On-line monitoring system for high voltage cable

Abstract

The invention relates to an online monitoring system for high-voltage cables, which comprises a sensor, a data collection unit, a power supply device, and a network server. The sensor is arranged at the joint of a high-voltage cable and is used for collecting data such as the shield circulating current of the high-voltage cable joint, the core current, the surface temperature of the cable, and the ambient humidity and temperature and transmitting the data to the data collection unit. The data collection unit is arranged nearby the high-voltage cable joint and is used for collecting the data transmitted from the sensor and transmitting the date to the network server via a wireless network. The power supply device acquires power from the high-voltage cable and provides power to the data collection unit. The network server is installed in a control room and is used for receiving the data transmitted from the data collection unit in order to determine whether the power cable is in safe operation condition via special data analysis, thereby serving the purpose of helping maintenance personnel monitor the operation condition of the power cable at any time, and preventing the electrical faults from happening. In case that faults occur with the cable, the online monitoring system can send alarms promptly and locate fault points, thereby providing assistance for cable repair.

Description

【Technical field】 [0001] The invention relates to a monitoring system, in particular to a system for on-line monitoring of high-voltage cables. 【Background technique】 [0002] Modern urban construction puts forward higher requirements for power transmission. With the continuous development of electric power industry, the power transmission of urban overhead lines is being replaced by underground high-voltage cables, so the number of high-voltage cables is rising sharply. As a part of the transmission network, these cable lines are very important, and it is extremely important to ensure the safe operation of the cable lines. [0003] Unlike overhead lines, the complex environment of underground cables brings difficulties to operation and maintenance. Because there are defects and hidden dangers in the cable, and it takes a lot of manpower and material resources to maintain the cable. For high-voltage cable lines, the following operation, maintenance and overhaul tests are r...

AI Technical Summary

Problems solved by technology

As an important indicator of cable safety operation, the cable operation and maintenance department needs to regularly measure the sheath circulating current and insulation resistance to ensure the safe operation of the cable, but the traditional measurement methods of these two indicators have certain deficiencies

[0010] At present, the circulating current and insulation resistance of the cable sheath are mainly measured manually, which requires operation and maintenance personnel to regularly go to the site to measure and record, and then manually analyze the data. When measuring the insulation resistance, the cable must be stopped, so these two methods are not only time-consuming, It is laborious, and it is impossible to find the insulation defects of the cable sheath in time

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