Analysis of Safety Protection Measures for Maintenance Work of 500 kV Double-Circuit Transmission Lines on Same Tower

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

Yang, Qi^1 ; Zou, Dehua^1 ; Zhang, Jianjun^1 ; Li, Hui^1 ; Chen, Jianping^1 ; Li, Jinliang^1

Live Working Center of State Grid Corporation of Hunan, Changsha

410100, China^1

关键词: Double-circuit transmission line on the same towers;    Double-circuit transmission lines;    Economic and social benefits;    Field intensity distribution;    Finite element software;    Four transmission lines on the same towers;    Security requirements;    Shielding efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012127/pdf
DOI  :  10.1088/1757-899X/199/1/012127

来源: IOP

【 摘 要 】

Four transmission lines on the same tower are widely used because of their obvious economic and social benefits. But it also has high power supply reliability, so the choice of reasonable maintenance mode is particularly important. In this paper, we deducted the maintenance influence of the energized line to non-energized line, calculated and analyzed protection measures of non-energized singular line of 500kV double-circuit transmission line on the same tower with ATP software, and calculated field intensity distribution of typical operating position of the energized double-circuit transmission line with the finite element software. The calculation shows that when using the outage maintenance method, hanging both ground current and personal security line can reduce the current flowing through the operator's body effectively. When using the live maintenance method, the field intensity of operator body strengths up to 383.69kV/m, The operator needs to wear shielding cloth with at least 43.08 dB shielding efficiency, in order to meet the security requirements.