### Abstract

The maximum power of a photovoltaic system can reduce significantly under partial shading conditions. Bypass diodes can be used in photovoltaic systems to bypass the shaded photovoltaic modules during partial shading. The bypass diode possesses a forward voltage that introduces a voltage drop in the photovoltaic system upon activation. Therefore, the maximum power of a photovoltaic system can reduce further during partial shading due to the forward voltage of the bypass diode. This paper presents an investigation into the effect of bypass diode forward voltage on the maximum power of a photovoltaic system under partial shading conditions. The results indicated that the forward voltage of the bypass diode did not necessarily decrease the maximum power of the photovoltaic system. This depends on whether the maximum power is delivered at a lower or higher voltage. When the maximum power is delivered at a higher voltage, it is insusceptible to the forward voltage. Conversely, when the maximum power is delivered at a lower voltage, it is susceptible to the forward voltage. In the worst-case scenario, the forward voltage of the bypass diode reduced the maximum power of the photovoltaic system by 16.48%, which was already subject to partial shading loss.

Original language | English |
---|---|

Article number | 116491 |

Journal | Energy |

Volume | 191 |

DOIs | |

Publication status | Published - 15 Jan 2020 |

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### All Science Journal Classification (ASJC) codes

- Civil and Structural Engineering
- Building and Construction
- Pollution
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering

### Cite this

*Energy*,

*191*, [116491]. https://doi.org/10.1016/j.energy.2019.116491

}

*Energy*, vol. 191, 116491. https://doi.org/10.1016/j.energy.2019.116491

**Impact of bypass diode forward voltage on maximum power of a photovoltaic system under partial shading conditions.** / Teo, J. C.; Tan, Rodney H.G.; Mok, V. H.; Ramachandaramurthy, Vigna K.; Tan, Chia Kwang.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Impact of bypass diode forward voltage on maximum power of a photovoltaic system under partial shading conditions

AU - Teo, J. C.

AU - Tan, Rodney H.G.

AU - Mok, V. H.

AU - Ramachandaramurthy, Vigna K.

AU - Tan, Chia Kwang

PY - 2020/1/15

Y1 - 2020/1/15

N2 - The maximum power of a photovoltaic system can reduce significantly under partial shading conditions. Bypass diodes can be used in photovoltaic systems to bypass the shaded photovoltaic modules during partial shading. The bypass diode possesses a forward voltage that introduces a voltage drop in the photovoltaic system upon activation. Therefore, the maximum power of a photovoltaic system can reduce further during partial shading due to the forward voltage of the bypass diode. This paper presents an investigation into the effect of bypass diode forward voltage on the maximum power of a photovoltaic system under partial shading conditions. The results indicated that the forward voltage of the bypass diode did not necessarily decrease the maximum power of the photovoltaic system. This depends on whether the maximum power is delivered at a lower or higher voltage. When the maximum power is delivered at a higher voltage, it is insusceptible to the forward voltage. Conversely, when the maximum power is delivered at a lower voltage, it is susceptible to the forward voltage. In the worst-case scenario, the forward voltage of the bypass diode reduced the maximum power of the photovoltaic system by 16.48%, which was already subject to partial shading loss.

AB - The maximum power of a photovoltaic system can reduce significantly under partial shading conditions. Bypass diodes can be used in photovoltaic systems to bypass the shaded photovoltaic modules during partial shading. The bypass diode possesses a forward voltage that introduces a voltage drop in the photovoltaic system upon activation. Therefore, the maximum power of a photovoltaic system can reduce further during partial shading due to the forward voltage of the bypass diode. This paper presents an investigation into the effect of bypass diode forward voltage on the maximum power of a photovoltaic system under partial shading conditions. The results indicated that the forward voltage of the bypass diode did not necessarily decrease the maximum power of the photovoltaic system. This depends on whether the maximum power is delivered at a lower or higher voltage. When the maximum power is delivered at a higher voltage, it is insusceptible to the forward voltage. Conversely, when the maximum power is delivered at a lower voltage, it is susceptible to the forward voltage. In the worst-case scenario, the forward voltage of the bypass diode reduced the maximum power of the photovoltaic system by 16.48%, which was already subject to partial shading loss.

UR - http://www.scopus.com/inward/record.url?scp=85075425393&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85075425393&partnerID=8YFLogxK

U2 - 10.1016/j.energy.2019.116491

DO - 10.1016/j.energy.2019.116491

M3 - Article

AN - SCOPUS:85075425393

VL - 191

JO - Energy

JF - Energy

SN - 0360-5442

M1 - 116491

ER -