Influence of HVDC Vertical Earthing Electrode Structure on Current Releasing Density
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摘要: [目的] 垂直型直流接地极的溢流密度是关乎接地极性能的关键参数,因此电极结构对溢流密度的影响值得研究。 [方法] 针对垂直接地极的结构特点,分析了子电极数量、子电极长度、子电极间的间隙距离、电极井截面对溢流密度大小和均匀程度的影响。 [结果] 研究表明:溢流密度大小与子电极总长度有关,与子电极分段数量和间隙距离几乎无关;而溢流不均匀程度与间隙距离和电极井截面有关。 [结论] 结合计算分析结果提出了优化的垂直型电极结构。Abstract: [Introduction] The current releasing density is one of the key parameters for the performance of DC vertical earthing electrode. [Method] Based on the structure characteristics of vertical DC earthing electrode, study of the influence of sub-electrodes number, sub-electrodes length, sub-electrodes gap distance and electrode well section on the current releasing density and its evenness were carried out. [Result] The study shows that the current releasing density is related to the total length of sub-electrodes, and it is not related to the number of sub-electrodes and the gap distance between them. However, the unevenness of current releasing density is related to the gap distance and the electrode well section. [Conclusion] Optimized vertical electrode structure is presented according to the study results.
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Key words:
- DC vertical ground electrode /
- current releasing density /
- electrode well /
- sub-electrode
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