System and method for monitoring disconnection condition of transmission line
A technology for transmission lines and monitoring systems, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., and can solve the problems of inability to accurately monitor the disconnection of lines
Pending Publication Date: 2017-08-18
李淑静
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Problems solved by technology
[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a transmission line disconnection monitoring system and method, which solves the problem that the current transmission line monitoring device cannot accurately monitor the circuit disconnection situation, and further solves the monitoring problem of the transmission line when it is not transmitting power
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[0019] Such as figure 1 As shown, a transmission line disconnection monitoring system according to the present invention includes a transmission line, and also includes: a monitoring tail end, which is set at the end of the transmission line for generating even harmonics; a monitoring terminal, which is set at the front end of the transmission line for It is used to monitor the current situation on the transmission line and detect whether there are even harmonics. If no even harmonics are detected, a line disconnection signal is sent. Since the three-phase balanced system itself cannot generate even harmonics, the detected even harmonics must be applied by the monitoring end, so it can be judged that the transmission line is intact and not damaged; if no even harmonics are detected, It indicates that there is an open circuit in the transmission line and even harmonics are lost.
[0020] Such as figure 1 As shown, the monitoring end can be an even-order harmonic generation mo...
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The invention discloses a system for monitoring the disconnection condition of a transmission line. The system comprises a monitoring tail end arranged at the tail end of a transmission line and used for generating even-order harmonics; and a monitoring terminal arranged at the front end of the transmission line and used for monitoring the current condition of the transmission line and detecting the presence / absence of even-order harmonics. If no even-order harmonic is detected by the monitoring terminal, the monitoring terminal sends out a line disconnection signal. Due to the fact that a three-term balanced system itself is not likely to generate even-order harmonics, detected even-order harmonics must be applied by the monitoring tail end. Therefore, if no even-order harmonic is detected, even-order harmonics must be lost due to the disconnection condition of the transmission line. The disconnected transmission line is not likely to generate even-order harmonics, so that the influence of the interference current of the disconnected transmission line on the monitoring result is avoided. The disconnection condition of the transmission line can be monitored more accurately.
Description
technical field [0001] The invention relates to a line monitoring device and method, in particular to a transmission line disconnection monitoring system and method. Background technique [0002] As a kind of energy, electric energy plays a very important role. It is mainly transmitted to various power consumption areas through transmission lines. These transmission lines are criss-crossed and spread across every corner of the city and rural areas, delivering electric energy to every place where it is needed. These transmission lines are often damaged, such as: artificial cutting and construction damage. Damaged transmission lines cannot continue to supply power, which has a great impact on people's life and production, and causes huge economic losses. In order to solve this problem, monitoring and alarm devices are often used to monitor the transmission line at present. This monitoring is to confirm whether there is an open circuit by monitoring the current situation of th...
Claims
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Login to View More IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 廖志梅
Owner 李淑静