Shaanbei-Anhui ±800 kV UHVDC Transmission Project

±800 kV DC

DC voltage±800 kV

Transfer capacity8,000 MW

DC line route1,055.097 km

Line towers2,161

Selected SUNENG supply scope

SUNENG supplied selected electrical products and components for the Shaanbei-Anhui ±800 kV UHVDC transmission project.

Project context.

The Shaanbei-Anhui ±800 kV UHVDC project links Baotashan converter station in Fuxian, Yan’an, Shaanxi, with Hezhou converter station in Lujiang, Hefei, Anhui. The 8,000 MW transmission system crosses Shaanxi, Henan and Anhui.

The DC line extends 1,055.097 km and uses 2,161 towers with six-conductor bundles. Sending- and receiving-end installations include converter transformers, valve halls, DC yards and AC filter banks, with 750 kV AC connections at Baotashan and 500 kV AC connections at Hezhou.

Electrical scope

Provincial route sections: Shaanxi: 244.406 km; Henan: 487.446 km; Anhui: 323.245 km.
Sending-end transformers: Baotashan: 24 converter transformers rated 407.5 MVA, plus four spares.
Receiving-end transformers: Hezhou: 24 converter transformers rated 397 MVA, plus four spares.
AC connections: Nine 750 kV outgoing circuits at Baotashan and eight 500 kV outgoing circuits at Hezhou.
AC filter capacity: Baotashan: 5,045 Mvar; Hezhou: 5,600 Mvar.
Overhead-line arrangement: Bipolar DC line with six-conductor bundles.