TY - GEN
T1 - Modeling and Analysis of Low-Frequency Oscillation in PETT-based Train-network System
AU - Hong, Yi
AU - Shuai, Zhikang
AU - Wang, Xiongfei
AU - Xie, Jingyan
PY - 2020/3
Y1 - 2020/3
N2 - The power electronic traction transformer (PETT) is going to replace the power-frequency transformer of locomotive in the future considering its small volume and light weight. However, the negative damping characteristic of PETT may cause stability problems to train-network system like conventional locomotive. To study this problem, the detailed mathematical model of PETT-based train-network system is firstly established in this paper. Based on the impedance model, the system stability is analyzed using generalized Nyquist stability criterion. Moreover, the influences, including network impedance, parameters of cascaded H-bridge (CHB) and LLC converter, are studied. Lastly, the simulation based on MATLAB/Simulink is conducted to further verify the accuracy and validity of the model, which can give guidance for system parameters optimization.
AB - The power electronic traction transformer (PETT) is going to replace the power-frequency transformer of locomotive in the future considering its small volume and light weight. However, the negative damping characteristic of PETT may cause stability problems to train-network system like conventional locomotive. To study this problem, the detailed mathematical model of PETT-based train-network system is firstly established in this paper. Based on the impedance model, the system stability is analyzed using generalized Nyquist stability criterion. Moreover, the influences, including network impedance, parameters of cascaded H-bridge (CHB) and LLC converter, are studied. Lastly, the simulation based on MATLAB/Simulink is conducted to further verify the accuracy and validity of the model, which can give guidance for system parameters optimization.
KW - extended describing function method
KW - impedance model
KW - low-frequency oscillation (LFO)
KW - power electronic traction transformer (PETT)
KW - train-network system
UR - http://www.scopus.com/inward/record.url?scp=85087761286&partnerID=8YFLogxK
U2 - 10.1109/APEC39645.2020.9124257
DO - 10.1109/APEC39645.2020.9124257
M3 - Article in proceeding
AN - SCOPUS:85087761286
T3 - I E E E Applied Power Electronics Conference and Exposition. Conference Proceedings
SP - 3513
EP - 3519
BT - APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition
PB - IEEE (Institute of Electrical and Electronics Engineers)
T2 - 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020
Y2 - 15 March 2020 through 19 March 2020
ER -