China / Xiushui and Wuning, Jiujiang, Jiangxi
Maao 220 kV Transmission and Substation Project
220 kVSUNENG supplied selected electrical products and components for the Maao 220 kV transmission and substation project.
Project context.
The Maao project combines a new 220 kV substation in Xiushui County with transmission connections to Yejiashan and Xinning substations. Maao is equipped with two 180 MVA main transformers, two 220 kV outgoing bays and four 110 kV outgoing bays. Each remote-end station received one additional 220 kV outgoing bay.
The completed Yeao route is 30.162 km long, including a 0.25 km cable section. The Ningao route extends for 73.577 km. Their corridors cross hills, fields and river valleys, with shared-tower sections approaching Maao. The photographs show transformer installations, station equipment, tower connections and the different line settings.
Electrical scope
- Maao substation
- Two 180 MVA main transformers; two 220 kV and four 110 kV outgoing bays
- Reactive compensation
- 6 × 8 Mvar shunt capacitors and 2 × 10 Mvar shunt reactors
- Remote-end bays
- One additional 220 kV outgoing bay at Yejiashan and one at Xinning
- Yeao line
- 30.162 km, including 28.934 km of single-circuit overhead line, shared-tower sections and 0.25 km of cable
- Ningao line
- 73.577 km, including 70.385 km of single-circuit overhead line and shared-tower sections
- Yeao structures
- 79 towers along the route: 78 new and one existing tower reused
- Ningao structures
- 191 towers along the route: 180 new, seven reused from the Xinning–Putang line and four shared with the Yeao line
- Line conductors
- Twin-bundle JL/G1A-400/35 and JL/G1A-400/50 ACSR conductors
Electrical drawings
Review the electrical sheets and their equipment and route annotations.
Field imagery
Station equipment and line routes.
Maao substation and transformers
The main transformers, station buildings and equipment setting.
Tower structures and connections
Terminal and route towers, with views of steelwork joints, insulators and conductor arrangements.
River crossings and hill corridors
Overhead spans across river valleys and the ridge sections of the two 220 kV routes.
Discuss a similar requirement.
Send a drawing, BOM, voltage level or technical specification for an initial review.