From the point of view of the operation of the transmission line, the necessity of spiral vibration damper is reflected in the precise suppression of breeze vibration. When the wind speed is in the breeze range of 0.5-8m/s, the air flow will form a periodic vortex on the leeward side of the wire, causing high-frequency and small-amplitude vibration of the wire along the axial direction. This kind of vibration may seem weak, but it will produce repeated bending stress at the suspension point of the wire, the connecting fittings and other parts. According to the statistics of the International Large Power Grid Commission, long-term wind vibration can cause wire fatigue and broken strands, shorten the service life of the line by 30% to 50%, and even cause major accidents such as wire breakage and tower collapse in severe cases. Through a special structural design, spiral vibration damper can form a mismatch between its own natural frequency and the vibration frequency of the wire, and use the damping force generated by the deformation of the material to consume vibration energy, reducing the vibration amplitude of the wire by more than 70%. In transmission projects in windy regions such as Northern Europe and North America, compared with lines with spiral vibration damper installed and lines without installation, the damage rate of metal fittings decreased by 62%, and the number of on-site emergency repairs by operation and maintenance personnel decreased by 45%. The guarantee effect of spiral vibration damper on line safety has been verified by decades of engineering practice.
From the perspective of the whole life cycle cost that buyers are most concerned about, the investment of spiral vibration damper is an important part of achieving long-term cost optimization. Some buyers may think that omitting spiral vibration damper can reduce the initial procurement cost, but in fact, the hidden cost of line operation and maintenance is often much higher than this part of the investment. Taking an African multinational transmission project as an example, spiral vibration damper was not installed in the initial stage of the project. After three years of operation, a large area of wire was broken. The direct cost of replacing wires and fittings alone reached US22.3 million. In addition, the loss of industrial production caused by power outages, the total economic loss exceeded US88 million. During the same period, the adjacent standard section of spiral vibration damper was installed, and no failures caused by vibration occurred within 5 years, and the operation and maintenance cost was only one-fifth of the former. In addition, the high-quality spiral vibration damper uses materials with strong weather resistance, which can still maintain stable performance in extreme temperature environments, have a long service life, and do not need to be replaced frequently, further reducing the labor and material costs of long-term operation and maintenance. For B-side buyers who pursue the return on investment of the project, spiral vibration damper is not an additional expenditure, but a strategic investment to reduce risks and control costs.
In the context of increasingly stringent global energy security compliance standards, the installation of spiral vibration damper has become a mandatory requirement for many national grid projects, and the necessity of spiral vibration damper is more reflected in the hard threshold of compliance and project acceptance. The EU "Power Transmission System Safety Standard" clearly stipulates that transmission lines with voltage levels of 110kV and above must be equipped with protective devices that meet the requirements of vibration control. The U.S. Federal Energy Regulatory Commission has also incorporated anti-vibration measures into the core indicators of the safety assessment of power grid projects. Projects that do not meet the standards will not pass the acceptance. For engineering companies or equipment buyers who need to participate in international bidding, choosing a spiral vibration damper that meets these standards is a prerequisite for the project to land smoothly and avoid compliance risks.