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Web Exclusive | September 2017

Siemens to upgrade NTPC Dadri steam power plant

Siemens Limited has commissioned India’s first condensate throttling-based Primary Frequency Control Solution at National Capital Power Station (NCPS), NTPC Dadri (Stage 2, Unit 6). Prashant Jain, Head, Power Generation Services, Siemens Limited said, “Flexible operation of the coal-fired power plants is critical for renewable energy integration into the grid. Condensate throttling is one of the most advanced and efficient methods which can be used to rapidly activate stored energy enough for unit load support for a few minutes.”

The principle of condensate throttling is that the turbine control system opens the governor valves to utilize the reserve steam storage capacity of the boiler. When additional power is needed, the condensate flow is reduced, usually by throttling of the condensate control valve. In the current regime of renewable energy integration into the power grid, this technology provides flexibility to the thermal power plant unit.
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