[ferro-alloys.com]

  Starting from Ningxia, which is located in the northwest of China, there are two power "expressways" extending eastward. They fly over Changhong, winding through the Gobi, desert and Yellow River Since the Yindong direct current transmission project (Ningxia Ningdong Shandong Qingdao) was officially put into operation in 2011, Ningxia has continuously sent thermal power and green power to more than ten provinces across the country through the "west to East power transmission" channel.

  Ningxia has also become the first provincial-level power grid in China to "send electricity from outside" more than "sell electricity at home". In this process, Ningxia has continuously explored "new fire" bundling, coordinated development, solved unprecedented technical problems, and contributed "Ningxia wisdom" to ensure the long-term safe operation and high-efficiency commercial operation of the "west to East power transmission" channel.

  "Discharge" across the country

  It is more than 40 kilometers away from Yinchuan, the capital of Ningxia, and is located on the edge of Mu Us sandy land. There are many iron towers on a land of more than 430 mu. In the past 10 years, more than 300 billion kwh of electricity has been continuously transferred from here to Qingdao, Shandong Province, and distributed to some cities in North China.

  This is the first ± 660kV DC transmission project in the world - Yinchuan East converter power station. This "power artery" with a length of more than 1300 kilometers, 20% of which is located in the desert, has been operating safely for more than 3600 days. This "aircraft carrier" power project, which opens the north channel of "west to East power transmission" in China, has been in full load operation for a long time, and has also become the best trans provincial and trans regional DC transmission project in China's commercial operation.

  Starting with Yindong project, six years later, another "power artery" in Ningxia, Lingwu ± 800 kV HVDC transmission project (Lingwu, Ningxia Shaoxing, Zhejiang) was completed. As the first operation project of "accelerating the construction of 12 key transmission channels in the air pollution prevention and control action plan" in China, the accumulated power transmission to Zhejiang has exceeded 165 billion kwh since its operation. At present, it is also in the extreme load operation state, and the energy utilization rate ranks first in the UHV direct current project in China.

  In the past 10 years, Ningxia's power transmission has expanded from Qinghai, Tibet and Shandong to Shanghai, Zhejiang, Jiangsu, Hubei and Hunan. Ningdian, one of the earliest important transmission terminals of the national "west to East power transmission" project, has achieved a 10 billion step-by-step growth for five consecutive years during the 13th Five Year Plan period, with an average annual growth rate of 26.8%.

  "The power transmission capacity of Ningxia will increase from 4 million kilowatts in 2010 to more than 16 million kilowatts in 2020. The accumulated power transmission capacity in 10 years will exceed 420 billion kilowatt hours. The scale of power transmission is in the forefront of the State Grid Corporation. Ningxia power grid has also become the first provincial power grid in China to" send out "more than" sell in. " He Bo, assistant general manager of State Grid Ningxia Electric Power Co., Ltd., said.

  In situ conversion of 160 million tons of standard coal, emission reduction of more than 400 million tons of carbon dioxide and more than 100 million tons of carbon dust In the process of giving full play to the advantages of "large capacity, long distance and high efficiency" of HVDC transmission, Nanjing power transmission not only promotes the transformation of local energy advantages into economic advantages, but also alleviates the tense situation of power consumption in East China and North China, highlighting the environmental, social and economic benefits of China's "west to East power transmission" project.

• [Editor:Catherine Ren]