The hot summer days are coming, the intensity of solar radiation is increasing, and the golden moment of efficient operation of photovoltaic power plants has followed. The sunny summer season will indeed increase the power generation. However, the high temperature, high humidity, heavy rainfall and other severe weather are relatively frequent, which may also cause potential adverse effects on the photovoltaic power station.
Faced with these complicated situations, paying attention to doing daily operation and maintenance work can truly ensure the stable power generation of photovoltaic power plants and achieve higher returns.
Prevent high temperatures from affecting components and inverters
In the summer high temperature conditions, the temperature of the back of the module can reach 70 ° C, and the operating junction temperature of the battery in the module is close to 100 ° C. Over temperature will cause the output power of the module to decrease. Therefore, in the case that the solar mounting brackets installation has been fixed, pay attention to the surrounding environment, such as timely cleaning out the weeds, sundries, etc. that may exist at the bottom of the component, and keep the solar mounting brackets ventilated and dissipated.
The inverter itself generates a lot of heat during operation, so the heat dissipation design is especially important. High temperature weather is a big test for inverters. During normal operation, the internal components of the inverter may reach temperatures of more than 80 degrees. Sun exposure will accelerate the aging of the internal components of the inverter. Over-temperature may also cause the inverter to derate, affecting the system's power generation.
Therefore, summer inverter operation and maintenance requires special attention:
(1) Handle the surrounding environment of the inverter to ensure the ventilation of the inverter.
(2) Keep the inverter away from the sun exposure area, you can choose to install it under the bottom of the component or under the eaves.
(3) Install a rainproof heat-dissipating cover on the top of the inverter partially exposed to sunlight.
Preventing the impact of thunderstorms on photovoltaic systems
Thunderstorms in summer have put forward higher requirements for the operation and maintenance of photovoltaic systems.
Thunderstorms may induce short-circuits on the line, especially on flat roofs or floors where drainage is poor. Rainwater immersion may also cause cable insulation performance to drop, causing the inverter to report failure and fail to generate electricity. Therefore, in the rainy days, we must do a good job in project drainage, and do cable wiring maintenance work. However, remember to avoid overhauling electrical equipment and wiring with your hands and guard against electric shock.
Lightning strikes can also cause system damage or even fire risk. The lightning protection problem should be fully considered at the beginning of the design of the photovoltaic system. In the daily maintenance of the power station in the summer, special attention should also be paid to checking whether the equipment for lightning protection is in good condition and whether the cable connection is complete. The lightning protection grounding of the inverter and other equipment, the lightning protection grounding hole connection of the component frame, the grounding of the bracket, and the lightning protection of the distribution box cannot be ignored.
Shadow obscuration caused by tree growth in summer
The effect of shadow occlusion on photovoltaic power generation Xiaozhi has always stressed that shadow occlusion can easily lead to hot spot effect, which seriously affects the photovoltaic system power generation efficiency.
Some power stations are installed in the autumn and winter seasons. Trees, weeds, etc. are in the period of withering. It is not easy to judge whether there is obstruction to the power station, and the occlusion is easy to occur after the summer vegetation is flourishing. In addition, it is prone to dust and bird droppings in summer, which requires maintenance personnel and the installation family to pay more attention to clean up in time to ensure efficient power generation.
Although photovoltaic power generation does not require continuous raw material input like thermal power, it still requires professional and meticulous operation and maintenance after one-time installation to ensure high power generation and high profit. The summer and autumn seasons are the prime time for power generation and the season of frequent risks. Do a good job in operation and maintenance, to prevent the adverse effects caused by thunderstorms, high temperatures, shadows, etc., in order to make power generation more profitable!