Image of the giant transformer station of the 500 kV circuit 3 project in Pho Noi reaching the finish line ahead of schedule

Regarding power regulation, Station Chief Pham Van Cuong said that there are two control levels. The 500 kV voltage level is controlled by the National Power System Control Center (A0); the 220 kV and 110 kV voltage levels are controlled by the Regional Power System Control Center (A1). The power plant will change the wiring and reverse the direction. Which plant generates, increases or decreases power will be directed by the National Power System Control Center (A0). Regarding the 500 kV line, circuit 1 brings power from the North to the South; circuit 2 brings power from the South to the Central region, and circuit 3 continues to bring power from the Central region to the North. If the North uses a lot, the South will push it out; if the South uses a lot, the North will push it in. The system will automatically adjust the frequency according to the load system.

The 500 kV line 3 extension project is a key project that plays a particularly important role in national energy security. The 500 kV line 3 extension project has a length of 514 km, connecting from Quang Trach to Pho Noi ( Hung Yen ) with a total investment of 23,000 billion VND. This project was approved in the master plan 8 to carry out inter-regional power transmission to the North, increasing power supply capacity.

Source: https://baohaiduong.vn/hinh-anh-tram-bien-ap-khung-du-an-500kv-mach-3-tai-pho-noi-can-dich-truoc-han-386019.html