New I-V Characteristics Scan-Type MPPT Control Method for PV Generation System

Itako,

doi:10.6000/1929-6002.2012.01.02.3

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…This system is based on the new I-V characteristics scan-type MPPT control method for PV generation system [9] which is developed in our lab. As an addition to maintain the low value of L and outstanding effectiveness in partially shaded environments, the system is developed to detect hotspot phenomena in real time.…”

Section: Proposed Real Time Hotspot Detection Systemmentioning

confidence: 99%

Real Time Hotspot Detection System Using Scan-Method for PV Generation System

Itako¹,

Hossam²,

Kudoh³

et al. 2016

JEPE

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This paper presents a real time hotspot detection system using scan-method about PV (photo voltaic) solar panel I-V characteristic based on the periodic inspection of the I-V curve of the PV panel in real time. The I-V tracking is performed by the means of periodic current sweeps during the normal operation of the panel. The current variation in a specific voltage range allows to distinguish hotspot cells from normal cells. In case if partial shadowing occurs to the PV panel, the PCS (power conditioning system) gives an immediate judgment whether hot-spot arises from one of the cells or not by applying the scan-method. The PCS is programed to calculate the current rate depending on the difference in the current divided by the short circuit current. From the experimental results, it is clarified that the hot-spot cells can be determined regardless of the solar intensity radiation.

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Section: Proposed Real Time Hotspot Detection Systemmentioning

confidence: 99%

Real Time Hotspot Detection System Using Scan-Method for PV Generation System

Itako¹,

Hossam²,

Kudoh³

et al. 2016

JEPE

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show abstract

“…However, it has several problems in actual application. So, Itako, et al [1][2][3][4] have discussed the improved MPPT control method. One of the problems of conventional P & O method is low efficiency and unstable operation when solar radiation changes drastically.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Improvement of PV Generation System by Using Improved P & O Method of MPPT

Huang¹,

Ge²

2015

JEPE

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Abstract:The conventional P & O (perturb-and-observe) method, which is the most widely used as MPPT (maximum power point tracking) control, has the problem of low efficiency and unstable operation when solar radiation changes drastically. Aiming at this problem, this paper improves the conventional P & O method to reduce the bad effect of solar radiation by shortening the sampling interval of PV module's output power while keeping the operating period unchanged. Experiments are conducted to study efficiency gains of improved method when solar radiation changes drastically. The result shows that, by this method, the efficiency of MPPT control can be increased 17% in average when PV module simulator is used and 20% at maximum when actual PV module is used, compared with the conventional P & O method.

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“…The result is that the output power may be substantially decreased. In order to solve this problem, the authors proposed new algorithm which detects maximum power point, scanning the I-V characteristics [5][6][7][8][9][10]. As this method is mounted into the PCS (power conditioning system), it is suitable for new installation of PV generation system.…”

mentioning

confidence: 99%

Study on Improvement of MPPT Efficiency in PV Generation System with Partial Shadow

Itako¹,

Ochiai²

2017

JEPE

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Abstract:The maximum power point of PV (photovoltaic) generation moves depending on weather conditions and load. Therefore, it is significant to make sure that the panels can work at the maximum power point under MPPT (maximum power point tracking) control. However, it has the problems of low efficiency and unstable operation when panels are covered by the partial shadow. The result is that the output power may be substantially decreased. To overcome this issue, the authors propose a new plug-in operation point correction system. This system is put between PV panels and PCS (power conditioning system) in the existing PV generation system. In this paper, the experimental results describe that the output electric energy increases approximately 1.4 times as compared with the conventional system when the proposed correction system is inserted.

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New I-V Characteristics Scan-Type MPPT Control Method for PV Generation System

Cited by 10 publications

References 9 publications

Real Time Hotspot Detection System Using Scan-Method for PV Generation System

Real Time Hotspot Detection System Using Scan-Method for PV Generation System

Efficiency Improvement of PV Generation System by Using Improved P & O Method of MPPT

Study on Improvement of MPPT Efficiency in PV Generation System with Partial Shadow

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