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.:
Date of Patent:
May. 24, 2022
Filed:
Apr. 01, 2019
Nr Electric Co., Ltd, Jiangsu, CN;
Nr Engineering Co., Ltd, Jiangsu, CN;
Yeyuan Xie, Jiangsu, CN;
Haiying Li, Jiangsu, CN;
Yu Wang, Jiangsu, CN;
Zhongfeng Zhang, Jiangsu, CN;
Dongming Cao, Jiangsu, CN;
NR ELECTRIC CO., LTD, Jiangsu, CN;
NR ENGINEERING CO., LTD, Jiangsu, CN;
Abstract
A multi-voltage level direct current grid system and a control protection method, the direct current grid system comprising: at least two direct current buses; at least one direct current transformer, one end of which is connected to a first direct current bus while another end is connected to a second direct current bus or a lead-out wire, which may achieve direct current voltage conversion; and at least one lead-out wire current limiter, one end of the lead-out wire current limiter being connected to the second direct current bus while another end is connected to the lead-out wire; the lead-out wire current limiter comprises a first current-limiting unit, and the first current limiting unit comprises a group of direct current switches, as well as a first bypass switch and a first current-limiting resistor unit that are connected in parallel.