Local power transformer for wind farm
South Africa, Western Cape: Zest WEG has delivered a locally manufactured main power transformer to a wind farm project near Swellendam in the Western Cape.
Image for Illustration purposes
South Africa, Western Cape: Zest WEG has delivered a locally manufactured main power transformer to a wind farm project near Swellendam in the Western Cape.
The 45 MVA transformer will receive 33 kV from the wind turbines and step this up to 132 kV for the main power grid.
The transformer was built at Zest WEG’s Heidelberg facility. Following comprehensive testing at the facility’s laboratory in 2019, the transformer was delivered to site and assembled under the supervision of Zest WEG engineers in January 2020. They also conducted full on-site testing of the unit, as well as cold commissioning.
“The size of the transformer – at 5,7 m high and 7 m long – meant that it could not be transported in one piece,” Brown says. The total weight of the assembled unit is 70 t.
Stuart Brown, sales team leader, transformer division at Zest WEG, says the design and construction of the power transformers shows the high level of expertise and technical capacity in South Africa.
“With two of the few local transformer manufacturing operations in the country, we have the added advantage of being able to draw on the technical experience of our parent company, the world-wide WEG group,” says Brown. “In designing power transformers for renewable applications, we gain valuable insights and important skills transfer from WEG experts in the US and Brazil.”
Ongoing technological improvements and constant upgrades at the Heidelberg plant ensures its state-of-the-art capability. The testing conducted at the factory includes lightning impulse withstand tests and temperature-rise tests, especially relevant to simulate the potentially high temperatures where transformers are located.
Source: Engineering News