Solar energy paper index
Intelligent Grid-Connected Photovoltaic Energy Management through Hybrid Storage Regulation
One-line summary
A solar energy research paper on Intelligent Grid-Connected Photovoltaic Energy Management through Hybrid Storage Regulation.
Engineering notes
Engineering notes will be added by the Power for Solar editorial team.
Chinese explanation / 中文解读
中文解读待补充：本站会优先为光伏效率、钙钛矿太阳能电池、储能技术、太阳能热利用、BIPV、并网技术等高价值论文补充中文说明。
Original abstract
The increasing penetration of solar photovoltaic (PV) generation into modern distribution networks introduces significant power-quality and stability challenges, primarily due to the intermittent nature of solar irradiance and sudden load disturbances. Conventional proportional–integral (PI) controlled PV systems supported only by battery storage respond slowly to fast transients, resulting in deep voltage sags, large voltage swells, prolonged settling times, and high total harmonic distortion (THD). This paper proposes a Model Predictive Control (MPC) based energy-management scheme for a grid-connected hybrid PV system that combines a battery energy storage system (BESS) with a supercapacitor energy storage system (SCESS) on a common hybrid DC bus. The MPC controller receives the DC-link voltage reference, measured DC-link voltage, grid current, load power, battery and supercapacitor states of charge, and a predictive disturbance signal derived from irradiance, load, and grid-voltage sensors; it generates optimal gate signals for the boost converter and the three-phase inverter together with battery and supercapacitor power references. The complete system is modeled and simulated in MATLAB/Simulink and benchmarked against an existing PI-controlled PV–battery system. Simulation results demonstrate that the proposed MPC scheme limits the voltage sag to 400 V compared with 250 V for the PI system, restricts the voltage swell to 405 V against 550 V, achieves nearinstantaneous settling to the 400 V steady state, and reduces the output-voltage THD from 8.5% to 2.1%, comfortably satisfying the IEEE Std. 519 limit of 5%. The frequency-decoupled power sharing between the battery and the supercapacitor further reduces battery stress and improves the overall reliability and lifetime of the storage system.
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