Kehua Data announced on the evening of January 30 that Xiamen Kehua Digital Energy Technology, a wholly-owned subsidiary of Kehua Data Co., Ltd., recently received the "Notice of Selection" issued by the International Bidding for Winning the Bid, which was evaluated by the evaluation teamKehua Digital Energy is the selected person for the "Kezhou Independent Energy Storage EPC EPC General Contracting Project Energy Storage Unit Procurement Subcontracting 01: Energy Storage Unit".
The specific situation of the project is as follows: 1. Project name: Kezhou independent energy storage EPC general contracting project energy storage unit procurement subcontracting 01: energy storage unit;2. Tenderee: Northwest Electric Power Design Institute of China Electric Power Engineering Consulting Group ***3, project amount: The estimated transaction amount is RMB 12004.8 billion yuan (subject to the signing of the contract). According to the previous tender announcement of the project, the total capacity of the project is 300,000 kilowatts and 1.2 million kilowatt-hours grid-based electrochemical energy storage power station.
Coincidentally, recently, the world's first offshore grid-based energy storage project built by CNOOC - Weizhou Island 5MW 10MWh energy storage power station was successfully put into operation, with the help of Sungrow's grid-based energy storage technology, the above problems have been solved, and China's first source-grid-load-storage integration, multi-energy complementary offshore oilfield group smart power system has been created
Source: Sunshine Optical Storage and ChargingSo, what is grid-based energy storage?Grid-based energy storage is a cutting-edge technology, which can automatically adjust the amount of electricity according to the demand of the power grid, and will not cause a large impact on the power grid. Its core is to build a voltage source that supports the stable operation of the large power grid through the energy storage inverter, which can quickly modulate frequency and voltage, increase inertia and short-circuit capacity support, and suppress broadband oscillation. At present, the United States, Australia, China and other countries are actively promoting the research and development and demonstration application of related technologies.
Different from traditional grid-based energy storage, grid-based energy storage can actively identify the situation of the power grid and more finely and actively stabilize the fluctuation of the power grid. At present, Xinjiang, Liaoning, Qinghai and other places have put forward the requirements for proportional and mandatory distribution of grid-based energy storage projects or layout-based grid-based energy storage projects. In December 2023, the 50,000 kilowatt photovoltaic + energy storage project in Tanglu, Nagqu Nima County, invested and constructed by SDIC ** New Energy Company, achieved full-capacity grid-connected power generation. The project adopts the latest grid-building energy storage technology, which can realize the joint control and autonomous regulation of the transient steady-state of energy storage on the grid side, and has the transient overload capacity of 3 times 10s and the ability to independently support the stability of the regional power grid.
On July 24, 2023, the "Notice on Actively Promoting the Pilot Demonstration Application of the ** Power System Grid-based Energy Storage Project" was issued, proposing to actively promote the pilot demonstration application of grid-based energy storage projects, and encourage the pilot trial in Ali Prefecture, Nagqu City, Shigatse City, Lhasa City and other regions.
So which leading companies love grid-based energy storage technology?
Due to the high technical barriers in the network-building technology track, there are not many players, and the domestic enterprises are mainly represented by Sungrow, NARI Jibao, Envision Energy, Kehua Digital Energy and other enterprises.
Xu Qingqing, vice president of Sungrow Solar Storage Group and president of the energy storage division, said that Sungrow started early in the field of network-building technology. Around 2016, it has used related technologies in foreign application scenarios such as black start, weak network, and microgrid. At present, the company is one of the few companies in the Australian industrial and commercial energy storage and virtual power plant market that can meet the local grid-connected standards.
At present, network construction technology is in the early stage of development. However, facing the high proportion of new energy access in the future, the in-depth cooperation of multiple entities on the power generation side, the grid side, and the user side, and the new ecology of the coordinated development of "source-grid-load-storage", the network construction technology is an important boost for the construction of high-quality power grids. Sungrow's "stem cell grid technology", including frequency and voltage regulation, inertia support, black start and other network construction technologies, will continue to help the development of clean and efficient new power systems.