Model of Photovoltaic Cell Circuits under Partial Shading

Kajihara, Atsushi; Harakawa, A.T.

doi:10.1109/icit.2005.1600757

Cited by 100 publications

(55 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As calculated by Eqs. (11) to (14), the open-circuit voltage of a bypass diode area is approximately 10.5 V; the voltage of MPP is 8.4 V; and the voltage interval from one LMPP to the next LMPP can be set at 9.4 V. The simulation module is shown in Fig. 12.…”

Section: A Simulation and Resultsmentioning

confidence: 99%

“…Repeated measurements would also increase energy loss. To reach GMPP more rapidly, some load line-based methods have been proposed [13], [14].The load line method is a two-stage method based on load line regulation to search for GMPP [13]. In the first pattern, the operating point moves toward the vicinity of GMPPT on the load line R PM = V PM /I PM .…”

Section: Introductionmentioning

confidence: 99%

“…However, the author did not provide the principle of this method, which is therefore not applicable to all PSCs. The load line method is based on the characteristics of I-V curves in [14]. The theory behind this method, as proposed in [14], was not stated, and the experiments the paper implemented were insufficient.…”

Section: Introductionmentioning

confidence: 99%

“…The load line method is based on the characteristics of I-V curves in [14]. The theory behind this method, as proposed in [14], was not stated, and the experiments the paper implemented were insufficient. Fibonacci search method is proposed in [15].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Improved Global Maximum Power Point Tracking Method Based on Voltage Interval for PV Array under Partially Shaded Conditions

Ding¹,

Xiang²,

Zhai³

et al. 2014

Journal of Power Electronics

View full text Add to dashboard Cite

The power-voltage (P-V) curve of photovoltaic (PV) arrays connected in parallel to bypass diodes would have several local maximum power points (LMPP) under partial shading conditions (PSC). Conventional maximum power point tracking (MPPT) methods fail to search for the global maximum power point (MPP) because the searched peak point may remain at the LMPP on the P-V curve under PSC. This study proposes an improved MPPT algorithm to ensure that PV arrays operate at global maximum power point (GMPP) under PSC. The proposed algorithm is based on a critical study and a series of observations of PV characteristics under PSC. Results show the regularity of voltage interval between LMPPs. The algorithm has the advantages of rapidly reaching GMPP, maintaining stability, and recovering GMPP quickly when the operating condition changes. Simulation and experimental results demonstrate the feasibility of the proposed algorithm.

show abstract

Section: A Simulation and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improved Global Maximum Power Point Tracking Method Based on Voltage Interval for PV Array under Partially Shaded Conditions

Ding¹,

Xiang²,

Zhai³

et al. 2014

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…Shade impact depends on module type, fill factor, bypass diode placement severity of shade and string configuration. Power loss occurs from shade, also current mismatch within a PV string and voltage mismatch between parallel strings [7]. Typically, a crystalline silicon module will contain bypass diodes to prevent damage from reverse bias on partially shaded cells.…”

Section: Partial Shading and Bypass Diodesmentioning

confidence: 99%

Partial Shading of PV System Simulation with Experimental Results

Alsayid¹,

Alsadi²,

Jallad³

et al. 2013

SGRE

View full text Add to dashboard Cite

In a solar photovoltaic array, it is possible that shadow may fall over some of its cells. Under partial shading conditions the PV characteristic gets more complex with multiple peaks. The purpose of this paper is to illustrate, by analyzing different shading situations, the effects that partial shading can cause in a PV array. First this is done by simulation using Matlab/Simulink, then the impact of shading is illustrated experimentally by measurements on a two commercial 140 W PV panels series connected.

show abstract

Operation of series‐connected silicon‐based photovoltaic modules under partial shading conditions

Mäki

Valkealahti

Leppäaho

2011

Progress in Photovoltaics

View full text Add to dashboard Cite

Partial shading has been recognized as a major cause of energy losses in photovoltaic (PV) power generators. Partial shading has severe effects on the electrical characteristics of the PV power generator, because it causes multiple maximum power points (MPPs) to the power-voltage curve. Multiple maxima complicate MPP tracking, and the tracking algorithms are often unable to detect the global maximum. Considerable amount of available electrical energy may be lost, when a local MPP with low power is tracked instead of the global MPP. In this paper, the electrical characteristics of series-connected silicon-based PV modules under various partial shading conditions are studied by using a MATLAB/SIMULINK simulation model. The simulation model consists of 18 series-connected PV modules, corresponding to a single-phase grid-connected PV power generator. The validity of the simulation model has been verified by experimental measurements. The voltage and power characteristics of the PV power generator have been investigated under various system shading and shading strength conditions. The results can be utilized to develop new MPP tracking algorithms and in designing, for example, building integrated PV power generators.

show abstract

Model of Photovoltaic Cell Circuits under Partial Shading

Cited by 100 publications

References 1 publication

Improved Global Maximum Power Point Tracking Method Based on Voltage Interval for PV Array under Partially Shaded Conditions

Improved Global Maximum Power Point Tracking Method Based on Voltage Interval for PV Array under Partially Shaded Conditions

Partial Shading of PV System Simulation with Experimental Results

Operation of series‐connected silicon‐based photovoltaic modules under partial shading conditions

Contact Info

Product

Resources

About