介绍:
Early in the morning, at Wayo village in Qamdo prefecture, Tibet Autonomous Region, Changpa Tsering and his family rise. Before walking into the kitchen for breakfast, he turns on the TV to see what&`&s up inside the country and out, just as what those living in the big cities do every morning.
He could not do this until last November when the Sichuan-Tibet power grid, which is the highest power grid in the world, opened.
"The very first change in our lives is that every family in our village bought a TV, a fridge and a washing machine. Before last winter, we had insufficient electricity supply for the machines to run. The second important change is that the power helps me to set up and realize efficient management."
Chanpa Tsering has established 48 greenhouses to plant watermelon and vegetables. He calculates a bill: the watermelons&`& growing period is about 3 months. The net income of one greenhouse of watermelons is from 7 thousand to 8 thousand yuan, which is about 1 thousand and 2 hundred US dollars.
Ngawang Gyaltsen lives at Botuo village in the same county in Qamdo. He couldn&`&t agree more:
"After the power grid here connected with the Qamdo power station, my life has changed. Before the connection, there was power rationing. Now we can use power at any time. Actually I had a TV and other kinds of household appliances before, but barely used them. Now I can not only watch TV at home, but also use farm machines."
This is a key project to serve the economic and social development and social stability in China&`&s overall western development strategy.
The highest power grid in the world is longer than 1,500 kilometers, linking Qamdo in Tibet Autonomous Region and Garze Tibetan Autonomous Prefecture in Sichuan Province. It passes through two 500-KV transmission stations, two 200-KV stations, two counties in Garze Prefecture of Sichuan Province, and seven counties in Qamdo Prefecture of the Tibet Autonomous Region.
Zhang Yonghua is the deputy director of Qamdo Power Company. He says he cannot believe his team was able to finish their seemly mission impossible with so few hands, and even ahead of schedule.
"The power station began to run on November 20th, but the construction started from March 18th, can you imagine how we did this? Not only the power substation, but also over 1 thousand and 60 kilometers long power circuits and over 2 thousand and 70 power towers on the mountain were checked, examined and tested by our team. There were just 4 to 6 staff in my team."
It took over 20,000 construction workers eight months to complete the project, six months ahead of time. The project takes a global the lead in the construction of high altitude power transmission, since unimaginable difficulties had been overcome.
Located at the average altitude of more than 3 thousand and 8 hundred meters with the highest elevation of nearly 5 thousand meters,the power grid is built in natural disaster-prone areas with frequent landslides, mudslides or earthquakes. The areas along the power grid pass through high mountains, deep valleys and "no-man&`&s" land, which made it almost impossible to transport 100 thousand tons of building materials.
Zhang Yonghua was born in Hunan, he and his team members spent a really a long time to overcome the altitude sickness.
"At the very beginning, I suffered severe altitude sickness. I didn&`&t have strength to walk, we even planned to wrap up and go back home, because it&`&s too high to work. After a period of adaptation, we finally found that we could do our job. then we adapted the environment gradually."
Due to historical reason, the power grid in Qamdo was separate from that of other areas, which results in severe power shortages.
According to Nyima Dorje, Deputy Mayor of Qamdo city, before the connection, electricity in Qamdo was generated by small hydropower stations in the summer. The power supply was far from enough while there was no power at all in winter. After the local power grids linked with the Garzi, electricity can be transmitted to Qamdo from the Sichuan main power grid in dry season. He says:
"Actually, while in the summer wet season, there is also extra power generated in Qamdo. This excess power can also be sent back to the Sichuan grid. Now that the connection work is complete, we are rushing to send the electricity to every county, every village and every house. Let the ordinary farmers and herdsmen receive the support from the whole country."
In the same time, the project can also serve as a channel to transmit the power generated in the Tibetan-inhabited areas to other areas of the country thanks to the rich hydroelectric resources in Qamdo and Garze of Sichuan.
Now more power stations are being developed in the upper reaches of the Jinsha River and the Lancang River, which are expected to improve the structure of the power grids, transmit the clean hydro power to other areas in the country, accelerate the economic development in Qamdo, as well as to balance the environmental protection in the region.
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