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电网技术  2015 

高压交直流叠加输电特性研究及仿真

DOI: 10.13335/j.1000-3673.pst.2015.09.034, PP. 2597-2605

Keywords: 高压交直流叠加输电,Zigzag变压器,磁饱和,输送容量,最优功率传输角,仿真

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Abstract:

高压交直流叠加输电技术作为一种新的输电方式,无需对现有交流输电线路进行较大改造,可较大程度解决交流输电线路输送容量难以接近其热稳定极限的瓶颈问题,具有一定的应用前景。为进一步推动该技术的发展与应用,分析其主电路结构、直流叠加运行方式,并对Zigzag变压器实现交直流叠加与分离及避免磁饱和的机理进行了分析;研究系统电气叠加比例、输电距离对输送容量的影响特性,并得出系统最优功率传输角与输电距离的关系。建立采用Zigzag变压器的高压交直流叠加输电系统仿真模型,验证了其输电特性的正确性和有效性。

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