面向有源配电网故障主动调控的并网型变流器多功能复用方法

有源配电网故障暂态电气量演化规律复杂、分析困难、治理难度大，是新形势下我国配电网发展亟需解决的重要问题。目前广泛应用于有源配电网的各类并网型变流器具备快速、灵活的调控能力，充分利用并网型变流器参与配电网故障过程的主动调控，将为抑制有源配电网故障开辟一条新的途径。基于此，本项目提出并网型变流器“一机多用”思想，将首先研究有源配电网故障全过程中多功能复用的并网型变流器的调控需求；其次，研究多功能复用的并网型变流器的拓扑与运行机理；最后，研究多功能复用的并网型变流器的多模式控制方法。本项目成果将为突破面向有源配电网故障主动调控的并网型变流器多功能复用方法难题提供理论支撑，为有源配电网故障的全过程主动调控开辟行之有效的新途径，为电力电子装备的多元化应用探索新的道路。

The evolution law of active distribution network fault transient electrical quantity is complicated, difficult to analysis and governance, which are important issues that needs to be solved urgently in the development of China's distribution network under the new situation. At present, various types of grid-connected converters are widely used in active distribution networks which have fast and flexible regulation capabilities. Fully utilizing grid-connected converters to participate in the active control of active distribution network faults processes will helps open up a new way for suppressing active distribution network failures. Based on this, this project proposes the idea of "one machine with multiple uses" for grid-connected converters. Firstly, the regulation needs of multi-functional multiplexing grid-connected converters during the entire process of active distribution network faults is learned; Secondly, the topology of muti-functional mutiplexing grid-connected converters and it's operation mechanism is researched; Finally, the multi-mode control method of multi-functional multiplexing grid-connected converters is studied. The results of this project will provide theoretical support for the breakthrough of the multi-functional multiplexing methods for grid-connected converters towards active control of active distribution network faults. It will help us find a new and effective method for the active control of the entire process of distribution network failure and explore a new path for the diversified applications of power electronic equipment.