A kind of electric noise suppression device and submarine cable power supply system

Abstract

The embodiment of the present application provides a power noise suppression device and a submarine cable power supply system, the device includes a cabinet and an electrical device assembly arranged in the cabinet; the electrical device assembly includes a common-mode inductor, a plurality of capacitive devices and a plurality of resistive devices ; The common mode inductor is set on the high voltage path of the power supply equipment and the ocean ground path to filter out common mode noise; there is a return path between the ocean ground path and the site ground, and multiple capacitive devices and multiple resistive devices are arranged on the return current path On the path, multiple capacitive devices are used to make the noise on the ocean-ground path and the noise on the high voltage path form a common mode, and multiple resistive devices are used to limit the current in the return path. The power noise suppression device provided by the embodiment of the present application can effectively suppress the power noise introduced by the surrounding environment of the terrestrial cable line in the submarine cable power supply system, and reduce the power noise to below the acceptable range of PFE, thereby effectively improving the entire submarine cable power supply. The stability of the system and the service life of the PFE of the power supply equipment.

Description

technical field [0001] The present application relates to the field of power system noise control, in particular to a power noise suppression device and a submarine cable power supply system. Background technique [0002] With the development of society, the construction of power system is increasing day by day, and the commercial and industrial power cables in the city are densely intertwined. These interlaced power cables will form complex electromagnetic fields around them due to electromagnetic induction, forming noise voltages on cables or power equipment in the field, and these noise voltages will be introduced into cables and power equipment to form electrical noise interference, which will affect the power supply system and power supply equipment. The construction of submarine optical cable will have a long section of land cable from the seabed, beach man well, submarine cable landing station to the remote land cable of the site, which will pass through these densel...

AI Technical Summary

Problems solved by technology

The electromagnetic fields formed by these commercial and industrial power cables generate noise voltages to the cables passing through them, and these noise voltages will be fed back to the power supply equipment PFE and the power supply system through the line, causing electrical noise interference to the power supply equipment PFE and the power supply system, and then causing PFE Changes in output voltage and PFE voltage will lead to degradation of system transmission performance, and even exceed the carrying capacity of PFE, thereby reducing the stability of the entire power supply system and reducing the service life of PFE

[0003] The current schemes for reducing noise interference of electrical equipment and power supply system can only suppress the electromagnetic noise generated in the electrical equipment, but cannot suppress the electromagnetic noise introduced by the surrounding environment of the electrical equipment and the power supply system. Therefore, when using When there are other environmental electromagnetic noises formed by commercial and industrial power cables around the electrical equipment and power supply system, the current scheme is difficult to achieve a good noise suppression effect and cannot be applied to the submarine cable power supply system

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