Fault detection system and method for power transmission line

Abstract

The invention relates to a fault detection system and method for a power transmission line. The fault detection system comprises a main control circuit, a conductor vibration monitor, meteorological environment observation equipment, line monitoring equipment, a power failure detection module, a fault display module, a power supply module, a radio-frequency module, a fault detection module and a monitoring computer, wherein the fault detection module comprises a current sensor, a voltage sensor, an overcurrent protection module, an overvoltage protection module, a short-circuit fault judgment module and a grounding fault judgment module. In the fault detection device adopted by the invention, when a short-circuit fault occurs, an electronic switch can be automatically turned off within short time after being turned on; if the short-circuit fault is a transient fault, a current detection device detects no pulse current; if the fault is a permanent fault, the current detection device detects the pulse current, thereby whether the fault is the transient fault or the permanent fault can be judged, a reliable basis is provided for the subsequent fault handling and thus the inspection and maintenance speed of the line can be improved.

Description

technical field [0001] The invention relates to the field of fault detection of high-voltage transmission lines, in particular to a fault detection system and detection method for transmission lines. Background technique [0002] With the rapid development of the national economy, the demand for electricity in all walks of life is increasing, and the requirements for the quality (stability, uninterrupted and accompanying services) of power supply provided by the power supply department are also getting higher and higher. The safety of power grid operation away from high-voltage transmission lines is particularly important. [0003] At present, my country uses 10KV lines as the last step of high-voltage power transmission. This kind of reference is very common. 10KV lines are used as upper-level power transmission lines with civilian voltages of 220V and 380V. The line routing is relatively complicated, the geographical environment is relatively harsh, and there are line safe...

AI Technical Summary

Problems solved by technology

[0003] At present, my country uses 10KV lines as the last step of high-voltage power transmission. This kind of reference is very common. 10KV lines are used as upper-level power transmission lines with civilian voltages of 220V and 380V. The line routing is relatively complicated, the geographical environment is relatively harsh, and there are line safety At the same time, because the 10KV line is the end of the main high-voltage line, its erection method and working environment have caused the susceptibility of line faults; when the 10KV line fails, its downstream transformer will stop supplying power to users, and this fault will The power outage of the subordinate users in the corresponding transformer station area of ​​the assembly leads to the loss of industrial and agricultural production, which seriously affects the daily life of the masses

However, the currently used line fault detection device has the disadvantages of poor real-time performance, high false alarm rate, and failure to realize communication network integration.

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