张鹏,李慧,刘思嘉,范新桥

• 1:北京信息科技大学自动化学院

摘要(Abstract)：

小信号建模是分析直流电网稳定性和系统参数整定的重要方法。为了研究接入平波电抗器的直流电网小干扰稳定性问题,提出一种基于模块化多电平换流器MMC(modular multilevel converter)的直流电网小干扰稳定性简化模型。首先,推导换流站与交流侧、控制器以及含平波电抗器的直流网络等各部分输入量、输出量和状态变量之间的耦合关系,建立整个系统的非线性状态空间模型;然后,利用特征值和根轨迹分析方法研究控制参数、直流设备参数和桥臂电感参数等对系统稳定性的影响;最后,在PSCAD/EMTDC平台上搭建四端直流电网仿真模型,验证了所提建模方法的准确性和各参数对小干扰稳定性影响结论的正确性。

关键词(KeyWords)： 直流电网;模块化多电平换流器;稳定性分析;小信号法;根轨迹

Abstract:

Keywords:

基金项目(Foundation): 北京市自然科学基金资助项目(3172015)

作者(Author): 张鹏,李慧,刘思嘉,范新桥

DOI: 10.19635/j.cnki.csu-epsa.000373

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