Lithium Titanate Battery Management System Based on MPPT and Four-Stage Charging Control for Photovoltaic Energy Storage

Abstract

To overcome the unstable photovoltaic input and high randomness in the conventional three-stage battery charging method, this paper proposes a charging control strategy based on a combination of maximum power point tracking (MPPT), and an enhanced four-stage charging algorithm for a photovoltaic power generation energy storage system. This control algorithm ensures that the charging process is not affected by fluctuations in the photovoltaic power. The discharge bus waveform, push–pull discharge load switching waveform, push–pull circuit efficiency, and voltage and current regulation accuracies of the system were investigated. The experimental results show that the charging process is consistent with the designed four-stage charging control algorithm, the voltage and current regulation accuracies satisfy the charging requirements, the busbar remained stable during the battery charging and discharging switch, and the battery balancing effect was good.

Modified Levy Flight Optimization for a Maximum Power Point Tracking Algorithm under Partial Shading

“…The carbon emitted from fossil fuel has become an environmental pollutant. Thus, the need for low carbon-based sources of electricity (green energy) such as wind, solar, biomass, etc., is essential in the coming future [5,6]. Among these sources, solar photovoltaic (PV) energy is seen as the best potential candidate due to its availability and cleanliness [7][8][9][10].…”

Modeling and experimental analysis of battery charge controllers for comparing three off-grid photovoltaic power plants

“…The solar PV system has two modes of configuration: off-grid and grid-connected PV systems. The off-grid system has a storage system that charges and supplies power to the loads when there is no radiation [ 1 , 2 ]. Off-grid systems are beneficial because there is no restriction regarding the areas of installations, such as highlands and islands, where electricity and telecommunication are absent, or places that struggle for grid connections comprising rural electrification and street lighting [ 3 ].…”