Ion spatial electric current density-based direct current transmission line mountain fire monitoring device

Abstract

The invention discloses an ion spatial electric current density-based direct current transmission line mountain fire monitoring device which comprises an ion electric current density and environment parameter monitoring module for measuring ion electric current density, wind speed and wind direction, temperature, humidity and atmospheric pressure of a direct current transmission line, a mountain fire judging and early-warning module for judging whether a mountain fire exists or not according to the ion electric current density and the environment parameter, a communication module for transiting early warning information and receiving status instructions of the ion electric current density and environment parameter monitoring module, a control center for receiving the early warning information from the communication module to control each status instruction and acousto-optic alarm instruction of the ion electric current density and environment parameter monitoring module, and an acousto-optic alarm module for informing operators to report to power dispatching persons whether to stop using the line or dispatch line maintainers to remove hidden danger or not according to the early warning information received by the control center. The device is convenient to use and maintain, can stably monitor the basic environment parameters around the direct current transmission line running in case of high voltage such as wind speed, wind direction, temperature, humidity, atmospheric pressure and the like, computes the ion electric current density nearby measure points according to the basic parameters such as the wind speed and the wind direction, judges the mountain fire nearby the transmission line according to the ion electric current density, transmits the alarm information to the control center by the wireless communication unit, and timely prompts operators on duty by the acousto-optic alarm information which cooperatively controls a master computer.

Description

technical field [0001] The invention relates to the technical field of transmission lines, in particular to a direct current transmission line mountain fire monitoring device based on space ion current density. Background technique [0002] Since 2005, there have been 8 mountain fire failures in the transmission lines maintained by Hubei Power Transmission and Transformation Engineering Company. Mountain fires caused line trips and brought a serious threat to the safe and stable operation of the power grid. In the first quarter of 2010, there were 262 fault trips on 220kV and above lines in China Southern Power Grid, including 113 trips on 500kV lines, accounting for 43.13%; 149 trips on 220kV lines, accounting for 56.87%. There were 128 line trips caused by wildfires, accounting for 4819% of the total line trips, especially the 220kV and above voltage level lines in Guizhou Power Grid on February 28, 2010, which caused 27 trips due to wildfires, accounting for the first. 2...

AI Technical Summary

Problems solved by technology

[0002] Since 2005, there have been 8 mountain fire failures in the transmission lines maintained by Hubei Power Transmission and Transformation Engineering Company. Mountain fires have caused line trips and brought serious threats to the safe and stable operation of the power grid.

However, video surveillance technology is used for image collection, analysis and early warning in fire-prone areas, but the problems of this technology are that the power consumption of the camera itself is large, and the amount of image data transmitted by the GPRS network is large. The data collected by the camera is closely related to the weather conditions. Under environmental and foggy weather conditions, the camera's ability to identify wildfires is greatly reduced

The current problems of infrared multi-spectral technology are: the infrared spectrum emitted by the flame in the case of wildfires is easily interfered by the infrared rays emitted by the heating wire and the infrared spectrum of solar radiation. The transmission line is in an environment where many combustibles are mixed in different proportions, so there are many interference factors for wildfire detection through infrared multi-spectral technology

The existing problems of laser radar technology for mountain fire detection are: the cost of laser radar is high, the total spanning distance of DC transmission lines is long, and the technology is deployed for mountain fire points, resulting in high overall costs. At the same time, the laser radar detection area is narrow and only Detecting a small area under the line corridor, LiDAR is easily affected by trees and vegetation below the line, resulting in a decrease in detection accuracy

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