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Jul 01,2026
APF and SVG are two important devices used in power systems to improve power quality. We frequently encounter them in our work; what are the differences between them, and what are their functions? 1.What is APF? The Active Power Filter (APF) is a specialized device for mitigating power harmonics, developed using modern power electronics and digital signal processing technology based on high-speed ...
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Jul 06,2026
Introduction In modern industrial, commercial and residential power grids, clean and stable sinusoidal voltage is the foundation for reliable operation of all electrical equipment. However, grid faults, nonlinear loads, switching operations and renewable energy integration constantly introduce various power quality issues. The waveform diagram clearly illustrates four most prevalent power quality ...
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Jul 16,2026
In industrial production, enterprises often face two major challenges: fluctuating production efficiency and persistently high electricity costs. Most of the time, managers attribute these problems to aging equipment and improper operation by personnel, overlooking a hidden killer lurking in the power system—harmonics. As "electrical pollution" in the power system, harmonics not only directly incr...
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Jul 17,2026
Are your factory's electricity bills skyrocketing? Are precision equipment breaking down unexpectedly? Are your transformers frequently overheating? Are you being fined by the power company for failing to meet power factor standards? These troublesome problems often point to the same root cause— power quality . In the field of power quality management, two star devices are frequently mentioned: SV...
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Jul 30,2026
I. Generation of Harmonics In power systems, the fundamental cause of harmonics is the presence of non-linear loads. When current flows through a load and does not maintain a linear relationship with the applied voltage, a non-sinusoidal current is formed, resulting in the generation of harmonics within the circuit. Due to the switching operations of semiconductor thyristors and the non-linear cha...
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