In February, the Beijing Winter Olympic Games will arrive as scheduled, and all preliminary preparations will be concluded one after another. Recently, the first batch of units (No. 1 and No. 10) of Hebei Fengning pumped storage power station were officially put into operation for power generation, which will ensure 100% green power supply for the Beijing Winter Olympic Games. The power station is designed and constructed by Power Construction Corporation Of China Ltd(Powerchina Ltd)(601669) and operated by State Grid Xinyuan company of State Grid.
As a key green energy project supporting the 2022 Beijing Winter Olympic Games, Fengning pumped storage power station is equipped with 12 generator sets with a single unit capacity of 300000 kW, with a total installed capacity of 3.6 million KW. It is developed in two phases, 1.8 million kW in phase I and 1.8 million kW in phase II. It is known as the world's largest "charging treasure" and "Encyclopedia" in the field of pumped storage power stations. It is reported that Fengning pumped storage power station has four firsts in the field of pumped storage power stations in the world.
create "four firsts"
The relevant person in charge introduced to the reporter of Shanghai Securities News that the construction of Fengning pumped storage power station has created four firsts in the field of pumped storage power stations in the world:
the installed capacity ranks first in the world. the power station is equipped with 12 300000 kW single-stage reversible pump turbine generator sets, with a total installed capacity of 3.6 million KW, which is the largest pumped storage power station in the world. Among them, the upper reservoir regulation capacity is 40.54 million m3 and the lower reservoir regulation capacity is 45.13 million m3.
energy storage capacity ranks first in the world. Fengning pumped storage power station is known as the world's largest "charging treasure", which can be described as the "great power and heavy weapon" in the energy field. The full utilization hours of 12 units reach 10.8 hours, and the maximum energy storage at one time is nearly 40 million kWh (equivalent to the three-day power generation of wind power and photovoltaic entering Zhangbei flexible direct power grid); It is estimated that the annual power generation can reach 6.288 billion kwh. It is the only pumping and storage power station with weekly regulation performance in North China.
the scale of underground powerhouse ranks first in the world. the underground powerhouse of the power station is 414m in total length, 54.5m in height and 25m in span. It is the largest pumped storage underground powerhouse at present; The main transformer tunnel is 450.5m long, 21m wide and 22.5m high. The excavation volume of the two caverns can accommodate 13 Taihe halls (the largest palace of the Forbidden City).
the scale of underground cavern group ranks first in the world. the underground engineering geological conditions of the power station are complex, with up to 190 underground caverns, with a total length of 50.14 kilometers and a large scale. The underground cavern group composed of underground powerhouse and main transformer tunnel has the largest scale in the world.
"The construction of the power station provides technical support and engineering demonstration for the large-scale development and construction of pumping and storage in the future." Power Construction Corporation Of China Ltd(Powerchina Ltd)(601669) the relevant person in charge said that Fengning power station systematically conquered the key technology of the construction of super large underground caverns under complex geological conditions for the first time.
escort the green winter Olympics
The commissioning of Fengning pumped storage power station will provide a strong guarantee for the realization of all green power supply for the Beijing Winter Olympic Games. It is reported that after all units of the power station are put into operation, the double regulation capacity is as high as 7.2 million KW, equivalent to 1 / 3 of Beijing Tianjin Tangshan power grid; It can save 480000 T / a of standard coal and 1.2 million T / a of carbon dioxide.
"Fengning power station can ensure the 'full coverage' of green power in Winter Olympic venues." According to the relevant person in charge, the power station is located in Fengning County, Chengde City, Hebei Province, close to Beijing, Zhangjiakou and other cities. The power station is connected to Zhangbei flexible direct power grid and North China 500 kV power grid, which can provide green power for the Winter Olympic venues at any time, significantly promote the extensive use of green energy in the Winter Olympic host cities, and provide continuous Dynagreen Environmental Protection Group Co.Ltd(601330) for the coordinated development of Beijing, Tianjin and Hebei.
Then, will the icing of the power station reservoir affect the normal operation?
Insiders said there was no need to worry. The power station shall ensure a certain unit operation time and startup and shutdown times every day; During normal operation, the ice in the reservoir will change with the rise and fall of water level, which will not affect the normal operation of the power station. In addition, pumped storage power stations have been put into practice in places with lower temperature in winter, such as Dunhua, Jilin Province and Huanggou, Heilongjiang Province, and the technology is relatively mature.
Pumped storage has "six functions" in power system, such as peak shaving, frequency modulation, phase modulation, energy storage, system standby and black start. It is the most mature, reliable, safe and large-scale energy storage technology at present. The generated electricity cannot be stored, and the 24-hour supply of clean energy can be realized through the adjustment of energy storage technology.
Characteristics of pumped storage power station (source: power grid headline microblog)
"It is expected that energy storage will become the fourth basic element of the new power system." Citic Securities Company Limited(600030) according to the analysis, the large-scale access of new energy is promoting the change of the whole power system from "source network load" to "source network load storage". At present, energy storage is mainly concentrated in two forms: pumped storage and lithium-ion battery energy storage. By the end of 2021, the installed capacity of pumped storage still occupies the main position in the cumulative installed capacity of global energy storage, accounting for more than 90%.
