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:
Apr. 23, 2019
Filed:
Apr. 06, 2017
Nr Electric Co., Ltd, Nanjing, CN;
Nr Engineering Co., Ltd, Nanjing, CN;
Zhaoqing Hu, Nanjing, CN;
Yunlong Dong, Nanjing, CN;
Yu Lu, Nanjing, CN;
Haiying Li, Nanjing, CN;
Dongming Cao, Nanjing, CN;
NR ELECTRIC CO., LTD, Nanjing, CN;
NR ENGINEERING CO., LTD, Nanjing, CN;
Abstract
According to the overload current limiting method for a voltage source converter, when a pole control system receives a water-cooling overload current limiting instruction, an active and reactive instruction are changed at the same time according to a specified slope, so that an absolute value of an arm current of the converter decreases in a fixed slope, and can be ensured that active power and reactive power fall to zero at the same time, and a water-cooling load limiting aim of the converter can be achieved by reducing the arm current. After a water-cooling overload power limiting instruction received by the pole control system is cancelled, a current value of the active power and the inactive power remain unchanged. When a water-cooling overload power limiting instruction is received again, decrease continues on the basis of current power values until the power falls to zero.