A method for all-round monitoring and accurate fault point location of submarine photoelectric composite cable
A photoelectric composite cable and accurate positioning technology, which is applied in the field of measurement, can solve the problems of single detection means, the inability to realize submarine photoelectric composite cables, and direct detection of core wire faults and outer layer faults, etc., to achieve the effect of ensuring safe and stable operation
Active Publication Date: 2015-11-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology
[0008] Aiming at the problems of the existing fault detection method mentioned in the background technology that the detection method is single, the core wire fault and the outer layer fault cannot be directly detected, and the fault point of the submarine photoelectric composite cable cannot be accurately located, the present invention proposes a submarine photoelectric Composite cable all-round monitoring and accurate fault location method
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Embodiment
[0046] Embodiment: The determination process of the corresponding relationship between optical fiber and submarine photoelectric composite cable length:
[0047] The optical fiber is stranded in the submarine photoelectric composite cable at a certain pitch, and the theoretical length of the optical fiber is calculated according to the diameter of the submarine photoelectric composite cable and the twisting pitch.
[0048] Optical fiber length = photoelectric composite length of submarine photoelectric composite cable * coefficient * excess length of optical fiber
[0049] Among them, the coefficient = {[(3.14*d) 2 +m 2 ] 1 / 2} / m; d is the diameter of the optical fiber in the submarine photoelectric composite cable, and m is the stranding pitch.
[0050] However, with the influence of coiled cable and excess length, the actual measured optical fiber length is greater than the theoretically calculated optical fiber length. Therefore, it should be combined with the specific p...
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The invention discloses a submarine photoelectric composite cable omni-directional monitoring and fault point accurate positioning method in the technical field of measurement. According to the method, the Brillouin distributed strain / temperature measurement technology is employed, the online monitoring of the real-time operation of a submarine photoelectric composite cable is realized, the real-time operation state information of the submarine photoelectric composite cable is obtained through analyzing Brillouin distributed fiber strain / temperature measurement data and is combined with actual submarine cable state information, submarine photoelectric composite cable routing feature information is extracted, and the detection and accurate positioning of a submarine cable fault point are realized. When the submarine photoelectric composite cable is failed, a megohmmeter is employed to detect the characteristic of the cable fault, the cable fault type is judged, and a time domain reflection method is employed to carry out fault monitoring and position the cable fault point in the photoelectric composite cable. Combined with a fiber fault point obtained through a Brillouin light time domain reflection test and the cable fault point position obtained through the time domain reflection method, the fault point geographical position information of the submarine photoelectric composite cable is accurately obtained.
Description
technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a method for all-round monitoring of a submarine photoelectric composite cable and accurate location of fault points. Background technique [0002] As a large ocean country, my country has a coastline of more than 30,000 kilometers and numerous inland rivers and lakes. As an important means of power communication and signal transmission between coastal islands and cities, submarine photoelectric composite cables are important for ensuring the normal life of island residents and promoting national economic development in coastal areas. , Strengthening the construction of coastal defense is of great significance. [0003] Submarine optical fiber composite power cable (abbreviated as submarine photoelectric composite cable) is a composite cable that can transmit electric energy and realize optical fiber communication. It is safer and more reliable than laying submarin...
Claims
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IPC IPC(8): G01D21/02G01S17/10G01R31/02G01R31/08
Inventor 赵丽娟李永倩翟丽娜
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)