AUTHOR=Hu Yuanchao , Liu Zhixiang , Huang Tao , An Yunzhu , Shen Wentao , Hu Shangmao , Ma Chenghui , An Bingchen , Chen Dan TITLE=A New Grounding Resistance Reduction Method for Wind Turbines by Grounding Grid Connection in Limited Areas JOURNAL=Frontiers in Energy Research VOLUME=Volume 10 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2022.830628 DOI=10.3389/fenrg.2022.830628 ISSN=2296-598X ABSTRACT=Restricted by cultivated land vegetation, road construction, and land acquisition compensation costs, grounding electrode extension method is not applicable for grounding resistance reduction of some wind turbines in limited area. A new grounding resistance reduction method is proposed and verified for wind turbines by connecting nearby wind turbine grounding grids. To study the efficiency of proposed method, grounding characteristics of connection grounding grid is calculated. Simulation results indicate that the grounding resistance of connection grounding grid is smaller than that of box extension grounding grid. The grounding characteristics of grounding grid connection are affected by grounding current frequency and material parameters. The grounding grid connection increases the current dispersion area and reduces the ground potential rise of grounding conductor.