On October 10, construction commenced on Huangshan No.2 500 kV Power Transmission and Transformation Project, the first key 500 kV project of Anhui's power grid under the 15th Five-Year Plan.

The project carries a total investment of approximately 1.25 billion yuan. A new Huangshan No.2 500 kV substation will be built in Guilin Town, Shexian County, Huangshan City. It is planned to install four 1,000 MVA main transformers. For the current phase, one 1,000 MVA main transformer, four 500 kV outgoing circuits and ten 220 kV outgoing circuits will be constructed. Bays will be expanded at the Heli and Huizhou 500 kV substations. In tandem, 163.7 kilometers of 500 kV transmission lines will be built, including lines from Huangshan No.2 to Heli, Huangshan No.2 to Huizhou, and switching connection lines for the Jixi Pumped Storage Power Station to Huangshan No.2. The project is scheduled for completion and commissioning in June 2028.

Once operational, the project will fill the gap in 500 kV transformer capacity in the Huangshan area, overhaul the power grid structure that previously relied on a single support point, and markedly improve the power supply reliability and operational flexibility of the southern Anhui power grid. It will optimize power supply networks covering the downtown area and tourist attractions. Meanwhile, it will deliver a more stable grid platform for grid integration and outward transmission of clean energy from pumped storage facilities such as Jixi Pumped Storage Power Station. The project is of great significance to Huangshan’s cultural and tourism industry, rural revitalization and green and low-carbon transition.

To ensure high-standard, high-quality commencement, during the feasibility study stage, State Grid Anhui Electric Power Construction Co., Ltd. organized comparative studies on multiple alternatives for the substation site and line routes. Three-dimensional modelling and BIM technology were adopted for repeated site surveys and comparisons. The design avoids ecological protection redlines, contiguous forestland and densely populated residential areas to optimize the engineering scheme from the outset. At the preliminary design stage, the company arranged reviews of design proposals and techno-economic assessments. It refined equipment selection, route optimization and special designs for environmental and water conservation, guaranteeing technically advanced and economically viable schemes.

Source: Anhui Daily