Research on Capacity Configuration of Optical Storage Integrated Converter
Photovoltaic output power has significant fluctuations,randomness,and intermittency,which will have a significant impact on the safe and stable operation of the power grid.This article studies the capacity configuration scheme of photovoltaic arrays,energy storage devices,and MMC based integrated converters for centralized photovoltaic power plants with a capacity of 100 megawatts.Regarding the configuration of photovoltaic capacity,consider compensating losses for DC overshoot.The energy storage capacity is obtained by solving a two-layer optimization model,with the inner model considering the optimization scheduling of the integrated solar energy storage system,optimizing the charging and discharging of the energy storage system at each time period,and the outer model aiming for optimal economy.Considering the capacity requirements for grid support,propose the capacity configuration of the inverter to form a capacity design suitable for grid connection of 100 MW level photovoltaic power plants.Capable of achieving distributed and flexible access to hundreds of photovoltaic arrays and energy storage devices,as well as flexible regulation of the centralized output and energy of high-capacity photovoltaic power generation,laying the foundation for the prototype of modular multi-level integrated photovoltaic storage inverters.
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