Abstract
Battery energy storage system (BESS) is one of the effective technologies to deal with power fluctuation and intermittence resulting from grid integration of large renewable generations. In this paper, the system configuration of a China’s national renewable generation demonstration project combining a large-scale BESS with wind farm and photovoltaic (PV) power station, all coupled to a power transmission system, is introduced, and the key technologies including optimal control and management as well as operational status of this BESS are presented. Additionally, the technical benefits of such a large-scale BESS in dealing with power fluctuation and intermittence issues resulting from grid connection of large-scale renewable generation, and for improvement of operation characteristics of transmission grid, are discussed with relevant case studies.
Highlights
Renewable energy power generation has become an important part for China’s power supply
The system configuration of a national renewable generation demonstration project, combining a large-scale battery energy storage system (BESS) with wind farm and PV power station all coupled to a power transmission system, is introduced, and the key technologies and operational status of this BESS are presented
At the local control and monitoring system (CMS) layer, the power converter system (PCS), battery and distribution-system operational statuses are monitored in real-time, and the upper-layer control instructions are promptly send to each control PCS unit
Summary
Renewable energy power generation has become an important part for China’s power supply. The BESS of Japan Hokkaido wind farm incorporates a vanadium redox flow BESS with the power capacity 4 MW/6 MWh and is mainly for smoothing the wind power output fluctuations [18,19,20]. In Zhangbei, a large-scale BESS, which includes a 14 MW/63 MWh lithium-ion BESS and a 2 MW/8 MWh vanadium redox flow BESS, has been put into operation (flow BESS is still in the site commissioning stage) It is part of a national wind, PV, storage and transmission demonstration project. The system configuration of a national renewable generation demonstration project, combining a large-scale BESS with wind farm and PV power station all coupled to a power transmission system, is introduced, and the key technologies and operational status of this BESS are presented. The technical benefits of such a large-scale BESS in dealing with power fluctuation and intermittence issues resulting from grid connection of large-scale renewable generation, and for improvement of operation characteristics of transmission grid, are discussed with relevant case studies
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