Facts Controllers

Facts Controllers: The development of FACTS controllers has followed two different approaches. The first approach employs reactive impedances or a tap changing transformer with thyristor switches as controlled elements, the second approach employs self-commutated static converters as controlled voltage sources. In general, FACTS controllers can be divided into four categories. (i) series (ii) shunt (iii) […]

Principle Operation of Converters

Principle Operation of Converters: Principle Operation of Converters – Controllable reactive power can’be generated by dc to ac switching converters which are switched in synchronism with the line voltage with which the reactive power is exchanged. A switching power converter consists of an array of solid-state switches which connect the input terminals to the output […]

Flexible AC Transmission Systems

Flexible AC Transmission Systems: Flexible AC Transmission Systems – The rapid development of power electronics technology provides exciting opportunities to develop new power system equipment for better utilization of existing systems. Since 1990, a number of control devices under the term FACTS technology have been proposed and implemented. FACTS devices can be effectively used for […]

Difference Between SVC and Statcom

Difference Between SVC and Statcom: Difference Between SVC and Statcom may be noted that in the normal linear operating range of the V-I characteristic and functional compensation capability of the STATCOM and the SVC are similar. However, the basic operating principles of the STATCOM, which, with a converter based var generator, functions as a shunt-connected […]

Shunt Compensations

Shunt Compensations: Shunt Compensations are connected in shunt at various system nodes (major substations) and sometimes at mid-point of lines. These serve the purposes of voltage control and load stabilization. As a result of installation of shunt compensators in the system, the nearby generators operate at near unity pf and voltage emergencies mostly do not […]

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