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O&M of a 60 MW barge-mounted diesel power plant

  • o-m_case

The 60 MW diesel power plant is mounted on a barge moored in Colombo harbor, Sri Lanka.

Since 2000, the barge mounted power plant has been supplying base-load power to the Sri Lankan power grid.

BWSC Lanka (Pvt.) Ltd. is a subsidiary of BWSC in Denmark undertaking the operation and maintenance of the plant based on a 15-year O&M contract.

BWSC was responsible for engineering and installation of the electrical equipment and DCS system as well as test and commissioning of the barge.


Colombo Power (Pvt.) Ltd. (CPPL) is the owner of the Colombo Power Barge and developer of the Independent Power Producer (IPP) project.

The company is 50/50 owned by Kawasho Corporation and Mitsui Engineering & Shipbuilding Co. Ltd. (MES).

Transfer of know-how

Transfer of expertise and delegation of responsibility are essential elements in the BWSC business approach.

Hence, under the O&M contract, BWSC Lanka employed and trained a staff of approximately 50 Sri Lankan engineers and technicians. Most of these staff are still employed with BWSC Lanka or with other BWSC operations around the world.

Criterion for success

The major criterion for success of the O&M project is to produce power to meet the annual Minimum Guaranteed Energy Amount of 420 GWh as stipulated in the Power Purchase Agreement (PPA) with Ceylon Electricity Board. 

This performance criterion has been surpassed, as the actual average net production per year has been 494 GWh with an average plant load factor during operation of 99%.
The outstanding performance of the barge could not have been achieved without the well-proven reliable 2-stroke diesel technology and a well-trained and highly motivated O&M staff.

Technical details

Diesel engines: 
  • 4 x Mitsui MAN B&W 12K50MC-S two-stroke engines.

  • 4 x Maidensha 19.6 MVA, 11 KV/50Hz alternators.

Exhaust gas boilers:  
  • 2x Sasebo Heavy Industries Co. 1,600 Kg/h, 7 barG.

Step-up transformer:
  • 1 x ABB 80 MVA, 11/220 KV.

Barge construction:  
  • Sasebo Heavy Industries Co., Japan.

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