The optimal control strategy for integrated system of wind/photovoltaic/energy storage considering the frequency constraint

摘要

As more and more clean energy is exploited and utilized, absorption is one of the hot issues of research nowadays. The proportion of new energy in the system is higher and higher, which poses a great challenge to the system frequency stability and energy storage life and capacity. This paper proposes a new optimal scheduling model for system of wind/photovoltaic/ storage. Because of the complementarity of wind and photovoltaic energy, the combination of the two can effectively reduce the randomness of the output. Using the frequency modulation capability of the wind turbine and PV unit to track the prediction curve can reduce the burden of energy storage equipment and increase economy. An optimal dispatching model aimed at generation cost is established, and the frequency constraint is added based on traditional constraint conditions to prevent the frequency deviation from exceeding the allowable value. Finally, the actual data is used for simulation analysis to compare the results of different regulatory strategies and verify the advantages of the proposed strategy.