US 11,749,985 B2
Method and device for timing in time-varying distance protection based on multiple lines in tower
Zexin Zhou, Beijing (CN); Tianhua Li, Beijing (CN); Hong Cao, Beijing (CN); Yarong Guo, Beijing (CN); Xingguo Wang, Beijing (CN); Dingxiang Du, Beijing (CN); Delin Wang, Beijing (CN); Pengfei Lv, Beijing (CN); and Zhi Zhang, Beijing (CN)
Assigned to CHINA ELECTRIC POWER RESEARCH INSTITUTE, Beijing (CN); and STATE GRID CORPORATION OF CHINA, Beijing (CN)
Appl. No. 17/596,623
Filed by CHINA ELECTRIC POWER RESEARCH INSTITUTE, Beijing (CN); and STATE GRID CORPORATION OF CHINA, Beijing (CN)
PCT Filed Oct. 31, 2019, PCT No. PCT/CN2019/114594
§ 371(c)(1), (2) Date Dec. 14, 2021,
PCT Pub. No. WO2021/008002, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 201910641081.6 (CN), filed on Jul. 16, 2019.
Prior Publication US 2022/0239093 A1, Jul. 28, 2022
Int. Cl. H02H 7/26 (2006.01); H02H 1/00 (2006.01)
CPC H02H 7/263 (2013.01) [H02H 1/0061 (2013.01); H02J 2203/20 (2020.01)] 11 Claims
OG exemplary drawing
 
1. A method for timing in time-varying distance protection based on multiple lines of a tower, comprising:
collecting an instantaneous current value at a time-varying distance protection installation location in the multiple lines of the tower, and acquiring preset parameters;
calculating, according to the preset parameters and a multi-line ranging model, a multi-line ranging result;
calculating, according to the preset parameters, the multi-line ranging result, and an adaptive calculation model, time tII of a section-II distance protection action and final time tIII of a section-III distance protection action; and
determining, according to the instantaneous current value, the preset parameters, and a cross-line failure auxiliary criterion model, final time t′II of the section-II distance protection action.