At 18:21 on November 26, with the completion of 168 hour trial operation of No. 3 condenser of Zhuyu 330kV collection station, the first batch of 16 sets of 50 Mvar distributed condenser projects of 4.05 million KW supporting power supply points for phase I of 'Qingyu DC' UHV project, which was constructed by the State Power Investment Group Yellow River Upstream Hydropower Development Co., Ltd., were all connected to the grid and put into operation, with excellent indicators, It marks the formal formation of the world's largest new energy distributed condenser group, which will effectively ensure that the 'Qingyu DC' project has 4 million kW power transmission capacity and help China achieve the '3060' carbon peak and carbon neutralization goals.
With the adjustment of national energy structure and the acceleration of clean energy transformation, UHV DC transmission has become an important carrier to realize the cross regional transmission of clean energy such as water, wind and light. In September 2020, Huanghe company completed the 4.05 million KW 'Qingyu DC' project supporting power supply project with the largest one-time operation scale and the shortest construction time in the world, accounting for 81% of the 5 million KW supporting power supply project. The problems of randomness, intermittence and fluctuation in new energy power generation, coupled with the small installed scale of conventional power supply and relatively weak voltage support capacity in Qinghai Hainan Tibetan Autonomous Prefecture, seriously restrict the normal 'power' of new energy power stations. Therefore, Huanghe company explores the practice of large-scale installation of distributed condenser on the power side for the first time in the world, which will effectively solve the voltage stability problems caused by cross regional DC transmission and large-scale access of new energy to the power grid, and is of great significance to accelerate the transformation and development of energy.
The new energy distributed condenser has the advantages of simple system, high integration and good regulation performance, which will greatly improve the new energy transmission capacity of the important channel of 'west to East power transmission', and can be used as a reference and demonstration for the large-scale centralized development of new energy. At the same time, without project reference standards, the Yellow River company, together with the State Grid Corporation of China, the design institute and equipment manufacturers, repeatedly conducted technical exchanges and scheme discussions, conducted full cycle and multi angle research from equipment selection, configuration scheme and later operation and maintenance, and explored industry representative and guiding schemes and construction processes, filling the domestic gap.
It is understood that there are a total of 21 distributed dimmers. After all of them are put into operation, it is expected to increase the new energy power generation capacity of 3.15 million kW in Qinghai and Hainan, and increase the annual new energy power generation by 7.02 billion kwh, which is equivalent to reducing 3.189 million tons of coal and 5.742 million tons of carbon dioxide. The economic and environmental benefits are significant.