Application Of Power System Stabilizer Research Articles

A Comprehensive Review of Power System Stabilizers

This paper presents a current literature review (from the years 2017–2022) on issues related to the application of power system stabilizers (PSSs) for damping electromechanical swings in power systems (PSs). After the initial selection of papers found in the databases used, over 600 publications were qualified for this review, of which 216 were subjected to detailed analysis. In the review, issues related to the following problems are described: applications of classic PSSs, applications of new stabilizer structures based on new algorithms (including artificial intelligence), development of new methods for tuning PSSs, and operation of PSSs in PSs with high power generation by renewable sources. Describing individual papers, the research methods used by the authors (simulations, measurement methods, and a combination of both) are specified, attention is paid to the waveforms presented in the papers, and reference is made to the types of PSs in which PSSs (large multimachine, reflecting real systems, smaller standard multimachine New-England type, and simplest single-machine) operate. The tables contain detailed comments on the selected papers. The final part of the review presents general comments on the analyzed papers and guidelines for future PS stability studies.

Dynamic Stability Control of Sudan National Grid Using Power System Stabilizer

Application of power system stabilizers (PSS), as supplementary control signals for the excitation system in order to damp the low frequency, generator angle, speed variation, generator power, voltage magnitude and power flow oscillations. This paper presents the application of robust decentralized power system stabilizer (PSS) design approaches, for Sudan power system which consists of 41 machines with 167 buses. The paper mainly focus on operator testing of robust decentralized control techniques for power systems, and the optimal control approach to robust control design. Results of robust decentralized control design approaches are defined by using state space model equations. Also for testing dynamic stability Lyapunov theorem is used. The simulations were carried out using symmetrical fault and results presented by Power System Analysis Toolbox, MATLAB.

Research on Analysis and Application of Power System Stabilizer for Safe Operation of Large Nuclear Power Units

As more and more large-scale nuclear power units (NPU) are put into operation, power system stabilizers (PSS) are important control means for units and power grids, which play an important role in the safe operation of NPU. In this paper, by analyzing the mechanism of accelerating PSS and the power regulation characteristics of NPU, the paper proposes a type selection of PSS for NPU. By analyzing the key technical requirements of the frequency link of the accelerating PSS, it proposes some test verification measures. Combined with the nuclear power plant reactor technical specification requirements, it studies the influence of the PSS on the nuclear island during the tuning test, and then proposes the technical conditions for the PSS setting test in NPU. In view of the large-scale use of semi-speed generators in NPU, it analyzes the effects between the torsional vibration frequency and PSS of semi-speed generators, and proposes new parameter settings and logic designs for PSS to solve similar problems.

Power System Stabilizer Application for Load Frequency Control in Hydro-Electric Power Plant

Renewable energy provides 20% of electricity generation worldwide. Hydroelectric power is the cheapest way to generate electricity today. It provides almost onefifth of the electricity in world. Hydropower is produced in more than 150 countries. The main objective of this paper is modelling and analysis of the effects of the power system stabilizer (PSS) for load frequency control (LFC) system in hydro-electric power plant to damp the frequency oscillations due to different load distributions. LFC is the mechanism by which the energy balance is maintained. PSS is used to increase the system positive damping. The results of small signal stability analysis have been represented employing eigenvalue as well as time domain response.

Application of Power System Stabilizer on Stability Studies

This paper discusses the effect of placing a power system stabilizer (PSS) at various generators for stability studies in a large power system. The damping control for the New-England 39-bus system was discussed. The effect of PSS in damping the electromechanical modes on different generator was studied. The PSS takes only a generator’s speed as input, and feeds it, after modification, to the voltage reference input of the generator’s excitation system. The results by placing a power system stabilizer on eight generators of the 39-bus system were found to be stable satisfactorily damped

Time-varying delays and their compensation in wide-area power system stabilizer application

Abstract The processing of time delays is one of the key challenges in the use of wide-area power system stabilizer (WPSS) in engineering. In this study, the various time delays and their sources in WPSS applications are analyzed and measured. Strategies to reduce these time delays and the data transmission delay jitter of phasor measurement unit (PMU) used in WPSS closed-loop control are also investigated. A predictive control scheme that addresses the problems caused by time-varying delays in practical WPSS closed-loop applications is proposed. The effectiveness of the proposed scheme is verified through simulation experiments of Guizhou Power Grid (GZPG) in Southwestern China using a real time digital simulator. Moreover, this novel scheme has the potential to be improved and used widely in many applications.

Simulation and Application of Power System Stabilizer on Power System Transient Stability

This paper introduces the working principle and the mathematical model of additional power system excitation control-Power System Stabilizer (PSS). Through established a typical single machine-infinite bus power system simulation model, we simulate the synchronous generator’s transient operational characteristics following a severe disturbance. The simulation results show that the PSS can not only effectively increase the system damping, but also improve operational characteristics of the generator, considerably enhance power system dynamic and transient stability.

Smart control techniques for design of TCSC and PSS for stability enhancement of dynamical power system

This paper deals with the simultaneous application of thyristor controlled series capacitor based damping controller and power system stabilizer for stability improvement of dynamic power system. The adaptive neuro-fuzzy inference system and Levenberg–Marquardt artificial neural network algorithm are used to develop the control strategy for thyristor controlled series capacitor based damping controller and power system stabilizer. The power system stabilizer generates appropriate supplementary control signal to an excitation system of synchronous generator to damp the frequency oscillations and improves the performance of the power system dynamic. The performance of power system affected due to the system configuration and load variation. In order to achieve the appreciable damping, the series capacitor is suggested in addition to the power system stabilizer. Nonlinear simulations of single machine infinite bus system are carried out using the individual application of power system stabilizer and simultaneous application of power system stabilizer and thyristor controlled series capacitor. The comparison analysis between conventional and smart control strategies based controllers is demonstrated. Single machine infinite bus system is tested under various operating conditions and disturbances to show the effectiveness of proposed control schemes.

Determination of PSS location based on singular value decomposition

In a multi-machine power system, it is important to determine the best location for the application of power system stabilizers. A technique based on singular value decomposition to identify generators that contribute in each oscillation mode is introduced. Measures based on singular value decomposition for controllability and observability for every mode are described and the selection of the best location for the installation of the PSSs is done according to these measures. The proposed methodology is designed to use the system transfer function. Studies illustrate the effectiveness of the proposed technique.

Relative gain array and singular value decomposition in determination of PSS location

In a multi-machine power system, it is important to determine the best location for the application of power system stabilizers. A number of techniques have been proposed to perform this selection. In this paper a new selection measure based on relative gain array and singular value decomposition is proposed. A comparison is made between the performance of the new measure and the older methods. The proposed methodology is based on the use of system transfer function. Copyright © 2005 John Wiley & Sons, Ltd.

Radial Basis Function Identifier and Pole-Shifting Controller for Power System Stabilizer Application

Use of a mixed structure consisting of a radial basis function (RBF) network and pole-shifting feedback controller for power system stabilizer application is presented in this paper. The RBF network is used to identify the time-varying parameters of the power system. The RBF has a simple structure with a nonlinear hidden layer which constructs local approximations to nonlinear input-output mapping and a linear output layer. The network is capable of fast learning and represents a nonlinear autoregressive moving average model with exogeneous inputs (NARMAX). The NARMAX model is transformed into a linear ARMA model every sampling period and the pole-shift controller is used to calculate the control signal. This process of linearizing a nonlinear system is important because of the widespread industrial acceptance of linear feedback controllers, availability of theoretical and practical results about robustness, and closed-loop stability. Simulation studies carried out on a single-machine infinite bus power system verify the effectiveness of the above approach.

Discussion of "The application of power system stabilizers to a multigenerator plant" [and reply

M.J. Gibbard et al. comment on the paper by G.J. Rogers (see ibid., vol.15, no.1, p.350-5, 2000). They discuss their application of a different design procedure to the author's four-machine infinite bus system. The original author replies to the comments.

The application of power system stabilizers to a multigenerator plant

The effect of power system stabilizers on the oscillatory modes of a generating plant, which consists of a number of equal, identical generators, is discussed. It is shown that the power system stabilizer design and the type of power system stabilizer input may alter the damping produced by the stabilizer on the exciter mode and the intra-plant electromechanical modes. A power system stabilizer which is designed to match the ideal phase lead over a wide frequency range is shown to add damping to plant, inter-area and intra-plant electromechanical modes. The exciter mode damping is shown to be reduced by power system stabilizers having frequency input.

Stability enhancement of a multimachine power system using fuzzy logic based power system stabilizer tuned through genetic algorithm

The paper presents a procedure for application of Fuzzy logic Power System Stabilizer (FPSS) for stability enhancement of a multimachine power system. The location of Power System Stabilizer (PSS) is determined using critical modes and participation factors for different operating conditions. A simple configuration is chosen for FPSS with a speed deviation of synchronous generator and its derivative as input signals. The parameters of the stabilizers are tuned through simulation of non-linear model of power system under chosen disturbance using Crowding Genetic Algorithm (CGA) to minimize a Root Mean Square Deviation (RMSD) index of the concerned state variable which maximizes the damping of the critical mode. Results obtained from a two area, five generator power system indicate the improved performance of FPSS over conventional PSS.

Adaptive PSS with Radial Basis Function Network Identification and Pole-shift Control

This paper deals with the application of daptive power system stabilizers to provide supplementary excitation control signal for improved power system operation. The proposed methodology includes a radial basis function (RBF) network for identifying the system characteristics in an on-line mode and a pole-shifting (PS) control methodology to compute the control signal. In the proposed RBF structure, the weights correspond to the system parameters. This overcomes the “black-box” like description of the ANN models proposed in the literature and provides insight into the operation of the RBF model. This new technique has several advantages with regard to modeling, training and stability making it attractive for on-line applications. Simulation studies on a single-machine infinite bus power system verify the effectiveness of the above approach.

Application of neural adaptive power system stabilizer in a multi-machine power system

Application of a neural adaptive power system stabilizer (NAPSS) to a five-machine power system is described in this paper. The proposed NAPSS comprises two subnetworks. The adaptive neuro-identifier (ANI) to dynamically identify the nonlinear plant, and the adaptive neuro-controller (ANC) to damp output oscillations. The backpropagation training method is used online to train these subnetworks. The effectiveness of the proposed NAPSS in damping both local and inter-area modes of oscillations and its self-coordination ability are demonstrated.

Application of an energy source power system stabilizer on the 10 MW battery energy storage system at Chino substation

Southern California Edison (SCE) installed a 10 MW battery energy storage system (BESS) at its Chino substation facility in 1988. The BESS facility has been in operation for six years and has been used for load leveling and peaking functions. The BESS power conversion system was built with the then state of the art technology and has a very fast response rate when changing power output of the batteries. SCE installed an energy source power system stabilizer (ESPSS) to test the concept of providing damping of power system swings using the ESPSS. The ESPSS basically modulates the power output/input of the energy storage batteries to respond to system frequency deviations caused by power system oscillations. The ESPSS differs from a conventional power system stabilizer. It is designed to change the power output of the power source rather than the voltage or the reactive power output. While installing the ESPSS several upgrades to the BESS were made to improve reliability. Installation of the ESPSS on the battery enables SCE to test the concept of system stabilization using power source output modulation instead of reactive power modulation. The energy storage batteries provide an easy test bed for conducting field tests and response of the ESPSS to system disturbances. This paper discusses the BESS, the ESPSS and presents recorded results from system disturbance monitoring and field tests conducted on the ESPSS and the batteries.

Techniques for Stabilizing Interarea Oscillations in Power Systems

Eigenanalysis and frequency domain techniques are jointly used on the analysis of interarea modes in multiarea power systems, aiming at the selection of the most effective machines for coordinated application of power system stabilizers and the most effective signals to be used to damp out the interarea oscillations. Couplings among generators of a same area or of different areas in the range of frequency of interarea modes, affecting their stabilization, are analyzed. Emphasis is given to decentralized control, but the most effective remote signals are also analyzed.

Application of power system stabilizer at Bandar-Abbas power station

Power system instability as a result of high power generation of one of the largest plants of the Iranian electric power grid prevented the plant to be fully utilized. PSSs were installed on the generating units of the power station to improve its small signal stability and enhance the stable generation limit. Domain separation and pole assignment techniques were applied for the PSS design. Several field tests were also carried out to verify its effectiveness. This paper presents the PSS tuning procedure, including the design criteria and some of the field test results.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Stability investigation of a longitudinal power system and its stabilization by a coordinated application of power system stabilizers

This paper presents the results of a stability investigation of a power system with longitudinal structure and its stabilization by coordinated power system stabilizers (PSSs). The effects of the existing controllers on system stability are studied. If no PSSs are present, the damping of various swing modes in the system will be very poor and low frequency oscillations present. Eigenvalue analysis shows that the undamped modes are sensitive to excitation control while speed governors have little influence on damping. In order to enhance the overall system stability through excitation control, a coordinated design procedure for power system stabilizers has been developed based on generation coherency, total coupling factor and nonlinear simulation. A PSS designed using this procedure is robust to different operating conditions and very effective for damping oscillations. Comprehensive simulation studies were conducted and results are presented. >