HITACHI : Completion of a 1,120-MVA Turbine Generator for Huadian International Zouxian Power Plant in China

Volume 56 Number 4 November 2007

AUTHORS

Seijiro Muramatsu	Power Electric Machine Design Dept., Hitachi Works, Power Systems, Hitachi, Ltd.
Kado Miyakawa	Power Electric Machine Design Dept., Hitachi Works, Power Systems, Hitachi, Ltd.
Mitsuru Onoda	Power Electric Machine Design Dept., Hitachi Works, Power Systems, Hitachi, Ltd.
Kazuhiko Takahashi	Power Electric Machine Design Dept., Hitachi Works, Power Systems, Hitachi, Ltd.
Kengo Iwashige, Dr. Eng.	Power & Industrial Systems R&D Lab., Power Systems, Hitachi, Ltd.

OVERVIEW

Hitachi, Ltd. has completed construction of a 1,120-MVA turbine generator (2 poles, 50 Hz) for the Huadian International Zouxian Power Plant of China Huadian Corporation in China, and its performance has been fully verified through factory testing. With a maximum output of 1,230 MVA—some 1.6 times greater capacity than the 778-MVA output of Hitachi' s next larger similar generator—the generator is one of the world' s largest-class single unit turbine generators ever developed for a thermal power plant. This substantial increase in output could only be achieved through a combination of sophisticated technologies, including an advanced hydrogen gas and distilled water cooling system and 27-kV high-voltage insulation. Every effort was made to enhance the performance and reliability of the generator by fully exploiting advanced analytical procedures and tests including rotor vibration analysis, stator core end electromagnetic analysis, network ventilation analysis, and stress analysis of all key parts of the generator. Full-scale rotational tests including efficiency, temperature increases, shaft vibration, and other performance measures confirm that the 1,120-MVA turbine generator more than satisfies all design specifications.

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RELEVANT SITES

	HITACHI LARGE GENERATOR
	The Hitachi Hyoron (Japanese Only)

KEYWORDS

generator, capacity, completion, 1120MVA, PF

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