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in the past ten years, the photovoltaic and wind power industries have developed rapidly, and there is still more room for development in the future. according to the cop28 plan, by 2030, the installed capacity of renewable energy will triple that of 2022, exceeding 11,000 gw. with the rapid development of new energy, the power systems of various countries have entered a stage of high penetration of renewable energy. the proportion of new energy continues to increase, the power system is rapidly consuming resources to flexibly adjust, and power system balance and safety issues are becoming more prominent, posing challenges to the stable operation of the power grid. this has become a difficult problem for the development of new energy around the world.networking technology is a key technology to improve the ability to actively support new energy. countries are vigorously promoting development and application in commercial projects from the aspects of technical standards, policies, etc.。

▲hou jinlong, director of huawei and president of huawei digital energy

huawei continues to invest in research on the safety and stability of new energy grid integration to support industry development.

since 2011, huawei has been intensively investing in research on the safety and stability of new energy grid connections, and has continuously promoted the development of grid-friendly technologies from "following the grid" and "supporting the grid" to "enhancing the grid". applied to several scenarios and projects.in the middle east, the first phase of 400mw photovoltaic and 1.3gwh energy storage systems in the red sea new city in saudi arabia all adopt huawei's intelligent string network energy storage solutions. they will be fully operational from september 2023, providing more than 1 billion kilowatt hours of green power. it is the world's first urban microgrid powered by 100% renewable energy. the project has been running safely and stably for one year, and has fully verified key network technologies in terms of 1,000 pcs synchronous network construction, minute-level power recovery, resistance to 100% transformer switching impact, and off-grid zero-voltage fault ride-through. the network construction technology accumulated in the red sea new city project is being promoted and applied to micro-grid scenarios such as mines and islands. using photovoltaic, wind and storage integrated network technology to build a mine microgrid not only greatly improves power supply reliability, but also reduces electricity costs by more than 50%. currently, more than 10 mines and island microgrids have been delivered in africa, latin america and other places. in the future, network-based microgrid technology will be applied to more places around the world, helping local areas eliminate the power gap.

join forces with power grids and power generation companies to jointly promote network-based energy storage demonstrations

in the country,huawei has joined forces with power grids and power generation companies to jointly promote the demonstration of network-based energy storage projects. it has carried out multi-scenario and multi-working-condition demonstration tests of network-based energy storage on five projects in qinghai and other places. in terms of the comprehensiveness of project testing , scale, test performance indicators and other aspects have achieved satisfactory results.. comprehensive testing has been carried out in all scenarios including unit level, power station level, regional power grid simulation and off-grid, and more than 2,300 test items have been completed on key indicators of network construction technology. at the china resources power wind power station in hami, which is at the transmission end of the dc uhv line, a 100mwh wind power station grid-type energy storage project was built and a comprehensive and systematic grid technology test was carried out. china green development's multi-energy complementary 100 mwh grid-based energy storage power station in golmud, qinghai, passed the 35kv and 110kv artificial short-circuit tests at one time. the results showed that 600 pcss were zero off-grid and quickly output 3 times the apparent current and 2.8 times the apparent current within 10 ms. times the asymmetric current, effectively supporting the grid voltage. at the alizang open investment photovoltaic power station, a 24mwh grid-type energy storage power station was built in a high-altitude, extremely weak power grid environment. it passed the 35kv artificial short-circuit test at one time, achieving zero pcs off-grid, and quickly outputting 3 times the apparent current within 10ms. , supporting smooth power without fluctuations and no recovery overvoltage.

▲hami china resources power wind power station

through four aspects: multi-field station-level self-synchronized amplitude and frequency modulation technology, broadband self-stabilization and stabilization control technology, new intelligent string energy storage two-stage conversion architecture, network-type energy storage power modules and control chips, etc. a systematic test was conducted on huawei's intelligent string network energy storage technology, thereby verifying its supporting role in the power system in multiple scenarios with a high proportion of new energy.in july 2024, at the technical appraisal meeting on "key technologies and applications of intelligent string network energy storage systems suitable for high-proportion new energy multiple scenarios" organized by the chinese society of electrical engineering, representatives from the chinese academy of sciences and the chinese academy of engineering the appraisal expert committee composed of several senior academicians and more than a dozen experts from the state grid and other units agreed that the projects applying for technical appraisal are aimed at improving the stability of new power systems and the grid-connected consumption of new energy in the context of a high proportion of new energy. engineering applications have been realized. the project as a whole is at an internationally leading level.

the multi-scenario promotion value of network technology and thoughts and suggestions on the high-quality development of the network energy storage industry

as an innovative technology based on power electronics and digitalization, network construction technology can effectively improve the stability of the power system during the construction of new power systems and has multi-scenario promotion value:

on the power generation side, for clean energy bases, the centralized access scenario of new energy in weak grid areas can greatly improve the active support capabilities of new energy stations and achieve a higher proportion of new energy grid integration.

on the power grid side, for scenarios such as the receiving end of uhv lines and the hollow area of ​​the load center power supply, the system's flexible adjustment and reliable operation capabilities can be enhanced.

on the power consumption side, 100% new energy regional power grids and off-grid power supply can be achieved for source, grid, load storage and microgrid power supply areas at the end of the power grid, as well as on plateaus, mines, and islands.

in order to promote the high-quality development of the network-based energy storage industry and allow innovative elements to play a greater role in promoting the industry, hou jinlong, director of huawei and president of huawei digital energy, put forward thoughts and suggestions in three aspects, including gradually expanding network-based energy storage the scale of application has matured and improved in application; a high-quality standard system for network-based energy storage has been established; and a market mechanism conducive to the high-quality development of network-based energy storage has been formed.looking to the future, huawei digital energy will continue to integrate 4t technologies such as bit (digital technology), watt (power electronics technology), heat (thermal management technology), and battery (energy storage management technology) to provide high-quality, high-security, and high-reliability solutions. key equipment, work with customers and partners to actively promote the high-quality development of the network-based energy storage industry, and contribute huawei's strength to the construction and development of new power systems and new energy systems!