System dynamic model and charging control of lead-acid battery for stand-alone solar PV system

Handle URI:
http://hdl.handle.net/10754/599612
Title:
System dynamic model and charging control of lead-acid battery for stand-alone solar PV system
Authors:
Huang, B.J.; Hsu, P.C.; Wu, M.S.; Ho, P.Y.
Abstract:
The lead-acid battery which is widely used in stand-alone solar system is easily damaged by a poor charging control which causes overcharging. The battery charging control is thus usually designed to stop charging after the overcharge point. This will reduce the storage energy capacity and reduce the service time in electricity supply. The design of charging control system however requires a good understanding of the system dynamic behaviour of the battery first. In the present study, a first-order system dynamics model of lead-acid battery at different operating points near the overcharge voltage was derived experimentally, from which a charging control system based on PI algorithm was developed using PWM charging technique. The feedback control system for battery charging after the overcharge point (14 V) was designed to compromise between the set-point response and the disturbance rejection. The experimental results show that the control system can suppress the battery voltage overshoot within 0.1 V when the solar irradiation is suddenly changed from 337 to 843 W/m2. A long-term outdoor test for a solar LED lighting system shows that the battery voltage never exceeded 14.1 V for the set point 14 V and the control system can prevent the battery from overcharging. The test result also indicates that the control system is able to increase the charged energy by 78%, as compared to the case that the charging stops after the overcharge point (14 V). © 2010 Elsevier Ltd. All rights reserved.
Citation:
Huang BJ, Hsu PC, Wu MS, Ho PY (2010) System dynamic model and charging control of lead-acid battery for stand-alone solar PV system. Solar Energy 84: 822–830. Available: http://dx.doi.org/10.1016/j.solener.2010.02.007.
Publisher:
Elsevier BV
Journal:
Solar Energy
KAUST Grant Number:
KUK-C1-014-12
Issue Date:
May-2010
DOI:
10.1016/j.solener.2010.02.007
Type:
Article
ISSN:
0038-092X
Sponsors:
This publication is based on work supported in part by Award No. KUK-C1-014-12, granted by King Abdullah University of Science and Technology (KAUST) and Project No. 97-D0137-1, provided by the Energy Bureau, Ministry of Economic Affairs, Taiwan.
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHuang, B.J.en
dc.contributor.authorHsu, P.C.en
dc.contributor.authorWu, M.S.en
dc.contributor.authorHo, P.Y.en
dc.date.accessioned2016-02-28T06:30:52Zen
dc.date.available2016-02-28T06:30:52Zen
dc.date.issued2010-05en
dc.identifier.citationHuang BJ, Hsu PC, Wu MS, Ho PY (2010) System dynamic model and charging control of lead-acid battery for stand-alone solar PV system. Solar Energy 84: 822–830. Available: http://dx.doi.org/10.1016/j.solener.2010.02.007.en
dc.identifier.issn0038-092Xen
dc.identifier.doi10.1016/j.solener.2010.02.007en
dc.identifier.urihttp://hdl.handle.net/10754/599612en
dc.description.abstractThe lead-acid battery which is widely used in stand-alone solar system is easily damaged by a poor charging control which causes overcharging. The battery charging control is thus usually designed to stop charging after the overcharge point. This will reduce the storage energy capacity and reduce the service time in electricity supply. The design of charging control system however requires a good understanding of the system dynamic behaviour of the battery first. In the present study, a first-order system dynamics model of lead-acid battery at different operating points near the overcharge voltage was derived experimentally, from which a charging control system based on PI algorithm was developed using PWM charging technique. The feedback control system for battery charging after the overcharge point (14 V) was designed to compromise between the set-point response and the disturbance rejection. The experimental results show that the control system can suppress the battery voltage overshoot within 0.1 V when the solar irradiation is suddenly changed from 337 to 843 W/m2. A long-term outdoor test for a solar LED lighting system shows that the battery voltage never exceeded 14.1 V for the set point 14 V and the control system can prevent the battery from overcharging. The test result also indicates that the control system is able to increase the charged energy by 78%, as compared to the case that the charging stops after the overcharge point (14 V). © 2010 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipThis publication is based on work supported in part by Award No. KUK-C1-014-12, granted by King Abdullah University of Science and Technology (KAUST) and Project No. 97-D0137-1, provided by the Energy Bureau, Ministry of Economic Affairs, Taiwan.en
dc.publisherElsevier BVen
dc.subjectBattery charge controlen
dc.subjectDynamic modelling of batteryen
dc.subjectLead-acid battery modellingen
dc.subjectStand-alone solar systemen
dc.titleSystem dynamic model and charging control of lead-acid battery for stand-alone solar PV systemen
dc.typeArticleen
dc.identifier.journalSolar Energyen
dc.contributor.institutionNational Taiwan University, Taipei, Taiwanen
kaust.grant.numberKUK-C1-014-12en
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