch of variable pitch wind power system control technology for the study, design the Fractional PIλDμ controller overall linear model for the variable pitch wind power generation system, bacterial foraging algorithm five Fractional PIλDμ controller control parameters to optimize tuning, and simulation results show that the application the Fractional PIλDμ control strategy not only good to achieve the control objectives, and system control performance is improved. Against the STATCOM double closed-loop control system based on genetic algorithm design Fractional PIλ controller simulation STATCOM control system effectively to improve the performance of the control strategy. For wind farms containing STATCOM reactive power compensation voltage control, respectively, whether the installation of of STATCOM devices and system failure under the conditions of the system simulation study, the simulation results show that, the STATCOM device can provide reactive power support for the system, inhibition due to wind speed randomness and volatility of the wind farm due to voltage fluctuations, the ability to improve the safe and stable operation of the wind farm.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
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