储能电站降低光伏电站弃光率需求分析

Demand Analysis of Energy Storage Station Reducing Photovoltaic Power Plant Abandoned Electricity

基于格尔木地区某50 MW光储电站运行数据,分析了电站所在区域气象特征、光伏电站输出功率特性、光伏电站限电情况、储能电站出力特性、储能电站运行模式。通过对光伏储能联合电站实际运行数据分析得出,光伏电站加入储能系统后有效提升了光伏上网电量,并可实现弃光率低于5%的目标。但现有的储能系统成本及电网调度模式下,配置储能系统不能收回成本,需要给予储能电站财政补贴。现有调度模式不适用于光伏储能联合电站,导致补贴成本较高。通过将无太阳辐射时段的调度指令值调整为0.1倍的光伏电站装机容量,可大幅降低补贴成本,储能电站容量一次性建设补贴降低67.02%,储能电站独立发电电价补贴降低86.82%,光储电站联合发电电价补贴降低52.97%。

Based on operation data of a 50 MW photovoltaic ＆ storage power station in Golmud area, this paper analyzed the meteorological characteristics, output characteristics of photovoltaic power plants, photovoltaic power limit, energy storage power output characteristics and energy storage power station operation modes. Through the analysis of the actual operation data,lt is concluded that the photovokaic power station can effectively increase the photovoltaie power consumption and achieve the goal of abandoned electricity less than 5% after the energy storage system is added. However, under the existing energy storage system cost and power grid dispatching mode, the energy storage system can not recover the cost ,which needs to be given financial subsidies to energy storage power plants. The existing scheduling mode is not suitable for photovoltaie energy storage and power plants, that leads to higher cost subsidies. Through adjusting the non-solar radiation time scheduling rate to 0.1 times of the installed capacity of photovoltaie power plant,it can greatly reduce the cost of subsidies, the energy storage power plant capacity one-time construction subsidies are reduced by 67. 02% , the energy storage station independent power price subsidies are decreased by 86. 82%. The photovoltaie ＆ storage power station combined power price subsidies are reduced by 52.97%.