The procurement and installation project of the power supply system of the first phase of Dalian Metro Line 4 has been filed by Dalian City, Liaoning Province. The construction was approved by Dafa Gai Approval Zi [2020] No. 64, and the tenderer was the financial department for the funds required for the construction and development of Dalian public transportation. The project contributes 40% of financial funds and 60% of non-financial funds, and the project has met the bidding conditions, and is now open for bidding for the first and second bids of the power supply system procurement and installation project of the first phase of Dalian Metro Line 4.
The construction period of the two bids is required to start on May 20, 2024 and be completed on May 31, 2026.
The first phase of Dalian Metro Line 4 starts from Yingchengzi in the west, reaches Barracuda Bay in the east, and plans green belts along Yingchengzi Planning Road, Xingfu Village Planning Road, Lushun North Road, Songjiang Road, Dongfang Road and Barracuda Bay. The main line is about 23km long, all of which are underground lines, with 17 stations, and 1 Muchengyi vehicle base on the east side of Shenhai Expressway and the south side of Lushun North Road.
The power supply system adopts 66 35kV two-level centralized power supply mode, and a total of 2 main substations are set up on the whole line, of which: Muchengyi Vehicle Base is set up and 1 main substation is sharedOn the north side of Barracuda Bay Station, the main substation and the control center are shared by Line 1.
The traction power supply system adopts DC1500V overhead catenary power supply system, and 11 new traction substations are built along the line, including 10 on the main line and 1 on the Muchengyi depot. Each station is equipped with a step-down substation (when the station is equipped with a traction substation, it is jointly built with a traction step-down hybrid substation), and a total of 4 follow-up step-down substations are set up in the depot and the section where the load is large.
The first phase of Dalian Metro Line 4 starts from Yingchengzi and ends at Barracuda Bay. After completion, it will become the east-west skeleton line in the north of the core of Dalian, connecting functional areas and large-scale residential areas such as the Ecological Science and Technology City, Xinzhaizi High-intensity Residential Area, Paoya Village Affordable Housing Area, Shandong Road Residential Area, Jinjiajie Residential Area, Barracuda Bay Urban Public Center, etc., effectively alleviating the travel pressure of residents along the line and improving the travel convenience and accessibility of surrounding citizens.
At the same time, Metro Line 4 will be transferred to the lines that have been opened for operation and the planned lines respectively, forming an east-west fast and direct passenger transport channel in the north of the core area of Dalian, which will effectively promote the social and economic development of Dalian, improve the comprehensive competitiveness of the city, drive the development of key areas along the line, and realize the transportation-guided urban development.