US 11,815,564 B2
Method for analyzing correlation between rail transit and direct current (DC) magnetic bias of transformer
Zeyang Tang, Hubei (CN); Ling Ruan, Hubei (CN); Yong Yao, Hubei (CN); Jian Wang, Hubei (CN); Shuang Chen, Hubei (CN); Chao Cai, Hubei (CN); Zhi Tian, Hubei (CN); Lingxiao Gao, Hubei (CN); Xiaoxun Deng, Hubei (CN); Zhichun Yang, Hubei (CN); Ling Qiu, Hubei (CN); and Zhou Ge, Guangdong (CN)
Assigned to State Grid Hubei Electric Power Research Institute, Wuhan (CN); State Grid Hubei Wuhan Electric Power Supply Company, Wuhan (CN); Wuhan Power Supply Design Institute Co., Ltd., Wuhan (CN); State Grid Hubei Electric Power Co., Ltd., Wuhan (CN); China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan (CN); Wuhan Xindian Electric Co., Ltd., Wuhan (CN); and Shenzhen Metro Construction Group Co., Ltd., Shenzhen (CN)
Appl. No. 17/598,269
Filed by State Grid Hubei Electric Power Research Institute, Hubei (CN); State Grid Hubei Wuhan Electric Power Supply Company, Hubei (CN); Wuhan Power Supply Design Institute Co., Ltd., Hubei (CN); State Grid Hubei Electric Power Co., Ltd., Hubei (CN); China Railway Siyuan Survey and Design Group Co., Ltd., Hubei (CN); Wuhan Xindian Electric Co., Ltd., Hubei (CN); and Shenzhen Metro Construction Group Co., Ltd., Guangdong (CN)
PCT Filed Aug. 11, 2021, PCT No. PCT/CN2021/111970
§ 371(c)(1), (2) Date Sep. 26, 2021,
PCT Pub. No. WO2022/083242, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 202011151504.5 (CN), filed on Oct. 25, 2020.
Prior Publication US 2022/0317205 A1, Oct. 6, 2022
Int. Cl. G01R 31/00 (2006.01); G01R 31/62 (2020.01); G01R 19/00 (2006.01)
CPC G01R 31/62 (2020.01) [G01R 19/0092 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for analyzing a correlation between rail transit and direct current (DC) magnetic bias of a transformer, comprising the following steps:
A: obtaining a current of a feed cable and a DC magnetic bias current: measuring the current of the feed cable in rail transit and the DC magnetic bias current of a transformer in a power grid within a certain period by a monitoring apparatus;
B: calculating a characteristic quantity of the feed current within the measurement period based on the obtained current of the feed cable in step A;
C: calculating a characteristic quantity of the DC magnetic bias current within the measurement period based on the DC magnetic bias current obtained in step A; and
D: calculating a support degree and a confidence coefficient based on the calculated characteristic quantity of the feed current in step B and the calculated characteristic quantity of the DC magnetic bias current in step C, and generating a correlation rule.