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Archive: Category «Transmission and Distribution»

Energy and Power

Flexible AC Transmission System – What and Why?

Flexible AC Transmission System (FACTS) have been evolving to a mature technology with high power rating. This technology has wide spread application, became a top rate, most reliable one, based… Read more

Dec 05, 2011 | By Edvard

Flexible AC Transmission System - What and Why?
Transmission and Distribution

What is the reason beyond three phase transmission?

As the need for increased transmission line capacity have forced power utility and owner to maximize power density in existing transmission corridors.  Many experienced have already been done on this,… Read more

Nov 28, 2011 | By Edvard

Three-phase electric power systems
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

Underground XLPE cables left to right: 345 kV, 138 kV, 69 kV, and distribution
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

Gas-Insulated Transmission Line - GIL
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

Transmission Lines
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

Historical Review of Power System
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

power-system-stability-2


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