Title:
FAULT MONITORING METHOD FOR MULTI-PORT INTERNAL PASSIVE LOAD-FREE PROBABILISTIC LOAD FLOW ELECTRIC NETWORK
Document Type and Number:
WIPO Patent Application WO/2022/227817
Kind Code:
A1
Abstract:
Disclosed in the present invention is a fault monitoring method for a multi-port internal passive load-free probabilistic load flow electric network. The method comprises: providing a current transformer on a wire; converting a current amount of the current transformer into a voltage amount, and then converting the voltage amount into pulses by means of a voltage-frequency conversion circuit; transmitting the pulses to a comparison module by means of an optical fiber, and calculating an algebraic sum for the number of all pulses; specifying that the number of pulses is positive when an installation direction of the current transformer is the same as the direction in which a port points to a probabilistic load flow electric network, and is negative when the two directions are opposite; and when the algebraic sum exceeds a threshold value, determining that a fault occurs inside the probabilistic load flow electric network. By means of the method, with regard to an electric network where the direction of electric energy transmission is uncertain, whether faults such as single-phase grounding and inter-phase short circuiting occur inside the electric network can be accurately detected in a timely manner, which has the advantages of fast response to faults, and accurate and timely determination.
Inventors:
XUE ZHANYU (CN)
XING JINCHUN (CN)
XING JINCHUN (CN)
Application Number:
PCT/CN2022/077125
Publication Date:
November 03, 2022
Filing Date:
February 21, 2022
Export Citation:
Assignee:
BAODING YUXIN ELECTRIC TECH CO LTD (CN)
International Classes:
H02H1/00; H02H3/30; H02H7/26
Foreign References:
| CN114039326A | 2022-02-11 | |||
| CN215599285U | 2022-01-21 | |||
| CN111463758A | 2020-07-28 | |||
| CN108206523A | 2018-06-26 | |||
| US20030105608A1 | 2003-06-05 |
Other References:
LIANG YING: "Application of Stochastic Load Flow in Security Risk Assessment of Transmission Network", JOURNAL OF NORTH CHINA ELECTRIC POWER UNIVERSITY(NATURAL SCIENCE EDITION), vol. 43, no. 4, 30 July 2016 (2016-07-30), pages 72 - 78, XP055980721, ISSN: 1007-2691, DOI: 10.3969/j.issn.1007-2691.2016.04.12
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