About Power Electronic Converters (Inverters)
Solar arrays produce direct current (DC) electricity when exposed to sunlight, yet most common loads in daily life need to be powered by an AC source, such as fluorescent lamps, televisions, refrigerators, fans, and air conditioners, as do most power machines.
Therefore, there is a need for a device that converts DC to AC, which is called an inverter.
Photovoltaic power generation system inverter is a current conversion circuit, its role is to the solar array issued by the DC power conversion into a variety of different requirements of frequency and voltage value of the AC power.
Inverter can be specifically divided into passive and active two kinds, passive inverter refers to the DC power through the inverter will be directly supplied to the load energy, active inverter refers to the DC power through the inverter to the AC power supply.
The necessity of DC to AC is also reflected in the power supply system needs to raise or lower the voltage, the AC system only need to add a transformer can be, and in the DC system technology and devices to be much more complex. Therefore, except for special users, inverters are required in photovoltaic power generation systems.
In addition, inverters have an automatic or manual voltage regulation function, which improves the power quality of the PV system. It is clear that inverters are an indispensable component of a PV system.
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