基于锂电池充放电状态的混合储能系统控制策略设计

摘要

针对不同储能技术的特点,采用适合大规模使用的混合储能交流应用模式系统结构及控制方式,通过高通滤波控制将混合储能系统功率指令在各储能元件之间合理分配,提出基于锂电池充放电状态的超级电容状态调整方法以优化系统整体调节能力,就储能元件之间的过充过放保护和最大功率限制保护的协调控制进行详细讨论.通过PSCAD仿真算例分析验证了控制策略的有效性.%In view of the technical characteristics of different energy storage technologies, a system structure and control mode of hybrid energy storage system (HESS) for AC application suitable for large-scale application is adopted. The high-pass filter is used for HESS to rationally distribute power instructions between two energy storages. To optimize the system integral adjustment ability, a strategy of supercapacitor condition adjustment is proposed based on the charging/discharging status of lithium-ion battery. The coordination control of over-charge protection, over-discharge protection and maximum power limit protection between two energy storages are discussed in detail. The results of PSCAD simulation examples show the effectiveness of the proposed method.