应用于高压低频输电的H桥级联型矩阵变换器环流机理分析

发布时间：2018-06-12 05:13

  本文选题：高压低频交流输电 + 级联H桥型矩阵变换器　； 参考：《电工技术学报》2017年06期

【摘要】：高压低频交流输电技术对于大规模海上风电并网、大城市集中区域供电以及现有高压电力电缆线路扩容改造等一些必须采用高压电力电缆输电的应用场景具有独特的优势。高压大容量交-交电能变换装置为该技术的核心问题,基于H桥级联的矩阵式变换器(CHB-MC)以其优异的低频工作性能,成为实现高压低频交流输电技术的重要途径之一。CHB-MC是一种适用于高电压、大容量场合的直接型交-交变换器拓扑结构。从CHB-MC的电容电压波动入手,分析换流器环流机理;利用换流器内部环流等效电路,提出电容电压波动及环流的通项公式;推导特征环流频率及其幅值。进而对影响CHB-MC特征频率环流的相关参数进行深入的分析,并通过数字仿真进行相关证明。
[Abstract]:High-voltage low-frequency AC transmission technology has unique advantages for large-scale offshore wind power grid connection, centralized power supply in large cities, and expansion and transformation of existing high-voltage power cable lines. High voltage and large capacity AC / AC converter is the core problem of this technology. The matrix converter based on H-bridge cascade is CHB-MC-based for its excellent low frequency performance. CHB-MC is a kind of direct AC-AC converter topology suitable for high voltage and large capacity. Based on the capacitance voltage fluctuation of CHB-MC, the circulation mechanism of converter is analyzed, the formula of capacitance voltage fluctuation and general term of circulation is proposed by using the equivalent circuit of internal circulation of converter, and the characteristic circulation frequency and its amplitude are deduced. Furthermore, the related parameters affecting CHB-MC characteristic frequency circulation are deeply analyzed and proved by digital simulation.
【作者单位】： 新能源电力系统国家重点实验室(华北电力大学);
【基金】：中央高校基本科研业务费专项资金资助项目(2016MS11)
【分类号】：TM46
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本文编号：2008507