在高源荷比局域电网中，光伏发电系统通常在正午时分出力最大而夜晚停运，合理配置光储联合发电系统储能容量，既可降低弃光，又能在夜间为重要负荷供电。针对光伏发电系统，定义基于光伏发电系统的广义负荷及净广义负荷的概念，利用光伏穿透功率的大小划分光伏系统运行状态，据此提出光储联合发电系统的评价指标，以3种指标之和最小、储能成本最低为目标进行容量配置。该方法针对光伏发电系统在不同运行状态的特点提出不同的评价指标，使储能系统的充放电策略更具针对性。算例验证了所提指标的合理性，并对比分析不同储能容量配置下的指标变化。

In the high source-to-charge local power grid, the photovoltaic power generation system usually has the largest output at noon and stops at night. If the energy storage capacity of the optical storage combined power generation system is properly configured, the abandoned light can be reduced, and the important load can be supplied at night. For the photovoltaic power generation system, the definition of the generalized load and the net generalized load based on the photovoltaic power generation system is defined. The operating state of the photovoltaic system is divided by the size of the photovoltaic penetration power. Based on this, the evaluation index of the optical storage combined power generation system is proposed, with three indicators. The capacity is configured with the minimum and the lowest energy storage cost. The method proposes different evaluation indexes for the characteristics of photovoltaic power generation systems in different operating states, so that the charging and discharging strategies of energy storage systems are more targeted. The example verifies the rationality of the proposed indicators and compares and analyzes the changes of indicators under different energy storage capacity configurations.