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Alstom delivers world's first self-closing electronic ring gate system to Ahai hydro project in China

China-based Tianjin Alstom Hydro Co. Ltd. has delivered the world's first self-closing electronic ring gate control system to the Ahai hydropower station in China, Alstom reported.

The system supplied by Alstom boasts the world's first electronic ring gate control system with hydraulic synchronization – meaning that in an emergency, the system can close by itself, cutting the flow of water to stop the turbine, a press release states.

The Ahai dam and hydro project, owned by Yunnan Jinsha River Hydropower Co. Ltd, is currently under construction and comprises 5×400-MW Francis hydro turbine generator units, for which the five turbines are being supplied by Alstom. The first unit will be commissioned in spring 2012.

With a diameter of 10 meters, a height of 2.6 meters and weighing 110 tons, the Ahai ring gate is the biggest one in the world, Alstom said.

In other news, RusHydro and Alstom have signed a deal to build a 500 million euro (US$677 million) hydro turbine plant in the republic of Bashkortostan.

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