A review is given of the progress of optimal dispatch, also called economic dispatch, since its inception to the present in chronological sequence. The classic single area as well as multiarea cases are summarized, and the important theoretical work in optimal load flows suggested to date reviewed. Approaches to the optimal load flow taken by industry are also reported, as well as an itemization of problems that still remain to be solved.

Optimal power dispatch: a comprehensive survey

Proper representation of load is important in power system stability studies, but it is a difficult task. Load modeling is qualitatively different from generator modeling in many aspects. Composition of load needs to be reliably estimated, models of different components must be combined to obtain a reasonably manageable overall system model, and field measurements are not at all easy.

Load Representation in Power System Stability Studies

This paper reviews the progress of optimal dispatch, also called economic dispatch, since its inception to the present in chronological sequence The classic single area as well as multiarea cases are summarized, and the important theoretical work in optimal load flows suggested to date reviewed Approaches to the optimal load flow taken by industry are also reported, as well as an itemization of problems that still remain to be solved

Optimal power dispatch -a comprehensive survey

This paper reviews the progress of optimal dispatch, also called economic dispatch, since its inception to the present in chronological sequence. The classic single area as well as multiarea cases are summarized, and the important theoretical work in optimal load flows suggested to date reviewed. Approaches to the optimal load flow taken by industry are also reported, as well as an itemization of problems that still remain to be solved.

Optimal power dispatch&#2014;A comprehensive survey

Representation of Induction-Motor Loads During Power-System Stability Studies

Methods are presented for determining the transient stability of systems of synchronous and induction machines. Treatment of the induction machine by its inertia and a voltage back of transient reactance makes possible its representation in stability studies by an a-c network calculator or digital computer. A digital-computer method for transient-stability studies is outlined, based on representation of the connecting power network by its admittance constants. Synchronous and induction machines are treated as in the a-c network calculator studies. The method is illustrated and its accuracy verified by application to a simple system having two synchronous machines, two induction motors, three fault busses, and two shunt loads. A complete derivation of the admittance method is included in the paper as well as accuracy criteria for the admittance constants.

Transient-Stability Studies - I Synchronous and Induction Machines [includes discussion]

A method is presented for predetermining the economic dispatch of a steam-electric generating system including consideration of transmission losses. The equations of economic dispatch are solved for a range of values of delivered power cost to develop the dispatch curves. Novel features include an iterative method of solution which simplifies and shortens the work, and an interpretive study which shows how the single set of dispatch curves may be used to determine the economic dispatch with units out, and to determine the sale power cost at interconnections, and how it may be used for other similar extensions. The complete method for determination of the loss formula to determination and interpretation of the economic-dispatch curves is described using the Ohio Edison system as an example. The feasibility of holding tie power fixed at average values while determining the economic dispatch of generation is demonstrated for this system. The problem of selecting a proper reactive to real power ratio at generating stations is discussed and a solution proposed. This is part of a joint study1,2; which has been participated in by Commonwealth Associates, Inc., Consumers Power Company, Ohio Edison Company, Pennsylvania Power Company, and the Westinghouse Electric Corporation.

R. W. Long

Papers

Transient-Stability Studies - I Synchronous and Induction Machines [includes discussion]

Loss Evaluation; Part III. Economic Dispatch Studies of Steam-Electric Generating Systems [includes discussion]