In order to take full advantages of the new PV-Storage power station participating in power grid multi-time scale frequency modulation while considering the operation economy.First of all, according to the characteristics of photovoltaic modules, flywheel energy storage and lithium iron phosphate energy storage, their life cycle models are established respectively, and a coordinated operation strategy is proposed to reduce energy storage battery attenuation and improve frequency modulation performance.Second, click here on the basis of the primary and secondary frequency modulation mechanism, the model of PV-Storage power station participating in power grid frequency modulation capacity planning is established with the maximization of the frequency modulation revenue as the optimization objective function.
Finally, a simulation model of PV-Storage system is built by virtue of Matlab sapatilha infantil prata glitter software.The simulation results show that, as it is guaranteed that the requirements are fully met for second-level primary frequency modulation and minute-level secondary frequency modulation, the hybrid energy storage combined with photovoltaic reserve capacity can make resource planning more reasonable and improve both the economy and reliability of frequency modulation.Moreover, the reduction of flywheel cost will allow more capacity allocation so as to increase the frequency modulation income, hence the investment return period can be shortened.