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Non-local measurements from wide area measurement systems can be used to synthesize feedback signals for FACTS or HVDC based power oscillation damping controllers. Although non-local feedback signals may have better damping influence than local feedback signals, they involve greater complexity and reduced robustness due to the possibility of partial or complete loss of communication. A composite control...
This paper presents grey wolf optimization(GWO), which is a recently reported novel meta-heuristic optimizer, applied to optimize the damping controller parameters for a unified power flow controller connected to a single machine infinite bus power system for power oscillation damping. In this work the proposed GWO algorithm is compared with PSO algorithm in terms of convergence rate and computation...
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...
This paper presents the implementation of three different types of Power System Stabilizers (PSS) anda Static Var Compensator with a supplementary Phasor Power Oscillation Damper (POD) control for real-time simulation. The Klein-Rogers-Kundur model is used as test case and the PSS and Phasor-POD's performance is evaluated for both large and small disturbances. Modeling is performed in the MATLAB/Simulink...
Inter-area power oscillations damping is of fundamental importance in today's era of sophisticated and highly complex smart grids. The present paper demonstrates a practical solution obtaining satisfactory performance in damping power system oscillations utilizing the flexible VSC-HVDC transmission technology in an optimal combination with a power oscillation damping (POD) controller, utilizing active...
In this paper a static synchronous series compensator (SSSC) is used to improve the small signal stability of a power system. A 48-step voltage source inverter (VSI) is used for the implementation of SSSC. The PI controller is used to regulate the dc link voltage of VSI. The mathematical model is derived for complete power system including PI and damping controller. The PI and damping controller parameters...
This paper presents a Multi Input Single Output (MISO) Modal Linear Quadratic Gaussian (MLQG) Power Oscillation Damping (POD) controller for Voltage Source Converter based HVDC systems. Applying this technique to a small (four machine) test network incorporating parallel HVDC/AC transmission has lead to improved damping of electromechanical modes compared with a traditional Power System Stabilizer...
Selection of proper feedback signal for power system damping controller is vital to enhance its performance. In this paper, three different methods are evaluated to select the most effective signal to damp power system oscillations. The damping is obtaining by modulating power electronic device of the system. It is shown that how different feedback signal affects the performance of power system damping...
This manuscript presents an analysis of the dynamic performance of a multimachine power system with the presence of Thyristor Controlled Series Capacitor (TCSC) device working in set with additional controllers. The Power Sensitivity Model (PSM) is used to represent the multimachine power system. The design of Power Oscillation Damping (POD) and Power System Stabilizers (PSS) controllers is accomplished...
Wide-area measurements have been proposed to coordinate generator excitations and Static Var Compensator (SVC) auxiliary controls. The wide-area coordinating controller (WACC) utilizes remote signals to compensate the interactions between SVC and generator variables, therefore it provides an additional damping of both local and inter-area oscillations. However time delays introduced by remote measurement...
In this paper, the application of Interline Power Flow Controller (IPFC) in damping of low frequency oscillations is investigated. An extended Heffron-Phillips model of a single machine infinite bus (SMIB) system is used to analyze the damping torque contribution of the IPFC in power systems. The potential of various IPFC control signals upon the power system oscillation stability is investigated...
The main objective of this work is to analyze the ability of FACTS devices like TCSC and UPFC to damp low frequency oscillations and a POD controller is also included. A comparative study of damping effect of those devices is carried out. The power sensitivity model (PSM) is used to the representation of the electric power system. Sensibility analysis using the residue method shows the best place...
This paper first describes what kind of inter-area oscillations there exist in the Nordic power system and in what kind of situations they affect the power transfer capacity. The paper also describes the actions already taken in order to improve the damping of the oscillations and the efforts at online-monitoring of the damping level. The results of a two yearpsilas monitoring period imply that one...
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