Unified AC/DC hybrid admittance modelling and oscillation stability analysis for interlinking voltage source converter system

被引：1
|
作者：
Xie, Hua [1 ]
Zhao, Yigang [1 ,2 ]
Wu, Xiangyu [1 ]
Yu, Runni [1 ]
Xu, Yin [1 ]
Zhai, Suwei [3 ]
机构：
[1] Beijing Jiaotong Univ, Beijing 100044, Peoples R China
[2] State Grid Shanxi Elect Power Co, Xinzhou, Peoples R China
[3] Yunnan Elect Power Res Inst, Kunming, Peoples R China
来源：
IET RENEWABLE POWER GENERATION | 2023年 / 17卷 / 16期
基金：
中国国家自然科学基金;
关键词：
AC-DC power convertors; impedance matrix; oscillations; state-space methods; HIGH-PENETRATION; SEQUENCE; DQ;
D O I：
10.1049/rpg2.12876
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The voltage source converter (VSC) interlinking AC and DC power networks is a core equipment in AC/DC hybrid power systems. To analyze the stability of this system based on the impedance method, it is necessary to establish the hybrid AC/DC admittance model of interlinking VSC. This paper presents a unified and systematic AC/DC hybrid admittance modelling framework which is widely applicable to different control methods of interlinking VSCs. The hybrid admittance models for interlinking VSCs under PQ control, VdcIq control, and Vf control are explicitly formulated, with their elements individually reflecting the dynamics of the AC side, DC side, and the interaction between them. Subsequently, the impedance network model of interlinking VSC systems is formulated based on the hybrid admittance, and furthermore the frequency-domain modal analysis is performed to analyze the system oscillation stability. Finally, frequency scanning and time-domain simulation results in MATLAB/Simulink are provided to validate the effectiveness of the modelling and oscillation stability analysis method. This paper presents a unified AC/DC hybrid admittance modelling method and oscillation stability analysis method for interlinking voltage source converter systems.image
引用
收藏
页码：3755 / 3776
页数：22
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