厉泽坤;孔力;裴玮;叶华;邓卫;

• 1:中国科学院电工研究所
• 2:中国科学院大学

摘要(Abstract)：

作为未来交直流混合配电网的重要组成部分,直流微电网的稳定性对配电网的安全运行至关重要。混合势函数作为一种非线性电路大扰动稳定性分析的有效工具,已被应用在带恒功率负载的级联系统等方向,但对于含有多个电源的下垂控制直流微电网的稳定性分析则较少涉及。研究了包含VSC和双向非隔离型DC-DC变流器,负荷为恒功率负载的直流微电网的大扰动稳定性。首先,通过对一简单系统应用混合势函数进行理论分析,发现若直接应用混合势函数理论,会导致所求的稳定性判据有较大误差。针对这一问题,提出了一种基于混合势函数理论,适用于下垂控制系统的稳定性判据推导方法,并得出了直流微电网的稳定性判据。该判据表明,下垂控制的直流微电网的大扰动稳定性与各变流器系统参数和各电源输出功率占负载功率比例均有关联。仿真验证了所提方法和稳定性判据的准确性。

关键词(KeyWords)： 直流微电网;恒功率负载;混合势函数;大扰动稳定性;下垂控制

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2017YFB093300)~~

作者(Author): 厉泽坤;孔力;裴玮;叶华;邓卫;

Email:

DOI: 10.13335/j.1000-3673.pst.2018.1392

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