三条路径看东北绿电外送：修通道、建汇集站、换形态Three paths to look at the transfer of green electricity in Northeast China: building channels, constructing collection stations, and changing the form

In October on the Songnen Plain, the wind comes slanting from the west. In the northern part of Daqing, inside the 500 kV power transmission and transformation engineering station of Lindian New Energy, construction workers are transporting equipment into the plant building box by box, while outside the walls, iron towers are lined up along the horizon. Over a thousand kilometers away, on the ridges of western Liaoning, wind turbine blades are turning slowly. Three scenes point to the same question—once the electricity is generated, how is it sent out?

First, let's look at the mismatch between resources and load. As of the end of September this year, the total installed capacity of wind and solar renewable energy in Heilongjiang Province reached 30.164 million kilowatts, accounting for 51.6% of the province's total installed power capacity. So far, Jilin Province has a total installed capacity of 28.3049 million kilowatts of renewable energy, accounting for 51.44% of the province's total installed capacity, making it the largest power source in the province, with wind power installed capacity accounting for more than 70% of the renewable energy capacity; in the first three quarters of this year, Jilin's renewable energy power generation reached 32.492 billion kilowatt-hours, a year-on-year increase of 4.75%, accounting for 37.8% of the province's total power generation, with a renewable energy utilization rate of 92.7%. Liaoning's structure is even more special: 47% of the province's wind and solar renewable energy installed capacity is concentrated in western Liaoning, while the electricity load in western Liaoning accounts for only 20% of the province's total. In all three provinces, the share of renewable energy installed capacity has exceeded half, but the share of electricity generated still only accounts for just over one-third. In Heilongjiang, some of the electricity is consumed within the province, while a portion is transmitted outside the province through the 500 kV grid, covering 19 provinces in total.

The first route is to build transmission channels. Recently, the 500 kV Liaoxi–Liaozhong section enhancement project was put into operation, with 321 transmission towers and 259.851 kilometers of power lines, increasing the transmission capacity from Liaoxi to Liaozhong by 2.5 million kilowatts. According to estimates from the State Grid Liaoning Electric Power Research Institute, by the end of the 15th Five-Year Plan, the power transmission demand on the outgoing section from Liaoxi will have doubled. Zhang Mingli, deputy director of the State Grid Liaoning Power Development Department, stated that during the 15th Five-Year Plan period, Liaoning will coordinate the construction of three major transmission channels in the north, central, and south regions, with a total estimated investment of 6 billion yuan, collectively increasing the section's transmission capacity by over 10 million kilowatts. The "Jidian to Beijing" project relies on ultra-high-voltage direct current transmission channels to deliver clean energy such as wind and photovoltaic power from western Jilin to North China; once fully completed and operational by 2029, it is expected to deliver 26.4 billion kilowatt-hours of clean energy to North China annually.

The second point is to build a collection station. In Lindian, Heilongjiang, a collection hub is under construction, with a substation capacity of 2,400 MVA. Once completed, it can gather and transmit 1.9 million kilowatts of power. The entire station uses indoor GIS equipment and is designed to accommodate the characteristics of strong winter winds, heavy snow, and long periods of low temperatures in western Heilongjiang Province, collecting dispersed wind power resources at the source and converting them into large-scale transmitted electricity.

The third point is to change the form. Jilin has turned part of its green electricity into molecules. The first phase of the Green Methanol Plant by Shanghai Electric Group in Taonan City has been completed and put into operation; 1,000 tons of green ammonia produced in Songyuan is supplied by the "Shenghang Yongle" ship at the anchorage in Xiushan, Zhoushan, Zhejiang, to a 210,000-ton ammonia-powered vessel of the Belgian CMB.TECH Group. Portions of electricity that are difficult to transmit over long distances are converted into green fuels such as hydrogen, ammonia, and alcohol, which can be stored and transported, entering sectors such as shipping where direct electrification is difficult.

In Liaoning, a batch of key projects, including the second phase of the Chuanzhou 500 kV transmission and transformation project, have already started construction. By the end of the 15th Five-Year Plan period, the province's additional 30 million kilowatts of renewable energy access and delivery demand will be supported by this continuously growing power grid. The three parallel paths of channels, hubs, and forms have formed a new pattern for the export of green electricity from Northeast China.

[Source: China Energy News]

[Editor: Xiao Neng]