Connecting transmission systems with system intertie transformers
System intertie transformers connect extra high voltage (EHV) transmission systems with different voltages up to 800kV together with the purpose that active as well as reactive power can be exchanged… Read more
Sep 04, 2017 | By Edvard Csanyi
Three abnormal situations leading to an uncontrolled release of SF6 gas
This technical article deals with the assessment of risk to personnel in the case of an abnormal situation leading to an uncontrolled release of SF6 gas into the atmosphere. Generally… Read more
Jun 28, 2017 | By Edvard Csanyi
Generation of high voltages in the lab (AC/DC, switching and lightning impulse)
Benjamin Franklin – The man who dared to fly his kite in a thunder storm! In this technical article laboratory tests and test equipment needed to assess the performance of… Read more
May 29, 2017 | By Edvard Csanyi
Five protection relay types used to detect grid disturbances and isolating
Consider a medium voltage distribution system having local generation (e.g., captive power generation) as shown in figure 1 which is also synchronized with the grid. During grid disturbance, if plant generators… Read more
Mar 29, 2017 | By Edvard Csanyi
Consider this when planning high voltage switchgear installations
The following three criteria must be considered when planning high voltage switchgear installations: Voltage levels Plant concept and configuration Dimensioning High voltage installations are primarily for power transmission, but they… Read more
Dec 28, 2016 | By Edvard Csanyi
Gas insulated substation (GIS) versus Air insulated substation (AIS)
The metal-enclosed gas insulated switchgear> inherently follows the criteria for new substation design and offers a higher reliability and flexibility than other solutions. Due to the gas enclosed design, GIS… Read more
Dec 02, 2016 | By Edvard Csanyi
High voltage station – Design, construction and commissioning process
Having selected the right site location for high voltage station, the design construction and commissioning process would broadly follow the steps shown in Figure 1. Recent trends in utilities have… Read more
Nov 11, 2016 | By Edvard Csanyi
5 Serious Environmental Impacts Of HVAC Over HVDC Overhead Transmission Lines
The following discussion largely summarizes a paper by L. A. Koshcheev (2003) on the potential environmental impacts of HVDC overhead transmission lines in comparison to HVAC lines. In the paper,… Read more
Jun 20, 2016 | By Edvard Csanyi
Where Do We Use Arc Suppression Coil (Petersen Coil)?
The arc suppression coil (ASC), also known as Petersen coil, is used to compensate the capacitive earth fault currents supplied by outgoing feeders at a substation. The compensation can be… Read more
Jun 06, 2016 | By Edvard Csanyi
What would be the best solution for urban supply networks – AIS or GIS system?
This technical analysis was carried out by ABB to show that for urban supply networks the combination of HV gas insulated switchgear – GIS (due to their compactness and flexibility) and… Read more
May 23, 2016 | By Edvard Csanyi
5 good circuit schemes to avoid HV substation outage
High voltage substations are points in the power system where power can be pooled from generating sources, distributed and transformed, and delivered to the load points. Substations are interconnected with… Read more
Jan 02, 2016 | By Edvard Csanyi
Capacitive Voltage Transformers (CVT) For HV Measurements
Capacitive voltage transformers (CVTs) are used on higher voltage levels, starting from 66 kV and upwards. The type of the CVT is always a single-pole one, thus the connection is… Read more
Dec 26, 2015 | By Edvard Csanyi
7 Methods To Avoid Insulator Flashovers
Contamination caused insulator flashovers produce frequent outages in severely contaminated areas. Lines closer to the ocean are in more danger of becoming contaminated. Several countermeasures have been proposed to improve… Read more
Oct 14, 2015 | By Edvard Csanyi
FACTS Devices To Enhance Power System Performance
Flexible Alternating Current Transmission System (FACTS) simply refers to a combination of power electronics components with traditional power system components. They are intended to improve our power system reliability, power… Read more
Sep 28, 2015 | By sajna soman
Selection of high voltage conductors and earth wires
Conductors represent the most important component of an overhead power line because they have to ensure economical and reliable transmission and contribute considerably to the total line costs. For many… Read more
Feb 16, 2015 | By Edvard Csanyi