光伏发电系统设计方案中不同AGC控制策略的应用研究OA

In recent years,the installed capacity of PV power generation has significantly increased,but due to the lack of stability in the output power of PV power generation,there are certain power curtailment.This paper takes a PV power generation system in Hebei Province as an example.Firstly,by sorting out the measured data of nearby operating PV power generation system,the power curtailment situation is classified.Then,the conventional power curtailment situation under different AGC control strategies is analyzed,and the impact of different AGC control strategies on the correlation between solar irradiation and power generation capacity of PV power generation system is analyzed to prove whether there is a ramp curtailment situation.Therefore,the power curtailment period and curtailment rate of this PV power generation system are determined.Finally,eleven PV power generation system design schemes using different PV brackets and different PV power to inverter power ratios are proposed,and the impact of power curtailment on the power generation capacity and economy of different design schemes is analyzed to determine the PV power generation system design scheme with higher economic benefits.The research results show that under the same power curtailment situation,regardless of whether fixed PV brackets or flat single axis PV brackets are used,high PV power to inverter power ratio can effectively reduce the impact of power curtailment on the economy of PV power generation projects.From the perspective of PV bracket types,when the PV power to inverter power ratio and conventional power curtailment rate are the same,compared to the design scheme using fixed PV brackets,the design scheme using flat single axis PV brackets is less affected.The Annual comprehensive curtailment rate has a significant impact on the selection of PV bracket types,and the more severe the power curtailment situation,the greater the economic advantage of flat single axis PV brackets.Overall,under different power curtailment,appropriate types of PV brackets and PV power to inverter power ratios should be selected to alleviate the impact of power curtailment and increase project revenue.The research results can provide reference for the design of PV power generation systems for similar projects under different power curtailment.