What will affect the "power factor"?

Here are some possible factors that may affect the power factor:
Load type: The presence and proportion of inductive loads (such as motors and transformers) and capacitive loads (such as capacitors) will have an impact on the power factor. For example, in a factory dominated by motors, there are more inductive loads, which may lead to a decrease in the power factor.
Reactive power in the circuit: The magnitude of reactive power is directly related to the level of the power factor. When the reactive power is large, the power factor will decrease. For instance, in long-distance transmission lines, reactive power is generated due to the presence of inductance and capacitance.
Power supply quality: Factors such as voltage fluctuations and harmonic content of the power supply may also affect the power factor. If the harmonic content in the power supply is too high, it will make the power factor worse.
Operating status of equipment: Overload, underload, or abnormal operation of equipment may all change the power factor. For example, when a motor is operating under light load, the power factor is usually low.