Advanced state VAr generator employing GTO thyristors

An instantaneous reactive volt-ampere compensator and harmonic suppressor system

“…To satisfy the above criteria, the traditional methods of compensation consisting of switched capacitor or fixed capacitor and phase-controlled reactor coupled with passive filters have been increasingly replaced by new approaches utilizing the concept of synchronous link converters [1]. This new class of compensators, which has generated tremendous interest among the researchers, is known by several terminologies such as var generators [2], advanced static var generators [3], synchronous solid-state var compensators [4], pulsewidth modulation (PWM) inverter var compensators [5], etc. The Manuscript received November 7, 1996; revised August 25, 1997.…”

“…When SCSVC is utilized for harmonic compensation, it is known as an active power filter [6]- [10] or power line conditioner [21]. Several topologies of SCSVC and active power filters are reported in the literature, but most of them have noninstantaneous transient response [3]- [14]. The schemes based on indirect current control technique have a poor transient response [4], [5], [13].…”

Use of local bus measurements for operational planning of a power system

“…However, in recent years, static VAR compensators (SVS) employing thyristor switched capacitors and thyristor controlled reactors have been proposed [11][12][13] to generate or absorb the required reactive power of an interconnected power system. Also, the use of self-commutated PWM converters with an appropriate control scheme permits the implementation of static compensators capable of generating or absorbing reactive current components with a faster time response [14][15][16].…”

Dynamic compensation of reactive power in Various Faults in Power System

“…Static VAR compensator (SVC) and Thyristor controlled series compensator (TCSC) are some of the commonly used FACTS controllers, The developments in the field of power electronics, particularly Gate Turn-off (GTO) based devices, have introduced a new family of versatile FACTS controllers, namely static synchronous compensator (STATCOM), The STATCOM is one of the custom power devices that received much attention for improving system stability, with the development of power electronics technology, custom power devices play important role in bringing unprecedented efficiency improvement and cost effectiveness in modern electrical power system [1,2]. The custom power is relatively new concept aimed at achieving high power quality, operational flexibility and controllability of electrical power systems [3][4][5]. The possibility of generating or absorbing controllable reactive power with various power electronic switching converters has long been recognized [6][7][8].…”