Qujiang Pumped-Storage 500 kV Outgoing Connection

500 kV

Voltage500 kV

Line route37.678 km

New towers107

Added line bayOne at Xiajin

Selected SUNENG supply scope

SUNENG supplied selected electrical products and components for the Qujiang pumped-storage 500 kV outgoing-connection project.

Project context.

The Qujiang pumped-storage outgoing project connects the power station to Xiajin 500 kV substation. The route passes through Qujiang District and Longyou County in Quzhou, Zhejiang.

The 37.678 km connection combines single-circuit towers with a short section using one side of double-circuit towers. At Xiajin, the work adds one 500 kV outgoing bay and a 60 Mvar shunt reactor on the low-voltage side of No. 4 main transformer.

Electrical scope

Single-circuit section: 34.719 km of single-circuit overhead line.
Shared-tower section: 2.959 km using one side of double-circuit towers.
Tower arrangement: 99 single-circuit towers and eight double-circuit towers.
Conductors: Four-conductor bundles using JL3/G1A-400/35 and JL3/G1A-400/50 conductors.
Optical ground wire: 48-core OPGW on the single-circuit section and 72-core OPGW on the double-circuit-tower section.
Substation additions: One 500 kV outgoing bay and one 60 Mvar low-voltage-side shunt reactor at Xiajin.

Field imagery

Station equipment and line routes.

Xiajin substation connection

Xiajin substation and the new 500 kV outgoing-line bay

New low-voltage-side shunt reactor at Xiajin substation

Pumped-storage outgoing line

500 kV outgoing line through the Qujiang hills

Tower and conductor spans along the pumped-storage connection

Tower steelwork and overhead conductor arrangement

Transmission tower on the ridge corridor

Outgoing-line corridor in the reservoir-area landscape

Tower and spans along the Qujiang connection

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