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.
考虑储能系统的充放电特性,根据电力系统所需要提高供电可靠性,结合随机生产模拟中得到的等效负荷持续曲线,确定储能系统的额定充放电功率和容量,在随机生产模拟计算中,考虑了表征供电可靠性的两个指标:电力不足概率(Loss of Load Probability,LOLP)和电量不足期望值(Energy Expectation not Served,EENS)。采用负荷标准差与电费综合评价削峰填谷的效果,以这两个指标作为削峰填谷优化数学模型的目标函数。
