Why Harmonic Current in Transformer Excitation Current?

Harmonics in the excitation current of Transformer is due to Hysteresis. As we know the relationship between Magnetic Flux Density, B and Magnetic Field Intensity, H is not linear as shown in figure below. Also, B = Flux (Ø) / Area (A), and H = NI where N = Number of turns and I = … Read more Why Harmonic Current in Transformer Excitation Current?

Why & When Consumer are Paid from Utility for Consuming Electric Power?

This seems amazing that Consumers are getting paid for consuming electric Power by electric Utilities. But it happens. In this post I will discuss how and when this situation occurs where consumers get paid for consuming electric power. The first thing to know about electricity is that it has to go somewhere. If it’s in … Read more Why & When Consumer are Paid from Utility for Consuming Electric Power?

Difference between Smart Grid and Conventional Power Grid

The main difference between the Smart Grid and Conventional Power Grid on the basis of the design idea is that Smart Grid is based on Demand Follows Supply while conventional grid on Supply Follows Demand. That means, the amount of coal dumped into a thermal power plant in some way depends on the estimated electricity demand … Read more Difference between Smart Grid and Conventional Power Grid

Smart Grid – An Overview

What is Smart Grid? A Smart Grid is an evolved Grid system that manages electricity demand in a sustainable, reliable and economic manner, built on advanced infrastructure and tuned to facilitate the integration of all involved. So tough definition? Let’s make it simple. Smart Grid is a Power Grid monitored and controlled electronically to maximize efficiency … Read more Smart Grid – An Overview

HVDC – Advantage & Disadvantage

A scheme diagram of HVDC Transmission is shown below for ease in understanding the advantages and disadvantages.     Advantages of HVDC: There is a list of advantages of High Voltage DC Power Transmission, HVDC when compared with High Voltage AC Power Transmission, HVAC. They are listed below with detail while comparing with HVAC. Line … Read more HVDC – Advantage & Disadvantage

Transformer Inrush Current

In this post we will discuss the Magnetizing Inrush Current in a Power Transformer. Magnetizing Inrush urrent in Transformers results from any abrupt changes of the magnetizing voltage. This current in transformer may be caused by energizing an unloaded transformer, occurrence of an external fault, voltage recovery after clearing an external fault and out-of phase … Read more Transformer Inrush Current