Over-voltage monitoring system and monitoring method for transmission line
A technology for voltage monitoring and transmission lines, which is applied in the direction of measuring current/voltage, measuring devices, measuring electrical variables, etc., which can solve the problems of inaccurate monitoring results, high cost of capacitive voltage dividers, and increased operation and maintenance workload.
Inactive Publication Date: 2017-03-22
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology
[0004] However, for ultra-high voltage transmission lines and distribution network transmission lines, on the one hand, the installation of capacitive voltage dividers is costly and increases the workload of operation and maintenance; Operational risks, resulting in inaccurate monitoring results and other issues
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[0031] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. Rather, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.
[0032] The embodiment of the present invention provides a transmission line overvoltage monitoring system, see figure 1 with figure 2 , Including: over-voltage monitoring device 1, background data processing device 2, high-voltage arm capacitor C1 and low-voltage arm capacitor C2 connected in series.
[0033] One end of the high-voltage arm capacitor C1 is electrically connected to...
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The invention relates to an over-voltage monitoring system and monitoring method for a transmission line. The system comprises an over-voltage monitoring device, a background data processing device, a high voltage arm capacitor and a low voltage arm capacitor, wherein the high voltage arm capacitor and the low voltage arm capacitor are connected in series with each other. The high voltage arm capacitor comprises a number of ceramic capacitor insulators which are connected in series. One end of the high-voltage arm capacitor is electrically connected with the transmission line to be detected, and the other end is electrically connected with one end of the low voltage arm capacitor. The low voltage arm capacitor comprises a ceramic capacitor insulator. The other end of the low voltage arm capacitor is grounded through a tower. The over-voltage monitoring device is arranged on the tower. The input end of the over-voltage monitoring device is electrically connected with both ends of the low voltage arm capacitor. The over-voltage monitoring device is communicatively connected with the background data processing device. The advantages of high dielectric strength, good mechanical properties, cheap price and the like of the ceramic capacitor insulators are used. The insulators are no longer directly hung on the transmission line. The over-voltage of the transmission line to be detected is monitored in real time. Over-voltage data are completely and accurately recorded.
Description
Technical field [0001] The invention relates to the technical field of power system overvoltage monitoring, in particular to a transmission line overvoltage monitoring system and monitoring method. Background technique [0002] In the power system, monitoring the overvoltage condition of transmission lines is of great significance for obtaining real transmission line overvoltage data, analyzing overvoltage accidents, improving grid insulation coordination, improving lightning protection measures for overhead lines, and ensuring the safe operation of power systems. [0003] Overvoltage monitoring systems are generally divided into contact overvoltage monitoring systems and non-contact overvoltage monitoring systems. In the current power system, the commonly used overvoltage monitoring system is a contact overvoltage monitoring system. The contact-type overvoltage monitoring system is to install a capacitive voltage divider in the substation or transmission line, obtain the overvolt...
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Login to View More IPC IPC(8): G01R19/165
CPCG01R19/16576
Inventor 刘红文王科马仪
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST