作者机构：
[李向新; 张颖; 张贞; Zeng, Xiang; 文明] School of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
通讯机构：
[Zhang, Y.] S;School of Electrical and Information Engineering, Changsha University of Science and Technology, China
作者机构：
[施方圆; 周羽生; 邝江华] Changsha University of Science and Technology, Changsha 410114, China;[石晶; 唐跃进] Huazhong University of Science and Technology, Wuhan 430074, China
通讯机构：
[Zhou, Y.-S.] C;Changsha University of Science and Technology, Changsha 410114, China
作者机构：
graduate student of the School of Electrical & Information Engineering,Changsha University of Scienc;IEEE;School of Electrical & Information Engineering,Changsha University of Science and Technology,Hunan P
会议名称：
第七届电力系统技术国际会议(POWERCON 2010)
会议时间：
2010-10-25
会议地点：
杭州
会议论文集名称：
第七届电力系统技术国际会议(POWERCON 2010)论文集
关键词：
Capacitance current:Neutral-point:Overvoltage:Wind farm:Arc-suppression coil:ATP:Grounding arc foult:Arc medium electric strength recovery:Neutral point ungrounded system:Reactor
摘要：
Neutral-point non-effectively grounded system is used in the wind farm with complex structure, high cost, wide distribution and higher capacitance current. This paper presents an arc-suppression method for the neutral non-effective grounding system-voltage arc-suppression method. A reactor is directly connected to the fault bus and ground. The voltage of the reactor is used to suppress the voltage of the fault phase, to make sure it become much smaller than the amplitude of electric strength recovery, undermine the arc renewed mechanism, and remove the arc grounding. Simulation result in the paper verifies the validity and advantages of the method and it is not affected by grounding current, eliminating the complex track and compensation calculation. Arc-suppression method is simple. Especially suitable for system with high capacity current，such as cables wind farms.
作者：
Aixiang Zeng;Xiao'an Qin;Yuanyuan Wang;Hui Pan
期刊：
International Journal of Advanced Mechatronic Systems,2012年4(1):18-24 ISSN：1756-8412
通讯作者：
Zeng, A.
作者机构：
[Yuanyuan Wang; Hui Pan] School of Electrical and Information Engineering, Changsha University of Science and Technology, 960, 2nd Section, Wanjiali South RD, Changsha, Hunan, 410004, China;[Aixiang Zeng] School of Physics and Electronic Science, Changsha University of Science and Technology, 960, 2nd Section, Wanjiali South RD, Changsha, Hunan, 410004, China;[Xiao'an Qin] Wuhan Power Supply Company, 14F, Gaoke Plaza, Guandong Science and Technology Industry Park, Wuhan, Hubei, 430074, China
通讯机构：
[Zeng, A.] S;School of Physics and Electronic Science, Changsha University of Science and Technology, 960, Wanjiali South RD, China
关键词：
EHV transmission lines;extra high voltage;non-unit transient protection;Hilbert-Huang transform;HHT energy spectrum;travelling waves;fault protection;wave protection;power systems stability;power systems economy;simulation;internal faults;external faults.
摘要：
Traditional double-terminal travelling wave protection schemes are unable to satisfy the requirement of power systems stability and economy. In order to solve these problems for extra high voltage (EHV) transmission lines protection, a novel non-unit transient protection based on HHT energy spectrum is developed. The travelling-wave characteristics between internal faults and external faults are analysed. The main difference is that the travelling wave high frequency components energy caused by the internal faults is larger than that caused by the external faults due to the influences of line trap and bus-to-ground capacitance. Intrinsic mode functions (IMF) of travelling wave are extracted by the empirical mode decomposition (EMD). And then Hilbert-Huang transform (HHT) is utilised to calculate the corresponding instantaneous frequency of each IMF component to obtain energy spectrum. Finally, the energy spectrum is applied to distinguish the internal and external fault. EMTP simulation results show that, under different fault conditions, the novel scheme can distinguish reliably the internal faults from external faults and protect the whole transmission line with high sensitivity.
摘要：
This paper introduces a clock synchronization technology based on PTP (IEEE 1588) by first elaborating on the IEEE 1588 solutions, then analyzing the deficiencies in the conventional system and traveling wave location base on GPS, and finally proposing an application scheme. the method is benefit for improving the accuracy of traveling wave location system.
作者机构：
[Luo, Ke; Meng, Ying] Institute of Computer and Communication Engineering, Changsha University of Science and Technology, Changsha Hunan, China;[Liu, Jianhua] Institute of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha Hunan, China
通讯机构：
[Meng, Y.] I;Institute of Computer and Communication Engineering, , Changsha Hunan, China
会议名称：
2012 International Conference on Materials Engineering and Automatic Control, ICMEAC 2012
摘要：
Because of the traditional K-medoids clustering algorithm the initial clustering center sensitive, the global search ability is poor, easily trapped into local optimal and slow convergent speed; therefore, this article proposes an improved K-medoids clustering algorithm. Differential evolution is a kind of heuristic global search technology population, has strong robustness. Combined with K-medoids clustering algorithm efficiency and the global optimization ability of DE algorithm, not only can effectively overcome the detects of the K-medoids clustering algorithm, but also can raise the global search capability, short the convergence time, effectively improve the clustering quality. Finally, the algorithm is verified stability and robustness by simulation.
期刊：
Advances in Intelligent and Soft Computing,2012年165 AISC:237-245 ISSN：1867-5662
通讯作者：
Xiao Zhi-Quan
作者机构：
[Xiao Zhi-Quan] Wuhan Text Univ, Sch Mech & Elect Engn, Wuhan, Hubei, Peoples R China.;[Xiao Zhi-Quan] Chinese Acad Sci, Key Lab Complex Syst & Intelligent Sci, Inst Automat, Beijing, Peoples R China.;[Mo Hong] Changsha Univ Sci & Technol, Coll Elect & Informat, Changsha, Hunan, Peoples R China.
通讯机构：
[Xiao Zhi-Quan] W;Wuhan Text Univ, Sch Mech & Elect Engn, Wuhan, Hubei, Peoples R China.
会议名称：
ICTAM 2012
会议时间：
2012
会议地点：
Cheju Island, Korea
会议主办单位：
[Xiao Zhi-Quan] Wuhan Text Univ, Sch Mech & Elect Engn, Wuhan, Hubei, Peoples R China.^[Xiao Zhi-Quan] Chinese Acad Sci, Key Lab Complex Syst & Intelligent Sci, Inst Automat, Beijing, Peoples R China.^[Mo Hong] Changsha Univ Sci & Technol, Coll Elect & Informat, Changsha, Hunan, Peoples R China.
会议论文集名称：
Advances in technology and management
关键词：
Word-cell;interval type-2 fuzzy set;footprint of uncertainty;fuzzy hypercube;information granule
摘要：
A new concept of word-cell is introduced. It evolves from the concepts of footprint of uncertainty (FOU) of interval type-2 fuzzy set and sets-as-points geometric view of fuzzy sets. The word-cell can be graphically illustrated in the fuzzy hypercube as certain type of an information granule. Based on the construction approach of word-cell, some properties are discussed. The further understanding of word-cell may help us to use fuzzy sets as linguistic terms (word) for the numerically studying of linguistic dynamic systems(LDS).
作者机构：
[梁昔明; 黄亚飞; 陈义雄] School of Information Science and Engineering, Central South University, Changsha 410083, China;[黄亚飞] School of Electric and Information Engineering, Changsha University of Science and Technology, Changsha 410114, China
通讯机构：
School of Information Science and Engineering, Central South University, China
