【作者】 周求宽；

【导师】 廖勇；

【作者基本信息】 重庆大学 ， 电气工程， 2007， 硕士

【摘要】 交流励磁发电机(ACEG)转子采用对称三相交流电励磁,能够实现有功、无功和转速的独立调节,在改善超高压电力系统的稳定性及变速恒频发电等领域有着广泛的应用前景。采用合适的励磁控制策略和性能优良的变频励磁电源是交流励磁发电机能够发挥其优良的调节性能、运行的灵活性及可靠性的关键。本文分析了基于动态同步坐标轴系的交流励磁发电机双通道解耦励磁控制策略,提出了采用具有优良输入、输出特性的双PWM控制交-直-交电压型变频器作为交流励磁发电机的励磁电源。采用高速数字信号处理器TMS320F2812和智能功率模块(IPM),完成了双PWM变换器励磁的交流励磁发电机励磁系统硬件设计;采用C语言完成了励磁系统的软件编写与调试。最后通过试验研究表明:基于动态同步坐标轴系的双通道解耦励磁控制策略能够实现交流励磁发电机有功、无功和转速的独立调节,发电机具备良好的动态响应能力;双PWM变换器具有功率双向流动,输入、输出谐波电流小,动态性能优良,功率因数可调等优点,是交流励磁发电机的理想励磁电源。本文所作的研究工作,为交流励磁发电机励磁系统的工程设计提供了一定的理论参考依据,为工程应用奠定了基础。更多还原

【Abstract】 There is a broad prospect for Alternating Current Excitation Generator (ACEG) in improving the stabilities of extra-high voltage power system and in constant frequency generation with variable speed, by using the three-phase alternating current excitation and realizing independent regulation of active power, reactive power and rotate speed. It is the key point for ACEG to play good regulation performance, agility and reliability of operation that using appropriate excitation control strategy and excellent excitation power supply.In this paper, the dual-passage excitation control strategy based on dynamic synchronous reference frame is analyzed and the dual PWM control AC-DC-AC voltage source converter with excellent input and output characteristics is proposed as the excitation power supply for ACEG. The hardware of excitation system for ACEG based on dual PWM converter are designed by using high speed digital signal processor TMS320F2812 and IPM. The softwares of excitation system are complied and debugged with C language. The good performance of the dual-passage excitation control strategy based on dynamic synchronous reference frame is validated through the experiment research. The independent regulation of active power, reactive power and rotate speed can be realized and the ACEG has good dynamic response ability. As the ideal excitation power supply for ACEG, the dual PWM converter has many advantages such as bidirectional power flow, low harmonics input and output currents, excellent dynamic response and adjustable power factor.The results of this paper will be helpful to design the excitation system of ACEG.更多还原