Drill ship power challenge: hybrid solution solves distribution issues

Rittal

Drill ship power challenge: hybrid solution solves distribution issues
Rittal Rittal
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OVERVIEW

Aspin Kemp & Associates (AKA), a manufacturer of electrical power and control systems headquartered in Montague, PEI, encountered one with its hybrid power initiative, the first hybrid drill floor destined for installation on ultra-deepwater drill ships operated by Transocean, Swiss offshore drilling contractors. Since on-site modification was impossible and scrap recycling of any modifications was unacceptable, the enclosures had to arrive ready-to-install.

Aspin Kemp & Associates (AKA) is a systems integrator delivering innovative products, technically advanced services, documentation and world-class training primarily to the marine and offshore industry.

AKA’s solution – to couple dieselenerators with ultracapacitors to resolve the problems in the power distribution network – called for dozens of industrial enclosures. The intermediate power storage system absorbs and delivers energy at a rate faster than the process can use or return it. The hazards of the E-stop are controlled by allowing operation without the main generator connection. The diesel operates continuously at high output without compromising performance or requiring a “spinning reserve” of power.

To meet project requirements, Rittal supplied a total of 114 TS 8 enclosures, including standard, modified and electromagnetically compatible models.
OPERATIONAL IMPACT
The desired enclosure system would improve reliability, save energy, reduce emissions, lower maintenance costs, enhance safety and support maritime regulations.
There was also a safety benefit. With fewer diesels in operation, there was a significant reduction in injuries and spills associated with fuel and other fluid handling, while smoother transitions in E-stops protected the workers from sudden engine stops.
A common bus that allows some generators to remain in standby condition rather than in constant operation reduced hours of machine wear and fouling on each generator.

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