{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T22:47:26Z","timestamp":1776811646997,"version":"3.51.2"},"reference-count":17,"publisher":"European Society of Computational Methods in Sciences and Engineering","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"published-print":{"date-parts":[[2022,5,13]]},"abstract":"<jats:p>With the wide application of high voltage\/ultra-high voltage (HV\/UHV) DC transmission technology, the impact of DC grounding electrode location selection on the surrounding power grid has become increasingly prominent, especially the problem of DC bias hazard caused by DC grounding electrodes at provincial grid boundaries needs to be solved urgently. This paper studies the assessment and prevention of trans-regional DC bias risk, and proposes an inversion method of earth resistivity model based on the measured data of neutral current in the provincial boundary area. Firstly, the DC bias risk of provincial boundary power grid is simulated and calculated, and the influence of reasonable selection of earth model on the accuracy of risk assessment results is explained. Based on the classical Fletcher-Reeves conjugate gradient method and the measured neutral current data, a reduced-order inversion method for the earth resistivity parameters of the provincial boundary power grid is proposed. On this basis, a set of DC bias risk control scheme is formulated for the actual project of Gannan power grid. Finally, the feasibility of the scheme is verified by simulation and measured data.<\/jats:p>","DOI":"10.3233\/jcm-225945","type":"journal-article","created":{"date-parts":[[2022,3,1]],"date-time":"2022-03-01T13:24:49Z","timestamp":1646141089000},"page":"857-869","source":"Crossref","is-referenced-by-count":0,"title":["Assessment and mitigation of DC bias risk in power grids at provincial boundaries"],"prefix":"10.66113","volume":"22","author":[{"given":"Bichuan","family":"Xu","sequence":"first","affiliation":[{"name":"State Grid Jiangxi Electric Power Research Institute, Nanchang, Jiangxi, China"}]},{"given":"Lei","family":"Guo","sequence":"additional","affiliation":[{"name":"State Grid Henan Electric Power Research Institute, Zhengzhou, Henan, China"}]},{"given":"Zhuohong","family":"Pan","sequence":"additional","affiliation":[{"name":"North China Electric Power University (Baoding), Baoding, Hebei, China"}]},{"given":"Yuting","family":"Liu","sequence":"additional","affiliation":[{"name":"State Grid Jiangxi Electric Power Research Institute, Nanchang, Jiangxi, China"}]},{"given":"Tao","family":"Tong","sequence":"additional","affiliation":[{"name":"State Grid Jiangxi Electric Power Research Institute, Nanchang, Jiangxi, China"}]},{"given":"Tangbing","family":"Li","sequence":"additional","affiliation":[{"name":"State Grid Jiangxi Electric Power Research Institute, Nanchang, Jiangxi, China"}]},{"given":"Liang","family":"Ding","sequence":"additional","affiliation":[{"name":"Shaoxing Power Supply Bureau of State Grid Zhejiang Electric Power Co., Shaoxing, Zhejiang, China"}]},{"given":"Hua","family":"Wan","sequence":"additional","affiliation":[{"name":"State Grid Jiangxi Electric Power Research Institute, Nanchang, Jiangxi, China"}]},{"given":"Jing","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Grid Jiangxi Electric Power Research Institute, Nanchang, Jiangxi, China"}]}],"member":"55691","reference":[{"issue":"2","key":"10.3233\/JCM-225945_ref1","doi-asserted-by":"publisher","first-page":"960","DOI":"10.1109\/TPWRD.2007.908748","article-title":"Numerical analysis of dc current distribution in ac power system near HVDC system","volume":"23","author":"Zhang","year":"2008","journal-title":"IEEE Transactions on Power Delivery."},{"issue":"1","key":"10.3233\/JCM-225945_ref2","doi-asserted-by":"publisher","first-page":"165","DOI":"10.1109\/TPWRD.2015.2445913","article-title":"HVDC ground return current modeling in ac systems considering mutual resistances","volume":"31","author":"Pan","year":"2016","journal-title":"IEEE Transactions on Power Delivery."},{"issue":"3","key":"10.3233\/JCM-225945_ref3","first-page":"1","article-title":"Analysis and Treatment of \u00b1 800\u00a0kV Jinbei-Nanjing UHVDC Transmission Impact on DC Magnetic Bias of AC Transformer in Anhui Power Grid","volume":"23","author":"Qiu","year":"2018","journal-title":"Journal of Anhui Vocational and Technical College of Electrical Engineering."},{"key":"10.3233\/JCM-225945_ref4","doi-asserted-by":"publisher","DOI":"10.13334\/j.0258-8013.pcsee.170572"},{"key":"10.3233\/JCM-225945_ref5","doi-asserted-by":"publisher","DOI":"10.13334\/j.0258-8013.pcsee.182115"},{"issue":"7","key":"10.3233\/JCM-225945_ref6","doi-asserted-by":"publisher","first-page":"2331","DOI":"10.13336\/j.1003-6520.hve.20170628031","article-title":"Computation for wide-area direct current distribution of power grids considering deep earth resistivity","volume":"43","author":"Wen","year":"2017","journal-title":"High Voltage Engineering."},{"issue":"6","key":"10.3233\/JCM-225945_ref7","doi-asserted-by":"publisher","first-page":"2500","DOI":"10.1109\/TPWRD.2017.2649582","article-title":"Advanced dc bias suppression strategy based on finite dc blocking devices","volume":"32","author":"Xie","year":"2017","journal-title":"IEEE Transactions on Power Delivery."},{"issue":"2","key":"10.3233\/JCM-225945_ref8","doi-asserted-by":"publisher","first-page":"861","DOI":"10.1109\/TPWRD.2017.2715040","article-title":"Enhanced independent pole control of hybrid MMC-HVdc system","volume":"33","author":"Xiang","year":"2018","journal-title":"IEEE Transactions on Power Delivery."},{"issue":"4","key":"10.3233\/JCM-225945_ref9","doi-asserted-by":"publisher","first-page":"1835","DOI":"10.1109\/TPWRD.2012.2205409","article-title":"Vibration and audible noise characteristics of ac transformer caused by HVDC system under mono-pole operation","volume":"27","author":"He","year":"2012","journal-title":"IEEE Transactions on Power Delivery."},{"issue":"3","key":"10.3233\/JCM-225945_ref12","doi-asserted-by":"publisher","first-page":"1848","DOI":"10.1093\/gji\/ggv256","article-title":"Earth \u2013 ionosphere\u2019 mode controlled source electromagnetic method","volume":"202","author":"Li","year":"2015","journal-title":"Geophysical Journal International."},{"key":"10.3233\/JCM-225945_ref13","unstructured":"Zhdanov MS. 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