The energy artery of "West-to-East Power Transmission" has its fifth "physical examination"

China Energy Storage Network News: On April 30, the fifth annual "physical examination" of the ±800 kV Qilian Converter Station, the country's first new energy UHV sending-end converter station, officially kicked off since its commissioning, heralding the official launch of the "one station and one line" maintenance work of the Qi Shao DC, contributing to the comprehensive promotion of energy security supply and green and low-carbon transformation.

The ±800 kV Qilian Converter Station is the only UHV converter station in Gansu Province. It is also a major strategic measure taken by the State Grid Corporation of China to promote the transmission of wind power bases in the western region, expand the scale of "west-to-east power transmission", and meet the upgrading of Gansu's energy industry. Since its commissioning in 2017, it has transmitted more than 99 billion kWh of electricity and reduced carbon dioxide emissions by 75.22 million tons, helping to implement the "dual carbon" goals with practical actions.

This annual comprehensive maintenance plan will be carried out from April 30 to May 11, with 32 units and a total of more than 680 people participating in the inspection. What is different from the past is that in order to improve the annual reliability index, this annual inspection will use the method of powering off DC equipment and some AC equipment to carry out annual maintenance, hidden danger control, and fire protection improvement work.

It is reported that by the end of April 2022, the installed capacity of new energy in Gansu Power Grid reached 29.76 million kilowatts, accounting for 47.5% of the total installed capacity, which is a typical power grid with a high proportion of new energy. As the main artery of my country's "West-to-East Power Transmission", the ±800 kV Qishao DC can bundle and transmit large-scale wind power, photovoltaic power and other new energy in Gansu with thermal power, thus improving the utilization level of new energy.