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Reactors
Published in Leonard L. Grigsby, Electric Power Transformer Engineering, 2017
Richard F. Dudley, Michael Sharp, Antonio Castanheira, Behdad B. Biglar
By varying the firing angle, α, of the thyristor controlled reactor (TCR), the amount of current absorbed by the reactor can be continuously varied. The reactor then behaves as an infinitely variable inductance. Consequently, the capacitive support provided by the fixed capacitor (FC) and by the thyristor switched capacitor (TSC) can be adjusted to the specific need of the system. The efficiency, as well as voltage control and stability, of power systems is greatly enhanced with the installation of SVCs.
Optimal Location of Static Var Compensator to Regulate Voltage in Power System
Published in IETE Journal of Research, 2023
Majeed Rashid Zaidan, Saber Izadpanah Toos
The SVC is a pioneer of FACTS devices that typically regulate and control the voltage magnitude by injecting/absorbing reactive power. The conventional configuration of the SVC is a combination of a constant capacitor in parallel with a Thyristor Controlled Reactor (TCR), as shown in Figure 1. The variable susceptance (BSVC) can be obtained from the total effective reactance (XSVC). On the other hand, the XSVC is calculated by the parallel combination of the capacitive reactance (XC) and TCR reactance (XTCR) [14]. where XL is the inductive reactance, and σ is the conduction angle.
Conformable Fractional Order Controller Design and Implementation for Per-Phase Voltage Regulation of Three-Phase SEIG Under Unbalanced Load
Published in Electric Power Components and Systems, 2022
In order to regulate the output voltage of SEIG, researchers employed different type of Flexible AC Transmission System (FACTS) such as synchronous condenser, Static VAr Compansator (SVC) and Static Synchronous Compensator (STATCOM). Despite the advantages of fast response and low harmonics generation, STATCOM has high investment costs. On the contrary, fixed-capacitor thyristor-controlled reactor (FC-TCR) which is a type of SVC has low investment costs and simple controllable structure. Moreover, it reduces power fluctuations. Taking the rural area conditions into account, FC-TCR can be preferred to regulate the SEIG’s output voltage because of its aforementioned advantages compared to the synchronous condenser and STATCOM [6]. Chermiti proposed a SEIG frequency regulator based on TCR circuit to compensate the reactive power [7]. They proposed a method for determining the appropriate excitation capacitor values required for various load conditions. Ahmed et al presented a study includes Static Volt Ampere Reactive Compensator (SVC) based SEIG voltage regulator [8]. A PI controller is used in this study to adjust the capacitance value of the SVC. The results prove the SVC's success in regulation of the output voltage of the SEIG in simulation and experiments.
Smart and coordinated allocation of static VAR compensators, shunt capacitors and distributed generators in power systems toward power loss minimization
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
Stevan Rakočević, Martin Ćalasan, Shady H. E Abdel Aleem
Controlling reactive power flow in the grid has been proven to impact the power system’s performance positively. In general, reactive power (VAR) compensation can be seen from two perspectives: load compensation and voltage support (Dixon et al. 2005). Devices used in VAR compensation are, in most cases, power electronic-based, connected in parallel or in series with the grid. Commonly used parallel (shunt) compensators are capacitor banks and SVC devices. Capacitor banks inject a fixed value of reactive power at the point of connection. SVC consists of a capacitor bank (fixed or variable) connected in parallel with a thyristor-controlled reactor. By adjusting the thyristor’s firing angle, we can achieve continuous control of the reactive power flow, from capacitive to an inductive mode, regulating bus voltages and reactive power flow in transmission lines.