基于二阶滤波的双参数储能系统控制器设计方法研究

Research on controller design method of two-parameter energy storage system based on second-order filtering

中文关键词: 光伏功率波动  储能系统控制器  相位延迟  二阶滤波

英文关键词: photovoltaic power fluctuation  energy storage system controller  phase delay  second-order filter

中文摘要:

      平抑光伏波动场景下,为了减小储能系统（energy storage system,ESS）控制过程中存在的相位滞后,提出一种基于二阶滤波的ESS控制器。分析传统平滑控制采用低通滤波器存在的相位延迟特性对ESS容量的影响,相位延迟越大,ESS容量需求越大。为消除该影响,理论分析满足消除相位延迟的控制器最低阶数为二阶,并推导出基于二阶滤波的ESS控制器,提出控制参数设计方法,以有效减小平滑控制过程中的相位延迟,最小化ESS容量需求。该控制器设计简单,仅含有两个控制参数,能够推广于实际工程。最后,采用某5 MW光伏电站功率数据验证了所提出ESS控制器的有效性和优越性。

英文摘要:

      To reduce the phase lag existing in the control process of energy storage system（ESS）in the photovoltaic fluctuate suppression scenario, an innovative ESS controller based on second-order filtering is proposed. The effect of the phase delay characteristic of the traditional smoothing filter on the ESS capacity is analyzed. The larger the phase delay is, the greater the ESS capacity demand is. In order to eliminate this effect, the lowest order of the controller that can eliminate phase delay is the second order, and an ESS controller based on the second order filter is derived, and the control parameter design method is proposed to effectively reduce the phase delay in the smooth control process and minimize the ESS capacity requirements. The controller is simple in design and contains only two control parameters,which can be applied to practical projects. Finally, the power data of a 5MW photovoltaic power station are used to verify the effectiveness and superiority of the proposed ESS controller.