Results 151 to 160 of about 1,585 (211)

Development and Experimental Research of Impedance Converter for VFTO Measurement

2022 5th International Conference on Energy, Electrical and Power Engineering (CEEPE), 2022
Very fast transient overvoltage (VFTO) is a special electromagnetic transient in gas-insulated switchgear (GIS). It is necessary to obtain the characteristics of VFTO to guide the insulation design of GIS and the electromagnetic protection of secondary ...
Zihan Teng, Weijiang Chen, Jun Zhao, Jiangong Zhang, Qi Wang, Haonan Lu   +5 more
openaire   +2 more sources

GIS discharge induced by vibration, metal particles and VFTO

2021 IEEE Electrical Insulation Conference (EIC), 2021
Some GIS break down after the disconnector is operated. The reason for this phenomenon is not clear. We believe that the vibration and VFTO caused by the disconnector action, as well as the metal particles inside the GIS, together cause this phenomenon ...
Weifeng Xin, Taiyu Cheng, Dong Wang, Xingquan Huang, Wenhan Wu, Bobo Zhan, Ce Xu, Guoming Ma, Wei Wang   +8 more
openaire   +2 more sources

The Development of a Novel Spacer of GIS With VFTO Tolerance

IEEE Transactions on Dielectrics and Electrical Insulation
Metal-enclosed gas-insulated switchgear (GIS) offers the advantages of a small footprint, high reliability, strong safety features, and convenient installation. As such, it has found widespread use in a variety of applications.
Zuodong Liang, Weijian Zhuang, Chuanjie Lin, Fangwei Liang, Xianhao Fan, Chuanyang Li, Jinliang He   +6 more
openaire   +2 more sources

Mechanical fault identification in GIS disconnectors with limited VFTO samples

Electric Power Systems Research
Yongzheng Zhu, Houda Zhu, Chuanji Zhang, Hongbin Li, Ze Wang   +4 more
openaire   +2 more sources

Research on Interferences of VFTO to Irregular Distributions of Secondary Side Cables

IEEE Transactions on Power Delivery, 2023
In the digital era, the secondary equipment of power system is becoming more and more sensitive to electromagnetic interference. Gas insulated switchgear (GIS) in substations will generate very fast transient overvoltage (VFTO) after switching action ...
Yongji Wu, Wei Yan, Hongtian Chen, Wu Zhang, Hao Ma   +4 more
semanticscholar   +1 more source

Regional Evaluation Study of VFTO Interference to Secondary Side Cables Based on Cloud Model and MARCOS

IEEE Transactions on Neural Networks and Learning Systems, 2023
With the advent of the data era, most power secondary side equipment tends to be digitized. The power system needs more accurate numerical results to further improve its operating efficiency.
Yongji Wu, Wei Yan, Puliang Du, Xiaomin Gong, Mengxia Zhou   +4 more
semanticscholar   +1 more source

Modelagem, Simulação e Análise de Sobretensões de Frentes Muito Rápidas (VFTO) na Operação de Transformadores em Subestações Isoladas (GIS)

2023 XV Brazilian Conference on Quality of Power (CBQEE), 2023
ResumoEste trabalho tem por objetivo apresentar os resultados obtidos através do estudo de sobretensões transitórias de frequências elevadas (VFTO), associadas às manobras de chaves seccionadoras e disjuntores no sistema elétrico de uma subestação ...
Jesus Daniel de Olivera, Nelson Clodoaldo de Jesus, Willian Souza de Jesus, Adriano Garufe Nogueira, Mateus Albuquerqui de Oliveira, P. Nunes   +5 more
semanticscholar   +1 more source

Whole Process Simulation of VFTO Coupling to Power Transformer Core Earthing Conductor

Information Security Practice and Experience, 2023
During the field practice, it was found that, the Very Fast Transient Overvoltage (VFTO) intruding into transformer will couple the corresponding VFTO signal on core earthing conductor, which provides a new way to detect VFTO impulse.
Xuezhi Ke, Zuo Yan, Zhaohui Li, Yang Peng, Xuejun Ma, Bailin Li   +5 more
semanticscholar   +1 more source

The Study of VFTO Distribution in the Insulation System of IOCT

Information Security Practice and Experience, 2023
The FDS of oil-immersed insulation paper and semi-conductive paper with different moisture content has been measured. The data measured are fitted as a function of frequency and moisture content using the amendatory Cole-Cole model by means of least ...
Qingdan Huang, Haoyong Song, Yuqing Chen, Huihong Huang, Yong Wang   +4 more
semanticscholar   +1 more source

Study on VFTO in UHV GIS substation

2011 4th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT), 2011
In GIS substations, operations of disconnectors may cause very fast transient overvoltage (VFTO) with high amplitude and steep wave front. Considering the narrower insulation margin of UHV GIS equipments and larger absolute magnitude of VFTO in UHV GIS systems, VFTO in UHV GIS systems could cause larger damage than those in EHV and lower ones ...
Wan Yiru, Chen Guang, Zhou Hao
openaire   +1 more source