Ultrahigh-frequency asymmetric biconical antenna for transformer station partial discharge full-station detection

Abstract

The invention provides an ultrahigh-frequency asymmetric biconical antenna for transformer station partial discharge full-station detection. The ultrahigh-frequency asymmetric biconical antenna comprises an upper round table, a lower round table, an upper cylinder and a lower cylinder, wherein the top end of the upper round table and the top end of the lower round table are opposite and are spaced by a gap; the upper cylinder is connected with the upper end surface of the upper round table; the lower cylinder is connected with the lower end surface of the lower round table; and the radius of the upper end surface of the upper round table is smaller than the radius of the lower end surface of the lower round table. The antenna has a work bandwidth of 470MHz to 3GHz, an H-surface directional diagram presents an omnidirectional feature, an E-surface directional diagram presents a cake ring shape in a low frequency range and presents a heart shape in a medium-high frequency range, "upwarping" of directional diagram gain is realized, gain of the antenna in an elevation angel interval of 0 to 60 degrees of a vertical surface is increased, and partial discharge signals of a transformation station can be better received.

Description

technical field [0001] The invention relates to a biconical antenna, in particular to an ultra-high frequency asymmetric biconical antenna for substation partial discharge total station detection. Background technique [0002] Partial discharge is a non-penetrating discharge caused by the strengthening of the electric field strength in a local area or the decline in the ability of the insulating medium to withstand the electric strength due to the existence of insulation defects in the insulation structure, such as floating potential bodies, protruding tips, surface contamination, and internal air gaps. Phenomenon. At present, partial discharge has become a research hotspot in the power industry. The research on partial discharge mainly focuses on detection methods and related signal processing, partial discharge type identification and partial discharge source location. Judging from the current research status, most of the current partial discharge live or on-line detectio...

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Problems solved by technology

Judging from the current research status, most of the current partial discharge live or on-line detection instruments or devices are aimed at a specific high-voltage equipment (such as transformers, GIS, etc.), and the design idea of ​​installing multiple sensors on the equipment body results in the need to carry multiple sets during testing. Different types of instruments are inconvenient to operate, require many sensors, complex installation, high overall cost of instrument purchase, heavy maintenance workload of the detection device itself, and contact with electrical equipment during the detection process

Therefore, the cost performance of the installed system is not high, and at the same time, there are problems that its operating life is not as good as that of primary equipment, and its reliability is not high

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