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BHEL s scope of work in the project includes supply, erection and commissioning of 6 numbers Francis turbines operating at a head of 119 meters with matching synchronous generators of 200 rpm, static excitation system, main inlet valves, penstock valves, digital governors, state-of-the-art control & monitoring system (SCADA), associated turbine, generator and station auxiliaries, Gas Insulated Switchgear (GIS) and electrical & mechanical Balance of Plant (BoP).
Under the terms and conditions of this contract, Alstom will design and supply three new generating units, including propeller turbines, vertical generators, static excitation systems, speed governor systems, and protection and control systems.
A rather slow high-frequency AC machine excitation system (P-system) produced in Russia in the middle of the 70s is in use, and a fast static excitation system (PD-system) UNITROL5000 produced by ABB was installed in 2005.
The latest contract, for the supply of static excitation systems to the Liyujiang Power Station, Hunan Province, brings the total of state-of-the-art excitation equipment sold to 18 power stations in China to 32 sets over the past five years.