What characteristics do synchronous motors provide in relation to power quality?

Synchronous motors are known for their ability to improve the power factor of a system. Power factor is an important aspect of power quality that reflects the efficiency with which electrical power is converted into useful work output. A motor that operates at a unity power factor (1.0) means that all the power supplied is being effectively used, minimizing wasted energy.

When synchronous motors are utilized in a system, they can operate at leading, lagging, or unity power factors, depending on the excitation level. By adjusting their excitation, synchronous motors can provide reactive power, compensating for inductive loads in the system, thus improving the overall power factor. An improved power factor not only enhances the efficiency of power delivery but also reduces losses in the electrical distribution system, leading to improved overall power quality.

The other choices do not accurately describe the primary advantages of synchronous motors in relation to power quality. For instance, decreasing system resistance is not a characteristic associated with synchronous motors directly impacting power quality. Similarly, while synchronous motors can be efficient, their performance at low speeds is generally not superior compared to other types of motors. Lastly, while reducing line losses is a benefit of improved power factor, it is not the primary characteristic indicative of synchronous motors directly; thus, this