CEEG has completed the rollout of its SFFZ-140000/115kV oil-immersed power transformer, developed in-house for offshore floating power platforms operating in Arctic waters. The project marks a genuine step forward for the company in specialty transformer development — one that pushed the boundaries of what this class of equipment is typically asked to do.
No Existing Playbook to Follow. The SFFZ-140000/115kV uses a low-voltage dual-split on-load tap-changer configuration, tailored to the power supply architecture of offshore floating generation units. It sits inside the hull of an Arctic floating platform, where it has to keep running steadily under a combination of extreme cold, constant vessel movement, and mechanical stress — all at once, and for extended periods. No prior industry qualification framework existed for this combination of conditions, so CEEG had to define its own.
1. Cold Resistance and Moisture Protection — Addressing Insulation Challenges in Extreme Cold and High Humidity
Arctic operating conditions mean the transformer faces freeze-thaw cycles, condensation, and salt fog corrosion on a continuous basis — all of which gradually attack insulation and sealing systems if not properly accounted for in the design. Material selection and sealing arrangements were developed specifically for this environment rather than adapted from standard onshore practice.
2. Tilt Resistance and Stability — Reliable Operation at Significant Inclination Angles
A vessel underway or a floating platform at work is never perfectly level. The transformer's oil system, core-and-coil assembly, and internal connections all had to be designed to function reliably across the full range of tilt angles the platform might realistically experience — not just under ideal conditions.
3. Vibration and Shock Resistance — Withstanding Broadband Vibration and Wave Impact
The unit has been put through sinusoidal swept-frequency vibration testing and is designed to handle the repeated shock loads that come with wave action and platform movement. Dynamic simulation and structural reinforcement work was carried out to avoid resonance, and fatigue resistance and connection integrity were both verified against the required performance levels.
Certified by the Industry's Leading Classification Societies
CEEG's marine transformers can be supplied with certification from CCS, ABS, BV, LR, KR, NK, RINA, and other major classification societies. These certifications cover the full chain from design review and material checks through to manufacturing oversight and finished product testing.
