Cable lines are a key part of the power infrastructure, and an effective exploitation strategy is necessary to maintain their reliability. In the article, we will discuss important aspects of cable lines operating strategy, paying special attention to the damage rate.
Damage factor
In the process of assessing the quality of cable lines, an important measure is the damage factor, which precisely determines the number of damage per 100 km of cable line per year. Although in Europe a low level of this factor is commonly persisted, the situation in Poland looks different, especially in the areas of the activity of selected distribution companies from the energy industry. This phenomenon suggests the need for concentrated actions aimed at reducing the number of damage and increasing the overall reliability of power infrastructure. The values of this parameter are crucial for effective monitoring of the technical condition of the cable network, and their analysis allows you to identify areas requiring special attention and investment to improve the stability of the power system.
Challenges related to first generation cables
Medium voltage cable lines, especially those with polyethylene insulation, must be specially protected so that there is no failure. It is necessary here not only to use professional equipment, such as wire shears, but also further maintenance. The key problem is the occurrence of water tree, which is the process of the formation of destructive tubules in the insulation structure under the influence of moisture. First generation cables, installed mainly in the seventies and the early eighties, are particularly vulnerable to this phenomenon, which results in a decrease in their reliability and durability.
In response to this challenge, various techniques were introduced, one of which is the most effective saturation of the insulation with liquids based on silicone oil. This method aims to improve the quality of insulation and significantly extend the life of the cable. The saturation process consists in filling the conductive channels, resulting from water tree and all other free spaces in silicone liquid insulation. This intervention not only neutralizes the destructive effect of moisture, but also slows down the development of existing water trees, contributing to the protection of the cable structure from further deterioration. Not only the equipment for laying a cable line is needed, such ashydraulic winch, but also further maintenance methods.
How to preserve XLPE cables?
Second generation cables, equipped with insulation from cross -country polyethylene (XLPE), represent modern quality and performance standards in the field of cable lines. Compared to older generation solutions, they give a lot of benefits. First of all, they have much better operational efficiency compared to cables with thermoplastic polyethylene insulation and impregnated paper insulation. Global trends in the field of power infrastructure indicate a clear departure from older technologies in favor of XLPE, which is visible in the growing popularity of these cables on world markets.
XLPE cables offer increased durability and resistance to external factors, which translates into extending the exploitation period. Their structure based on cross -linked polyethyleis makes them more resistant to weather conditions, UV radiation and chemical factors, which is crucial for cable lines exposed to various external conditions.
In addition, XLPE cabins are characterized by lower failure rates and better insulation parameters, which reduces the risk of interference in the operation of the power network. The use of modern insulation materials means that second generation cables are more energy -effective, which is important for maintaining the stability and efficiency of the entire power system.
What diagnostic methods are used for cable lines?
To effectively manage the strategy of cable lines, it is necessary to use various and precise diagnostic methods. The key element is to conduct failure statistics, which is the basis for assessing the general condition of cable networks. These methods include not only the analysis of the overall condition of cable insulation, but also the precise location of specific defects, especially those that can potentially threaten the stability and reliability of the power system.
Decisions regarding the operation of cable lines should be based on a solid analysis, combining work history, environmental conditions and the characteristics of the entire network. Despite the valuables of some diagnostic tests, their conduct is necessary to effectively maintain reliability, safety and efficiency of cable lines. The analysis of statistical data and diagnostic test results allows you to make precise decisions, adapting the operating strategy to the actual conditions and needs of the power system.
The introduction of modern diagnostic technologies and effective regenerative strategies, such as saturation with silicone liquids, becomes a key element of effective cable lines management. Thanks to these innovative solutions, it is possible to improve the quality of the line without the need for them to replace them. A conscious approach to diagnostics, planning and the use of modern technologies become inseparable elements of operational strategies, contributing to the optimization of the functioning of the power system.
Diagnosis and maintenance are necessary, as is the chain winch in the construction of overhead lines. When complying with safe operation, cable lines work efficiently for many years.
