Over de energiekwaliteit

Power quality (PowerQuality), strictly speaking, the main indicators for measuring power quality are voltage, frequency and waveform. In a general sense, it refers to high-quality power supply, including voltage quality, current quality, power supply quality and power quality. Power quality problems can be defined as: deviations in voltage, current or frequency that cause power equipment failure or malfunction, including frequency deviation, Spanningsafwijking, spanningsschommeling en flikkering, driefasige onbalans, onmiddellijke of tijdelijke overspanning, golfvormvervorming (harmonischen), spanningssagel, onderbreking, tijdelijke stijging en stroomvoorziening continuïteit .
An ideal power system should supply power to users at a constant frequency (50Hz) and a sinusoidal waveform at a specified voltage level (nominal voltage). In a three-phase AC power system, the voltage and current of each phase should be in a symmetrical state with equal amplitude and a phase difference of 120. Since the parameters of the system components (generators, transformers, lines, enz. .) zijn niet idealiter lineair of symmetrisch, de load -eigenschappen zijn verschillend en veranderen willekeurig, en vanwege de imperfecte besturingsmiddelen, werking, externe interferentie en verschillende fouten, is deze ideale staat niet in werkelijkheid, die tot verschillende problemen is gegenereerd in de werking van de Power Grid, elektrische apparatuur en elektriciteitsuitrusting en het concept van vermogenskwaliteit (vermogenskwaliteit) is ook gegenereerd.
In a general sense, power quality refers to high-quality power supply. But so far, there are still different understandings of the technical meaning of power quality. On the one hand, this is due to different perspectives. For example, power companies may simply regard power quality as the qualified rate of voltage (deviation) and frequency (deviation), and use statistics to illustrate that 9% of the power system Power voldoet aan de kwaliteitsvereisten; Power -gebruikers kunnen in het algemeen de energiekwaliteit beschouwen als de stroomvoorziening naar de belasting normaal is; and equipment manufacturers believe that qualified power quality means that the power supply characteristics fully meet the needs of the normal design conditions of electrical equipment, but in fact, the requirements for power supply characteristics of different manufacturers and different equipment may be far apart. On the other hand, the understanding of power quality is also constrained by the level of development of the power system, especially the performance and structure of power loads