Ian Marchant, chief executive of SSE, said the scheme is giving hydro-electric power in Scotland "a new lease of life".
He added: "I've been very pleased to see for myself such good progress at Glendoe and to see this important stage in the commissioning of the scheme being reached."
British Eco-Energy recently said that wind turbines are one of the most cost-effective forms of renewable energy available in the UK.
The organisation added wind turbines fit well with the climate and geography of the UK.
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