【作者】 张志刚；

【导师】 黄守道；

【作者基本信息】 湖南大学 ， 电力电子与电力传动， 2005， 硕士

【摘要】 本论文对多电压输出发电机系统进行了分析和研究,针对系统中直流负载和交流负载对发电机的影响,且用电系统对直流输出的质量要求较高的特点,结合各整流电路的优缺点,提出了将三相电压型PWM整流器应用于多电压输出发电机系统。论文系统地论述了三相电压源型PWM整流器的工作原理、模型建立、主电路参数计算以及控制系统的设计等,并建立了仿真模型,给出了系统仿真结果。 在对多电压输出发电机系统中整流器控制策略进行了分析和对比的基础上,提出了采用由SVPWM控制方式的电压定向控制策略应用于多电压输出发电机系统中,并对SVPWM调制方式进行了深入的分析和研究,结合本系统对整流器的要求,采用电流的前馈解耦控制和便于数字实现的空间矢量PWM调制算法,可以降低整流器交流侧电流的谐波含量,减小直流输出的纹波电压,提高动态响应性能。 利用Matlab/Simulink建立系统的仿真模型,对系统的整流工作特性进行了仿真研究,得到了各电路参数和控制参数与系统性能之间的关系。仿真结果表明,采用SVPWM控制方式以及电压定向控制策略的PWM整流器具有良好的稳态和动态响应,验证了理论分析的正确性,为实际工程应用打下了一定的基础。更多还原

【Abstract】 This paper studies the multi-output voltage generator system. Contraposing the effect of the DC and AC Load towards generator and the speciality of high quality DC output, combining the advantages and disadvantages of different rectification circuits, this paper puts forward the idea of three-phase PWM rectifier applies to multi-output generator system. It systematically discusses the basic principles, modelling, calculation of the main circuit parameters and the design of the control system, and results in the system simulation.On the base of analyzing and contrasting to the control strategy of multi-output generator system, this paper proposes SVPWM control mode’s voltage orientation control strategy apply to the system, and analyses and studies the SVPWM modulation thoroughly. With the request of rectifier in the system, the paper puts forward using the space vector modulation algorithm, which is voltaic feed-forward decoupling control and easily digital realized, to reduce the harmonic content of rectifier AC side, minish the ripple voltage of DC side, and improve the performance of dynamic response.Simulation mode is gained by making use of a Matlab named simulation. Through the simulation, a number of simulation data are obtained for studying the relationship between the circuit parameters, controls parameters and the capability of the system. The simulation result indicates that the rectifier has a favorable steady state and dynamic response, validates the correctness of circuit simulation and theoretical analysis, and provides a good foundation for the practical engineering application.更多还原