Under the background of accelerating the construction of new power systems, the grid-type energy storage technology is moving from “auxiliary support” to “main power grid”, creating a true “stable base” for the new power system “. On April 1, Kehua Digital Energy delivered a keynote speech on “Practice Sharing of Kehua Digital Energy Network Energy Storage” at the ESIE Summit sub-forum. With hard-core technology, benchmarking projects and full-scene capabilities, Kehua Digital Energy presented the core value and development path of network energy storage for the industry, which attracted wide attention from the whole audience.
networked energy storage has the unique ability of “active network construction, independent support and global stability”, and can actively construct voltage and frequency reference in power grid fluctuation, providing inertia and damping response similar to synchronous generators, so as to realize the transition from “passive follow” to “active support”, has become the core solution to solve the stable pain point of the new power system and the inevitable choice in the era of high penetration of new energy.
identify true and false network: kehua number can give hard core standard
facing the chaos of “false network” in the market, kehua number can put forward four hard core standards of true network:
● active power support: provide equivalent inertia and quickly stabilize frequency fluctuation;
● reactive power support: it has 3 times the current, strong excitation capability lasting for 10 seconds, and actively stabilizes the voltage;
● Hardware confidence: high overload IGBT devices are adopted and sufficient energy is matched with DC side to ensure no inertia loss under full load conditions;
● software soul: VSG virtual synchronous machine algorithm is adopted, accurately reproduce the electromechanical transient characteristics of synchronous generators.
Kehua Digital can adhere to the “hardware and software” two-wheel drive, and each network construction capability can withstand the actual measurement and standard inspection. From technological innovation to benchmarking projects, from high-pressure measurement to the world’s largest landing, Kehua Digital Energy is leading the development of the “real network” of the energy storage industry with its full chain of independent and controllable strength.
Leading core technology: a comprehensive breakthrough from theory to engineering
In terms of key technologies, Kehua Digital can simulate the operating characteristics of synchronous generators through VSG algorithm optimization, and actively provide inertia support, frequency adjustment and voltage support for the power grid; the grid energy storage converter provides fault ride-through, black start and active and reactive power stability functions. While stably supporting 3 times overload operation, it has the “instantaneous response” capability of millisecond power response and microsecond voltage construction. The fault recovery time is reduced to less than 100ms, the short-circuit capacity can be as low as 1.015, and is suitable for various complex power grid scenarios.
At the hardware capability level, Kehua Digital has completed the 35kV field short-circuit test on the high-voltage side, which has fully verified the core performance of short-circuit current, voltage support, inertia response, etc., marking that its network construction technology has moved from theory to engineering and has the safety and reliability of large-scale application.
at the product application level, kehua digital energy has developed an independent and complete network construction algorithm, and introduced a variety of safe and reliable network-type energy storage converter products such as 1.25MW, 2.5MW, 3.5MW, 5MW, etc. to create a full stack solution for network-type energy storage systems. At the same time, Kehua can create a number of industry leaders: the first to complete the full certification of 15 structural network indexes of the Chinese Academy of Electrical Sciences; The first system-wide liquid cooling, the whole station top wind design, to solve the heat island effect problem; The first batch won the “Guardian” product certification of the network-type energy storage converter of the China Quality Certification Center.
benchmarking projects have landed one after another: gigawatt-level project delivery leads the industry
kehua digital energy network energy storage technology has taken root in many places around the world, and has set a record for gigawatt-level large-scale delivery of industry benchmarking projects.
the 1GW/4GWh grid-type energy storage project in arong banner, inner Mongolia, as the largest grid-type energy storage project in China, has realized the demonstration of GW-level grid-type energy storage technology. Xinjiang Kezhou 300MW/1200MWh grid-type energy storage project, as the world’s largest single grid-type energy storage project in 2024, has passed 1000 working condition tests and become a typical case of innovation and application in electrochemical energy storage industry.
For many years, Kehua has been able to hold the first place in the domestic PCS market share, with network-type energy storage shipments exceeding 8GW, covering major new energy bases in the country, technical strength and market position to obtain double certification.
For new power systems, grid-type energy storage is a must-answer question. Kehua Digital Energy continues to lead the iteration and large-scale application of grid-type energy storage technology with real technology, real products and real projects, helping to efficiently eliminate new energy, ensure the safety and stability of the power grid, and inject strong kinetic energy into the dual-carbon target!
