光-储联合并网发电系统建模与协调控制

Modeling and Coordinated Control of Grid-Connected PV Generation System With Energy Storage Devices

针对光伏并网发电系统具有随机性,且不具备故障暂态电压支撑能力的特征,提出一种有效调节功率且改善低电压穿越能力的光储联合并网发电系统动态模型及协调控制策略。在电力系统仿真分析平台DIgSILENT/Power Factory中建立了光储联合并网发电系统协调控制及低电压穿越功能模型。应用协调控制策略实现储能系统和静止同步补偿器功率平衡,维持并网点电压稳定。利用气象和负荷数据,验证了上述模型及协调控制策略的有效性。

In allusion to the randomness of grid-connected PV generation system that does not possess the ability to support fault-caused transient voltage,a dynamic model and corresponding coordinated control strategy for grid-connected PV generation system with energy storage devices that can effectively regulate power output and improve low-voltage ride through（LVRT） are proposed.A coordinated control model of grid-connected PV generation system with energy storage devices and an LVRT model are built on power system simulation analysis platform DIgSILENT/Power Factory.Using coordinated control strategy,the power balance between energy storage devices and static synchronous compensator（STATCOM） is implemented to make the voltage at grid-connected point stable.Availability of the proposed model and coordinated control strategy is verified by meteorological data and load data.