Energy security is a widely discussed topic today. The threat of a blackout due to natural or other catastrophes is a high concern at utilities, as well as at industrial companies. The effects of a blackout can be tremendous. Transformer in Grids, power generation plants, and industrial companies are key elements for energy transmission. Forced transformer outages have immediate impact on availability of electricity. Thus, solutions for resilience of transformers as a key asset are in high demand.
A well-known US-based utility made the decision to invest in grid resilience and the reliability of their grid. They requested spare power transformers for emergency situations that can be transported and installed within 36 hours instead of the several months to ensure fast recovery and reduce outage costs. Siemens worked together with the customer to design a power transformer that could be compared to a multifunctional pocket knife: compact, lightweight, quick and easy to install, and versatile in voltage.
Instead of one heavy-weight three-phase unit, Siemens designed three lighter single-phase units with a compact design, making transportation straightforward. Installation is made easy with the use of plug-in bushings and connections. The units are also made versatile, covering different ratings to enable reconnection between the 335/136kV-system (300 MVA) and the 132/136kV-system (150 MVA) in less than two hours. Furthermore, ester insulation adds to the units’ fire safety and environmental friendliness.