logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12237663 B1

PDFFull Text
Date of Patent:
Feb. 25, 2025

Filed:

Mar. 09, 2023

Line protection method and related apparatus for flexible grounding system of power distribution network

Applicant:

Electric Power Research Institute of Yunnan Power Grid Co., Ltd, Yunnan, CN;

Inventors:

Hongwen Liu, Yunnan, CN;

Xianping Zhao, Yunnan, CN;

Jindong Yang, Yunnan, CN;

Chenchao Chai, Yunnan, CN;

Lijun Tang, Yunnan, CN;

Ding Nie, Yunnan, CN;

Quancong Zhu, Yunnan, CN;

Yongjie Nie, Yunnan, CN;

Dexu Zou, Yunnan, CN;

Shaolei Zhai, Yunnan, CN;

Zhilei Zhang, Yunnan, CN;

Assignee:

Electric Power Research Institute of Yunnan Power Grid Co., Ltd, Yunnan, CN;

Attorney:

JCIPRNET

Primary Examiner:

Bryan R Perez

Int. Cl.
CPC ...
H02H 3/16 (2006.01); H02H 3/00 (2006.01); H02H 7/28 (2006.01);
U.S. Cl.
CPC ...
H02H 3/165 (2013.01); H02H 3/006 (2013.01); H02H 7/28 (2013.01);
Abstract

The embodiments of the present invention disclose a line protection method and a related apparatus for a flexible grounding system of a power distribution network. The method comprises outputting a first compensation voltage by a voltage source of a flexible grounding device of each line of a target power distribution network in the case where a ground fault occurs in the target power distribution network; starting to calculate the zero-sequence impedance of each line in real time by the zero-sequence impedance protection device; after the first compensation voltage is output for a first output duration, outputting a second compensation voltage; calculating the zero-sequence impedance of each line in real time by the line zero-sequence impedance protection device; determining a fault line by the zero-sequence impedance protection device, and cutting off the fault line to isolate the ground fault after a trip for a preset time delay.

Find Patent Forward Citations

Liu, Hongwen. (2025). Line protection method and related apparatus for flexible grounding system of power distribution network (U.S. Patent No. 12237663). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12237663

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…