Micro inverter of solar power system and method of operating the same

摘要

A method of operating a micro inverter of a solar power system includes following steps: First, an output power value of a solar photovoltaic module is acquired. Afterward, it is to judge whether the micro inverter executes a power boosting mode. If the power boosting mode is executed, a maximum output power of the micro inverter is boosted from a rated output power value to a maximum output power value. Finally, it is to judge whether the output power value of the solar photovoltaic module is greater than the maximum output power value. If YES, the maximum output power value is outputted from the micro inverter.

主权项

1. A micro inverter of a solar power system, the solar power system having a solar photovoltaic module producing a solar photovoltaic module output power, the micro inverter comprising: a DC-to-DC converter configured to receive a DC voltage generated from the solar photovoltaic module, and produce a DC output voltage; a DC-to-AC converter configured to receive the DC output voltage, and produce a micro inverter output power; a temperature sensor configured to detect an ambient temperature around the solar photovoltaic module, and produce a temperature detection signal; and a microprocessor configured to receive the temperature detection signal and a power boosting signal; wherein the microprocessor is configured to correspondingly acquire an output power value of the solar photovoltaic module according to the temperature detection signal when the power boosting signal is enabled, and produce a first control signal to control the DC-to-DC converter and produce a second control signal to control the DC-to-AC converter, thus increasing an output power value of the micro inverter; the microprocessor comprising: a comparison unit configured to receive the temperature detection signal, and produce an output power comparison signal; a judgment unit configured to receive the output power comparison signal, the power boosting signal, and the output power value of the micro inverter to produce a driving signal; a first control signal generation unit configured to receive the driving signal, and produce the first control signal; and a second control signal generation unit configured to receive the driving signal, and produce the second control signal; wherein the driving signal is configured to control the first control signal generation unit or the second control signal generation unit to boost the maximum output power of the micro inverter from a rated output power value to a maximum output power value when the power boosting signal is enabled; when the output power value of the solar photovoltaic module is greater than the maximum output power value, the micro inverter is configured to output the maximum output power value; or when the output power value of the solar photovoltaic module is less than or equal to the maximum output power value, the micro inverter is configured to output the output power value of the solar photovoltaic module.