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This paper presents an analytical model to provide a rapid estimation of the steady-state averaged power loss of a T-type STATCOM with Virtual Zero level Modulation (VZM) to balance the neutral point voltage. A case study is then conducted on a 54kVA rated T-type STATCOM system to investigate the power loss distribution over power devices and variations over switching frequency. A comparison is made...
In this paper the fundamental and advanced developments in shunt FACTS devices for modeling and control are reviewed. The voltage along a transmission can be controlled using shunt-connected FACTS controllers. More than sixty research publications have been classified and appended for a quick reference.
STATCOM is reactive power compensator based upon a voltage source converter which uses power electronic devices with turn-off capability as switching devices. Its main function is to support bus voltage of which it is connected to the system by providing quick response to supply or absorb reactive power. For damping power oscillations purpose, it is required to employ power oscillation damping (POD)...
Power system stability has become an important issue for secure and reliable operation of power system. This can be improved by using one of the key FACTS controllers, Static Synchronous Compensator (STATCOM) along with a damping controller. FACTS controllers are mainly used for controlling the reactive power flow on the line, but they can also be used for damping low frequency oscillations. This...
This paper presents a novel control of PV solar farm as a STATCOM (PV-STATCOM) coordinated with Power System Stabilizers (PSSs) for damping of electromechanical oscillations in a power system. A two-area power system with a 150 MW PV solar plant connected at the midpoint of the tie line is simulated in PSCAD/EMTDC software. During contingencies, the capacity of the PV inverter remaining after real...
This paper studies the impact of leveraging both static synchronous compensator (STATCOM) and power system stabilizer (PSS) on multi-machine power systems. Considering a standard IEEE 9-bus test power network, the classic and intelligent controllers are applied and analyzed to achieve a desirable system performance. Simulated tests show the usefulness of STATCOM on network power quality in terms voltage...
Coordinated design of the power system stabilizer (PSS) and static synchronous compensator controller parameters (STATCOM) using artificial bee colony algorithm (ABC) to improve power system stability as an optimizations problem has been proposed in this study. ABC algorithm is a collective intelligence based on optimization algorithm inspired by the feeding behavior of bees in finding food. Rapid...
The flexible alternating current transmission devices are becoming important in suppressing power system oscillations and improving system damping. This paper presents effects of STATCOM on damping torque and synchronizing torque in a power system. Base on principle of these two torques controller system is designed. The small signal stability analysis and characteristic of eigenvalues of the system...
This paper presents a small-signal model of a static synchronous compensator (STATCOM) in a simple single machine infinite bus system. The above model helps to investigate the effect of the change of the system parameters on system dynamics in a much simpler way. The non-linear model of a machine is linearized at different operating points and linear plant models are obtained. The STATCOM is modeled...
In this paper, optimal location and size of STATCOM are defined using voltage stability indices in terms of bifurcation and modal analysis to satisfy its primary application. Then, besides this primary application, a complementary functionality is defined in order to mitigate low frequency oscillations (LFOs). Hankel singular values (HSVs) and right half plane zeros (RHP-zeros) analyses are applied...
The stability of fixed-speed induction generator (FSIG)-based wind turbines can be improved by a StatCom, which is well known and documented in the literature for balanced grid voltage dips. Under unbalanced grid voltage dips, the negative sequence voltage causes heavy generator torque oscillations that reduce the lifetime of the drive train. In this paper, investigations on an FSIG-based wind farm...
In this paper a comparative performance of different FACTS-POD devices such as Static Var Compensator (SVC), Static Synchronous Compensator (STATCOM), Thyristor Controlled Series Capacitor (TCSC) and Static Synchronous Series Compensator (SSSC) with Power Oscillation Damper (POD) as supplementary controller is analyzed with respect to power oscillation damping capability, system loss reduction and...
The main issue considering power system security is how to reduce the overshoot and have better rate of damping of power system oscillations. Generally, Power System Stabilizer (PSS) are used for power system oscillation damping, but inter area oscillations are not effectively damped with PSS, so Flexible ac transmission system (FACTS) devices with supplementary controller are used for effective damping...
An adaptive second order sliding mode control strategy is proposed for of the Series Synchronous Static Compensator (SSSC) of the Unified Power Flow Controller (UPFC) which is installed in a multimachine power network penetrated with a Doubly Fed Induction Generator (DFIG) based wind power. The proposed controller utilizes the instantaneous power components of the SSSC instead of the conventional...
This paper presents a coordinated control of a STATCOM and a Power System Stabilizer (PSS) for damping the low frequency electromechanical oscillations in a single machine infinite bus (SMIB) system. A model is developed which is subsequently linearized to form a state space model. The STATCOM control is based on modulation index and the phase angle control through pulse width modulation (PWM) technique...
The contribution of this paper is the application of subspace system identification techniques to design a wide area controller for damping power oscillations. A state feedback linear control strategy based on model is proposed. The gains of the controller are obtained through a linear quadratic regulator (LQR) algorithm. The model is obtained through identification using available measurements of...
To improve power system stability in this paper, a method for optimal coordinate control of power system stabilizers (PSSs) and static synchronous compensator (STATCOM) is presented. The optimal coordinated control of multiple PSSs and STATCOM is transformed into an optimization problem in which both rotor angle speed deviation between generators and load voltages deviation after fault are involved...
This paper evaluates the effectiveness of FACTS controller in AC/DC network stability improvements during operational change offered at the interface bus. In general, HVDC links have been used since decades for long distance bulk power transmission and asynchronous interconnections. However, the expansion of load and generation at respective converter station domain keep on changing due to both industrial...
In this paper, the effectiveness of Static Var Compensator (SVC) and Static Compensator (STATCOM) on power system transient stability enhancement is assessed by implementing controller design theory. The main circuit configuration and models of the devices are introduced in the work. The paper proposes a control scheme to increase the system damping and improve the system response; then employs Differential...
In recent years, the microgrid has emerged as a promising concept and gained significant attention along with different renewable energy sources in the distribution network. Proper power coordination and strategic controller selection can extend the horizon of applications of the traditional microgrid system. This paper demonstrates the multi-operations from a single stage transformerless voltage...
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