Effect of Load Model on Damping of Oscillations in Power Systems (original) (raw)

Improved Dynamic Load Model for Power system Stability Studies

1982

The behavior of the load model in At present the load representation in typical power' system stability studies has been shown by stability programs is limited to a static load model various investigators to be a very important factor where the load is represented as constant MVA, in determining the stability of power system constant current, constant impedance, or some com

Effects of load dynamics on power system damping

IEEE Transactions on Power Systems, 1995

This paper explores the interaction between dynamic loads and power systems. Based on a generic model of dynamic loads, the frequency response of such load is discussed. Also, the frequency response of the system is investigated. It is shown that the dynamics of the load provide a feedback path which can influence the dam ing of the modal oscillations of the system. This i d u e n c e is very dependent on load parameters as well as the system conflquration. Under some circumstances damping can be improved, but under other conditions dynamic load may cause a decrease in damping.

Power System Dynamics and Stability

Power System Stability is investigated by simulating a set of critical contingencies to determine whether the disturbances information to classify system states. Low frequency power oscillations that occur between remote generating pools or power stations, due to different types and settings of the automatic voltage regulators at different power stations. This review paper presented a basic concept of power system stability, classification stability of power system, dynamic Stability, how to assessment the transient stability by using several methods to achieve dynamic and transient stability enhancement and modulate the power system.

Simulation Techniques of Electrical Power System Stability Studies Utilizing Matlab/Simulink

International Journal of Engineering Sciences & Research Technology, 2014

Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities. Maintaining synchronism between different parts of power system (PS) is getting difficult over time. The fact that growth of interconnected system is a continuous process, also these systems have been extended in different regions. In this research work steady state (SS) and transient stabilities along with swing equation and numerical solution using MATLAB / Simulink are studied. This work is done in two steps. In the first step, proper assumptions are made to linearize the system and then, the transfer function models of this system are developed for stability analysis. The performance of proposed linearized model of synchronous machine during normal and disturbed conditions is focused in Matlab/Simulink. This gives the understanding of the transient and dynamic analysis of PS stabilities.

Stability Study of Power System

The theory of power system stability, necessary of power system stability and different methods for analysis of power system stability has been developed in this paper. The objective of this paper is to investigate and understand the stability of power system, with the main focus on stability theories and power system modeling. The paper first explained the definition of power system stability and the need for power system stability studies. Next the paper examined the concept of system stability and some stability theories. The paper then performed a power system modeling and simulation of a twomachine, three bus power systems. The performance of the power system was simulated. The operating points and system parameters were varied to test the robustness of the power system. From various stability systems, in this paper, only transient analysis is studied. Examples of the parameters that were varied include the fault position λ, the power angle δ and the mechanical power input Pm . A software using MATLAB has been developed for this purpose. Finally we compare various stability responses by varying power angle, fault position and mechanical power.

Investigation of the Damping of Electromechanical Oscillations Using Power System Stabilizers (PSS) in Nigerian 330 kV Electrical Network

Electrical and Electronic Engineering, 2012

The study simu lated the behaviour of power system stabilizer (PSS) on automatic voltage regulator (A VR) and excitation system. It also developed an algorithm to investigate the transient and dynamic stability of the power systems. This was with a view to providing informat ion of damping rotor oscillations of synchronous generators. Three types of power systems were investigated: a single-machine-infinite-bus system with and without PSS, two generators connected to a load with various types of excitation controls and a mult imachine power system typified by Nigerian 330-kV electrical network. Tabu-search technique was used to tune the PSS-parameters for a single machine connected to an infinite bus operating at three different loading conditions. The objective function allowed the selection of the stabilizer parameters to optimally place the closed-loop eigenvalues in the left-hand side of a vertical line in the complex s-plane. The effectiveness of this suggested technique was confirmed through eigenvalue analysis. Time-do main simulat ions were also carried out on two generators connected to a load using MATLAB/Simu lin k. Two types of PSS were used for these simulat ions: generic and mult iband. The power systems were subjected to a balanced three-phase fault (most severe fault). The investigation was further extended to Nigerian 330-kV electrical network.

Power System Dynamics: Stability and Control

2008

About The Authors. Preface. Acknowledgements. List of Symbols. PART I: INTRODUCTION TO POWER SYSTEMS. 1 Introduction . 1.1 Stability and Control of a Dynamic System. 1.2 Classification of Power System Dynamics. 1.3 Two Pairs of Important Quantities: Reactive Power/Voltage and Real Power/Frequency. 1.4 Stability of Power System. 1.5 Security of Power System. 1.6 Brief Historical Overview. 2. Power System Components. 2.1 Structure of the Electrical Power System. 2.2 Generating Units. 2.3 Substations. 2.4 Transmission and Distribution Network. 2.5 Protection. 2.6 Wide Area Measurement Systems. 3. The Power System in the Steady-State. 3.1. Transmission Lines. 3.2. Transformers. 3.3. Synchronous Generators. 3.4. Power System Loads. 3.5. Network Equations. 3.6. Power Flows in Transmission Networks. PART II: INTRODUCTION TO POWER SYSTEM DYNAMICS. 4. Electromagnetic Phenomena. 4.1. Fundamentals. 4.2. Three-Phase Short-Circuit on a Synchronous Generator. 4.3. Phase-to-Phase Short-Circuit. 4....

CSEIT1846206 | Stability Analysis on Power System

Stability is an important constraint in power system operation and control .The transient stability is an important aspect in designing and upgrading electric power system. This paper presents the concept of power system stability, reasons for instability and the transient state stability analysis of power system is done using the capacitor bank and induction motor model in the MATLAB/SIMULINK environment. By adding capacitor bank reactive power is improved which in turn enhances the active power of the system. The instability caused by the induction motor is also analysed in this paper.