Power equipment partial discharge multi-channel optical detection system based on emission spectroscopy

Abstract

The invention discloses a power equipment partial discharge multi-channel optical detection system based on emission spectroscopy. An optical fiber (1) acquires an optical radiation signal generated by partial discharge of power equipment and transmits the optical signal to an optical fiber coupler (2) outside the power equipment; the optical fiber coupler (2) splits the optical signal to N detection channels, and after the optical signal of each detection channel passes through a narrow-band optical filter (3), only the optical signal of the characteristic spectrum band is reserved and is collected and extracted by a high-sensitivity photoelectric detector (4). The high-sensitivity photoelectric detector (4) transmits the acquired spectral information and relative intensity of each characteristic spectrum band to an A / D conversion module (5) in the form of analog signals; the A / D conversion module (5) converts analog signals into digital signals and transmits the digital signals to acommunication protocol conversion card (6), the communication protocol conversion card (6) sends the data signals to a remote monitoring computer (7) for optical signal analysis, and partial dischargefault diagnosis is carried out according to the optical signal analysis.

Description

technical field [0001] The invention relates to a multi-channel optical detection system for electric equipment. Background technique [0002] With the development of industry and social progress, the power system is developing in the direction of large capacity and ultra-high voltage, and the people have higher and higher requirements for the reliability of the system operation. Various types of high-voltage power equipment represented by insulating switches, transformers, and pipeline busbars are important components of the power system. After long-term insulation aging, the probability of breakdown, flashover and other insulation faults in power equipment has increased significantly, posing a serious threat to the safe and stable operation of the power system. Partial discharge is the precursor and manifestation of various insulation faults, and it is also the main criterion and diagnostic object of insulation defects in power equipment. [0003] When partial discharge ...

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Problems solved by technology

At present, the optical detection method of partial discharge is still in the stage of laboratory research. Although the spectral characteristics and diagnostic criteria of various types of insulation defects are gradually being proposed, due to the lack of on-line detection equipment or detection systems for power equipment operating sites, optical The engineering application and promotion of the detection method in the partial discharge detection of power equipment has been restricted by many

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