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    Power Gain and Daily Improvement Factor in Stand Alone Photovoltaic Systems With Maximum Power Point Tracking Charge Regulators. Case of Study: South of Spain

    Source: Journal of Solar Energy Engineering:;2013:;volume( 135 ):;issue: 004::page 41011
    Author:
    Muأ±oz, F. J.
    ,
    Jimأ©nez, G.
    ,
    Fuentes, M.
    ,
    Aguilar, J. D.
    DOI: 10.1115/1.4025205
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The performance reliability of a standalone photovoltaic system (SAPV) depends on the longterm performance of the batteries. In this way, a charge controller becomes an essential device which not only prevents the batteries from suffering deep discharges and overvoltages but also monitors the battery state of charge (SOC) in order to maximize charging efficiency and energy availability. At present, pulse width modulated (PWM) charge regulators dominate the market for this type of component in SAPV systems. However, in recent years, to improve energy management, more manufacturers have developed controllers with strategies for maximum power point tracking (MPPT). PWM charge controllers do not always make optimum use of the available power given by the maximum power point and this gives a loss of power. These power losses depend on battery voltage, irradiance and temperature. However, they can be avoided by using a MPPT charge controller which operates the array at its maximum power point under a range of operating conditions, as well as regulating battery charging. The advantage, in terms of energy gain, provided by this type of charge regulator depends on weather conditions. This paper will study the power gain provided by this type of charge controller, depending on the module temperature and the battery voltage. The paper will, additionally, provide a study of the gain in energy yield, also shown as improvement factor, F, for SAPV systems installed in Jaأ©n (South of Spain). This study may illustrate the behavior of these two types of charge controllers in warm weathers, like Mediterranean climates. Furthermore, it will analyze the suitability of MPPT charge controllers and their benefits in this type of climate. It will be shown that MPPT charge regulator global efficiency constitutes a key issue in making a choice between MPPT and PWM charge regulators. The results given here may be not only of interest for SAPV systems with no access to the electricity grid but also for battery backup PV gridconnected PV (GCPV) systems.
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      Power Gain and Daily Improvement Factor in Stand Alone Photovoltaic Systems With Maximum Power Point Tracking Charge Regulators. Case of Study: South of Spain

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    contributor authorMuأ±oz, F. J.
    contributor authorJimأ©nez, G.
    contributor authorFuentes, M.
    contributor authorAguilar, J. D.
    date accessioned2017-05-09T01:02:44Z
    date available2017-05-09T01:02:44Z
    date issued2013
    identifier issn0199-6231
    identifier othersol_135_04_041011.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/153210
    description abstractThe performance reliability of a standalone photovoltaic system (SAPV) depends on the longterm performance of the batteries. In this way, a charge controller becomes an essential device which not only prevents the batteries from suffering deep discharges and overvoltages but also monitors the battery state of charge (SOC) in order to maximize charging efficiency and energy availability. At present, pulse width modulated (PWM) charge regulators dominate the market for this type of component in SAPV systems. However, in recent years, to improve energy management, more manufacturers have developed controllers with strategies for maximum power point tracking (MPPT). PWM charge controllers do not always make optimum use of the available power given by the maximum power point and this gives a loss of power. These power losses depend on battery voltage, irradiance and temperature. However, they can be avoided by using a MPPT charge controller which operates the array at its maximum power point under a range of operating conditions, as well as regulating battery charging. The advantage, in terms of energy gain, provided by this type of charge regulator depends on weather conditions. This paper will study the power gain provided by this type of charge controller, depending on the module temperature and the battery voltage. The paper will, additionally, provide a study of the gain in energy yield, also shown as improvement factor, F, for SAPV systems installed in Jaأ©n (South of Spain). This study may illustrate the behavior of these two types of charge controllers in warm weathers, like Mediterranean climates. Furthermore, it will analyze the suitability of MPPT charge controllers and their benefits in this type of climate. It will be shown that MPPT charge regulator global efficiency constitutes a key issue in making a choice between MPPT and PWM charge regulators. The results given here may be not only of interest for SAPV systems with no access to the electricity grid but also for battery backup PV gridconnected PV (GCPV) systems.
    publisherThe American Society of Mechanical Engineers (ASME)
    titlePower Gain and Daily Improvement Factor in Stand Alone Photovoltaic Systems With Maximum Power Point Tracking Charge Regulators. Case of Study: South of Spain
    typeJournal Paper
    journal volume135
    journal issue4
    journal titleJournal of Solar Energy Engineering
    identifier doi10.1115/1.4025205
    journal fristpage41011
    journal lastpage41011
    identifier eissn1528-8986
    treeJournal of Solar Energy Engineering:;2013:;volume( 135 ):;issue: 004
    contenttypeFulltext
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