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Grid connected pv system with partial shading effect

Grid connected pv system with partial shading effect

This video explain about partial shading effect of PV system with grid connected operation. The 3 MW PV system created with two parallel string model with 11 series connected PV panel. Simulation is created using MATLAB. The simulation results are explained for different partial shading pattern of the PV system with grid connection.

Grid-Connected PV System with Partial Shading Effect

As renewable energy becomes more prevalent, solar photovoltaic (PV) systems are gaining popularity as a viable energy source. However, one of the challenges with PV systems is the effect of partial shading on the performance of the system. In this article, we will explore the impact of partial shading on grid-connected PV systems and discuss the solutions available to mitigate these effects.

Introduction

The use of solar energy is a growing trend, with solar PV systems becoming a popular choice for generating electricity. A grid-connected PV system is an effective way of generating electricity that can be used by the consumer or fed back into the grid. However, the performance of the system can be affected by shading caused by buildings, trees, or other objects.

How Partial Shading Affects a Grid-Connected PV System

Partial shading on a PV panel can cause a significant reduction in the energy output of the system. This is because shading can create hotspots, which can cause damage to the panel and result in a drop in efficiency. Furthermore, shading on one panel can have an impact on the entire string of panels, reducing the overall output of the system. The impact of shading can be compounded by other factors such as temperature and angle of incidence.

The Solutions Available to Mitigate Partial Shading

There are several solutions available to mitigate the impact of partial shading on grid-connected PV systems. The most effective solution is to avoid shading altogether, by carefully choosing the location of the PV panels. This can be achieved by conducting a site survey to identify potential sources of shading and designing the system accordingly.

Another solution is to use bypass diodes, which allow current to flow around the shaded panel, reducing the impact of shading on the entire string. Another solution is to use microinverters, which convert DC power from each panel to AC power independently. This means that the shaded panel will not impact the output of the entire string.

The Role of Inverter Technology in Mitigating Partial Shading

Inverter technology plays a critical role in mitigating the impact of partial shading on grid-connected PV systems. Inverters convert the DC power generated by the PV panels to AC power, which can be used by the consumer or fed back into the grid. Inverter technology has evolved to include features such as Maximum Power Point Tracking (MPPT), which optimizes the output of the system even when panels are partially shaded. Inverters with MPPT can adjust the voltage and current of the system to maximize the output of the shaded panels, ensuring that the overall output of the system is not affected.

The Benefits of Grid-Connected PV Systems

Grid-connected PV systems offer several benefits, including reduced energy costs and increased energy independence. By generating their electricity, consumers can reduce their reliance on the grid, which can be especially beneficial in areas with unreliable or expensive grid power. Furthermore, consumers can sell excess power generated by the system back to the grid, further reducing energy costs and promoting renewable energy.

Conclusion

Partial shading can have a significant impact on the performance of grid-connected PV systems. However, there are solutions available to mitigate these effects, including careful system design, the use of bypass diodes or microinverters, and the use of inverter technology such as MPPT. Grid-connected PV systems offer several benefits, including reduced energy costs and increased energy independence. By incorporating the solutions discussed in this article, consumers can maximize the output of their PV system and realize the benefits of renewable energy.


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