Showing papers on "Power system simulation published in 1980"

Coordinated Application of Stabilizers in Multimachine Power Systems

Abstract: This paper addresses the problem of the most effective selection of generating units to be equipped with excitation system stabilizers in multimachine systems which exhibit dynamic instability and poor damping of several inter-machine modes of oscillation. Practical means have been developed using eigenvalue analysis techniques to guide the selection process. The linear state space matrix is derived directly from perturbation of the states of a large scale power system dynamic simulation and a subset of this matrix is used to yield the sensitivity of damping ratios of eigenvalues to stabilization measures in individual machines.

Evaluation and Improvement of Electromechanical Oscillation Damping By Means of Eigenvalue-Eigenvector Analysis. Practical Results in the Central Peru Power System

Abstract: To eliminate oscillatory instability in electric power systems by inserting stabilizers, it is important to have available analytical criteria for the choice of the most suitable generators to which to put the stabilizing feedbacks, and for defining the most convenient parameters for them, without resorting to simulation. Applying some properties of control systems it is possible to set up digital programs based on calculations of eigenvalues and eigenvectors that solve these problems satisfactorily. The report then shows application of the procedures thus defined to a practical case of instability, and field test results that confinn the elimination of instability.

Simulation of Arc Furnace Power Systems

Abstract: An electronic arc model has been developed which simplifies the study of harmonic phenomena in are furnace power systems on a transient network analyzer (TNA). The model helps insure the proper magnitude and phase relationship of the harmonies at each loading condition. The simulation procedures and arc model characteristics are described. Also, some examples of typical study results are given.

Supplementary Definitions & Associated Test Methods for Obtaining Parameters for Synchronous Machine Stability Study Simulations

Abstract: Definitions are presented for synchronous machine operational parameters, along with general descriptions of frequency response test methods for obtaining such parameters

Unit commitment of thermal generation

Abstract: The problem of determining a feasible generation schedule for a thermal power system that minimises the cost subject to operating and electrical constraints is formulated as a mixed integer programming problem. The model caters for linear and nonlinear fuel cost relations, exponential start up costs, nonlinear loading rates and limits on generators outputs. The method of solution is based on a branch-and-bound capacitated transshipment approach that allows the exploitation of the engineering characteristics of the problem, resulting in an efficient solution procedure.

Computer Simulation of Generator-Thyristor Networks in Power Systems

Abstract: The digital computer simulation of a generator-thyristor network in power systems is described in this paper. The digital model of the synchronous generator with either controlled or uncontrolled rectifier bridge deals efficiently with the complex commutation conditions when the source impedance is significant. From the equations developed in this paper, the performance of synchronous generators with or without damper windings, connected to controlled or uncontrolled bridge rectifier loads, can be predicted from given loading data, field current, load current, generator speed, and bridge delay angle. The simulation technique is used to evaluate the performance of a salient-pole synchronous generator during both steady-state and fault conditions.

The Micro-Machine as a Teaching Aid to Power System Simulation Study

Abstract: The micro-machine is a scale-model of large generators in electric power systems. This model is useful as a teaching aid in a power systems laboratory to help students understand the basic concepts of electro-mechanical dynamics, the principle of regulator and stabilizer design and test procedures.