The incorporation of electronic power equipment is a reality due to the advantages such equipment offers in regards to energy savings and easiness of regulation, that is comfort.
Among these systems, it is worth emphasising all those that regulate or convert some type of electrical magnitude such as UPS, variable speed drives, soft starters, dimmers, PCs, etc.
Along with the energy-related advantages of these systems, their use generates high frequency and harmonic currents, as well as current leakages to ground, thas is a bad waveform quality.
Nonetheless, it is important to distinguish between electric power quality supply and waveform quality. It allows to know the origin of the disturbances.
- The former makes reference to how the utility supply the voltage (interruptions, sags, overvoltages, etc.)
- The latter, waveform quality, makes reference to how the user uses the current, which then affects the voltage. In this case, appear the problems derived from harmonic currents and high frequencies generated by the above mentioned equipment.