Method for analyzing correlation between rail transit and direct current (DC) magnetic bias of transformer

US11815564B2 · kind B2 · utility

Assignees

• State Grid Hubei Electric Power Research Institute · CN
• State Grid Hubei Wuhan Electric Power Supply Company · CN
• Wuhan Power Supply Design Institute Co., Ltd. · CN
• State Grid Hebei Electric Power Co., Ltd. · CN
• CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP CO., LTD. · CN
• Wuhan Xindian Electric Co., Ltd. · CN
• Shenzhen Metro Construction Group Co., Ltd. · CN

Inventors

• Zeyang Tang · Hubei, CN
• Ling Ruan · Hubei, CN
• Yong Yao · Nanjing, CN
• Jian Wang · Beijing, CN
• Shuang Chen · Hubei, CN
• Chao Cai · Los Altos Hills, US
• Zhi Tian · Shanghai, CN
• Lingxiao Gao · Hubei, CN
• Xiaoxun Deng · Hubei, CN
• Zhichun Yang · Hubei, CN
• Ling Qiu · Hefei, CN
• Zhou Ge · Longbeilingcun, CN

Key dates

• Filing date: Aug 11, 2021
• Grant date: Nov 14, 2023
• Expiry date: Jun 4, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R19/0092
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for analyzing a correlation between rail transit and direct current (DC) magnetic bias of a transformer includes the steps of, A: obtaining a current of a feed cable and a DC magnetic bias current: measuring the feed cable current 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; C: calculating a characteristic quantity of the DC magnetic bias current within the measurement period based on the DC magnetic bias current; and D: calculating a support degree and a confidence coefficient based on the calculated characteristic quantity of the feed current and the calculated characteristic quantity of the DC magnetic bias current, and generating a correlation rule.