中文摘要：

大规模风电接入电网后,风电功率固有的不确定性可能会显著增大系统的运行风险。该运行风险可用失负荷概率来衡量。文中将电池储能系统接入风电场,并利用其灵活的充放电能力来降低系统的运行风险。为充分利用昂贵的电池储能装置,设计了专门的电池运行策略,任何不完整的充放电循环在电池运行过程中均被严格禁止。考虑到电池运行的时序性,采用序贯蒙特卡洛模拟技术评估系统的运行风险。基于某算例系统的仿真试验证实了所提出的技术方案及电池运行策略的可行性。此外,仿真结果亦表明,电池用于降低系统运行风险的循环寿命消耗非常低,也就是说,电池储能系统在降低系统运行风险的同时仍有能力实现其他功能。

英文摘要：

The uncertainties of the integrated wind power consequently increase the operation risk of power systems measured by the index of loss of load probability（LOLP）.The battery energy storage system（BESS）is incorporated into wind farms as another kind of reserve for reducing the operation risk of power systems.A special operation strategy is designed for BESS and any incomplete charge-discharge cycle is avoided.The charge/discharge sequences of BESS are chronological,so the sequential Monte Carlo simulation（SMCS）is adopted to assess the operation risk.Simulation results on a case system demonstrate that BESS can reduce the operation risk.In addition,another significant finding is that the charge-discharge cycle consumed for the operation risk reduction is tiny compared with BESS circle life.Thus,BESS still has the capability of achieving other purposes simultaneously.