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高压交流输电线路曝露场强限值下人体感应电场和感应电流分析

DOI: 10.13336/j.1003-6520.hve.2015.05.030, PP. 1637-1643

Keywords: 高压交流输电线路,曝露限值,人体,感应电场,感应电流,感应电荷密度,感应电流密度

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Abstract:

人体处于高压交流输电线路下方时,会产生静电感应和电磁感应。当感应电压和感应电流数值过大时,会对人体造成伤害,为此国际非电离辐射防护委员会(ICNIRP)以及IEEE规定了人体在高压输电线路不同曝露情形下的曝露场强限值。首先运用有限元法,考虑人体对地绝缘和人体接地2种情况,分析了高压输电线路曝露场强典型限值下人体所产生的感应电压和感应场强的大小;接着利用解析法计算了不同曝露限值下的人体感应电流、感应电荷密度以及感应电流密度;最后将计算结果与ICNIRP导则给出的曝露限值进行了比较。结果表明,人体处于职业曝露限值场强10kV/m下,人体内部最大感应场强为2.082×10-3kV/m,感应电流密度为0.176mA/m2,接近或低于ICNIRP导则规定的限值范围,不会对人体造成不适感。

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