RIA: Some Novel Power Control Strategies for Static Power Converters

制造过程自动化程度的提高激发了对下一代固态电源变换器的研究兴趣。这些转换器预计将是坚固耐用，便宜和紧凑。这些要求不能满足现有的转换器，因为笨重的L-C组件和他们不能在所有的操作条件下运行。最近对矩阵式变换器、PWM逆变器和PWM整流器的研究显示出以下优点：完全不需要直流链路组件（对于矩阵式）；紧凑，重量轻，并与散热器集成的能力；双向功率流和低失真输入电流的可能性。尽管这些变换器具有巨大的应用潜力，并且新型功率半导体器件如MCT的可用性，但进一步的开发和应用相对停滞不前。这是由于以下原因：高转换器性能声明仅适用于理想的工作条件，例如当输入电源平衡且输出负载线性和平衡时。对于变换器来说，一个重要的未知因素是：矩阵和交直流变换器的输入输出行为对输入电源的不平衡非常敏感，其影响是未知的；PWM逆变器在直流电压纹波存在时的行为也是未知的。因此，为了使下一代变换器坚固耐用，体积小，性能高，必须首先评估不平衡的影响，并且必须探索一些新的功率控制策略来防止这些缺陷。本研究的目的是解决这些问题，并通过数学建模系统地评估转换器的行为，并为上述未知因素提供答案。提出了一些校正不平衡运行的新型功率控制策略和抑制直流电压纹波的方法。最后，研究了通过数字信号处理硬件实现所提出策略的设计指南。这项研究的成功将对下一代静态电源变换器的全面实际实现做出重大贡献。

Increased automation in the manufacturing process has spurred considerable research interest in the next generation of solid state power converters. These converters are expected to be rugged, cheap and compact. These requirements cannot be satisfied by existing converters because of bulky L-C components and their inability to operate under all operating conditions. Recent research on Matrix Converters, PWM inverters and PWM rectifiers has shown the following advantages: complete absence of dc link components (for matrix type); compact, light in weight, and the ability to integrate along with heat sink; the possibility of bi- directional power flow and low distortion input current. In spite of the enormous application potential of these converters, and the availability of new power semiconductor devices such as MCT's, further development and application has been relatively stalled. This is due to the following reasons: high converter performance claims are valid only for ideal operating conditions such as when the input supply is balanced and the output load is linear and balanced. An important list of unknowns for the converters are: Matrix and ac to dc converter input output behavior is very sensitive for the unbalances in input supply and their effects are unknown; PWM inverter behavior in the presence of dc-link voltage ripple is also unknown. Therefore, for the next generation converters to be rugged, small in size and high in performance the effects of unbalances must be first evaluated and some novel power control strategies to guard against these imperfections must be explored. The aim of this research is to address these issues and systematically evaluate the converter behavior via mathematical modeling and provide answers to the above listed unknowns. Some novel power control strategies to correct for unbalanced operation and methods to reject dc-link voltage ripple are proposed. Finally, design guides for practical realization of the proposed strategies via digital signal processing hardware are examined. The success of this research will be a major contribution towards a full scale practical realization of next generation static power converters.