Application of fuzzy logic for charging control of lead-acid battery in stand-alone solar photovoltaic system

Abstract

Overcharging in lead acid battery which is widely used in solar systems is a result of improper charging control.Overcharging can be prevented by designing a suitable control system for charging of batteries. A good charging control system will decrease the storage capacity and service time for power supply. In the current study, an attempt has been made to design a PI algorithm based charging control system for a first-order dynamic model of the lead acid battery system. To track the setpoint response and to reject the disturbances due to external factors such as change in intensity of the solar radiation, a feedback control system has been designed. As the problem approaches to a highly non linear process, conventional control theory is not an appropriate choice. A fuzzy logic controller with a specially chosen triangular membership function has been suggested as an effective alternative approach. It is proved that by employing fuzzy logic technique, the voltage of the battery can be controlled effectively than with a conventional controller.

Development of energy-saving technology to support functioning of the lead-acid batteries

“…In order to optimize the maintenance of the accumulator battery sub-charge under conditions of a partial discharge, article [7] presented experimental methods to determine the capacity of the accumulator battery remaining after discharge, but the methods are based on measurements in real time. In paper [8], it was concluded that the traditional control systems for a change in the charge parameters based on voltage measurements and associated with the change of external factors, such as the change of solar radiation while using photovoltaic systems are not effective. In connection with the influence of diffusion processes on the charge of a battery, it was proposed to use a fuzzy logic controller, but without coordination with the electrochemical charge process [9].…”

Effect of Time Factor on the Battery Voltage State of Charge from Foot Beats Piezoelectric System

“…On the other hand, several studies have focused on the methods of estimating the state of charge of a battery [49][50][51][52][53]; others studied the techniques of charging lead-acid battery [54][55][56][57]. Although Rakshana [56] highlighted different techniques of changing lead-acid batteries such as constant current charging, constant voltage charging methods and use of converters, the study proposed the use of Buck Boost converters because of their many advantages such as: charging multiple batteries simultaneously with the series-connected Buck Boost BPM; controlling the battery current by adjusting the duty ratio of the buck-boost converter; controlling the charge and discharge of each battery by adjusting the working ratio of the connected converter; and isolating fully charged batteries or damaged batteries without interrupting the charging process.…”

A Review on Battery Charging and Discharging Control Strategies: Application to Renewable Energy Systems

“…Fu-shun et al [52] observed that using a PIC6014 microcontroller as control core in the design of the FLC, the battery charge time is reduced two hours compared to the three stage control method. Swathika et al [53] show that using a FLC the voltage of the battery can be controlled effectively than with a conventional controller. Also, the ISE (Integral of Square Error), IAE (Integral of the Absolute value of the Error) and settling time can be reduced considerably in comparison to a PI control.…”