110KV substation cable trench online monitoring system

I. Overview

Significance: The cable trench in the substation is an important part of the substation system, and there are a large number of various types of power cables distributed in the cable trench, which are responsible for the transmission of power in the substation. As one of the key equipment in the power system, power cables have an important impact on the safety and reliability of power system operation. Understanding the causes of power cable faults is conducive to the adoption of reasonable and effective monitoring means and preventive measures to ensure the safety of power cable operation.

Hazards: cable trench in the variety of pipelines, cross-over complex, more fire hazard points, power cable operation will generate greater heat (especially the joint location), the cable once the failure will cause greater losses.

In minor cases, it may cause equipment failure;

Heavy will start a fire, endangering the safety of normal power transmission;

Phenomenon: The cable in the cable trench before the fault is accompanied by an increase in temperature, so according to the temperature of the cable surface is an effective means of judgment, when the temperature reaches a certain temperature value, you can determine the cable abnormalities, the need to take appropriate measures to eliminate safety hazards.

On-line monitoring system

1.The substation cable trench is an integral part of the power system, and the substation cable trench is generally small, so the traditional manual inspection method has a limited detection range.

1）Existence of interval cycles

2）Detection of discontinuities

3）Easy to miss problem points

4）Sowing safety hazards

2.Through the implementation of this project, a thermal imaging single-light gun is installed in the cable trench to display the image information and temperature information of the cable in the cable trench on the thermal imaging temperature measurement monitoring platform and alarm linkage.

1）Allows users to keep track of the temperature change of the main transformer in real time

2）Timely detection of temperature abnormalities

3）Ensure normal and safe operation of cables in cable trenches

II. System Architecture

III. System functions

1.Continuous real-time online monitoring of cable temperature in cable trench

Real-time online monitoring for power cables in the cable trench, real-time monitoring of temperature changes on the surface of the cable, can be positioned regionally to hit the temperature measurement, by clicking on the location of any point to be measured can display the temperature of the point.

2.Temperature overrun warning for major cable joints in cable trench

Thermal imaging single-light gun machine supports the setting of multiple different analysis objects, each analysis object can be used to configure temperature measurement, in order to measure the temperature of each location, and at the same time can achieve any point temperature overrun warning.

3.Temperature ledger management and status monitoring

The equipment temperature is pushed to the platform through the thermal imaging single-light gun machine, and the platform records the temperature information to form the equipment temperature ledger, which is presented in the form of temperature curves, forming the temperature curves of the main transformer in different states, and analyzing the operation status of the cables in the cable trench according to the historical records.

4.Electronic map alarm function

When there is a cable with abnormal temperature, the corresponding detected thermal imaging single light gun machine through the electronic map function for real-time location warning.
IV. Project landing effect

V. Project Value

1.Cost reduction and efficiency

Relying on thermal imaging single light gun machine auxiliary cable trench cable operation safety monitoring, to make up for the manual inspection of non-real-time and easy to miss safety hazards, improve the inspection efficiency of maintenance personnel, real-time visualization of the cable trench cable operation status, reduce the enterprise manual inspection of labor cost investment.

2.Smart Alert

Thermal imaging single-light gun can quickly locate hot spots and hidden areas. 24-hour online monitoring helps users to detect, prevent and deal with abnormal conditions in advance.