Online monitoring device for low-voltage distribution network

Abstract

The invention discloses an online monitoring device for a low-voltage distribution network, and belongs to the field of online monitoring of the current of the low-voltage distribution network. The device is characterized by comprising a shell and a control circuit fixed in the shell, wherein the control circuit comprises an analog-digital conversion module, a central processing module and a communication module; the output end of the analog-digital conversion module is connected to the input end of the central processing module; an input and output port of the central processing module is connected to the communication module in a bidirectional manner; the communication module is simultaneously connected to a monitoring master station in a bidirectional manner; wireless communication is arranged between the communication module and the monitoring master station; a current acquisition module is further arranged; the current acquisition module comprises a Rogowski coil and an integral circuit; and the Rogowski coil is arranged on a bus of the distribution network, and the output end of the Rogowski coil is connected to the input end of the analog-digital conversion module through the integral circuit. According to the online monitoring device for the low-voltage distribution network, the wireless communication is realized with the monitoring master station, and the remote transmission of data of the bus of the low-voltage distribution network is facilitated.

Description

technical field [0001] An on-line monitoring device for a low-voltage power distribution network belongs to the field of on-line current monitoring of a low-voltage power distribution network. Background technique [0002] The distribution network is composed of overhead lines, cables, towers, distribution transformers, isolating switches, reactive power compensators and some auxiliary facilities, etc., and plays an important role in distributing electric energy in the power network. In this field, the low-voltage distribution network generally refers to the distribution network below 1KV. In the existing technology, the low-voltage distribution network generally adopts a closed-loop design and an open-loop operation method. Its grid structure is radial. The existing low-voltage distribution network The monitoring system of the power grid generally adopts the wired detection method, that is, the current signal in the distribution network is collected through the transformer,...

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Problems solved by technology

In this field, the low-voltage distribution network generally refers to the distribution network below 1KV. In the existing technology, the low-voltage distribution network generally adopts a closed-loop design and an open-loop operation method. Its grid structure is radial. The existing low-voltage distribution network The monitoring system of the power grid generally adopts the wired detection method, that is, the current signal in the distribution network is collected through the transformer, and the collected current signal is transmitted through the wire. The method is extremely inconvenient, so reliable monitoring cannot be carried out in many remote places, resulting in hidden dangers of power grid failure

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