Power calculation of solar panels in distributed photovoltaic power stations
Sep 07, 2018
The distributed solar power generation AC power generation system is composed of a solar panel, a charging controller, an inverter and a battery.
The solar DC power generation system of a distributed solar photovoltaic power station does not include an inverter. In order to enable the distributed photovoltaic power plant solar panels to provide sufficient power for the load, it is necessary to select the components according to the power of the electrical appliances. The following is a solar panel power calculation method for distributed photovoltaic power plant solar panels with 100W output power and 6 hours per day for example.
First calculate the watt-hours consumed by the solar panels of the distributed photovoltaic power station (including the loss of the inverter): If the conversion efficiency of the inverter is 90%, then when the output power is 100W, the actual need is The output power should be 100W/90%=111W; if it is used for 5 hours per day, the power consumption is 111W*5 hours=555Wh. 2. Calculate the solar panel: Calculate according to the daily effective sunshine time of 6 hours, and consider the charging efficiency and the loss during charging. The output power of the solar panel should be 555Wh/6h/70%=130W. 70% of them are the actual power used by solar panels during charging.
The accumulation of dust on the surface of photovoltaic modules generated by distributed solar photovoltaics will affect the intensity of solar radiation radiated to the surface of the panels, as well as the output power of distributed solar photovoltaic solar panels. According to relevant literature reports, this factor will have a 7% impact on the output of the PV module. The analysis of the solar panel output power should take into account the impact coefficient of 0.93. Due to the non-uniformity of solar radiation, it is almost impossible for the output of the photovoltaic module to reach the maximum power output at the same time, so the output power of the photovoltaic array is lower than the sum of the nominal powers of the individual components.
