Hunan Nuowei Technology Co., Ltd

Hunan Nuowei Technology Co., Ltd

Hunan Nuowei Technology Co., Ltd

Science and technology are the primary productive forces

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Yunnan Jinsha River Xiluodu Hydropower Station
time：2023-05-18 10:10:00

Basic Information

  • Location: Lower reaches of the Jinsha River at the border of Yongshan County, Zhaotong City, Yunnan Province, and Leibo County, Liangshan Prefecture, Sichuan Province.
  • Project Positioning: The second cascade in the "One Reservoir, Six Cascades" development plan for the lower Jinsha River; the world's third-largest hydropower station (after the Three Gorges and Itaipu).
  • Drainage Basin: Control basin area of 458,000 km² above the dam site, accounting for 80.4% of the Jinsha River basin.
  • Engineering Purpose: Primarily for power generation, with additional benefits for flood control, navigation, and sediment regulation.
  • Key Components: Double-curved arch concrete dam, flood discharge structures, water conveyance system, underground powerhouse, and switchyard.

  • Sales quantity: 54 sets of grouting recorders, equipped with flow meters, pressure gauges, density meters, heave observation devices, data logging systems, and data processing software

Engineering Scale and Technical Parameters

Parameter Data
Total Installed Capacity 13,860 MW (18 x 770 MW units)
Normal Pool Elevation 600 m
Dead Water Level 550 m
Total Reservoir Capacity 11.66 billion m³
Regulating Storage 5.60 billion m³
Maximum Dam Height 285.5 m (world's tallest double-curved arch dam)
Dam Crest Length 600 m
Annual Power Generation 5.795 billion kWh (5.83 billion kWh in 2023)
Design Annual Output 5.795 billion kWh
Overall Efficiency 80.5%
Single Unit Capacity 770 MW (one of the world's largest hydro-generator units)

Construction Timeline

  • 2005: Project preparation began
  • 2007: Feasibility study approved
  • 2008: Main construction commenced
  • 2013:
    • June: First generating unit commissioned
    • December: All 18 units operational
  • 2014: Passed national final acceptance
  • 2023: Cumulative generation exceeded 500 billion kWh (as of year-end)

Technological Breakthroughs and Innovations

  1. World-Class Dam Technology:

    • World's tallest double-curved arch dam (285.5 m)
    • "Mass Concrete Temperature Control and Crack Prevention Technology" achieved "zero cracks"
    • 3D laser scanning ensured precise dam construction

  2. Turbine Technology Breakthroughs:

    • 18 x 770 MW Francis turbines (world's largest single-unit capacity)
    • "Full-Flow 3D Optimized Design" for turbine runners
    • Turbine efficiency at 96.5% (industry average: 93%)

  3. Ecological Innovations:

    • Fish propagation station (1 million rare fish released annually)
    • "Ecological Flow Release" to protect downstream ecosystems
    • Integrated "ecological restoration + soil conservation" measures

Project Benefits

Category Benefits
Power Generation - Cumulative output: 500+ billion kWh (as of 2023)
- Annual generation: 5.8 billion kWh (saves 1.7 million tons of standard coal/year)
- Emissions reduction: 4.5 million tons CO₂/year
Grid Benefits - Key "West-to-East Power Transmission" source (20% of Yunnan's inter-provincial transmission)
- Peak regulation capacity of 10 million kW for East China Grid
Socio-Economic Benefits - Resettled 158,000 people along the Jinsha River
- Boosted tourism and logistics in surrounding areas (annual income increase: 1.2 billion yuan)
Environmental Benefits - Protects habitats for 12 rare fish species
- Reduced soil erosion by 40% in the Jinsha River basin

Operations and Management

  • Owner: China Three Gorges Corporation
  • Operator: Xiluodu Power Plant (Three Gorges Group)
  • Installed Capacity: 13,860 MW (18 units)
  • 2023 Operational Data:
    • Annual generation: 5.83 billion kWh
    • Power supply: East China and Central China grids
    • Contribution: 15% of "West-to-East Power Transmission" total
  • Management Innovations:
    • China's first intelligent hydropower plant operation system
    • "Unmanned Duty, Minimal Staff" model
    • National Green Hydropower Demonstration Station (2021)

Major Honors

  • 2014: National Quality Project Gold Award
  • 2015: Zhan Tianyou Award for Civil Engineering
  • 2016: ICOLD (International Commission on Large Dams) "High Dam Engineering Award"
  • 2020: National Energy Administration "Green Hydropower Demonstration Project"
  • 2023: Selected as one of the "70 Years of Major Projects in China's Power Industry"

Comparison with Lihua Hydropower Station

Parameter Xiluodu Hydropower Station Lihua Hydropower Station
Installed Capacity 13,860 MW 2,400 MW
Dam Height 285.5 m (double-curved arch) 155 m (CFRD)
Annual Generation 5.8 billion kWh 1.07 billion kWh
Engineering Status World's third-largest hydropower station Third cascade in Jinsha River midstream
Technological Breakthroughs 770 MW world-largest units 155 m high dam one-stage construction

Strategic Significance

  1. Energy Security: Core power source for "West-to-East Power Transmission," ensuring stability of East China Grid.
  2. Dual Carbon Goals: Cumulative CO₂ reduction of 150 million tons (equivalent to planting 400,000 hectares of forest).
  3. Basin Development: Optimized scheduling with Xiangjiaba and Wudongde stations for Jinsha River cascade operations.
  4. Technical Benchmark: Transitioned China's hydropower technology from "follower" to "global leader."

Key Update (June 2024): Xiluodu Power Station has generated 512 billion kWh cumulatively, saving 15.3 million tons of standard coal and reducing 400 million tons of CO₂ emissions, solidifying its role as a core source in the "West-to-East Power Transmission" strategy.

The Xiluodu Hydropower Station is a milestone in Jinsha River development. Its world-class scale, technological innovation, and ecological benefits not only support national energy security but also set a global standard for hydropower engineering, offering a "Chinese solution" to the world's hydropower challenges.