A closer look at the 500kV power line through Ha Tinh, which is nearing completion.

01/07/2024 | 11:56

TPO – Of the 285 power poles in Ha Tinh province , many locations have gradually completed the cable installation. Meanwhile, contractors are making efforts to erect poles for some other power poles in difficult and challenging terrain, aiming for early completion as planned.

A close-up view of the 500kV power line through Ha Tinh. Video : Pham Truong

In early July, although the 500kV circuit 3 Quang Trach – Pho Noi transmission line project could not be energized by June 30th as targeted by the Prime Minister , thousands of officials, engineers, and workers in the power industry along the line were striving to complete the project as soon as possible.

The 500 kV circuit 3 power line project in Ha Tinh province spans over 141 km, encompassing 285 tower foundation locations and 284 tower spans/113 spans across 9 districts and towns. This area is considered to have the largest workload and the most challenging terrain among the provinces through which the power line passes. After months of construction, the wire laying work is nearing completion at many locations along the route.

According to the design, each utility pole will have 26 wires (24 power cables, 1 fiber optic cable, and 1 lightning protection wire).

Despite the heat, groups of workers persevered, working diligently to complete the power line. The image shows the pole located in Hoa Lac commune (Duc Tho district, Ha Tinh province), where workers are completing the final stage of pulling the wire.

Meanwhile, in some locations with rugged terrain, high mountains, and rivers and lakes, the erection of pylons is being urgently completed due to difficulties in transporting materials and equipment.

The construction of pole 175, located next to Boc Nguyen Lake (Cam Thach commune, Cam Xuyen district), is nearing completion and is ready for the wire pulling phase.

According to engineers from Song Da Construction and Services Joint Stock Company, this is one of the three tallest support towers on the line, standing at 145 meters high and weighing 426 tons. It utilizes a tubular tower joining technology, the first of its kind used in a super high-voltage power line project in Vietnam. The contractor spent a considerable amount of time erecting these towers.

At the poles crossing residential houses and irrigation canals of Ke Go Lake in Cam My commune (Cam Xuyen district), the contractor had to erect scaffolding as supports to pull the wires.

Mr. Luong Thanh Trung (PC01 Hanoi Joint Stock Company) said that each roll of power line wire is 2,000-2,400m long and weighs 5-6 tons. Laying and hanging the wires requires not only human effort but also the use of plows and winches.

"Laying the cables requires traversing forests, mountains, lakes, and canals, making it very difficult. In challenging locations, we have to use supports, lift the cables, and pull them along guide lines to avoid cross-linking," Trung said. In the image, workers carefully secure each scaffold to ensure safety during the cable pulling process.

Groups of workers toiled through lunchtime to ensure the goal of bringing electricity to power was met as soon as possible.

According to representatives from the Central Power Projects Management Board (CPMB – the investor of the 500 kV circuit 3 transmission line project, Quang Trach – Quynh Luu section), 160 poles have been erected, 125 are currently being erected, and 15 out of 113 spans have been strung. Currently, contractors are accelerating progress to complete the remaining sections of the transmission line as soon as possible.

Pham Truong