The PV grid-connected inverter power factor is a point that must be mentioned in the technical parameters. In the AC circuit, the cosine of the phase difference (Φ) between voltage and current is called power factor, which is represented by the symbol cosΦ, in terms of value, power. The factor is the ratio of active power to apparent power, that is, cosΦ=P/S. Generally speaking, the power factor of a resistive load such as an incandescent bulb or an electric resistance furnace is 1, and the power factor of a circuit having an inductive load is generally less than 1. When the power factor of the device is less than 0.9, it will be fined. The power factor output of the PV grid-connected inverter is required to be 1, and can be adjusted between 0.8 lead-0.8 hysteresis.
The PV grid-connected inverter power factor is a special concern for industrial and commercial distributed photovoltaic projects. It needs to be considered from the perspective of the system. It is necessary to consider not only the type and size of the load, but also the performance, test points and control methods of the reactive power compensation device. The operation of the entire photovoltaic system ensures that the system has normal working power.
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