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针对电池—超级电容器构成的混合储能系统(HESS),提出了一种基于低通滤波原理的HESS控制策略。基于滑动平均值原理确定电池参考输出功率,以实现电池对风电功率趋势性波动分量的控制,而超级电容器用以平抑风电功率中的快变波动分量;通过评估电池充放电状态,构建了内蕴运行寿命测算的HESS控制策略性能评价方法。基于某风电场实际运行数据,仿真分析了低通滤波截止频率、滑动平均值时间尺度等对HESS中电池运行寿命的影响,并给出了相应控制参数的参考值以延长电池运行寿命。研究结果对HESS的工程应用具有理论指导作用。
Aiming at the hybrid energy storage system composed of battery and supercapacitor (HESS), a HESS control strategy based on low-pass filter is proposed. Based on the principle of sliding average, the reference output power of the battery is determined to control the battery’s trend component of wind power while the supercapacitor is used to stabilize the fluctuating components of the wind power. By evaluating the state of battery charge and discharge, HESS control strategy performance evaluation method for running life estimation. Based on the actual operation data of a wind farm, the influence of the low-pass filter cut-off frequency and the moving average time scale on the service life of the battery in HESS is simulated and the corresponding control parameters are given to prolong the service life of the battery. The research results have theoretical guidance to the engineering application of HESS.