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:
Feb. 26, 2019
Filed:
Nov. 24, 2015
Nr Electric Co., Ltd., Nanjing, Jiangsu, CN;
Nr Engineering Co., Ltd., Nanjing, Jiangsu, CN;
Yunlong Dong, Jiangsu, CN;
Jie Tian, Jiangsu, CN;
Dongming Cao, Jiangsu, CN;
Haiying Li, Jiangsu, CN;
Jiudong Ding, Jiangsu, CN;
Zhaoqing Hu, Jiangsu, CN;
Gang Li, Jiangsu, CN;
Haibin Liu, Jiangsu, CN;
Yu Lu, Jiangsu, CN;
NR ELECTRIC CO., LTD., Nanjing, Jiangsu, CN;
NR ENGINEERING CO., LTD., Nanjing, Jiangsu, CN;
Abstract
The present invention provides a method for inhibiting multiple inverter stations from entering a passive control mode in an island state. The method includes dividing inverter stations into groups in advance; a principle for group division is dividing inverter stations whose alternating-current sides are connected to each other through an alternating-current line in a normal running condition into a group; priorities of the inverter stations are preset in each group to tune relevant fixed values of the inverter stations for island detection; a tuning principle is that an inverter station with a higher priority has a more sensitive relevant fixed value, and an island state is more easily detected for the corresponding inverter station; an inverter station for which an island state is detected can enter a passive control mode only when all the other inverter stations with priorities higher than the priority of the inverter station in the group send enabling signals.