China's first set of 750 kv cross-platform was successfully installed in a 750 kv substation in haixi, qinghai province, September 22, 2008.This has not only enabled the technology to apply the technology to 750 kv, but also provided technical support to solve the problem of large-scale photovoltaic power generation in haixi area.
Since the 12th five-year plan, the installed capacity of the photovoltaic power station in qinghai has grown at a rate of 1 million kilowatts per year, with an average annual growth rate of 58%.With the advantaged energy resources, haixi area is the preferred area of pv grid.At present, the photovoltaic grid in haixi area is mainly realized through the second channel of the network of 750-kilo-volt xinjiang and northwest main network.
According to kangjun, the project leader of guodian qinghai electric co., the technology is an effective means to ensure the safety, stability and optimization of power grid.In early 2016, the institute in conjunction with the domestic many scientific research, consultancy, research, through the existing long-distance network by adding 40% of series compensation device on the second channel, second channel transmission capacity can be increased from 2.6 million kw to 4.3 million kw, thus effectively improve the hercynian power supply stability and reliability of the power grid and the northwest, improve the ability of qinghai new energy given.
"The 750-kilovolt tandem platform is installed in the construction experience which is not yet available in China. There are many difficulties such as high technical requirements and complex data calculation."Of electricity transmission &transformation facilities of qinghai 闫勇 construction project department manager in the company told reporters that since enter the site equipment installation in June, in order to ensure accurate installation process, the company carefully compiled the special construction scheme, through independent research and development in the process of the application to install all the data for simulation calculation for many times, and using "system alignment method" in the installation, will be at the bottom of the platform and the ball socket of post insulator accurately docking, greatly shorten the adjusting time of the air and docking platform.
As hercynian to qinghai qinghai provids a key link in the process of transmission channel capacity promotion project, the installation of series compensation flat head 17 meters, 10 meters wide, 10 meters high, equipment 19 meters high to ground, a single platform about 95 tons, the total weight and series compensation platform like this there are 24 in the whole project of the communist party of China.The project is expected to be completed by October 2018.