月刊
ISSN 1000-7229
CN 11-2583/TM
电力建设 ›› 2023, Vol. 44 ›› Issue (3): 122-137.doi: 10.12204/j.issn.1000-7229.2023.03.013
收稿日期:
2022-07-22
出版日期:
2023-03-01
发布日期:
2023-03-02
通讯作者:
李盼(1995),女,硕士研究生, 主要研究方向为直流微电网运行与稳定性分析,E-mail:作者简介:
肖朝霞(1981),女,博士,教授,博士生导师,主要研究方向为分布式发电系统与微电网、船舶电力系统、配电网运行与规划基金资助:
XIAO Zhaoxia1, LI Pan1(), ZHU Hongchi1, ZHANG Shirong2, CAO Jianing2
Received:
2022-07-22
Online:
2023-03-01
Published:
2023-03-02
Supported by:
摘要:
针对直流组网中并联Boost DC/DC变换器带恒功率负荷的“源-荷”级联系统稳定性问题,利用特征值法和阻抗比法重点分析了并联Boost DC/DC变换器系统的稳定性和带恒功率负荷的能力,并通过时域仿真法验证理论分析的正确性,系统性比较了V-I和I-V下垂控制在并联Boost DC/DC变换器系统应用中的优缺点。多台并联Boost DC/DC变换器带阻感负荷时,控制器参数的稳定域基本不随并联台数的增加而改变,V-I下垂系统随虚拟阻抗减小(I-V下垂系统随虚拟阻抗增加)系统稳定性变差;带恒功率负荷时,系统带载能力大小变化与稳定性方向一致。相同虚拟阻抗下,多台并联V-I下垂系统带载能力大于I-V下垂系统。为V-I和I-V两类下垂控制在并联Boost DC/DC变换器实际工程中的应用提供了一般设计规律。
中图分类号:
肖朝霞, 李盼, 朱洪驰, 张世荣, 曹家宁. 带恒功率负荷并联Boost DC/DC电压源组网系统稳定性分析[J]. 电力建设, 2023, 44(3): 122-137.
XIAO Zhaoxia, LI Pan, ZHU Hongchi, ZHANG Shirong, CAO Jianing. Stability Analysis of Paralleled Boost DC/DC Voltage-Source Interfaced System with Constant Power Load[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(3): 122-137.
图12 基于下垂控制的两台变换器并联输入输出阻抗伯德图及Nyquist图
Fig.12 Bode diagram and Nyquist diagram of parallel input and output impedance of two converters based on droop control
图14 基于下垂控制的10台变换器并联输入输出阻抗伯德图及Nyquist图
Fig.14 Bode diagram and Nyquist diagram of parallel input and output impedance of ten converters based on droop control
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