THPC completes first round of upgrades at 500-MW Theun-Hinboun hydropower plant

The first half of a major overhaul to the 500-MW Theun-Hinboun hydroelectric plant in Laos is complete, owner Theun-Hinboun Power Co. Ltd. reported.

Efficiency tests show the initial phase of upgrades, which includes a replacement Francis turbine for Theun-Hinboun’s original No. 2 unit, increase the project’s output capacity by 10 MW at peak operation.

Norway’s Rainpower ASA will continue its role as contractor for Unit 1, which is to be replaced beginning in December. Work on the turbine will be completed by March of next year, with Units 1 and 2 both having rated capacities of 120 MW and best efficiency levels of 110 MW, giving Theun-Hinboun an increased total capcity of 520 MW.

The new turbines were manufactured by Rainpower at its factory in Hangzhou, China.

THPS has performed previous expansions of the plant, with Alstom providing a 220 MW unit and equipment for the 60-MW Nam Gnouang hydropower plant located upstream.

THPC said the overhaul was completed ahead of schedule and without incident.

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Michael Harris formerly was Editor for

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