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500 kV outdoor AIS switchyard - station context
Project archive

China / Yushui, Xinyu, Jiangxi

Luofang 500 kV Main Transformer Expansion

500 / 220 kV
New transformer bank1 × 1,000 MVA
Capacity after expansion2,500 MVA
Line reconnections942.3 m
Construction completed5 June 2026
Selected SUNENG supply scope

SUNENG supplied selected power transmission and distribution products and components for the Luofang capacity-expansion works.

Project context.

The Luofang expansion adds a third main-transformer bank at the existing 500 kV substation in Luofang Town, Yushui District, Xinyu. The new 1,000 MVA bank raises installed transformer capacity from 1,500 MVA to 2,500 MVA.

Completed works include two 60 Mvar shunt capacitor banks, one 60 Mvar reactor and reconnections of four 220 kV circuits. Construction ran from 16 May 2025 to 5 June 2026. The as-built electrical general arrangement below identifies the equipment positions and retained station layout; field photographs distinguish the new transformer bank from the wider station context.

Electrical scope

Main-transformer expansion
New No. 3 bank: 1 × 1,000 MVA; existing banks: 2 × 750 MVA
Reactive compensation
2 × 60 Mvar shunt capacitor banks + 1 × 60 Mvar reactor
Station arrangement
Outdoor 500 kV and 220 kV AIS switchyards; 35 kV compensation area
Bay reconnections
Luobai ↔ Luoyu II; Luozhu I ↔ Luoyu I
Luobai reconnection
331.2 m: 43 m overhead + 288.2 m cable
Luoyu II reconnection
256.7 m cable
Luozhu I reconnection
161.1 m cable
Luoyu I reconnection
193.3 m cable

Electrical drawings

Review the electrical sheets and their equipment and route annotations.

Luofang substation electrical general arrangement - as-built drawing (source PDF p. 31)
Luofang substation electrical general arrangement - as-built drawing (source PDF p. 31)
220 kV bay-reconnection line routes - completion-stage drawing (source PDF p. 51)
220 kV bay-reconnection line routes - completion-stage drawing (source PDF p. 51)

Field imagery

Station equipment and line routes.

New No. 3 transformer bank

New No. 3 main-transformer bank - phase A
New No. 3 main-transformer bank - phase A
New No. 3 main-transformer bank - phase B
New No. 3 main-transformer bank - phase B
New No. 3 main-transformer bank - phase C
New No. 3 main-transformer bank - phase C

Station context

500 kV outdoor AIS switchyard - station context
500 kV outdoor AIS switchyard - station context
220 kV outdoor AIS switchyard - station context
220 kV outdoor AIS switchyard - station context
35 kV capacitor and reactor area - station context
35 kV capacitor and reactor area - station context
Existing high-voltage reactor - station context
Existing high-voltage reactor - station context

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