Shandong Electric Power Grid Construction: Drawing a Blueprint with Longitudinal and Latitude Plans

● Strong main grid promotes development: 500 kV ring network structure has been completed; the total transformation capacity of the power grid is 91.25 million kVA, and there are 136 500 kV lines.

●Upgrade rural power grid to achieve moderate prosperity: The "every well has electricity" project with a total investment of 11.6 billion yuan has been completed, benefiting 41.83 million mu of farmland.

On July 12, Wu Ruige, a grape grower in Sunshousan Village, Laixi City, Shandong Province, guided tourists to pick grapes while smiling and introducing: "Since the power supply company has connected the electricity to the fields and watered them in time, the quality of my grapes has improved significantly and the yield has increased greatly. I heard from the older generation that it was very difficult to use water in the past, let alone develop the fruit planting industry. Now it's really a good time!"

Since the first electric light in Shandong Province was lit on the shores of Jiaozhou Bay 121 years ago, and especially in the 70 years since the founding of New China, Shandong power workers have worked hard and strived for progress. The Shandong power grid has achieved leapfrog development from nothing to something, from weak to strong, and has injected continuous impetus into the province's rapid economic and social development and the people's pursuit of a better life.

From a handful of stars to an independent network

Shandong Power Grid Enters a Period of Rapid Development

On July 4, the Shenshan 500 kV substation in Jimo District, Qingdao City, successfully delivered power. This is the 50th 500 kV substation in Shandong Power Grid and the 5th in Qingdao. During the peak summer period this year, Qingdao will increase its power supply capacity by 1 million kVA, which can greatly ease the power supply tension in Qingdao Power Grid and effectively meet the growing power load needs of the "Blue Silicon Valley" and other regions.

Shandong is one of the earliest provinces in China to have access to electricity. As early as 1898, German engineer Perlsmann installed two 50-horsepower (75-kilowatt) diesel generators in Qingdao, marking the beginning of Shandong's electric power development.

Due to the military aggression and economic plunder of the imperialist powers, coupled with years of war, my country's power industry is backward in equipment, small in scale, and slow in development. Shandong's power industry is also stumbling and developing with difficulty. Until the end of 1949, the province's installed power generation capacity was only 130,000 kilowatts, the annual power generation was 209 million kilowatt-hours, and the per capita electricity consumption was 4.5 kilowatt-hours. The province's transmission lines are only 143.4 kilometers long, and the highest voltage level is 33 kilovolts. Power plants in various places are operated in isolation, and the voltage levels are not uniform.

After the founding of the People's Republic of China, Shandong's electric power industry has made great progress. In February 1957, the first 110 kV high-voltage power transmission and transformation project in Shandong Province, the Shentou-Jinan power transmission line, was completed and put into operation, connecting the two power supply areas of Zibo and Jinan. The four power plants in Jinan, Shentou, Hongshan and Nanding were connected to the grid and operated, forming Shandong's first cross-regional power grid, the Luzhong Power Grid. This was also the beginning of Shandong's construction of a unified power grid.

In December 1973, the first 220 kV line in Shandong, Laiwu Power Plant-Weijiazhuang Transmission and Transformation Project, was completed and put into operation. Shandong Province had its first 220 kV substation-Zibo Weijiazhuang Substation, and its first 220 kV line-Laiwei Line. In the following 30 years, the 220 kV line, as the main artery of Shandong's "south-to-north power transmission" and "west-to-east power transmission", received great attention and rapid development, and the 220 kV power grid became the main grid.

After the reform and opening up, Shandong Electric Power actively adapted to the actual requirements of "sending electricity from the south to the north" and "sending electricity from the west to the east" in the province, gave full play to its collective advantages, increased investment, and accelerated the construction of power grids. In December 1980, the Weifang-Zhaoyuan 220 kV transmission line and the 220 kV Zhaoyuan substation were completed and put into operation, and the Yantai power grid was incorporated into the Shandong power grid, marking the official completion of the Shandong unified power grid with 220 kV lines as the main grid.

In November 1987, the first 500 kV project in Shandong Province, Zouxian-Jinan-Weifang power transmission and transformation project, was completed and put into operation, marking the official entry of Shandong Power Grid into the era of 500 kV large-capacity and ultra-high voltage power grid. After more than ten years of construction and development, in September 2000, the 500 kV Linyi-Rizhao-Qingdao-Weifang power transmission and transformation project was completed and put into operation, marking the completion of the main grid of Shandong Power Grid's 500 kV large ring network.

By the end of 2000, the province had built 873.9 kilometers of 500 kV transmission lines, four 500 kV substations, and a transformer capacity of 3.92 million kVA. Today, Shandong Power Grid has put into operation 50 500 kV substations with a transformer capacity of 91.25 million kVA, and 136 500 kV lines with a length of 9,308 kilometers.

Smooth the channel for “foreign electricity to enter Shandong”

Shandong joins the national power grid family

On July 8, Shandong Power Grid received external power through the "External Power into Shandong" channel, breaking the 20 million kilowatt mark for the first time, with an instantaneous maximum of 20.389 million kilowatts, an increase of 18.29% year-on-year. The implementation of the "External Power into Shandong" strategy is a major strategic adjustment in the construction of Shandong Power Grid. Against the backdrop of continued growth in energy demand and the difficulty in changing the power supply structure in the short term, "External Power into Shandong" has become a green hope for Shandong's high economic growth and low emissions.

On March 1, 2005, the Xin-Liao double-line connecting the 500 kV Xinan substation in Hebei and the 500 kV Liaocheng substation in Shandong was completed and put into operation, marking the official interconnection of the Shandong Power Grid and the North China Power Grid. Shandong ended the era of independent provincial power grid and was integrated into the national power grid.

In September 2009, the second channel for Shandong Power Grid to connect with North China, the 500 kV Huangbin double line, was completed and put into operation, and the capacity of Shandong Power Grid to receive power from outside the province increased to 3.5 million kilowatts. In February 2011, the ±660 kV Yindong-Shandong DC transmission project was put into operation in both poles, which is the world's first 660 kV DC transmission project. Since then, the capacity of Shandong Power Grid to receive external power has increased to 7.5 million kilowatts.

In November 2014, the first UHV project in Shandong, the Ximeng-Shandong 1000 kV UHV AC power transmission and transformation project, was officially started. This project is the first batch of UHV projects approved and started in the National Air Pollution Prevention and Control Action Plan, and is the first UHV project in the country to be constructed and managed by a provincial power grid company.

In the 14 years since Shandong Power Grid ended its isolated grid operation in 2005, Shandong Electric Power has vigorously promoted the implementation of the "external power into Shandong" strategy, especially since the 13th Five-Year Plan. With the 1000 kV Ximeng-Shandong, Yuheng-Weifang UHV AC projects, and the ±800 kV Zhalute-Guanggu, Yikezhao-Yinan UHV DC projects put into operation one after another, Shandong Power Grid has entered a new era of UHV AC and DC hybrid connection, and the ability of external power to enter Shandong has continued to improve.

In 2018, Shandong Power Grid received 71.956 billion kWh of external electricity, accounting for about 15% of the total power consumption of the entire grid. This proportion will increase further this year. At the end of the 13th Five-Year Plan, with the completion and operation of the UHV AC expansion ring network project in Shandong, Shandong Power Grid's ability to receive external electricity is expected to exceed 30 million kilowatts, which will fundamentally solve the problem of air pollution prevention and control and total coal consumption reduction in Shandong Province.

The big river is full of water, and the small river is full

Sufficient electricity will help people achieve a better life

On February 4, the Lunar New Year's Eve, tens of thousands of Shandong Electric Power employees stayed at their posts, and 358,200 public distribution substations in the province experienced zero power outages, achieving zero power outages in large substations for six consecutive years.

On December 30, 2014, Shandong Electric Power held a press conference and publicly announced for the first time its promise of "no power outages in substations during the Spring Festival." That year, there were more than 200,000 public substations in urban and rural areas across Shandong Province, with a 10kV distribution line length of about 200,000 kilometers, but only more than 20,000 employees responsible for distribution network operation and maintenance.

After years of continuous investment, the "last mile" of urban and rural power supply in Shandong has achieved a leap from strong to intelligent. According to statistics, from 2013 to 2018, the number of 10 kV distribution lines in Shandong's distribution network increased from 17,080 to 22,512, the connection rate increased from 51.38% to 84.2%, and the number of public distribution transformers increased from 188,000 to 358,200. The intelligence and management level of the distribution network has been effectively improved. The increasingly strong and intelligent distribution network is a solid foundation for achieving "zero power outages" in large areas for six consecutive years.