Power Allocation Strategy for Hybrid Energy Storage in Photovoltaic-integrated Power Systems
Photovoltaic-integrated power generation systems feature random and intermittent power generation susceptible to external environment which easily causes DC-side power fluctuations and results in unstable power input of inverters.In view of this,the present work made an attempt at using hybrid energy storage system of batteries and supercapacitors for power compensation to maintain equilibrium with the grid-connected power supply.In order to prevent supercapacitors from overcharge and overdischarge and harming the system's safe operation,a power allocation strategy considering the state of charge(SOC)of supercapacitors was proposed,which adopts linear active disturbance-tolerant(LADRC)double closed-loop control.Simulation results showed that the strategy facilitates addressing the unstable output power of grid-connected inverter and prevents overcharge and overdischarge of supercapacitors,thereby is conducive to the systems'safe operation.
photovoltaic integrationhybrid energy storagepower allocationlinear active disturbance tolerance
万方数据
维普
