Event & Blog

The rapid growth in electronic devices in recent years has significantly changed the types of loads connected to the electrical distribution system. Not long ago, the primary concern when using electricity was simply the voltage, ensuring that equipment and devices operated correctly.

This article aims to help engineers understand the nature, causes, and types of harmonics, as well as the equations and sequences involved, and provides guidance on how to mitigate the effects of harmonics.

Power quality refers to the power grid's ability to provide a consistent and reliable flow of clean power. The power flow should have a pure sinusoidal waveform and it should remain within specified voltage and frequency tolerances. But why is good power quality necessary?

In modern industries, maintaining the quality of electrical power is paramount for operational efficiency. One of the major challenges in achieving high-quality electrical systems is the presence of harmonic voltages and the need for improving power factor.

Last Saturday, the Seiwajyuku Book Club organized by YT Electric Co., Ltd. concluded with enthusiastic discussions. The session focused on the works of Kazuo Inamori, with the theme "To Succeed, You Must Have a Strong Desire."

In power systems, capacitor banks and active harmonic filter (AHF) are often used to improve power quality and efficiency. However, the interaction between these devices can sometimes lead to resonance, which can amplify harmonics and cause various power quality issues.

High Total Harmonic Distortion of Voltage (THDV) can be caused by various factors in an electrical system. Understanding these causes is crucial for identifying and implementing effective mitigation strategies

Using a power quality monitor to do preventive maintenance surveys and/or after-the-fact investigations requires the knowledge of Ohm’s and Kirchoff’s Laws. 

The effect of distribution feeder and substation capacitor banks on harmonic resonance and frequency response characteristics was studied for the system.

Power quality refers to the quality of AC power delivered to users through the public power grid. Ideally, the grid should provide power at a constant frequency, with a sinusoidal waveform and standard voltage.