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:
Mar. 03, 2016
Shanghai Chint Power Systems Co., Ltd., Shanghai, CN;
SHANGHAI CHINT POWER SYSTEMS CO., LTD., Shanghai, CN;
Abstract
A direct current (DC) fault arc detection method, including performing sampling, filtering and fast Fourier transform (FFT) on an input current of a high frequency power electronics converter, to obtain an amplitude-frequency characteristic curve of a current high frequency component; and selecting, from the amplitude-frequency characteristic curve, at least one frequency band including a switching frequency or a multiple frequency, calculating a peak value Dof amplitudes and an average value Dof the amplitudes within the frequency band, and determining, according to a change of a distance between the peak value Dand the average value D, whether an arc occurs, where if the average value Dapproaches the peak value D, an arc occurs; otherwise, no arc occurs.