Showing papers in "International Journal of Electrical Power & Energy Systems in 1980"

TL;DR: Automatic generation control is discussed from the point of view of the steady-state loadflow between areas, the control algorithm, noninteractive control, optimum control and its impact on security enhancement, as well as the various interfaces to upper and lower level control functions.

TL;DR: Models, concepts and methods for incorporating the effect of protection-system failures into the reliability evaluation of power transmission networks are presented.

TL;DR: The capability of the method of phase coordinates to extend the range of power system network analysis beyond the scope of transformation methods, such as the symmetrical component method, without incurring any increase in model complexity is illustrated.

TL;DR: In this paper, a scheme for the interactive development of expansion strategies for transmission networks in which stability and voltage considerations are not of prime importance is described, and two separate interactive computer programs are implemented in a package called Tranex.

TL;DR: The Box-Jenkins time series analysis is used in short-term load forecasting, and a forecasting system developed at the Imatra Power Company is described, which gives good results in other forecasting problems of electrical energy systems.

TL;DR: In this article, the utilization and coordination of reactive sources and other voltage control equipment in system operations are discussed, including generators, synchronous condensers, switched static capacitors and shunt reactors, and transformers with and without load-tap changing capabilities.

TL;DR: In this article, a hierarchical approach for the state estimation of large-scale electric power systems is proposed, which consists in decomposing the overall system into subsystems and in performing a two-level calculation.

TL;DR: The application of component schemes for the analysis of fault currents in polyphase power systems is discussed in this paper, where real transformations to components are derived, which are useful for transient analysis.

TL;DR: In this article, the impact of different fault types on the transient stability of a transmission system is demonstrated, and a single index of the stability of the overall system for different faults is developed.

TL;DR: In this article, a controlled network separation scheme is proposed which will divide the system into stable, power-balanced "islands" for online computer implementation, and the effectiveness of the scheme is illustrated by its application to a model power system.

TL;DR: In this article, two general classes of methods for taking into account the inflow availability are presented, namely two-stage linear programming under uncertainty and chanced constrained programming, and the computational feasibility of both methods is illustrated by solution of a sample problem.

TL;DR: In this paper, three methods for stabilizer design using pole assignment technique with output feedback are presented, the first method uses modal control techniques with a least-square minimization method, the second and third involve static optimization.

TL;DR: In this paper, the authors present a demonstration program for phase-coordinate analysis of polyphase networks, which is suitable for both students and practising engineers to apply to their own work.

TL;DR: In this article, an effective load-carrying capability prediction model is developed which preserves a linear structure of the generation planning problem, and optimum investment plans can be found which link economic decisions to measures of system reliability such as the loss of load probability index.

TL;DR: In this paper, a reduced-order equivalent model for stability studies of interconnected power systems is presented where the system under study is composed of a main system and interconnected subsystems, and the reduction obtained by this method is quite effective with no loss of response accuracy.

TL;DR: In this paper, an algorithm based on nodal power balance is developed using the output of a state estimator in which bad data has been filtered, which does not succeed in identifying both types in most cases.

TL;DR: The main features of the approach and the related computer programs used at the Ente Nazionale per l'Energia Elettrica in Italy when planning the generating system are summarized and the application of such methods to the optimized system over 10 years of its development and the optimization of the peak duty storage plants is presented.

TL;DR: In this article, a large class of algorithms are examined with regard to their ability to identify the location of a fault on a transmission line in the presence of transient phenomena which distort the sinusoidal voltage and current waveforms shortly after the occurrence of the fault.

TL;DR: The computed reliability indices are in general upper bounds to the corresponding set of reliability indices obtained by using a linear network flow modelling of the composite power system.

TL;DR: In this paper, a generalized state-estimation algorithm is derived using linear weighted least-squares theory and concepts of network solvability for any arbitrary distribution of given or measured variables.

TL;DR: A new load-flow solution technique based on the Newton-Richardson method is proposed, which is an attractive alternative for systems where the conventional Newton-Raphson method is preferred.

TL;DR: In this article, a method for finding the criterial value for the Lyapunov function is proposed, which eliminates generation of all possible starting points by finding the minimum cut set for a certain network representing transfer synchronizing powers of generators.

TL;DR: In this paper, a probabilistic method and a practical algorithm of optimal unit commitment and load distribution among power stations are presented. And an example of the computations performed for a large power system is given.

TL;DR: The presented method of steady-state calculation places weak restrictions on a set of data and also permits calculations in the case of redundancy, deficiency or where the set ofData is minimal.