july|Clean energy galore powers Chinas quest for green future( 二 )

Staff members of the State Grid Corporation Qinghai Branch inspect power transmission lines in Gonghe County of Hainan Tibetan Autonomous Prefecture, northwest China's Qinghai Province, July 9, 2021. (Xinhua/Zhang Manyi)
TECHNOLOGICAL BREAKTHROUGHS
Stretching from the Hainan Tibetan Autonomous Prefecture in Qinghai all the way to the city of Zhumadian in Henan, the Qinghai-Henan UHV project overturned many technological bottlenecks that had plagued long-distance transmission of clean energy.
Fang Baomin, director of the power distribution center under State Grid's Qinghai branch, said that solar and wind power usually only accounts for about 30 percent of the total energy transmitted by the power grid, but the Qinghai-Henan UHV line mainly transports clean energy, posing an unprecedented challenge to the safe operation of the power grid.
【 july|Clean energy galore powers Chinas quest for green future】"Once the transmission is interrupted, the photovoltaic generators will automatically go offline, causing power failure in a large area," said Lu Guoqiang, with the State Grid's Qinghai branch.
After a long period of brainstorming by top experts in China's power sector, a tailored solution was found and the power line and the system were ready in less than eight months.
"The Qinghai-Henan UHV line made a breakthrough in long-distance clean power transmission, and one second of transmission is enough for an ordinary family to use for two years," said Li Binshan, head of the Qingnan converter station at the origin of the line.
The UHV line also adopts advanced technologies to store energy for better use of power. An energy storage power station in the Gobi Desert was plugged into Qinghai's power grid in 2019. It can store power at the peak generating period and discharge power when the power load soars.
More such stations are in the pipeline, which are expected to further stabilize power transmission through the line.

文章插图
A herder grazes his sheep at a green industrial development park in Gonghe County of Hainan Tibetan Autonomous Prefecture, northwest China's Qinghai Province, June 16, 2019. (Xinhua/Wu Gang)
GREEN ENERGY, GREEN DEVELOPMENT
The stable operation of the Qinghai-Henan UHV line also helps generate wealth for the locals.
Every morning, herder Xiang Zhankui takes more than 2,000 sheep to the green industrial development park in the Hainan Tibetan Autonomous Prefecture for grazing.
"In the past, the barren land did not have grass at all. Now, vegetation thrives under the photovoltaic panels and the sheep are well fed and strong," said Xiang, who was hired two years ago as a shepherd in the park on a monthly salary of 3,000 yuan.
"We have higher income now and the environment is also improving," he said.
The green industrial development park in the Hainan Tibetan Autonomous Prefecture created nearly 3,000 jobs for local residents, and Qinghai now has the highest proportion of new energy installed capacity in China.
"The construction of the park has provided stable new energy and harvested unexpected fruits of ecological restoration and sustainable development for the husbandry industry," said An Fengjun, deputy director of the management committee of Hainan green industrial development park.
The clean and renewable energy delivered every year through the line is equivalent to replacing 18 million tonnes of raw coal, reducing 29.6 million tonnes of carbon dioxide that is equivalent to adding more than 80,000 hectares of forest. Enditem
(Xinhua reporters Xie Tongqiang and Geng Huihuang also contributed to the story)

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