Online monitoring system for power transmission line oscillation

A technology for transmission lines and monitoring systems, which is applied in measurement devices, measurement of ultrasonic/sonic/infrasonic waves, and measurement of force by measuring changes in optical properties of materials when they are stressed. On-site power supply and other problems, to achieve the effect of strong anti-electromagnetic interference and overcoming poor anti-electromagnetic interference ability

Inactive Publication Date: 2011-08-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0011] In view of the deficiencies in the existing transmission line galloping monitoring system in the above background technology, such as the need for on-site power supply, susceptibility to electromagnetic interference, and complex structure, the present invention proposes an online monitoring system for transmission line galloping

Method used

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  • Online monitoring system for power transmission line oscillation
  • Online monitoring system for power transmission line oscillation
  • Online monitoring system for power transmission line oscillation

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Embodiment Construction

[0024] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0025] figure 1 It is a schematic diagram according to the present invention, including: a fiber grating tension measuring sensor 1, an optical fiber composite overhead ground wire 2, a dynamic wavelength demodulation system 3 and a monitoring computer 4, wherein:

[0026] Fiber Bragg grating tension measurement sensor 1: used to receive the broadband light from the dynamic wavelength demodulation system 3, and transmit the narrow-band light reflected by the optical signal to the dynamic wavelength demodulation system through the optical fiber composite overhead ground wire 2 3. The elastic body of the optical fiber grating tension measurement sensor is pasted with an optical fiber grating, which reflects the force of...

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Abstract

The invention discloses an online monitoring system for power transmission line oscillation in the technical field of online monitoring of a power transmission line. The system comprises an optical fiber and optical grating tension measurement sensor, an optical fiber composite aerial earth wire, a dynamic wavelength demodulation system and a monitoring computer. The system is used for performing online monitoring on oscillation phenomenon of the power transmission line by utilizing tension dynamic variable information measured by the optical fiber and optical grating tension measurement sensor. The system does not require an on-site power supply, has the characteristics of anti-electromagnetic interference and light intensity variation resistance and can be used for effectively monitoring the power transmission line for a long period of time.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring of power transmission lines, in particular to an on-line monitoring system for galloping of power transmission lines. Background technique [0002] In winter, when the wind in the horizontal direction blows to the wire with a non-circular cross-section due to ice coating, a certain amount of aerodynamic force will be generated, which will induce the wire to produce a low frequency (0.1-3.0 Hz), large amplitude ( The self-excited vibration that can reach more than 10 meters) has a shape of flying up and down, like a dragon dance, called dancing. In addition, galloping may also occur in the case of thin ice or no ice. my country is a country with frequent galloping of overhead transmission lines. In recent years, with the development of power grid construction, overhead transmission lines have developed in the direction of large cross-sections and multiple splits. The safe and stable ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01L1/24
Inventor 马国明李成榕
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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