1. Electric Corrosion
For communication users and cable manufacturers, the problem of electrical corrosion of cables has always been a major problem. In the face of this problem, cable manufacturers are not clear about the principle of electrical corrosion of cables, nor have they clearly proposed quantitative parameters. The lack of a real simulation environment in the laboratory has made the problem of electrical corrosion unable to be effectively solved. As far as the current ADSS cable application is concerned, the prevention of electric corrosion phenomenon requires the optimization of the design of the line hanging point. However, there are too many design factors, and it is necessary to use the analog charge method for three-dimensional calculation. However, my country's three-dimensional calculation technology is not perfect. The calculation of the tower and cable arc is lacking, which makes the solution of the electric corrosion problem not smooth. In this regard, my country must strengthen the research and application of three-dimensional calculation methods
2. Mechanical Properties
The mechanical performance of the cable involves the influence of the cable on the tower and its own safety and stress issues. The mechanical mechanics of the cable is studied based on static mechanics, and the force data of the cable must be accurately calculated. Current calculations for cables are generally to set them as flexible cables, show the cable erection conditions through catenary lines, and then calculate data such as sag and stretch. At the same time, calculations and judgments are made through established data and calculation software. However, the cable will be affected by various external conditions during its application. Therefore, the calculation of its mechanical performance must consider dynamic factors. Under this condition, the cable is affected by the internal and external environment, and the calculation is more complicated, and various performances need to be considered comprehensively. Experiments are then carried out to ensure the mechanical properties of the cable.
3. Dynamic Changes
cables are affected by dynamic changes such as electrical conditions and environmental factors, and the environment in which they are located is also very complex. However, the current calculation method is mainly based on static changes and cannot play a role in the practical application of cables under dynamic conditions. The use of empirical formulas to calculate the construction data of cables cannot guarantee the authenticity. For example, when calculating electric corrosion, electrical The quasi-static processing and mechanical processing static, natural temperature and wind force make the calculation of the cable need to consider more conditions, and the change of the electromagnetic state makes the calculation of the cable need to consider not only the distance but also the hanging point. Therefore, due to the many dynamic change factors of the cable, the calculation and processing of its various parts are also more complicated.
4. Environmental Factors
Environmental factors have also had a great impact on the application of cables. In terms of temperature, the cable will appear in different states due to the change of the external temperature. The specific influence can be determined by simulation experiment calculation. The influence of different temperatures on different cables is also different. In the wind load, the state and balance of the cable swinging with the wind need to be calculated by mechanical principles, and wind speed and wind will have an impact on the construction and application of the cable. In terms of climate, snow and ice coverage in winter will increase the load of cables, which will have a huge impact on the application of cables. On the phase conductor, it uses the high-voltage environment to affect the electrical of the cable, and the safety impact on the cable in a dynamic state will cause the cable to exceed the safe distance range. In the installation of accessories, the installation of cable accessories should consider its electrical corrosion. Affected by the external environment, moisture or dirt will appear on the surface of the cable and its anti-vibration whip, which will lead to leakage of the cable. Measures must be taken to prevent this. Phenomenon.
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