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Increasing the electric power demand and restrictions in the power system expansion due to the high cost and environmental issues urge the utility companies to deploy the devices which will increase the level of the power to be transmitted on the existing transmission lines. Unified Power Flow Controller (UPFC) is the most versatile Flexible AC Transmission System (FACTS) devices which can be used...
The shunt FACTS devices like STATCOM are well adopted based on angle control structure. This control scheme allows a much better converter output voltage and line switching frequency (50/60 Hz). This paper will discuss the feasibility of enhancement in the operation region of these devices to accommodate the active power transfer. The concept will use general linear feedback method with single input...
In this paper, comparative evaluation between 4.5 kV, 4 kA GTO thyristor and IGCT for series connection in high power three-level Neutral Point Clamped (NPC) voltage source inverter applications is reported. Turn-off tests for GTO and IGCT are compared with RCD snubber at high dc voltage and current. Small RC snubber design is optimized and series connection issues for IGCT are addressed. Experimental...
Operation of today's very large scale and interconnected electric power systems depends critically on the devices that facilitate management of power flow on the grid. These devices can be based on passive components such as capacitor and inductor, or rely on the solid state power electronics technology to achieve much faster control bandwidth. Widely known as FACTS (Flexible AC Transmission system)...
Flexible AC transmission system (FACTS) applications are gaining more popularity and have been given a great impetus by the development of multilevel converters for high power applications. In this paper, a high power modular voltage source converter (VSC) is developed based on the newly developed emitter turn-off thyristor (ETO). In order to achieve this modular functionality, heat pipes are used...
A 200 MVA, 345 kV system control FACTS device, consisting of two 100 MVA converters, two 100 MVA high voltage series transformers inserted in 345 kV transmission lines and a 200 MVA shunt transformer, was tested and utilized on a 345 kV network. This device, namely convertible static compensator (CSC), has four basic configurations: static synchronous compensator (STATCOM), static synchronous series...
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