SISO Stability Criterion Derived From a Three-Port Admittance Model of Train-Network System and Its Applications in Low-Frequency Oscillation Analysis

被引：0
作者：
Zhou, Yi [1 ]
Qin, Qunlin [2 ]
Luo, Huan [1 ]
Qiu, Yiwei [1 ]
Zang, Tianlei [1 ]
Zhou, Buxiang [1 ]
机构：
[1] Sichuan Univ, Sch Elect Engn, Chengdu 610065, Peoples R China
[2] State Grid Sichuan Elect Power Co, Chengdu 610065, Peoples R China
来源：
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION | 2024年 / 10卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Admittance; Stability criteria; Impedance; Power system stability; Phase locked loops; Circuit stability; MIMO communication; Low-frequency oscillation (LFO); single-input and single-output (SISO) stability criterion; three-port admittance; train-network system; virtual impedance; IMPEDANCE MEASUREMENT; CONVERTER; EQUIVALENT;
D O I：
10.1109/TTE.2024.3357132
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Frequency-domain admittance models have been widely utilized to analyze the low-frequency oscillation (LFO) issue in train-network systems. Since existing dq-frame or $\alpha \beta $ -frame admittance models of train-network systems are usually built from ac-port, impacts of dc-side passive impedance on the LFO cannot be explicitly characterized. In addition, admittance models built from ac-port are multiple input and multiple output (MIMO) systems, which is inconvenient for admittance measurement and stability margin estimation such as a single-input and single-output (SISO) system. As a result, this article builds a three-port admittance model of train-network systems. From the perspective of dc-port, a novel SISO stability criterion is derived to analyze the LFO. It is verified that the proposed SISO stability criterion and the traditional MIMO stability criterion in the dq-frame are different reduced-order forms of the three-port admittance model, and all of them are equivalent under some preconditions. Moreover, impacts of dc-side passive impedance on the LFO are explicitly revealed based on the proposed SISO stability criterion, and a virtual resistor control based on the feedback of dc-link capacitor current is then proposed to suppress the LFO. Finally, the experiment results by StarSim hardware in the loop (HIL) are employed to verify the correctness of theoretical analysis results.
引用
收藏
页码：8263 / 8274
页数：12
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