Micro inverter of solar power generation system, and operation method thereof

Abstract

The invention discloses a micro inverter of a solar power generation system, and an operation method thereof. The method comprises the following steps: first of all, obtaining an output power value of a solar photovoltaic module, then, determining whether the micro inverter starts a power boosting mode, if the micro inverter starts the power boosting mode, boosting the maximum output power value of the micro inverter from a rated output power value to a maximum output power value, finally, determining whether the output power value of the solar photovoltaic module is greater than the maximum output power value, and if the output power value of the solar photovoltaic module is greater than the maximum output power value, the output power of the micro inverter being the maximum output power value. According to the invention, by use of the characteristic that the temperature of a solar battery itself and the maximum output power are negative temperatures, the solar photovoltaic module is enabled to output higher power when being operated in a low-temperature environment, the operation alternative of the power boosting mode is provided, the generating efficiency is improved, the generating cost is reduced, and the system application adaptability is enhanced.

Description

technical field [0001] The invention relates to a micro-inverter of a solar power generation system and an operation method thereof, in particular to a micro-inverter of a solar power generation system with a power boost operation mode and an operation method thereof. Background technique [0002] Since the two oil crises occurred in the 1970s and 1980s, the search and research of alternative energy sources has become one of the main policies of various important countries. Moreover, due to the rapid development of industrialization recently, the shortage of petrochemical energy has caused the price to rise, and another environmental problem derived is that excessive carbon dioxide emissions have caused the earth's climate to be abnormal and the temperature to rise. In order to effectively reduce the dependence on petrochemical energy, many renewable energy sources have emerged, such as solar energy and wind energy. Since solar energy is non-polluting, non-pollution-free, a...

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Problems solved by technology

[0006] Conversely, when the solar photovoltaic module 10A and the microinverter 20A operate at an ambient temperature of 0°C, the output power Pv of the solar photovoltaic module is 280 watts, however, the rated output power of the microinverter 20A is still When the output power of the solar photovoltaic module is 250 watts, although the output power Pv of the solar photovoltaic module increases due to the decrease of the ambient temperature, it is limited by the rated output power of the micro-inverter 20A, so the micro-inverter 20A can only output 250 watts

In other words, the output power that the solar photovoltaic module 10A can generate more than the rated output power of the micro-inverter 20A cannot be effectively and fully utilized, so in this case, the utilization rate of the output power Pv of the solar photovoltaic module will be reduced. Low

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