Design and test of a new droop control algorithm for a SMES/battery hybrid energy storage system
Design and test of a new droop control algorithm for a SMES/battery hybrid energy storage system
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DOI：
10.1016/j.energy.2016.10.130
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发表时间：
2017
期刊：
影响因子：
9
通讯作者：
Jianwei Li;Qingqing Yang;F. Robinson;Feixia Liang;Min Zhang;W. Yuan
中科院分区：
文献类型：
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作者：
Jianwei Li;Qingqing Yang;F. Robinson;Feixia Liang;Min Zhang;W. Yuan
在可再生能源和波动的负载分布产生的功率扰动的存在下，高容量能量存储单元是维持电力系统稳定性所期望的。电池能量存储系统可用于平滑功率流，然而，所需的频繁的深度充电和放电循环显著降低了电池的使用寿命。提出了一种混合储能系统（HESS），该系统采用电池储能和超导磁储能（SMES）相结合的方式，在平滑潮流的同时缓解电池循环。提出了一种基于下垂控制的HESS功率共享控制方法。这能够控制充电/放电优先级，从而保护电池免受高功率需求和快速瞬态循环的影响。提出了一种电池和超导储能系统的定尺寸策略，克服了超尺寸问题。一个硬件实现是用来评估的控制和SMES规模的方法，为短时间尺度HESS操作。一个动态离网海浪能量转换系统进行了模拟，以评估性能的HESS在一个较长的时间尺度。电池寿命模型，考虑到电池的寿命周期和放电电流率是用来估计电池寿命延长。HESS设计实例的寿命增加了26%。
High capacity energy storage units are desirable to maintain power system stability in the presence of power disturbances produced by renewable energy sources and fluctuating load profiles. Battery energy storage systems may be used to smooth power flow, however, the frequent, deep charge and discharge cycling required dramatically reduces battery service life. A hybrid energy storage system (HESS) using battery energy storage with superconducting magnetic energy storage (SMES) is proposed to mitigate battery cycling while smoothing power flow. A HESS power sharing control method based on the novel use of droop control is proposed. This is able to control charge/discharge prioritization and hence protect the battery from high power demand and rapid transient cycling. A sizing strategy is proposed for the battery and SMES which overcomes the oversizing problem. A hardware implementation is used to assess the control and SMES sizing methods for short time scale HESS operation. A dynamic off-grid sea-wave energy conversion system is simulated to assess the performance of the HESS over a longer time scale. A battery lifetime model which takes into account both battery life cycles and discharge current rate is used to estimate battery lifetime extension. A lifetime increase of 26% is obtained for the HESS design example investigated.