接地網(wǎng)不等電位數(shù)值計(jì)算方法
王成,葛強(qiáng),徐燕,耿夢(mèng)儒,謬?yán)?br />
(揚(yáng)州大學(xué) 水利與能源動(dòng)力工程學(xué)院,江蘇 揚(yáng)州 225127)
摘 要:介紹了導(dǎo)體的自阻與互阻的計(jì)算方法,分析了接地網(wǎng)不等電位的數(shù)學(xué)模型。通過節(jié)點(diǎn)電壓法,得到按照指數(shù)函數(shù)規(guī)律布置接地導(dǎo)體可以降低接地網(wǎng)接觸電壓的結(jié)論。結(jié)果表明:采用不等間距布置方法可以使得電位分布更加均勻,確保人身安全與系統(tǒng)可靠的運(yùn)行。
關(guān)鍵詞:接地網(wǎng);節(jié)點(diǎn)電壓法;接觸電壓;不等電位;不等間距
中圖分類號(hào):TM645 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2017)01-0022-04
Calculation Method of Grounding Grid with Unequal Potential Model
WANG Cheng, GE Qiang, XU Yan, GENG Meng-ru, MIU Li-rong
(School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)
Abstract: Introduction was made to the calculation method of self-resistance and mutual resistance. This paper analyzed the mathematical model of the grounding grid with unequal potential. The node voltage method was used to conclude that the arranged grounding conductor could reduce the contact voltage of the grounding grid according to the exponential function rule. The results show that the unequal spacing method can make the potential distribution more uniform and ensure the personal safety and the reliable operation of the system.
Key words: grounding grid; node voltage method; contact voltage; unequal potential; unequal spacing
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