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Design And Experimental Study On Switched Reluctance Wind Generator Controller

Posted on:2009-11-25Degree:MasterType:Thesis
Country:ChinaCandidate:D S LvFull Text:PDF
GTID:2132360245494241Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
Along with the fast development of economy, humanity's demands to energy are obvious increasing, but the conventional energy source on the earth is limited, so the development and utilization of wind energy and solar energy are receiving more and more attention. In the wind energy generator domain, studies are mostly putted on the doubly-fed wind generator and direct-drive permanent magnet synchronous wind generator.As the representative of modern electrical machines, switched reluctance machine combines electrical machine theories with modern power electronics technique and advanced microprocessor control technique, which not only has low-cost strong structure, good fault-tolerant and heat-resistant capability, but also has excellent controllability. Thus, switched reluctance machine as motor has widely been used in drive and speed regulation field. In recent years, more and more attention is also paid to its application in generation field. This Paper commits to the designing research of switched reluctance wind generator (SRWG) controller.Combined with the fundamental equations, this paper establishes the simulating model of switched reluctance machine in MATLAB/SIMULINK platform based on linear and approximate linear inductance respectively. The influence of turn-on angle and turn-off angle to the performance of switched reluctance generator (SRG) is analyzed using simulation. This paper also summarizes three typical control strategies of SRG, of which the hardware realization is compared and analyzed. Based on these summarizations, a novel digital-anology hybrid controlled Current Chop Contorl (CCC) +Angle Position Control (APC) stratage using single-chip Digital Signal Controller (DSC) is proposed.Highly saturated flux linkage is one of characteristic features of SRG, and PLECS toolbox provided a non-linear inductance modeling method. This paper has designed a controller of SRWG in SIMULINK/PLECS platform. Of which, the inner controlling loop using APC + CCC method, and the goal is to reach the correct balance between criteria of high efficiency and low torque ripple. The outer loop of the controller is power loop based on speed feedback, and using traditional PI tuner and fuzzy self-tuning PI tuner respectively, and the goal is to achieve maximal wind-power tracking. Simulation results have demonstrated the proposed control strategy.This paper presents a minimal controlling system based on dsPIC30F2023 DSC, using which forenamed simulation strategy can be implemented. Rounded over-voltage & over-current protection circuit and human-computer interface are also designed. This thesis also designes a Power circuit with asymmetrical half bridge topology and based on single-value IGBT manufactured by Fairchild Company, its isolating interface for voltage & current measurement is also given. After simulation of the circuit in Cadence platform, the PCB is drawn up using Altium Designer software.This paper also completes related software design in MPLAB integrated development environment. The main work includes device-level program and arithmetic-level program. The former includes clock configuration of dsPIC30F2023, main program routine, current PWM routine, rotor position estimated routine, rotational speed computation routine, the routine of turn-on angle and turn-off angle tuning according to current chopping reference, ADC routine, SPI communication routine etc.. The latter is mainly maximum wind-power tracking program.Finally, this paper tests the switched reluctance wind generator equipment in laboratory, and analyzes the experimental results. It concludes that the tested equipment can fulfill the requested functions, but it still needs some improvement and further study.
Keywords/Search Tags:wind generation, switched reluctance generator, maximum wind-power tracking, DSC control technology
PDF Full Text Request
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