Results 231 to 240 of about 931,771 (301)

Design of a Grounding Grid Corrosion Detection Device Based on the Electrical Network Method

2021 International Conference on Information Control, Electrical Engineering and Rail Transit (ICEERT), 2021
Grounding grids are prone to corrosion after a period of operation, which endangers the safety of production on site. Therefore, periodic inspection of the integrity of grounding grids is very important to ensuring safe production.
Qingming Duan, Shanshan Li, Xiaofeng Yi, Hailan Song   +3 more
semanticscholar   +1 more source

Performance Assessment of Frequency Selective Grounding for Grid-Connected Photovoltaic Systems

IEEE Transactions on Power Delivery, 2023
Photovoltaic (PV) panels and their grid-connection circuitries have to be grounded to comply with various standards and industrial codes. Objectives of grounding a PV system include limiting ground currents and potentials, supporting the operation of ...
S. Saleh, S. Kanukollu, A. Al‐Durra
semanticscholar   +1 more source

Test and Simulation of Transient Characteristics of a Grounding Grid in substation

2021 International Conference on Advanced Electrical Equipment and Reliable Operation (AEERO), 2021
A large number of studies show that the transient characteristics of a grounding grid in substation is different from that at power frequency. In this paper, a test of the transient characteristics of a grounding grid is carried out. Numerical method was
Zhuoran Liu, Zhizhong Li, Sen Wang
semanticscholar   +1 more source

Impulse Impedance of Grounding Grids

IEEE Transactions on Power Apparatus and Systems, 1980
A method and an empirical formula to calculate the inductance of square grounding grids fed at either centre or one of the corners is presented. Empirical formulae for the effective area and impulse coefficient for centre fed and corner fel square grids are determinel.
B.R. Gupta, B. Thapar
openaire   +1 more source

Accumulative Imaging Method of Grounding Grid Topological Features Based on Combined Sources

IEEE Access
One essential requirement for grounding grid state detection is quick and accurate localization of the topology. The combined source detection approach works well for increasing the signal amplitude and detection efficiency inside large grounding grids ...
Xizhe Zhang, Ben Yu, Longhuan Liu, Zhihong Fu, Jinshan Yu, Xin Cheng   +5 more
semanticscholar   +1 more source

Diagnosis means and development tendency of power economy grounding grid flaws

IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference, 2021
In this paper, aiming at the positioning and quantitative evaluation of grounding grid corrosion, fracture and other faults in power system, the evaluation methods of grounding grid defects are summarized and analyzed.
Yang Hong, Zhang Yu, Yu Hua, Wang Qian, Zhang Laifu, Yudong Xu   +5 more
semanticscholar   +1 more source

Nonuniform Semi-Infinite Grounded Grids

SIAM Journal on Mathematical Analysis, 1982
Semi-infinite resistive grounded grids are countably infinite electrical networks that arise from the discretization of the partial differential equation governing the minority-carrier density in a doped semiconductor. If the doping varies with depth from the surface of the semiconductor, the grid’s resistances also vary with distance from the inputs ...
openaire   +2 more sources

Analysis of excessive sheath currents in multiple cable circuits bonded to the same grounding grid

High Voltage
In urban power networks, a common practice is to bond numerous high‐voltage cable circuits to a single grounding grid located in underground tunnels, primarily for reasons of installation convenience.
Gen Li, Wenjun Zhou, Chengke Zhou, Hang Wang, Chen Pan   +4 more
semanticscholar   +1 more source

Resonant grounded grids - quo vadis!?

IET Conference Publications, 2009
In earth fault compensated networks the basically capacitive earth fault current is counterbalanced by the injection of an inductive current through the arc suppression coils in such a way, that for most overhead line faults these arcs extinguish without the necessity of disconnecting the faulty grid section.
L. Fickert, G. Achleitner, E. Schmautzer, C. Obkircher, C. Raunig   +4 more
openaire   +1 more source

Application of The Extended Decrease-Resistance Method for Tower Grounding Grid Based on Flexible Graphite Planar Electrodes

2024 4th International Conference on Intelligent Power and Systems (ICIPS)
The grounding grid of transmission line towers in mountainous areas is complex due to the terrain, and the conventional long-extent installation method is limited, resulting in difficulty in effectively reducing the grounding resistance.
Dawei Song, Guoqiang Xu, Yu Qi, Bin Li, Wenqiang Lv, Fanqiang Meng   +5 more
semanticscholar   +1 more source