基于瞬时功率镜像补偿的斜坡式重力储能系统功率平滑控制策略

针对重力储能系统因离散质量块切换引起的输出功率波动问题，提出了一种基于瞬时功率镜像补偿的功率平滑控制策略。首先介绍了斜坡式重力储能系统的工作原理，分析引起系统功率波动的原因；然后设计了抑制功率波动的系统结构以及功率平滑控制策略，并以11 kW的斜坡式重力储能系统为例，对系统结构参数进行理论计算；最后构建斜坡式重力储能系统仿真模型，分析了系统在质量块交替过程中的暂态波动特性。结果表明，应用所提方法，质量块在交替过程中可提供连续稳定的机械功率，较好地平滑重力储能系统的输出功率，验证了该方法的有效性。

Power Smoothing Control Strategy for Slope Gravity Energy Storage System Based on Instantaneous Power Mirror Compensation

To solve the problem of output power fluctuation in gravity energy storage systems due to discrete mass block switching, a power smoothing control strategy based on instantaneous power mirror compensation is proposed. Firstly, the working principle of the slope gravity energy storage system is introduced to analyze the causes of power fluctuation of the system. Secondly, the system structure for suppressing power fluctuation as well as the power smoothing control strategy are designed, and the theoretical calculation of the system structure parameters is carried out by taking the example of a 11 kW slope gravity energy storage system. Finally, a simulation model for slope gravity energy storage system is established, and the transient fluctuation characteristics of the system during the mass block alternation process are analyzed. The results show that by applying the proposed method, the mass block can provide continuous and stable mechanical power during the alternating process, which can better smooth the output power of the gravity energy storage system, verifies the effectiveness of the method.