“双碳”背景下新能源并网储能容量优化配置方法

Energy Storage Capacity Optimization Allocation Methods for Grid-Connected New Energy under Dual-Carbon Background

为改善新能源并网储能容量配置输出功率与荷电状态波动大、蓄电池使用寿命短的问题,基于“双碳”背景,提出了一种新能源并网储能容量优化配置方法。选取新能源典型历史样本作为出力样本,计算全数据样本周期中每个连续时间周期的功率波动率;根据功率波动情况,通过平滑处理的方式,得到蓄电池和超级电容的输出功率参考值;利用超前控制方法改进传统储能控制,通过维持当前状态、提前放电、提前充电3种方式,合理把控储能容量,并在保证平抑波动效果的基础上优化储能成本;从功率和成本两个角度,完成对新能源并网储能容量的优化配置。实验结果表明:该方法能够稳定输出功率和荷电状态、延长蓄电池使用寿命。说明该方法有效实现了设计预期。

To address large fluctuations in output power and state of charge,as well as short battery life of energy storage capacity in the configuration of grid-connected new energy,an optimized configuration method for energy storage capacity configuration is proposed based on the"dual carbon"background in this paper.First,the typical historical sample is selected as the output sample,and the power fluctuation rate of each continuous time period in the full data sample period is calculated.Second,according to the power fluctuation,the output power reference values of batteries and super capacitors are obtained by smoothing.The traditional energy storage control is improved by using the advance control method.The energy storage capacity is reasonably controlled by maintaining the current state,discharging and charging in advance,and the energy storage cost is optimized on the basis of ensuring the effect of stabilizing fluctuations.The allocation of storage capacity of grid-connected new energy is optimized from both perspectives of power and cost.The experimental results show that the proposed method can stabilize the output power and state of charge and prolong the service life of the battery,indicating that the method can effectively meet the design expectation.