Energy and Power
Harmonic Distortion
Harmonic distortion is caused by nonlinear devices in the power system. A nonlinear device is one in which the current is not proportional to the applied voltage. Figure 1 illustrates this concept by the case of a sinusoidal voltage applied… Read more
Nov 23, 2010 | By Edvard Csanyi
Energy and Power
Battery monitoring and maintenance guidelines
Battery monitoring has become a very popular topic, and many companies have either purchased equipment or are in the process of evaluating these systems. This article discusses why monitoring is important, and what parameters must be monitored. A brief explanation… Read more
Nov 21, 2010 | By Edvard Csanyi
Electrical Lectures
The Need for Reactive Power Compensation
Except in a very few special situations, electrical energy is generated, transmitted, distributed, and utilized as alternating current (AC). However, alternating current has several distinct disadvantages. One of these is the necessity of reactive power that needs to be supplied… Read more
Nov 19, 2010 | By Edvard Csanyi
High Voltage
ABB – 145kV Compact indoor substation with Disconnecting CB
Turnkey 145 kV S/S project for Borlänge Energi, Sweden, emphasizing the advantages of ABB Disconnecting Circuit Breakers. Small footprint enables indoor air insulated Switchgear solutions, increasing the power substation availability and reliability for the customer. As a complement to the… Read more
Nov 15, 2010 | By Edvard Csanyi
Protection
Distance Relays
Distance relays respond to the voltage and current, i.e., the impedance, at the relay location. The impedance per mile is fairly constant so these relays respond to the distance between the relay location and the fault location. As the power… Read more
Nov 12, 2010 | By Edvard Csanyi
High Voltage
Gas-Insulated Substations – GIS
A gas-insulated substation (GIS) uses a superior dielectric gas, SF6, at moderate pressure for phase-tophase and phase-to-ground insulation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in SF6 gas inside grounded metal enclosures. The… Read more
Nov 10, 2010 | By Edvard Csanyi
Lighting
Emergency lights
Indepandant emergency supply Many buildings must have some form of emergency lighting to come on if the electric supply to the ordinary lights fails. BS 5266: Emergency lighting, BS EN 1838, BS 5266–7: Lighting applications. Emergency lighting are the codes… Read more
Nov 10, 2010 | By Edvard Csanyi
Transformers
Oil-Filled, Inert-Gas System
A positive seal of the transformer oil may be provided by an inert-gas system. Here, the tank is slightly pressurized by an inert gas such as nitrogen. The main tank gas space above the oil is provided with a pressure… Read more
Nov 08, 2010 | By Edvard Csanyi
Energy and Power
What is the cost of electricity?
Electrification in the early 20th century dramatically improved productivity and increased the well-being of the industrialized world. No longer a luxury – now a necessity – electricity powers the machinery, the computers, the health-care systems, and the entertainment of modern… Read more
Nov 02, 2010 | By Edvard Csanyi
Energy and Power
Short-Circuit Electrical Currents
A short circuit is one of the major incidents affecting electrical systems. The consequences are often serious, if not dramatic: Short circuit disturbs the system environment around the fault point by causing a sudden drop in voltage, It requires a… Read more
Oct 28, 2010 | By Edvard Csanyi
Medium Voltage
Aluminum vs. Copper: Conductors in Low Voltage Dry Type Transformers
In North America, aluminum is the predominant choice of winding material for low-voltage, dry-type transformers larger than 15 kilovolt-amperes(kVA). In most other areas of the world, copper is the predominant winding material. The primary reason for choosing aluminum windings is… Read more
Oct 27, 2010 | By Edvard Csanyi
Solar Power
Generating Power In The Future – Solar Wind Power
As the world discovers new ways to meet its growing energy needs, energy generated from Sun, which is better known as solar power and energy generated from wind called the wind power are being considered as a means of generating… Read more
Oct 24, 2010 | By Edvard Csanyi
Energy and Power
Power System Stability
Power system stability is the ability of the system, for a given initial operating condition, to regain a normal state of equilibrium after being subjected to a disturbance. Stability is a condition of equilibrium between opposing forces; instability results when… Read more
Oct 23, 2010 | By Edvard Csanyi
Cables
Types of Underground Lines
There are two methods of installing underground lines. In the first method, underground raceway systems (ducts) are installed below grade and then cable is pulled through them. Ducts may or may not be provided with concrete encasement. The second method… Read more
Oct 22, 2010 | By Edvard Csanyi
News
Introducing EEP
Hi to everyone, we are working hard on EEP, which is by the way supported by CsanyiGroup – also electrical engineering portal. Content will be similar like CsanyiGroup’s, but with much more style and funcionality. So far, we will first… Read more
Sep 16, 2010 | By Edvard Csanyi
