(1.)Basic Information

Professor Dr. Zhiyuan Liu

Department of Electrical Engineering
Xi’an Jiaotong University,
28 West Xianning Road,
710049 Xi’an, Shaanxi Province,
China
Tel: 86-29-82668597
Email: liuzy@mail.xjtu.edu.cn

WEB: http://gr.xjtu.edu.cn/web/liuzy/

 

 

    Zhiyuan Liu was born in Shenyang, Liaoning Province, China in 1971. He received the B. Sci. and M. Sci. degrees in electrical engineering from Shenyang University of Technology, Shenyang, China in 1994 and 1997 respectively. He received the Ph.D degree in electrical engineering from Xi'an Jiaotong University, Xi'an, China in 2001. He held the post of Postdoctoral in Xi'an Jiaotong University from 2003 to 2005.
 
    He worked for global research center Shanghai of General Electric company from 2001 to 2002. Since 2003, he has been working in state key laboratory of electrical insulation and power equipment, department of electrical engineering, Xi'an Jiaotong University, Xi'an, China. Now he is a professor in Xi'an Jiaotong University. He is primarily involved with research on vacuum arc theory and development of transmission voltage level vacuum circuit breakers. He has published over 150 technical papers and he hold more than 20 Chinese patents.
 
    He is a member of current zero club. He is a member of CIGRE working group A3.27 "The impact of the application of vacuum switchgear at transmission voltages" and a member of CIGRE working group JWG A3/B4.34 "Technical requirements and specifications of state-of-the-art DC switching equipment". He is a member of guest editor committee of IEEE Transactions on Power Delivery Special issue on "Power Switchgear Technology and Applications", September, 2014.

 

(2.)Positions

ACADAMIC ASSOCIATION
 

1. Member of current zero club from 2008
2. Member of CIGRE working group A3.27 “The impact of the application of vacuum switchgear at transmission voltages” from 2009 to 2014.
3. Member of CIGRE working group A3/B4.34 "Technical requirements and specifications of state-of-the-art DC switching equipment" from 2014

4. Member of guest editor committee of IEEE Transactions on Power Delivery Special issue on "Power Switchgear Technology and Applications", September, 2014.

5. IEEE Senior member from 2014

(3.)Education

EDUCATION
 

1997 - 2001
Xi’an Jiaotong University Xi’an, Shaanxi Province, China
Ph.D/Electrical Engineering
Research on vacuum arc and  generator vacuum circuit breaker
 

1994 -1997
Shenyang University of Technology Shenyang, Liaoning Province, China
MS/Electrical Engineering
 

1990 -1994
Shenyang University of Technology Shenyang, Liaoning Province, China
BS/Electrical Engineering

(4.)Scientific Research

          

           Prof. Dr. Zhiyuan Liu is one of the major contributors in the research field in transmission voltage level vacuum circuit breaker in China. His team developed the first 126kV/2500A/40kA single-break vacuum circuit breaker in China, which passed type test in 2013. The contribution is toward to reduce SF6 gas usage in high voltage switchgear. SF6 gas is a strong global warming effect gas pointed by Kyoto protocol. In the field of transmission voltage level vacuum circuit breaker, he held more than 20 Chinese patents. He published more than 150 technical papers, mainly in the field of vacuum circuit breaker, including vacuum arc, vacuum insulation, operating mechanism ect.

(5.) Selected published papers

 

2013

1. Zhang, Yingyao; Yao, Xiaofei; Liu, Zhiyuan; Geng, Yingsan; Liu, Ping Axial Magnetic Field Strength Needed For a 126 kV Single-Break Vacuum Circuit Breaker during        Asymmetrical Current Switching, IEEE Transactions on Plasma Science, Vol. 41, No.8, August 2013, pp.2034-2042

2. Guowei Kong, Zhiyuan Liu, , Yingsan Geng, Hui Ma and Xiaohui Xue Anode Spot Formation Threshold Current Dependent on Dynamic Solid angle in Vacuum Subjected to Axial Magnetic Fields, IEEE Transactions on Plasma Science, Vol. 41, No.8, August 2013, pp. 2051-2060

 

2012

3.Zhenxing Wang, Yingsan Geng, and Zhiyuan Liu, Stepwise Behavior of Free Recovery Processes after Diffused Vacuum Arc Extinction, IEEE Transactions on Dielectrics and Electrical Insulation, Vol.19, No.2, April 2012, pp.582-590

 

2011

4. Yu, Li, Wang, Jianhua; Geng, Yingsan; Kong, Guowei; Liu, Zhiyuan, High-current vacuum arc phenomena of nanocrystalline CuCr25 contact material, IEEE Transactions on Plasma Science, v 39, n 6 PART 1, p 1418-1426, June 2011

5. Kong, Guowei, Liu, Zhiyuan; Wang, Dong; Rong, Mingzhe, High-current vacuum arc: The relationship between anode phenomena and the average opening velocity of vacuum interrupters, IEEE Transactions on Plasma Science, v 39, n 6 PART 1, p 1370-1378, June 2011

6. Yingyao Zhang; Zhiyuan Liu; Yingsan Geng; Lanjun Yang; Jimei wang, Lightning Impulse Voltage Breakdown Characteristics of Vacuum Interrupters with Contact Gaps 10mm to 50mm, IEEE Transactions on Dielectrics and Electrical Insulation, vol.18, no.6, pp.2123-2130, December 2011

 

2010

7. Zhai, Xiaoshe, Wang, Jianhua; Geng, Yingsan; Yu, Li; Liu, Zhiyuan, Transfer function and network synthesis of electrical fast transient/burst generator based on latent-roots method, IEEE Transactions on Electromagnetic Compatibility, v 52, n 4, p 790-796, November 2010

 

2009

8. Yingyao Zhang, Zhiyuan Liu, Shaoyong Cheng, lanjun Yang, Yingsan Geng, Jimei wang, Influence of Contact Contour on Breakdown Behaviors in Vacuum Under Uniform Field, IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, Issue 6, pp. 1717-1723, December 2009

9. Zhiyuan Liu, Dong Wang, Mingzhe Rong, Jimei Wang, Quan Wang, Comparison of vacuum arc behaviors for slot-type axial magnetic field contacts with and without iron plates, IEEE Trans. Plasma Science, Vol.37, No.8, August 2009 pp.1458-1468

10. Zhiyuan Liu, Zhongyi Wang, Yuesheng Zheng, and Jimei Wang, Critical radius of axial magnetic-field contacts in vacuum interrupters, IEEE Trans. Power Delivery, Vol.24, No.2, April 2009, pp.672-678
 

(6.)Selected issued patents

 

1. Zhiyuan Liu, Jimei Wang, Shixin Xu, et al., A new cup type axial magnetic field vacuum interrupter electrode with iron, Chinese patent 200420086297X
2. Zhiyuan Liu, Jimei Wang, Shixin Xu, et al., A single coil type axial magnetic field vacuum interrupter electrode, Chinese patent 2004200862768
3. Zhiyuan Liu, Jimei Wang, Xiaoling Yu, Xiu Shixin, A high voltage vacuum circuit breakers with high rated nominal currents, Chinese patent 200610104904.4
4. Jimei Wang, Zhiyuan Liu, Shixin Xu, et al., Ultra high voltage vacuum circuit breaker, Chinese patent 200310105867.5
5. Jimei Wang, Zhiyuan Liu, Shixin Xu, et al., A new high voltage vacuum circuit breaker with high nominal current, Chinese patent 2004200862753
6. Shixin Xu, Zhiyuan Liu, Jimei Wang, et al., A new high voltage axial magnetic field vacuum interrupter electrode, Chinese patent 200420086389.8
7. Jimei Wang, Zhiyuan Liu，A high voltage vacuum circuit breaker with  fluid as external insulation of vacuum interrupters, Chinese patent 200520079678.X
8. Jimei Wang, Zhiyuan Liu, Heming Zhou, A two coils axial magnetic field vacuum interrupter electrode, Chinese patent 200510049467.6
9. Xuedong Wu, Bingxu Tao, Zhiyuan Liu，A new contact material with high interrupting capacity, Chinese patent 200610056798.7
10. Zhongyi Wang, Jimei Wang, Shixin Xu and Zhiyuan Liu, A new bipolar axial magnetic field vacuum interrupter electrode, Chinese patent 200420086277.2