Testing device for simulating process of triggering trip by transmission line forest fire

Abstract

The invention discloses a testing device for simulating the process of triggering trip by transmission line forest fire. The testing device for simulating the process of triggering the trip by the transmission line forest fire comprises a voltage regulator (1), a voltage booster (2) and a current protector (7). The output end of the current protector (7) is connected with the input end of the voltage regulator (1). The output end of the voltage regulator (1) is connected with the input end of the voltage booster (2). The output end of the voltage booster (2) is connected with a wire (6). A first insulator string (3) and a second insulator string (4) are in radial parallel between the wire (6) and a metal rod (5). The testing device for simulating the process of triggering the trip by the transmission line forest fire can be used for researching the discharge breakdown feature of a 220 kV transmission line under a multi-point combustion condition, can simulate an onsite forest fire environment to reproduce the process of triggering the trip by the 220 kV transmission line forest fire and can provide theoretical support and technical guidance for the design of a transmission line and forest fire preventing work.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and relates to a simulation test device for tripping caused by mountain fires on transmission lines, and a simulation test device for tripping caused by mountains fires caused by large-capacity 220kV transmission lines that can simulate the actual environment. Background technique [0002] Frequent wildfires on transmission lines seriously affect safe operation. Therefore, it is of great theoretical and technical value to study the discharge breakdown mechanism of transmission lines under wildfire conditions, but it is only necessary to establish a simulation test device. Some foreign universities and scientific research units have built small-scale test platforms to study the insulation level of transmission lines in flames, the distortion characteristics of electric fields near wires in flame environments, and the triggering of discharges caused by particles. However, most of th...

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Problems solved by technology

However, most of the research work carried out at home and abroad is based on the small-scale tripping test platform in the laboratory, so there will inevitably be defects.

Defect 1, the voltage level is low, far less than the actual operating voltage of the line, and there is a significant difference in the breakdown characteristics of the mountain fire discharge of the transmission line with the actual operating high voltage level, which cannot effectively guide the actual work of preventing mountain fires; Defect 2, the combustion fire source used for the test It is a single wood stack fire, but in the actual operation of the transmission line, the burning materials below are mostly shrubs, weeds or a mixture of various burning materials. In the past, the wood stack fire was used as a simulation test for mountain fire tripping. There is a significant deviation from the actual situation. Related research The conclusion is difficult to guide the safe production of power grid

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