Reactive power demand and charging are important concepts in electrical power systems, particularly in the context of power quality, grid stability, and efficient energy management. Here’s an explanation of both: Reactive Power Demand Reactive power (measured in VAR, Volt-Ampere Reactive) is the power required by inductive or capacitive loads to sustain electromagnetic fields in devices...
Installing an Active Harmonic Filter (AHF) on the main power distribution line can typically save fuel consumption for generators (especially diesel generators) Here is a detailed explanation: How Harmonics Increase Fuel Consumption in Generators (Especially Diesel Generators): Additional Heat Losses: Harmonic currents flowing through the stator and rotor windings of the generator cause highe...
The Problem: Variable Speed Drives Generate Harmonics What is a Variable Speed Drive (VSD/VFD)?A Variable Speed Drive (VSD), also commonly called a Variable Frequency Drive (VFD) or Adjustable Speed Drive (ASD), is an electronic device that controls the speed and torque of an AC electric motor by varying the motor's input frequency and voltage. How Do They Cause Harmonics?The internal design of a ...
IN any system containing nonlinear loads that use phase-angle control or abrupt switching, particularly those that draw a non-sinusoidal current. The specific range of "2nd to 51st" is a classic signature of certain technologies.Here are the most common places where you would find such a wide harmonic spectrum: 1. The Classic Example: Thyristor-Controlled Reactor (TCR) in SVC Plants This is the mo...
The choice between installing an Active Harmonic Filter (AHF) on the power side (at the Point of Common Coupling - PCC) versus the load side (at the source of harmonics) is a critical design decision with significant technical and financial implications. Here is a detailed analysis comparing both installation strategies. Executive Summary Load-Side Installation (Local Compensation): Targets s...
Part 1: Power Distribution - The "Highway System" for Electricity Power distribution is the final stage in the delivery of electricity from the generation plant to the end-user (homes, businesses, industries). Think of it as the local and regional road network that brings goods from a central warehouse to your doorstep. Key Components of a Distribution System: Distribution Substations: Receiv...
Active Harmonic Filters (AHF): A Simple Guide to Cleaner Electricity Electricity is part of our daily life. It powers factories, schools, hospitals, shopping centers, and homes. Today, many devices such as computers, chargers, elevators, solar systems, and electric vehicles use advanced electronics. While these devices are useful, they can also make electricity “messy” and harder to co...
Modern power systems face a hidden threat: resonance. This occurs when harmonic currents from non-linear loads (like VFDs and rectifiers) match the electrical system's natural frequency. The result? Dangerous amplification of harmonic voltages and currents, leading to capacitor failures, overheating, and equipment damage. Traditional passive filters can ironically cause this problem by introducing...
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