Electric leakage warning device for step voltage of power distribution network and electric leakage monitoring system of power distribution network in power supply region

Abstract

The invention provides an electric leakage warning device for a step voltage of a power distribution network and an electric leakage monitoring system of the power distribution network in a power supply region. The electric leakage warning device for the step voltage of the power distribution network comprises a pair of earth poles, an electric leakage detection module and a wireless communication module, wherein the pair of earth poles are used for detecting the step voltage of a ground surface around special equipment which is used in the power distribution network, the special equipment used in the power distribution network is a transformer or an iron tower or a pull wire, the step voltage is sent to the electric leakage detection module, the wireless communication module is a mobile phone communication module, when that the step voltage of the ground surface around the special equipment used in the power distribution network reaches a certain set value is found out by the electric leakage detection module, an electric leakage condition is considered to exist, and warning information is sent out by the mobile phone communication module and a mobile communication network. The electric leakage warning device is low in cost, small in volume and high in integration and is practical and convenient to install.

Description

technical field [0001] The invention relates to a step voltage leakage alarm device for a distribution network and a leakage monitoring system for a distribution network in a power supply jurisdiction. Background technique [0002] At present, the low-voltage outlet switches of distribution network transformers are mostly air switches, which do not have the function of leakage inspection. The advantage of the air switch is that it has high stability, is not affected by the leakage of some lines, and avoids unnecessary tripping actions. However, when the leakage exists for a long time, the air switch will not trip and warn, which will bring safety hazards to the operation and maintenance of the power grid. If it is serious, personal electric shock casualties will occur (see "Death of a 12-year-old girl due to electric shock in Jieshi, Lufeng, Shanwei"). [0003] The applicant has also done research in the form of zero-sequence current transformer + leakage detection + wirele...

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Problems solved by technology

[0003] The applicant has also done research in the form of zero-sequence current transformer + leakage detection + wireless communication. The zero-sequence current transformer is used to detect the wires on the outlet side of the air switch, but it is found that the above-mentioned leakage detection wireless alarm scheme still has the following deficiencies: 1) It is necessary to cut off the power of the conductive wire during installation, which will affect the power consumption; 2) It is large in size and occupies a certain space, and it is not easy to integrate into modules; 3) The cost of the product is high

[0004] In addition, in addition to the leakage risk of transformers in the power distribution network in the power supply area, high and low voltage iron towers and pull wires (used to fix utility poles) and other equipment also have the risk of leakage. The leakage monitoring system needs to be improved. The original idea only needs to alarm. Perfect, due to the different distribution positions of transformers, iron towers and cables, not every maintenance personnel can find them in time and quickly. Objectively, it is necessary to locate and navigate the positions of transformers, high and low voltage iron towers and cables

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