Abstract
Partial discharge (PD) leads to the generation of electrical, acoustic, optical, and thermal signals. The propagation characteristics of optical signals in gas insulated metal-enclosed transmission lines (GIL) are the basis of optical detection research. This paper simulates the propagation of PD optical signals in GIL through modeling GIL with different structures and specification parameters. By analyzing the optical parameters on the probe surface and the detection points when the PD source position is different, the influence of the difference in specifications caused by the voltage level on the propagation of the GIL PD optical signal is studied. The results show that the GIL cavity structure will affect the faculae distribution and the relative irradiance (RI) of the detection surface; the PD source position has a huge impact on the faculae distribution on the detection surface, but has little influence on the RI; as the voltage rises, the faculae distribution on the detection surface becomes more obvious, and the mean of RI decreases. The above results have the reference value for the manufacture of GIL equipment and the research of PD optical detection. When the specular reflection coefficient of surface material is smaller and the diffuse reflection coefficient is larger, the outline of the light spot is clearer, the proportion of brighter parts is larger, and the maximum value of the RI is larger.
Highlights
As the economy and industry develop rapidly, long-range and high-capacity power transmission technology has received increasing emphasis [1]
Thefigure figureindicates indicatesthat thatthough though the single-core Gas insulated metal-enclosed transmission lines (GIL) and the triple-core GIL possess distinct structure of internal conductor, they share some resemblance with the relative irradiance (RI) generated by the sources around the inside of the shell
When analyzing the light faculae detected on detection surfaces 2 and 3, the comparison was similar to detection surface 1, and will not be repeated here
Summary
As the economy and industry develop rapidly, long-range and high-capacity power transmission technology has received increasing emphasis [1]. Optical detection is adequate for the GIL PD monitoring due to the totally sealed structure This new PD detection technology for power equipment possesses strong anti-interference ability [9]; it has received worldwide attention. [21,22] have carried out simulation and research on the propagation characteristics of PD optical optical signals. There have been no studies on the propagation characteristics of partial discharge discharge light signals in paper. This paper on theideas research ideas and applies themethods research light signals in GIL This draws on draws the research above andabove applies the research methods and simulation ideas to the partial discharge detection of GIL. The results are level and surface material on the PD optical signal propagation in GIL were analyzed. The results are the basis of future research on optical detection, and can be referred during the manufacture the basis of future research on PD optical detection, and can be referred during the manufacture of GIL
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