Views: 56 Author: Site Editor Publish Time: 2024-06-25 Origin: Site
As the environment changes with the beginning of spring and nature slowly comes to life, the best moment for solar energy production is near. This article presents guidelines for the continuous functioning and management of photovoltaic PV systems throughout the year.
-Shading from houses, leaves, bird’s droppings etc. can have a severe impact on the performance of PV modules. This shading can cause a "hot spot effect," where cells that are shaded harvest energy from adjacent cells, which locally overheats and might be damaged. To prevent this, keep the electrical characteristics of the PV cells identical and add bypass diodes on the modules. Also take DC insurance on every PV string to avoid parallel circuit overheating.
PV equipment is destroyed by lightning in summer storms. To protect the systems:
- Ground PV array properly to the bracket.
- Ground and shield PV Meter box from Lightning.
- Ground the PV inverter.
A separate grounding system is usually not required, especially if the grounding of the PV system is integrated into the existing system of the building. If you require a lightning rod, that depends.
Solar PV for homes is lightning protected and doesn’t usually need to be disconnected during a thunderstorm. But you can add a bit of safety by unplugging the circuit breaker switch in the meter box to safeguard the PV module from lightning directly. Maintenance staff needs to test the lightning protection module immediately after a storm.
Do not immediately fix parts if they get destroyed during a storm. Wait for the early morning or the late afternoon. Let the maintenance people of the power station know to have competent individuals replace the batteries.
Temperatures of above 35 degrees lower the efficiency of PV modules. Ventilation and heat transfer for better power generation efficiency are key; the most widely adopted form is wind.
Especially in dry fall months, we need to be careful to prevent and fight fires related to houses with PV installations. Do not place flammable and explosive materials around the system. PV systems must be able to self-detect and arc-recognize, and possess fire-protective capabilities including an emergency DC system disconnect switch. Maintain a fire prevention and maintenance line at intervals of no more than 40 meters.
While PV modules can produce power when solar irradiance is low, a persistent rain or in the case of thick fog will reduce it even more and make the system not functional if the voltage goes below the inverter starting voltage level. For grid-connected PV systems, however, this is no problem since the grid ensures that power will still be available if the demand cannot be covered by the PV system.
This relationship Why it is important This relationship shows the variation of the electricity generation in the winter.
Seasonal characteristics like low irradiation intensity during winter, small number of sunlit hours and low temperatures respectively, have negative impacts on the power generation of the PV system. However, grid-connected residential PV systems guarantee the delivery of power at any one time as long as the grid is present.
It is also necessary to wash the PV modules after the heavy snow has accumulated on them. As a result, it is advisable to use soft implements in order not to cause scratches on the glass. This is especially so as the occupants should not walk on the modules so as to avoid unnoticed crack or damage formations. Don’t wait for the snow to accumulate in large volume to clean it since it will thicken to cause Icing.
Hail resistance is built into home distributed PV systems. Parts are usually approved by CGC, CQC or TUV and may withstand shock of hailstones of 25mm diameter at velocities at 23m/sec. This means that the system is protected against hail damage and that its wiring is not interfered with.
These recommendations mentioned for the four seasons shall help in preventing occurrence of problems affecting the smooth and safe functioning of the photovoltaic system all the year round.
