Defect diagnose of ultra-high voltage devices based on vibration monitoring method

2021 ◽  
Author(s):  
Y. Zheng ◽  
Z. Yang ◽  
J. Jiang ◽  
X. Sun ◽  
K. Zhang ◽  
...  
Keyword(s):  
High Voltage ◽  
Vibration Monitoring ◽  
Monitoring Method ◽  
Ultra High Voltage

Ultra-high-voltage Ni-rich layered cathodes in practical Li metal batteries enabled by a sulfonamide-based electrolyte

Nature Energy ◽  
2021 ◽  
Author(s):  
Weijiang Xue ◽  
Mingjun Huang ◽  
Yutao Li ◽  
Yun Guang Zhu ◽  
Rui Gao ◽  
...  
Keyword(s):  
High Voltage ◽  
Layered Cathodes ◽  
Ultra High Voltage

UHV AC and DC Coordinated Operation Techniques Based on Continuous Simulation

2015 ◽  
Vol 713-715 ◽  
pp. 1347-1350
Author(s):  
Yu Fei Rao ◽  
Lin Lin Yu
Keyword(s):  
Theoretical Analysis ◽  
High Voltage ◽  
Power Grid ◽  
Double Pole ◽  
Continuous Simulation ◽  
Operation Techniques ◽  
Load Mode ◽  
Typical Method ◽  
Ultra High Voltage

In the process of China's ultra high-voltage (UHV) construction, Henan UHV power grid is the important part. Summer great load mode of Henan power gird is chosen as the typical method. In the background of completing Nanyang UHV extension project, based on single pole running and double pole running of Hami-Zhengzhou UHVDC project respectively, it is simulated and analyzed. The results indicate that power grid cannot maintain stability when single pole block fault or double pole block fault occurs. Through theoretical analysis and simulation, under UHV AC running certain limit, HVDC latching grid is stable. Under UHV DC running certain limit, HVDC latching grid is stable. Based on continuous simulation, this paper obtained the coordinated operation of area UHV AC and DC.

Research on the Break Impact Test of Ultra High Voltage Composite Strain Insulator String

2013 ◽  
Vol 706-708 ◽  
pp. 1689-1692
Author(s):  
Cao Lan Liu ◽  
Bin Liu ◽  
Sheng Chun Liu ◽  
Zhen Liu ◽  
Kuan Jun Zhu
Keyword(s):  
Mechanical Properties ◽  
High Voltage ◽  
Impact Test ◽  
Test System ◽  
Dynamic Impact ◽  
Composite Insulator ◽  
Composite Strain ◽  
High Voltage Engineering ◽  
Dynamic Impact Factor ◽  
Ultra High Voltage

To guarantee the security of composite insulators as tension strings applied to ultra-high voltage engineering, it is necessary to study the mechanical properties of composite insulator regarding break impact. The test system was designed and the implementation plan was developed. Test was done to two insulator strings broken and the dynamic impact factor under different broken conditions at different tension was obtained accordingly, which provides reference and evidence for further study on mechanical properties of composite insulator and development of applicable design specifications.

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