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delay compensator is finally shown for a wide range of signal transmission delays. The designed SVC controller shows a superior performance in damping the inter-area oscillations despite the signal transmission delays. KEYWORDS: power system damping, Static Var Compensator (SVC), Flexible AC Transmission Systems (FACTS), Phasor Measurement Unit (PMU), wide area measurement (WAM) 1. Introduction Electromechanical oscillation (0.1 to 2.0 Hz) is a phenomenon inherent to power systems [1]. There are mainly two types of electromechanical oscillations involved in power

in a Power System Network Baskaran Jeevarathinam Abstract The flexible AC transmission system (FACTS) in a power system improves the stability, reduces the losses, reduces the cost of generation and also improves the loadability of the system. In the proposed work, a non-traditional optimization technique, a Genetic Algorithm (GA) is conjunction with Fuzzy logic (FL) is used to optimize the various process parameters involved in introduction of FACTS devices in a power system. The various parameters taken into consideration were the location of the device, their

Enhancement Ramnarayan Patel, Vasundhara Mahajan, and Vinay Pant Abstract Power engineers are currently facing challenges to increase the power transfer capabilities of existing transmission system. Flexible AC Transmission system (FACTS) controllers can balance the power flow and thereby use the existing power system network most efficiently. Because of their fast response, FACTS controllers can also improve the stability of an electrical power system by helping critically disturbed generators to give away the excess energy gained through the acceleration during fault

Using Multi-Objective Optimal Power Flow and Genetic Algorithms," International Journal of Emerging Electric Power Systems: Vol. 7: Iss. 2, Article 1. DOI: 10.2202/1553-779X.1099 Optimal Allocation of FACTS Devices by Using Multi-Objective Optimal Power Flow and Genetic Algorithms Lucio Ippolito, Antonio La Cortiglia, and Michele Petrocelli Abstract The increases in power flows and environmental constraints are forcing electricity utilities to install new equipment to enhance network operation. Some application of Flexible AC Transmission System (FACTS) technologies

presented for the self-tuning of a voltage source converter (VSC) based Flexible AC Transmission Systems (FACTS) according to the prevailing system condition. L-index, which is a power system voltage stability status indicator, and its associated parameters are used to automatically regulate the modulation signal of the VSC. This will lead to a proportionate adjusting of the magnitude of the current injected into, or absorbed from, the interconnected load bus by the FACTS device. This regulating scheme will enhance seamless and optimal reactive power compensation by

turbine generator features may affect the system dynamics and participate in both voltage and frequency control and deviations. Furthermore, improving the reactive power limits of the system requires urgently a remedy for prevention of voltage’s instability and collapse. Analysis per- formed using PSAT prove that Flexible AC transmission System (FACTS) devices can be considered as efficient controllers for the growth of the system’s loadability margin that is tested by utilizing the Continuation Power Flow (CPF) technique. Compared to other controllers, the most

lines and/or extending of existing substations may be too costly and time- consuming, concessions for new rights-of-way may be hard or impossible to come by, and last but not least, there may be serious obstacles in the way from an ecological point of view [4]. From technical, economical and environmental points of view, there are two important -and most of the time combined- alternatives for building new transmission or distribution networks to enhance the transmission system capacity, and power quality: 1- The Flexible AC transmission systems (FACTS

the initiative to develop new Flexible AC Transmission System (FACTS) controllers and demonstrate their potential benefits in the operation of power system [3]. The addition of faster power electronics based devices to power systems, while providing control benefits, also means that higher-frequency interactions between these devices and the power system and among the devices themselves become more pronounced and the possibility of any adverse interactions needs to be carefully studied [4,5,6]. This paper is organized as follows. The theory of HVDC and SVC

conventional, economical and effective solutions is to install the power system stabilizer (PSS) [ 1 , 2 ]. However, the use of PSSs only may not be, in some cases, effective in providing sufficient damping for power oscillations, specifically for long-distance power transmission. An alternative solution is to use flexible AC transmission systems (FACTS) controllers. FACTS damping controllers are feasible due to the application of high-power electronic devices for power flow, voltage control and additionally enhancing the damping of power oscillations [ 3 ]. Among the FACTS

ac transmission systems (FACTS) devices [13,14]. In a coordinated control, a SMES is operated as the main apparatus to absorb or supply the required active power for a SSSC. Study results confirm that the frequency stabilisation effects of the coordinated SMES with SSSC are almost the same as those of two units of SMES (placed in each area). Besides, the MJ capacity of SMES in the case of the coordinated SMES with SSSC is drastically reduced in comparison to that of two units of SMES. On the other hand, system parameters variations, various load changes