Research and application of economic improvement strategy for hybrid energy storage frequency modulation project
Energy storage system assisted thermal power unit frequency regulation is limited by the capacity of storage device,and its output power can not track the command power for a long time.At the same time,lithium battery energy storage technology also exists problems in safety hazards,cycle life limitations,limited enhancement of unit frequency gain gain and other issues.For this reason,the characteristics of high cycle life and high safety of supercapacitor are used to construct the simulation model of hybrid energy storage system assisted coal-fired thermal power unit frequency regulation in Matlab/Simulink platform.Combining with the operating state of thermal power unit and energy storage system,a set of control strategy based on index calculation and fuzzy control synergy is designed to achieve the adaptive adjustment of hybrid energy storage system output under dynamic operating conditions.Simulations show that,the control strategy can effectively extend the service life of lithium batteries and efficiently utilize the residual power of the hybrid energy storage system.Compared with the conventional control strategy of hybrid energy storage system,the proposed control strategy reduces the average daily use time of lithium battery by 60%,improves the comprehensive index of frequency regulation performance by 34%,and increases the average daily revenue by 20 000 yuan,which has high engineering application value.
large-capacity supercapacitorsservice lifecomprehensive index of frequency modulation performancefuzzy controlindex calculation
国家科技期刊平台
NSTL
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