Cables
Understanding Underground Electric Transmission Cables
Underground cables have different technical requirements than overhead lines and have different environmental impacts. Due to their different physical, environmental, and construction needs, underground transmission generally costs more and may… Read more
Sep 21, 2011 | By Bipul Raman
High Voltage
Gas-Insulated Transmission Line – GIL
The gas-insulated transmission line (GIL) is a system for the transmission of electricity at high power ratings over long distances. In cases where overhead lines are not possible, the GIL… Read more
Jan 12, 2011 | By Edvard Csanyi
High Voltage
Basics Of Subtransmission Systems
Subtransmission systems are those circuits that supply distribution substations. Several different subtransmission systems can supply distribution substations. Common subtransmission voltages include 34.5, 69, 115, and 138 kV. Higher voltage subtransmission… Read more
Dec 17, 2010 | By Edvard Csanyi
Energy and Power
Historical Review of Power System Stability Problems
As electric power systems have evolved over the last century, different forms of instability have emerged as being important during different periods. The methods of analysis and resolution of stability… Read more
Dec 08, 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… Read more
Oct 23, 2010 | By Edvard Csanyi
