new construction and installation project of Tai Zhou 1000kV substation

The Taizhou 1000kV substation is one of the core nodes of the UHV backbone power grid in East China, aiming to improve the regional power transmission capacity, optimize the energy structure of the Yangtze River Delta, and support the large-scale grid connection and consumption of new energy. After completion, the project will significantly enhance the inter-provincial interconnection capacity of the power grid and help achieve the "dual carbon" goals.

Project content and technical highlights

1. UHV core equipment integration

• Main transformer: 1000kV single-phase double-winding UHV transformer, equipped with intelligent cooling system and online monitoring device to ensure long-term stable operation of equipment.

• GIS equipment: Fully enclosed gas-insulated switchgear (GIS), integrated circuit breakers, disconnectors, grounding switches and other modules, small footprint, high reliability, suitable for coastal high humidity, high salt fog environment.

• Reactive power compensation system: Equipped with ±200Mvar static synchronous compensator (STATCOM), dynamically adjust voltage and improve the anti-disturbance capability of the power grid.

2. Intelligent design and construction

• BIM full life cycle management: Apply BIM technology throughout the entire process from design to operation and maintenance to achieve 3D modeling, collision detection, construction simulation and digital handover.

• Intelligent monitoring system: Deployment of UHV equipment status monitoring (partial discharge, oil chromatography analysis), robot inspection and AI fault warning platform.

3. Green construction and disaster resistance

• Environmental protection measures: Low-noise equipment and dust suppression systems are used during the construction period to reduce the impact on the surrounding ecology; rainwater recycling systems and photovoltaic energy storage integrated lighting are set up in the station.

• Typhoon-resistant design: The entire station structure is designed according to the wind load of once in a hundred years, and the equipment foundation adopts deep pile foundation and shock absorption technology to adapt to the typhoon-prone environment along the coast of Taizhou.

4. Supporting power transmission project

• 1000kV outgoing line interval: 6 UHV lines are planned to connect the adjacent converter station and new energy base.

• Grounding electrode project: Construction of deep well grounding electrode system to ensure the safe discharge of lightning strikes and short-circuit currents.

Implementation capabilities and advantages

1. UHV technology accumulation

• Relying on the parent company Shanxi Ketong Electric Power's more than 20 years of experience in the UHV field, the team has participated in national UHV projects such as Southeast Shanxi-Nanyang-Jingmen and Zhangbei Flexible Direct Current.

2. Full process control

• Design side: Cooperate with the top domestic power design institute to optimize the station layout and electromagnetic environment control plan.

• Purchasing side: Strategic cooperation with manufacturers such as Pinggao, XD, and TBEA to ensure that the localization rate of key equipment exceeds 95%.

• Construction side: Hydraulic lifting devices are used to hoist thousand-ton transformers, and laser calibration technology is used to achieve millimeter-level installation accuracy of GIS equipment.

3. Quality and safety system

• Implement the State Grid Q/GDW standards and IEC international specifications, pass the three-level quality inspection, and archive the entire hidden project with imaging.

Project Significance

• Economic benefits: Annual power transmission exceeds 50 billion kWh, which can replace about 15 million tons of standard coal consumption and reduce carbon dioxide emissions by 40 million tons.

• Social benefits: Relieve the peak power consumption pressure in the Yangtze River Delta and provide reliable power supply support for Taizhou Port Industrial Zone and offshore wind power cluster.