Impact of voltage regulation on power system stability
Voltage regulation, by definition, is the percentage change in secondary voltage from no-load to full-load conditions. The regulation is customarily specified at a specific power factor, as the power factor… Read more
Nov 07, 2014 | By Edvard Csanyi
9 Most Common Power Quality Problems
The most common types of Power Quality problems are presented below along with their description, causes and consequences: Voltage sag (or dip) Very short interruptions Long interruptions Voltage spike Voltage… Read more
Oct 20, 2014 | By Edvard Csanyi
Distribution transformer calculations – MS Excel Spreadsheet
Distribution transformer calculations spreadsheet provides fast calculations for the following: Determining the MV/LV transformer rating, calculating overcurrent protection device rating on the low voltage side of the transformer, calculating the… Read more
Aug 23, 2014 | By Edvard Csanyi
Power factor correction calculations for power system – MS Excel Spreadsheet
Calculation formulas as follows: Q1 = I losses + Cu losses Q2 = PkW · (Tanφ1 – Tanφ2) I losses = 2% · Str Cu losses = USC% · Str Q = Q1 + Q2 Where:… Read more
Aug 08, 2014 | By Edvard Csanyi
What engineers should know about using conduits in power substation designs
There are several locations where conduit is used in power substation designs. The most common one considered is conduit used to provide cable access to equipment, such as breakers, transformers,… Read more
Jul 25, 2014 | By Edvard Csanyi
Power System and Substation Automation Guide
From experience, faults at transmission levels are less frequent than at distribution levels. At the same time distribution networks are not only complex, but the consequences of failure are quite… Read more
Jun 21, 2014 | By Edvard Csanyi
The role of medium voltage switchgear in power system
Most electrical appliances used in household, commercial and industrial applications work with low voltage. High voltage is used not only to transmit electrical energy over very large distances, but also… Read more
May 23, 2014 | By Edvard Csanyi
Complete LV/MV/HV power transformers guide
Siemens invented the voltage regulator in 1932 and pioneered its use in the United States. Voltage Regulators are tapped step autotransformers used to ensure that a desired level of voltage… Read more
Mar 22, 2014 | By Edvard Csanyi
Power Quality Problems and New Solutions
Power Quality (PQ) related issues are of most concern nowadays. The widespread use of electronic equipment, such as information technology equipment, power electronics such as adjustable speed drives (ASD), programmable… Read more
Feb 15, 2014 | By Edvard Csanyi
Comparison of major power grid failures in US and around the world (1)
The creation and delivery of power is one basic infrastructure expected by all modern industrial societies. Power distribution basics started in the US in the early 1900s when the first… Read more
Dec 25, 2013 | By Edvard Csanyi
An overview of the transmission and distribution network of New Zealand
The national grid has approximately 12,000 km of high voltage transmission lines. Most of the grid operates on alternating current (the HVAC system), although there is a direct current (HVDC)… Read more
Dec 06, 2013 | By Edvard Csanyi
Energy transmission and distribution guide
The purpose of the electric transmission system is the interconnection of the electric energy producing power plants or generating stations with the loads. A three-phase AC system is used for… Read more
Nov 30, 2013 | By Edvard Csanyi
Important in role of capacitors in distribution systems
Should the voltage on a circuit fall below a specified level for some reason, a device called a capacitor can momentarily maintain the voltage at line value. Basically, a capacitor… Read more
Nov 27, 2013 | By Edvard Csanyi
Load Shedding For Utility and Industrial Power System Reliability
Power systems are designed and operated so that for any normal system condition, including a defined set of contingency conditions, there is adequate generating and transmission capacities to meet load… Read more
Nov 16, 2013 | By Edvard Csanyi
The Need for Load Shedding In Generating, Transmission and Distribution Systems
The need for load shedding generally arises from unforeseen causes, lack of sufficient power supply from deficiencies in generating, transmission and distribution capabilities. These conditions may stem from unusually higher… Read more
Nov 11, 2013 | By Edvard Csanyi