Limit Induced Bifurcation of Grid-Connected VSC Caused by Current Limit

被引：27

作者：

Xing, Guangzheng ^{[1
]}

Min, Yong ^{[1
]}

Chen, Lei ^{[1
]}

Mao, Hangyin ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Control & Simulat Power Syst & Gene, Beijing 100084, Peoples R China

[2] State Grid Zhejiang Elect Power Co LTD, Hangzhou 310007, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2021年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Phase locked loops; Eigenvalues and eigenfunctions; Mathematical model; Bifurcation; Power system stability; Voltage control; Oscillators; Voltage source converter (VSC); limit induced bifurcation (LIB); current limit; subsynchronous oscillation; STABILITY;

D O I：

10.1109/TPWRS.2021.3053142

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：

This letter demonstrates a new instability scenario of grid-connected voltage source converter (VSC) - limit induced bifurcation (LIB) caused by the current reference limit from the outer control loop. When the current reference reaches limit, the control structure of the VSC and the equations of the system switch. The outer control loop is actually removed from the equations. The eigenvalues of the system change as well. When the current limit exceeds a critical value, the system may immediately become oscillatorily unstable when encountering the limit and LIB occurs. Eigenvalue analysis is conducted and time-domain simulation is utilized to verify the results.

引用

页码：2717 / 2720

页数：4

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