generators and switchgear
››› at low powers, and hence reduced efficiencies, as a result of low port power requirements. “We are providing energy-efficient solutions to a ferry line that connects key locations,” said Heikki Soljama, head of ABB’s marine and cranes business unit. ABB offers a range of transformers, switchgear and frequency converters for S2S power applications in addition to standard ship power generation and distribution system equipment. This includes UniGear ZS1 medium voltage switchgear which is a marine version of ABB’s air-insulated switchgear and installed in ships and other offshore facilities worldwide. The range is said to comply with the most rigorous international standards, including IEC 62271-200, and equipment is also certified by the major class societies. Ratings are
Aggreko gains RINA certification Aggreko is well established as a major supplier of temporary site power for land-based and industrial applications, ranging from grid support to emergency power. It has over 50 years’ experience in rental power and has been prominent in the development of temporary power solutions for shipyards and for sea going vessels. To support its marine market operations,
Aggreko has recently gained certification from RINA Services for the application of its generators for temporary marine use. This confirms that temporary installations from Aggreko will meet necessary Solas rules for onboard use and make it easier to demonstrate compliance with safety requirements. “The RINA approval certificate on an Aggreko generator ensures compliance with onboard safety requirements, said Pino Spadafora,
available up to 12kV and 4,000A. ABB’s range of dry type transformers is also available for shipboard applications at low and medium voltages. Suitable for S2S power, they are popular for use in propulsion systems. A recent example of this is an order taken in 2013 for 24 of these transformers for propulsion duty, rated at 2,300 kVA and 480V. These are to be installed in 12 diesel-electric powered offshore platform supply vessels being built by Fujian Mawei Shipbuilding in China.
Further products adding to the flexibility of ABB’s S2S system include the PCS100 static frequency converter range. These enable the connection of 60Hz equipment to a 50Hz power supply or vice versa. With voltages also converted to match load requirements, the S2S system therefore offers the flexibility of onshore
power supply connection to service ship loads in almost any global location with dockside power connection facilities. For more traditional ship power
requirements, the ABB portfolio also includes certified marine switchgear and a range of high voltage generators, these being custom designed as diesel generating sets or for operation as shaft power take-off generators. Power outputs are up to 50 MVA at either 50Hz or 60Hz frequencies and at voltages of up to 15kV. At present, over 1,700 ABB high voltage synchronous generators are operating on a wide range of vessel types. The generators use the ABB shunt boost excitation system, taking power from the line voltage through a transformer with a permanent magnet exciter to ensure secure voltage build up.
Aggreko has received certification for its generators to be used for temporary marine use
area manager for RINA Services. Speaking for Aggreko, Maarten Martens, its business development manager for continental Europe,
First marine contract for permanent magnet specialist Permanent magnet electrical generator technology is not a new concept but, in recent years, significant steps have been made in its development. Applications can be seen in a range of industries, including the expanding wind power sector.
In January 2014, however, The Switch,
based in Vantaa, Finland, signed a contract with WE Tech Solutions of Vaasa, to supply four direct-drive 1.5MW permanent magnet (PM) marine shaft generators, marking The Switch’s first move into the marine sector. The generators will be coupled with WE Tech Solutions’ WE Drive system which is based on variable speed drive technology, removing the constraint of constant shaft speeds required for conventional generator technology. The Switch already supplies a range of PM generators, motors and frequency management systems to industrial users and the technology is said to operate reliably in
64 I Marine Propulsion I April/May 2014
harsh environments. The machines have high power densities, which is attractive for shipboard applications where installation space is limited. Combined with the WE Drive system, this new technology is expected to provide increased flexibility for marine operators combined with lower operating costs for ship electrical networks. Deliveries of this latest order will commence towards the end of 2014 with WE Tech supplying the generators and drive systems to Tianjin Xingang Shipbuilding Heavy Industry Co in China. They will be installed in four post-Panamax car carriers ordered by Wallenius Lines, with deliveries scheduled for 2015 and 2016. “Over the past three decades, the shaft generator has been successfully employed on board ships worldwide. The main advantage is to allow main engines to use cheaper heavy fuel oil (HFO) for electrical power
said: “This process will ensure faster and simpler delivery of containerised diesel power generators for planned or emergency projects.”
production, thereby significantly reducing the running hours of auxiliary generators,” explained Mårten Storbacka, managing director of WE Tech Solutions. By combining the variable frequency WE Drive with the PM shaft generator, the ship’s electrical power is generated with the same high efficiency throughout the full speed range of the main engine, he said, which is especially important in electrical part loads. In addition, the WE Drive also provides 1MW of boost power directly to the propeller shaft to support the main engine when required, which he said enables a low-load optimised main engine. “These orders show the real need for new solutions to help seagoing vessels significantly lower the costs of operations, reduce maintenance needs and meet the increasingly stringent emission regulations,” said Mika Koli, business development manager at The Switch. MP
www.mpropulsion.com
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