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. 10, 2022
Filed:
Apr. 27, 2018
Nr Electric Co., Ltd, Jiangsu, CN;
Nr Engineering Co., Ltd, Jiangsu, CN;
Ke Wang, Jiangsu, CN;
Shunke Sui, Jiangsu, CN;
Yu Lu, Jiangsu, CN;
Yunlong Dong, Jiangsu, CN;
Zhaoqing Hu, Jiangsu, CN;
Gang Li, Jiangsu, CN;
NR ELECTRIC CO., LTD, Jiangsu, CN;
NR ENGINEERING CO., LTD, Jiangsu, CN;
Abstract
During initiation under an isolated island condition, the amplitude of a voltage reference wave output generated by a flexible DC transmission control and protection system is in a segmented mode, wherein a first segment of the reference wave amplitude begins at zero or a fixed value Uand rapidly increases to UkV at a rate of a kV/s, avoiding a low output voltage reference wave and high error and harmonic content of a sampled voltage and current. A second segment increases to UkV at a rate of β kV/s, a third segment increases to UkV at a rate of γ kV/s, and the Nsegment increases to a rated voltage of UkV at a rate of ε kV/s, thereby achieving non-disturbance and shockless initiation of a flexible DC transmission system under an isolated island condition.