Power supply line disconnection monitoring system and method
A technology for power supply lines and monitoring systems, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., and can solve problems such as inability to accurately monitor the disconnection of lines
Pending Publication Date: 2017-08-04
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 power supply line disconnection monitoring system and method, which solves the problem that the current power supply line monitoring device cannot accurately monitor the circuit disconnection situation, and further solves the monitoring problem of the power supply line when it is not transmitting power
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[0019] Such as figure 1 As shown, a power supply line disconnection monitoring system according to the present invention includes a power supply line, and also includes: a monitoring tail end, which is set at the end of the power supply line for generating harmonics; a monitoring terminal, which is set at the front end of the power supply line for monitoring The current condition on the power supply line detects whether there is an even harmonic, and if the even harmonic is not detected, a circuit break signal is sent. Since the three-phase balanced system itself cannot generate even harmonics, the detected even harmonics must come from the even harmonics contained in the harmonics applied at the monitoring end, so it can be judged that the power supply line is intact and there is no damage ; If no even harmonics are detected, it indicates that the power supply line is broken and the even harmonics are lost.
[0020] Such as figure 1 As shown, the monitoring end includes a h...
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The invention discloses a power supply line disconnection monitoring system. The system includes a power supply line, and also includes a monitoring tail end arranged at the tail end of the power supply line and used for generating even harmonics, and a monitoring terminal arranged at the front end of the power supply line and used for monitoring the current condition on the power supply line, detecting whether even harmonics exist and sending out a line disconnection signal when even harmonics are not detected. Since a three-phase balanced system itself cannot generate even harmonics, the detected even harmonics are certainly applied by the monitoring tail end, thus if the even harmonics are not detected, it indicates that a disconnection of the power supply line occurs, and the even harmonics are lost. The broken power supply line cannot spontaneously generate even harmonics, influence of interference current of the broken line on a monitoring result is avoided, and thus the disconnection condition of the power supply line can be monitored accurately.
Description
technical field [0001] The invention relates to a line monitoring device and method, in particular to a power supply 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 power supply lines. These power supply 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 power supply lines are often damaged, such as artificial shearing and construction damage. The damaged power supply line 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 power supply line at present. This monitoring is to confirm whether there is an open circuit in the line by applying a bias current...
Claims
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Login to View More IPC IPC(8): G01R31/08G01R31/02G01R23/16
CPCG01R23/16G01R31/085G01R31/50
Inventor 廖志梅
Owner 李淑静