What is the power factor correction? Power factor correction (PFC) is a technique used to improve the power factor of an electrical system. Power factor is a measure of how effectively electrical power is being used. It is defined as the ratio of real power (measured in kilowatts, kW) used to perform work to the apparent power (measured in kilovolt-amperes, kVA) drawn from the power source. Power ...
In an electrical power system, harmonics basically means the multiples of the current or voltage at the fundamental voltage frequency. Whenever you look at a waveform and it's not the usual sinewave shape you expect, that means there are harmonics involved. What causes Harmonics? Well, AC signals can be divided into linear and nonlinear. The nonlinear systems draw power in short, sudden pul...
What is harmonic and how to manage it? Harmonics denote electrical quantities that possess frequencies which are integer multiples of the fundamental wave present in the current. This concept typically involves the Fourier series decomposition of periodic, non-sinusoidal electrical quantities. In this context, any electrical quantity with a frequency exceeding that of the fundamental wave, derived...
What is the reason for high neutral line current？ Neutral current primarily arises due to two factors: three-phase unbalance and harmonic currents. Three-Phase Imbalance In a three-phase four-wire power distribution system, the ideal scenario entails an even distribution of loads across all three phases. This balance ensures that the vector sum of the three-phase currents is z...
What are the power quality problems of broadband oscillation? Broadband oscillations in power systems refer to low-frequency oscillations that occur over a wide range of frequencies. These oscillations can have a significant impact on system stability and can lead to voltage instability, power quality issues, and even blackouts if not properly managed. Here are some of the characteristics of broad...
what are the effects of harmonics on electrical systems In the intricate realm of electrical engineering, harmonics emerge as a subtle yet influential phenomenon that can significantly impact the efficiency, reliability, and safety of electrical systems. These unwanted frequencies, riding alongside the fundamental power waveform, can wreak havoc on various components and overall system perf...
Development history of IGBTThe Insulated Gate Bipolar Transistor (IGBT) has revolutionized power electronics since its inception, marking a pivotal milestone in the development of high-efficiency energy conversion systems. Born in the late 1970s and early 1980s, the IGBT emerged as a hybrid semiconductor device that combined the advantages of Bipolar Junction Transistors (BJTs) and Metal-Oxide-Sem...
In today's rapidly advancing world, the reliability and quality of power have become more critical than ever. The interconnected systems and sensitive electronic devices of the modern digital economy require an almost perfect power supply. However, power quality (PQ) issues such as voltage sags, harmonics, and transients remain prevalent, posing significant challenges to utilities and end-users al...
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