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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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Aug 19,2026
In power quality management, different voltage levels often require different harmonic mitigation strategies. In low-voltage systems, Active Harmonic Filters (AHFs) are widely used because they offer flexible and precise harmonic compensation. However, when it comes to medium- and high-voltage power systems, passive Filter Capacitor (FC) systems remain a more common and practical solution. So, why...
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Aug 26,2026
Variable Frequency Drives (VFDs) have become essential in modern industrial systems. They provide accurate motor speed control, reduce mechanical stress, and can significantly improve energy efficiency. However, there is another side of VFD technology that is often underestimated: harmonic distortion. In low-voltage distribution systems, a large number of VFDs can become an important source of har...
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Aug 28,2026
With the advancement of industrial automation technology, variable frequency drives (VFDs) are becoming increasingly widespread, garnering growing acclaim for their excellent speed-regulation capabilities and significant energy-saving effects. However, the harmonics generated during their operation pose an increasingly serious threat to the power grid; consequently, the need to suppress harmonic i...
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