Evaluation Model of DC Current Distribution in AC Power Systems Caused by Stray Current of DC Metro Systems

被引：43
作者：
Wang, Aimin [1 ]
Lin, Sheng [1 ]
Hu, Ziheng [2 ]
Li, Junyi [1 ]
Wang, Feng [1 ]
Wu, Guoxing [2 ]
He, Zhengyou [1 ]
机构：
[1] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Peoples R China
[2] Shenzhen Power Supply Bur CO LTD, China Southern Power Grid, Shenzhen 518000, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2021年 / 36卷 / 01期
基金：
中国国家自然科学基金;
关键词：
DC metro system; stray current; AC power system; coupled simulation model; dc current distribution; BIAS;
D O I：
10.1109/TPWRD.2020.2975367
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
With the rapid development of the DC metro system, the stray current may bring new challenges to the AC power system. Especially, the stray current of the DC metro system flowing in the AC power system may cause many serious consequences such as the corrosion of the grounding grids, plenty of harmonics, and the dc bias of transformers. Therefore, it is significant to evaluate the dc current distribution in the AC power system caused by the stray current. In order to evaluate the dc current distribution, a coupled simulation model both considering the DC metro system and the AC power system is proposed in this paper. Moreover, the earth and the grounding system are both used as the coupling elements in the proposed model. The correctness of the proposed model is verified by the comparison of the calculation results and the field test data. Furthermore, based the proposed model, the dc current distribution in the AC power system is evaluated and analyzed. The results indicate that the dc current distribution is affected by the trains operating conditions and the relative position between the DC metro system and the AC power system.
引用
收藏
页码：114 / 123
页数：10
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