Title:
METHOD AND APPARATUS FOR PROCESSING TRANSMISSION DATA OF LINE-PROTECTION FIBER CHANNEL
Document Type and Number:
WIPO Patent Application WO/2022/179111
Kind Code:
A1
Abstract:
Disclosed are a method and apparatus for processing transmission data of a line-protection fiber channel, the method comprising: acquiring a numerical value of a data frame format in a communication message sent by an opposite side; when the numerical value is a first preset numerical value, apparatuses on both sides of a fiber channel periodically sending sampling data and switch quantity data after sampling is interrupted; when the numerical value is a second preset numerical value, sending, to the opposite side, sampling data of the previous frame that has been checked to be abnormal, a sampling sequence number, and the sampling data of the current frame; when the numerical value is a third preset numerical value, performing phasor calculation on the sampling data of a 1/4 cycle before an abnormal frame, sending a real part and an imaginary part of a three-phase current and a corresponding sampling sequence number to the opposite side, and using a current phasor of a local side and a current phasor of the 1/4 cycle of the opposite side to synthesize a differential current and a braking current that are used for differential protection. Sampling data is sent after sampling is interrupted, and when consecutive two data abnormalities are detected, a phasor is calculated using a current sampling value of a 1/4 cycle and is transferred to an opposite side, thereby reducing the influence of an accidental communication abnormality of a fiber channel on differential protection.
Inventors:
LI XU (CN)
LI BAOWEI (CN)
NI CHUANKUN (CN)
DONG XINTAO (CN)
FANG ZHENG (CN)
TANG YANMEI (CN)
JIANG ZIQIANG (CN)
HAO HUIZHEN (CN)
DU LEI (CN)
TENG CHENXU (CN)
WANG ZHENYU (CN)
LI BAOWEI (CN)
NI CHUANKUN (CN)
DONG XINTAO (CN)
FANG ZHENG (CN)
TANG YANMEI (CN)
JIANG ZIQIANG (CN)
HAO HUIZHEN (CN)
DU LEI (CN)
TENG CHENXU (CN)
WANG ZHENYU (CN)
Application Number:
PCT/CN2021/122670
Publication Date:
September 01, 2022
Filing Date:
October 08, 2021
Export Citation:
Assignee:
XJ GROUP CORP (CN)
XJ ELECTRIC CO LTD (CN)
XUCHANG XUJI SOFTWARE TECH CO LTD (CN)
XJ ELECTRIC CO LTD (CN)
XUCHANG XUJI SOFTWARE TECH CO LTD (CN)
International Classes:
H02H7/26; H02H1/00; H04B10/032; H04B10/25; H04L1/00
Foreign References:
| CN113013852A | 2021-06-22 | |||
| CN111130070A | 2020-05-08 | |||
| CN107276053A | 2017-10-20 | |||
| CN102946274A | 2013-02-27 | |||
| CN112188420A | 2021-01-05 | |||
| US20120063316A1 | 2012-03-15 |
Other References:
ZHANG ZHAOYUN, LIU HONGJUN: "A New Synchronization Method of Optical Fiber Line Differential Protection for Digital Substation", AUTOMATION OF ELECTRIC POWER SYSTEMS, NANJING ZIDONGHUA YANJIUSUO, NANJING, CN, vol. 34, no. 22, 25 November 2010 (2010-11-25), CN , pages 90 - 92, XP055962104, ISSN: 1000-1026
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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