计及微电网储能系统寿命损耗的容量配置

Capacity Allocation of Energy Storage System for Microgrid Considering the Life Loss

微电网储能系统容量配置不同会使系统使用寿命不同进而影响微电网投资成本。根据微电网实际工作状态,采用雨流计数法统计寿命估算所需的储能系统充放电深度,并建立储能寿命损耗模型对微电网储能系统进行寿命估算。以微电网综合运行成本,储能系统投资及运行维护成本之和最小为目标建立储能系统容量配置模型,并采用粒子群算法对模型进行求解,根据储能系统工作循环建立储能系统设备利用率指标用以评价容量配置结果。算例分析表明,所提方法能够优化容量配置结果,避免容量浪费,减小微电网投资成本,提高了微电网运行的经济性。

The life span of the microgrid energy storage system varies with different capacity configurations.Thus,the efficiency of investment to the microgrid will be affected by the capacity configuration.According to the actual working state of microgrid,the charging and discharging depth of the energy storage system required can be estimated by the rain counting method.The energy storage life loss model is established to estimate the remaining life span of the microgrid energy storage system.The minimum sum of the operation cost of microgrid,the energy storage system investment and operation maintenance cost are set as the goal for the particle swarm algorithm,and the energy storage system capacity allocation model is built and solved.The energy storage system working cycle is used to establish the energy storage system equipment utilization index for evaluating the capacity allocation results.The example shows that the proposed method can optimize the capacity allocation results,avoiding wasting the capacity,reducing the investment cost of microgrid,thus increasing the economic benefits of the microgrid operation.