Single-core high-voltage cable joint intelligent monitoring system and intelligent monitoring method

Abstract

The invention relates to an intelligent monitoring system and an intelligent monitoring method for a single-core high-voltage cable joint, wherein the intelligent monitoring system is composed of a central platform, a client terminal, and an intelligent terminal, and a temperature monitoring module, a current monitoring module, an anti-theft sensor, and a cable local discharge sensor. The invention collects cable temperature, ground wire current, cable partial discharge, and equipment anti-theft, compares them with relevant parameters set in the system, and regularly uploads the monitored parameters to the central platform. parameter interval. The present invention realizes all-round online real-time monitoring of important parameters of cable operating conditions, including cable temperature index, anti-theft monitoring, and current pulse information monitoring of cable shielding layer grounding wire, avoids the possibility of conventional false alarms, and saves mistaken repairs cost.

Description

technical field [0001] The invention relates to the field of power transmission cable security facilities, which are used for monitoring the safety of underground ground cable power transmission. Background technique [0002] At present, the development and construction of cities are inseparable from electricity, and in the construction of power facilities, the construction scale of underground power grids continues to expand. As the core carrier of power transmission, cables have been widely used in underground power grids. However, the corresponding safety issues of cables It is not difficult to find after research that more than 90% of the cable accidents occur in the cable joints, so all-round monitoring of the operation status of the cable joints is of great significance to the safe operation of the underground power grid. [0003] In recent years, there have been many accidents at home and abroad that caused the thermal collapse of the cable due to the load exceeding i...

AI Technical Summary

Problems solved by technology

[0008] 1. At present, most cable temperature monitoring equipment can monitor the surface temperature of the cable joint, but it is not accurate and timely enough to judge the working condition of the cable only by the surface temperature of the cable, and one party cannot accurately know the temperature of the cable core. The actual value, and the second is that it is impossible to know exactly the time label corresponding to the temperature value

[0009] 2. The cable will form a large circulating current in its shielding layer. In severe cases, it can reach 50% to 90% of the main current, that is, tens of amperes or even hundreds of amperes. The loss is very large, and the cable may even explode, affecting the power system. The safe operation of the cable head, and the current cable head detection device is relatively deficient in the technology of evaluating the cable shielding layer

[0010] 3. The value of the grounding cable and the grounding box is high, so it attracts some criminals to steal

[0011] Therefore, it is very important to ensure the safe operation of the power grid and improve the management efficiency of the power sector, but the existing cable monitoring technology is not mature enough, mainly reflected in: 1. The detection accuracy is not high, and it is impossible to reflect the cable at a certain time node in time. The most realistic temperature information of the core

2. The monitoring range is limited, and it is impossible to monitor many important data through one system, resulting in incomplete monitoring data, which cannot reflect the most realistic working conditions of the cable operation; 3. The parameter analysis method is incomplete, and also cannot reflect the most Real working conditions, and may generate false positives

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