In the Ruhr Tunnel, technical reliability is the only standard. Through proactive analysis and the implementation of active filters, we guarantee a stable electrical installation under all conditions.
The Roertunnel in the A73 is the longest land tunnel in the Netherlands, where the safety of thousands of road users depends on complex tunnel and traffic engineering installations. During the realisation phase, the need arose to preventively control invisible Power Quality problems, such as harmonic contamination and phase shift, to avoid failures and fire hazards.
Uncertainty about plant stability in the event of calamities posed a critical risk for plant operators. A lack of control over power quality can lead to additional wear and tear on sensitive electronics and unexpected failures, which in a tunnel environment directly jeopardises public safety.
Our engineers started with an in-depth diagnosis by taking measurements both at the Point of Transition (the source) and deeper into the complex tunnel installation. By analysing and interpreting this data, we accurately identified the impact of contaminated power on the electric motors and lighting systems.
The data collected offered evidence that a targeted approach to harmonic contamination and phase shift was crucial for continuity. Each technical finding from the analysis was translated into its direct impact on the installation, focusing on removing uncertainties and ensuring safety within the set standards. This methodology ensures that the final solution seamlessly addresses the specific needs of this vital infrastructure.
Based on the analyses, we implemented four active filters, strategically placed in each service building feeding the tunnel. This solution not only eliminates harmonic pollution, but also corrects the cos phi to a value of 0.86. This keeps us well within the specified standards and significantly increases the lifetime of the connected components.
To provide maximum security, the filters are dimensioned so that they are only 60% loaded in daily operation. This deliberate choice provides a reserve capacity of 40%, ensuring stable and safe operation even when additional emergency systems are called in during emergencies. The investment immediately translates into a payback period of around four years due to less energy loss and lower maintenance costs.
Our expertise in heavy infrastructure ensures that you can rely on your installation, even when every second counts. We take responsibility from initial diagnosis to final solution.
HyTEPS
Beemdstraat 3
5653 MA Eindhoven
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