YUE Yishi, ZHOU Nianguang, ZOU Yanhui, et al. Research on the effects of Jiu—Hu HVDC project on transformer DC bias in Hunan power grid[J]. 2016, 36(3): 5-8.
YUE Yishi, ZHOU Nianguang, ZOU Yanhui, et al. Research on the effects of Jiu—Hu HVDC project on transformer DC bias in Hunan power grid[J]. 2016, 36(3): 5-8.DOI:
In order to analyze DC bias problem generated by Jiu—Hu HVDC project
based on field-circuit coupling method
direct current distribution model of Hunan AC power grid is established and typical soil resistance model in Hunan is acquired by measuring. The effectiveness of modeling method is verified through test model. The DC magnetic bias condition of substations on 220kV or above in Hunan power grid by injecting 5000 A DC current through DC grounding electrode is calculated and the results are analyzed and discussed.