Multi-objective Optimization Strategy of Wind Storage System Considering Frequency Modulation Reliability
Aiming at the frequency instability of the power system caused by the strong uncertainty of wind power,a multi-objective optimization strategy for the wind storage system considering the reliability of frequency regulation was proposed.Based on wind power prediction data,the wind storage system was used to provide frequency support to the power system and ensure the frequency stability of the power sys-tem.The strategy consisted of two steps including compensation and frequency regulation.Firstly,a wind power prediction error compensation strategy based on the energy storage system was proposed,and the wind power prediction error was compensated to within 10％,while 20％of the frequency regulation ca-pacity was reserved for the wind farm.Secondly,considering the economics of system frequency regula-tion,the wind storage system based on model prediction control was proposed to participate in the fre-quency control strategy of the power system,and the wind power standby and energy storage system were used for frequency regulation.Finally,the multi-objective Harris hawk optimizer(HHO)algorithm was used to solve for the energy storage capacity that satisfied the above dual objectives as a constraint to veri-fy the effectiveness of the strategy.The simulation results show that the proposed frequency regulation strategy can reduce the frequency fluctuation of the grid on the basis of ensuring the reliability of frequen-cy regulation,and meet the efficient and safe operation of the wind power system and the grid.
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