贯通式同相供电系统及其三相-单相变换器研究

Based on the research of three-phase to single-phase converter for co-phase traction power supply system supported by NSFC, this project would include the study on converter connection to feeder line and autonomous control in the multi-substation operating system. The major contents should be focus on the characteristic analysis and stable control when the converter-based multiple substations are synchronized. The stable control should be composed of the power autonomous equalization, dc-shift suppression, circulation control and harmonic filtering, which is applied to the three-phase to single-phase converters. Meanwhile, the contents would also include the research on diode-clamped multilevel converter in order to increase the power rate. Finally, we should develop the experimental facility and design the startup, emergency and fault schemes of the converter on synchronized feeder line. Then, the steady-state and dynamic performance could be verified to solve the problems of subsection split and power quality on the traditional traction power system. In conclusion, this proposal would explore the advanced co-phase system. It must support the theoretic analysis, experimental verification, and industrial application of this system.

本课题将在青年基金：同相供电系统三相-单相变换器研究的基础上，探索该类型变换器在多变电所模式下的并网特性及其自主控制等相关内容。首先，在分析多变电所并网系统特性的基础上，我们将结合系统稳定、自动均流、直流偏移、环流和谐波抑制等控制策略实现三相-单相变换器的综合控制；为提高系统容量研究二极管箝位多电平变换器应用在目标系统中的相关问题；提出合理的系统启动、应急与故障处理方案，完成控制器和主电路设计，组成贯通式同相牵引供电系统实验网络，验证贯通式供电系统在多变电所并网模式下的动静态性能，以期彻底解决电气化铁道的过分相和电能质量等问题。因此，本课题的研究是贯通式同相供电系统研究的最新探索，有望为其科学研究和产业化应用提供前期的理论分析和系统的实验验证基础。

本课题研究基于三相-单相变换器的贯通牵引供电系统，主要分析多变电所模式下的并网特性，结合系统稳定、自动均流、直流偏移、环流和谐波抑制等控制策略实现三相-单相变换器的控制；研究二极管箝位多电平变换器应用在目标系统中的相关问题；研究并设计了3所贯通式同相牵引供电系统实验网络，验证贯通式供电系统在多变电所并网模式下的动静态性能。该系统彻底解决电气化铁道的过分相和电能质量等问题，是贯通式同相供电系统研究的最新探索，可为其科学研究和产业化应用提供前期的理论分析和系统的实验验证基础。