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Energy Storage Project of China Southern Power

The Shenzhen Baoqing Power Plant Project of China Southern Power Grid Company Limited is the domestic first battery energy storage station of the megawatt level. It is located in Longgang District of Shenzhen. It is an industrial energy storage system for the distribution network, with 10 kV voltage grade, 2 MVA rated power and 2 MWh energy storage system. Such battery energy storage station can achieve peak load shifting on the side of the distribution network to reduce the load peak and off-peak difference on the grid and improve the asset utilization rate of the power transmission and transformation equipment. Besides, it also has auxiliary functions, such as system backup, independent power supply, reactive compensation and other application modes.
As the developer of the power conversion system (PCS) technology for this project, Zhiguang has initiated the PCS technology of the large-capacity 3-phase H-bridge cascaded energy storage system with direct transformer-free connection to the HV grid. Such PCS system is the fast and efficient power conversion system with the world's maximum power and output voltage. It has broken through technological difficulties in the large-sized multi-stage battery packs for the large-capacity battery energy storage system. It has also improved the consistency of the multi-stage battery series-parallel connection and the parallel operation efficiency of the energy storage system by over 2%. This project has overcome key technological difficulties in large-capacity battery energy storage stations. Its result represents a significant innovation in the field of large-capacity battery energy storage. It can provide technological support for the design, construction and operation of large-capacity battery energy storage stations. It also plays an important role in promoting the development of smart grids, scaled consumption of new energy, and energy structure optimization in China. It has a significant prospect in terms of economy, society and popularized application. It is up to the international leading level with respect to energy conversion and battery balance control technology. Furthermore, it was listed in the "Top 10 Excellent Cases in Chinese Smart Energy Sector in 2015".

 

Energy Storage Project of China Southern Power

    

Energy Storage Project of China Southern Power

    

Energy Storage Project of China Southern Power


 

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