Recently, the 1.000 MW/4.000 MW grid-connected energy storage plant in Arong Banner, Inner Mongolia, for which Kehua Tech provided the alternating current (AC) solution, was officially connected to the grid after full load testing with three load and three discharge cycles.
According to the company, this project represents a significant advancement for Kehua Tech's grid-connection technology, moving from 100 MW projects to GW projects, and also indicates that the construction of the new power system in eastern Inner Mongolia has entered a high-quality development phase.
As the AC solutions provider for the project, Kehua Tech supplied an integrated, centralized, grid-connected 5 MW PCS (Power Control by Converters) solution.
This solution integrates the design of converters and step-up converters, seeking to significantly simplify the installation, commissioning, and on-site maintenance processes, as well as reduce overall system costs.
The supplier states that this product meets the requirements of grid-tied energy storage standards, allowing for power compensation and voltage and frequency control. In addition, it features grid connection/adaptation capabilities, enabling smooth switching without the need for external coordination.
The system also has a Black Start function. In extreme cases of total grid collapse, the system can act as an independent "start-up power source," first establishing a stable microgrid in voltage and frequency, gradually restoring other power sources and loads, thus achieving autonomous self-recovery of the electrical grid system and grid support.
The product has a high IP65 protection rating, allowing it to be adapted to harsh environments. The flexible modular design facilitates quick fault location, reduces maintenance time, and improves overall availability.
The fan's reverse self-cleaning function and the top exhaust cooling system prevent dust buildup, ensure heat dissipation, and mitigate the heat island effect in large energy storage facilities, reducing costs and the frequency of manual maintenance.
According to Kehua, the project has generated significant benefits since its commissioning, increasing the rate of wind and solar energy absorption in the surrounding area by 6%, absorbing more than 1,2 billion kilowatt-hours of clean energy annually, and reducing the waste rate of new energy sources (solar and wind) by approximately 6%.
Simultaneously, it exports 1,032 billion kilowatt-hours of green electricity annually, reducing conventional coal consumption by 300.000 tons and raising the grid voltage qualification rate to over 99,9%, with a power supply reliability rate of 99,99%.
This not only accelerates the efficient uptake of clean energy in eastern Inner Mongolia, but also contributes to the transformation of the region's energy matrix towards a low-carbon economy, boosting green and low-carbon development in Inner Mongolia and the entire country, demonstrating Kehua Digital Energy's technological leadership and sense of responsibility in building new energy systems.
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