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Installation of world's largest single 1 million kw unit commences

Updated: 2020-02-25

Installation of world's largest single 1 million kw unit commences

The first stator frame section of the No 2 hydro-generator unit on the left bank of Baihetan Hydropower Station is hoisted into place. [Photo/POWERCHINA]

After two hours of careful debugging, the first stator frame section of the No 2 hydro-generator unit on the left bank of Baihetan Hydropower Station was hoisted into place.

It was fitted by the Sinohydro Engineering Bureau No 4 Co, a subsidiary of POWERCHINA, marking the start of the installation of the world's largest single capacity 1 million kw unit.

The stator frame is composed of nine sections. The outer diameter of the frame is 19,330 millimeters, and the upper and lower ring plates have a total of nine layers, of which four upper ring plates are non-magnetic steel structures.

The inner diameter of the ring plate of layer one, from the lower end to the upper end of the frame, is 16,850 mm. The inner diameter of ring plate of layer two to layer nine is 17,600 mm. The clear height of the frame is 7,295 mm.

 Since the start of the mechanical and electrical installation project on the left bank of Baihetan Hydropower Station in the second half of 2019, Sinohydro Bureau No 4 has faced severe issues of tight construction schedules and huge construction challenges.

Installation of world's largest single 1 million kw unit commences

A worker directs the hoisting. [Photo/POWERCHINA]

In order to ensure the power generation target of the two units in July 2021, the construction plan, human resources, equipment guarantees and other aspects have been carefully organized.

In the face of the novel coronavirus pneumonia outbreak during the Spring Festival this year, 60 employees gave up their vacation and maintained construction work while adhering to epidemic prevention and control measures.

Despite the tight personnel numbers, the grinding work of the pedestal of No 2 machine, the cleaning of the pit foundation pier and the installation of all embedded parts were completed.

Before the hoist, the project department made a detailed hoisting plan and disclosed the technical aspects of the safety of the stator frame hoisting to the manufacturer and the supervisor. During the hoisting, all workers performed their duty, which ensured the safety, high quality, and high efficiency of the project.

At present, the installation of units No 1 and No 2 on the left bank of Baihetan Hydropower Station has not been impacted by the epidemic, and all work is proceeding smoothly according to the original plan.

Installation of world's largest single 1 million kw unit commences

Workers carefully install some infrastructure. [Photo/POWERCHINA]