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检索条件"主题词=Cable joint"

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Nonlinear Switching Transient Field Simulation of cable joint without Residual Charge

Nonlinear Switching Transient Field Simulation of Cable Join...

作者： Mingyan Wu Jun Xiong Lei Liao Lu Zhu Ruxin Zhang Zheng Wu Gang Du Xueyou Huang Haiming Li Jian Zhang Sizhuo Liao Binxian Lu Guagnzhou Power Supply CSG Department of Electrical and Electronic Engineering North China Electric Power University

The analysis of the impulse voltage on the internal electric field of the cable joint plays a key role in studying the breakdown of the joint. Based on the finite element method, a three-dimensional electromagnetic field simulation model of the cable joint is established in this paper. Simulation results show that the voltage at the head of the cable joint reaches about twice the impulse voltage. The increase of the conductivity of semi-conductive material also leads to the increase of electric field intensity. Then, several points and curves at different positions are selected for further analysis in this paper. Among them, the electric field distortion at the edge of the high voltage shield is the most serious and the electric field in the air gap is the least.

关键词： cable joint Switching Transient Field 3D Transient Electromagnetic Simulation Model Finite Element Method

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Transient Simulation Model for Electric Field Distribution in cable joint

Transient Simulation Model for Electric Field Distribution i...

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作者： Lei Liao Ruxin Zhang Gang Du Mingyan Wu Zheng Wu Xueyou Huang Haiming Li Jian Zhang Binxian Lu Guagnzhou Power Supply CSG North China Electric Power University

The analysis of the impact of the switching impulse voltage on the internal electric field of the cable joint plays a key role in studying the breakdown of the *** this paper,the finite element method is used to simulate the transient electric field of the axisymmetric model of the cable *** changing the closing moment,the influence of different closing moments on the electric field intensity distribution is studied and *** results show that under the switching voltage excitation,when the closing moment at t0=nT,the electric field distribution in the cable joint is consistent with the steady state without ***,the point near the root of the stress cone will distort when the switch is closed,the closing moment is at 7.5 ms,which is the most *** closing time is at 10 ms,has the greatest influence on the electric field intensity distribution in the cable joint,especially the stress cone end,the bottom of the high voltage shield and the position near the high voltage conductor in the air domain.

关键词： cable joint switching impulse voltage electric field intensity distribution finite element method

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Simulation of Electric Field Distribution in cable joint under the Influence of Metal Particle

Simulation of Electric Field Distribution in Cable Joint und...

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作者： Zheng Wu Mingyan Wu Ruxin Zhang Lei Liao Gang Du Xueyou Huang Wenpei Jin Ji'an Zhang Haiming Li Binxian Lu Guagnzhou Power Supply CSG

The middle joint of 10 kV cable is a kind of cable accessory that needs to be installed *** conditions may cause defects in the joints during *** to the small size of some defects,it is impossible to obtain accurate results when simulating them with all simulation domain *** this paper,an accurate model is established to accurately calculate the distribution of electric field around particles in the whole model,and the error in the central region of the model is less than 6.5%.When there are metal particles on the main insulation surface of the cable,this accurate model is applied for analysis,and the maximum electric field intensity around the metal particles is calculated to be 7 kV/mm,which is 3.8 times larger than normal.

关键词： Numerical interpolation Finite element method cable joint Metal particle Accurate model

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