How to solove the electrical corrosion problem of ADSS cables? Today, Let's talk about solving this problem today.
1. Reasonable selection of optical cables and hardware
Anti-tracking AT outer sheaths are widely used in practice and use non-polar polymer material base materials. The performance of anti-tracking PE outer sheath materials is also good and should be reasonably selected based on actual needs. This type of material uses inorganic fillers, which can effectively isolate carbon black particles and prevent large leakage current. The application of tracking-resistant PE outer sheath material also improves the heat resistance of the outer sheath and prevents damage caused by rising dry strip arcs. This type of material can improve the anti-tracking performance of ADSS cables while avoiding negative effects on other properties, so the actual application effect is better. If the content of inorganic compound materials is increased to about 50%, the tracking resistance can be further improved, but other properties will also be affected.
2. Optimize optical cable hanging points
Reasonable selection of optical cable hanging points can reduce the probability of electrical corrosion and enhance the operating quality of power communication networks. The lines should be scientifically planned, and information such as the distribution characteristics and intensity of the induced electric field should be comprehensively obtained and evaluated to ensure the scientificity and feasibility of the hanging point location and reduce the impact on the ADSS cable. Specifically, it is mainly based on calculating the induced electric field to select the hanging point position that can reduce the occurrence of electrical corrosion of optical cables. If discharge traces often appear at the ends of hardware, anti-vibration hammers can be used instead of anti-vibration whips to avoid anti-vibration whips. The end of the vibrating whip and the end of the twisted wire become discharge electrodes and cause corona, so make reasonable adjustments to the hanging points.
3. Protect the surface of optical cables
Strengthening the effective protection of ADSS cables to prevent serious wear and tear problems during construction can also play a good role in prevention and control. The appearance of the ADSS optical cable should be comprehensively inspected to prevent it from being affected by contamination and causing electrical corrosion during operation. Especially when cracks and severe wear occur, water and dirt will accumulate under the influence of external weather. The resistance value will decrease, causing the induced current to increase, shortening the service life of the ADSS optical cable. It is necessary to conduct a comprehensive survey of the construction environment, clarify the distribution characteristics of surrounding towers, branches, buildings, spans and other objects, and make reasonable specifications for the layout of ADSS optical cables to prevent serious damage. Check the quality of the protective sleeve to strengthen the protection of the optical cable and enhance its anti-tracking performance.
4. Control the distance between pre-twisted wire and anti-shock whip
When installing ADSS cables in lines, the distance between pre-twisted wires and anti-shock whips should also be reasonably controlled. This is also the main measure to prevent electrical corrosion problems. Especially in order to meet the needs of electric power work, the gear distance will exceed the standard value, and at the same time, the optical cable will vibrate under the influence of external windy weather. Different numbers of anti-shock whips should be used according to different span values. When the spans are 250-500m and 100-250m respectively, applying 2 pairs of anti-shock whips and 1 pair of anti-shock whips can achieve a good anti-shock effect. If the span is If the distance exceeds 500m, you can add another pair of anti-shock whips. Under the traditional design system, the distance between the anti-shock whip and the pre-twisted wire cannot be controlled, resulting in the distance being too close and causing discharge. Therefore, the distance between the two should be controlled to about 1m to reduce or eliminate the problem of corona discharge. During construction, special tools should be used to handle the anti-shock whip to prevent improper handling from causing the anti-shock whip to gradually approach the pre-twisted wire. In addition, the application of insulation methods can also improve such problems. In practice, silicone insulating paint is often used to enhance the insulation performance of optical cables, so that pollution flashover and corona problems can be controlled.
5. Set up discharge halo ring
The anti-shock whip and the end of the pre-twisted wire have a certain roughness, which is a key factor in causing corona discharge. It is difficult to ensure good uniformity of the electric field and accelerates the electrical corrosion of ADSS optical cables. Therefore, it can be processed with the help of discharge halo, so that the tip discharge phenomenon can be effectively controlled. The corona initiation voltage value is significantly improved, so the occurrence of corona discharge can be controlled. When installing anti-shock whips and pre-twisted wires in ADSS cables, relevant operating standards and specifications should be strictly followed, and a discharge halo should be reasonably installed at the end of the pre-twisted wires to prevent touching the optical cable and affecting its performance.
The existence of electrical corrosion problems in ADSS cables will affect the quality and operating performance of the optical cables, and is not conducive to improving the security and stability of power communication networks. Due to long-term effects of electric fields, dry-band arcs, and corona discharges, the probability of electrical corrosion will increase. To this end, in practice, we should gradually improve the prevention and treatment effect of electrical corrosion problems by rationally selecting optical cables and hardware, optimizing optical cable hanging points, protecting the surface of optical cables, controlling the distance between pre-twisted wires and anti-shock whips, and setting up discharge halo rings to prevent Cause major power failure.