POWER SYSTEM AND ELECTRICAL REFERENCES

Six Sigma analysis tools: Diagram of CE/CNX | FishBone | 5S Management.com

2010-12-12T00:28:00.000-08:00

Six Sigma analysis tools: Diagram of CE/CNX | FishBone | 5S Management.com

Simplifications for Area Security Analysis : A New Look at Equivalence

2010-09-16T06:33:00.000-07:00

Hernando Duran and N.V. Arvanitidis, PAS 91, No.2, March/April 1972, pp 670-679 Analysis of an area within a large interconnected power system under various system configurations and load conditions is often needed in off- and on-line applications. Equivalence isolates the study area and represent the rest of the system by a simplified equivalent model. A new and more comprehensive approach to

Dynamic equivalent for average system frequency Behavior Following Major Disturbances.

2010-08-13T21:46:00.000-07:00

M.L. Chan R.D. Dunlop and F. Shweppe, PAS 91 No.04 July/August 1972 pp 1637-1642 This paper endeavors to model the effects of governor-turbine dynamic on the average system frequency behavior of a multi-generator system after a

On Line Identification of Interconnected Network Equivalent from Operating Data

2010-08-13T15:12:00.000-07:00

Abstracts: T.G. Deville and F.C. Schweppe, PAS 91 No.6 November/December 1972 p. 2258 In order to predict how a single network will behave, it is necessary to determine how it will interact with its neighboring interconnected networks. A method is presented for finding an equivalent for the interconnected network using only operating data obtained from within the single network. In general, this

A Note on Static Equivalent Circuits of Power Systems

2010-08-12T00:17:00.000-07:00

Abstract : S. Vemuri, E.F. Hill and R. Balasubramamian, PAS 92 No.2. No.3 May/June 1973 p.856 Equivalent Circuits are used in the load flow problem to effect faster solutions and a corresponding saving in computer time. A method

Power System Model Reduction - A Canonical Representation

2010-08-11T00:23:00.000-07:00

Abstracts : J.B. Woodward and F.C. Schwepe, PAS 93 No.31 No.1 January/February 1974 P.6 Many Studies of system frequency response to load changes or generation losses use average frequency and energy balance concepts. This paper

Sparsity-Oriented Network Reduction

2010-08-10T18:50:00.000-07:00

Abstract: W.F. Tinney, W.L. Powel N.M Peterson, PAS 93 No.1, January/February 1974, p.6 The conventional approach to network reduction in which all non essential nodes are limited usually results in an equivalent that is so densely interconnected that sparse matrix methods cannot be effectively used on it. In order to obtain an equivalent that is suitable for sparsity exploitation, it is usually

Multi-machine modeling for Power System Generators

2010-08-04T19:59:00.000-07:00

Abstracts: A.K. Laha and K.E. Bollinger PAS 93. No. 1, January/February 1974, p. 8 This paper describes a modeling technique for setting up digital computer models of multi-machine power systems. The advantages of this modeling

Application of simplified dynamic models to the Italian power system

2010-08-02T20:13:00.000-07:00

Abstract: R. Marconato, E.Mariani, and F. Saccomano, PAS 93 No 1 January/February 1974 p.3 For practical application, the setting-up of simplified dynamic models may be regarded as a necessary step in the study of the dynamic behavior of larger power systems. The definition of criteria for models reduction obviously depend on the final objective, as the satisfactory reproduction of some

Reduction of Dynamic models of Power System

2010-07-26T23:08:00.001-07:00

Abstract: J.E. Van Ness, H. Zimmer and M. Cultu PAS 93. No.1, January/February 1974 p.3 The order of the differential equations required to represent in detail the dynamic response of a large power system with its associated

Dynamic Equivalents of Asynchronous motor Loads in System Stability Studies

2010-07-24T17:39:00.000-07:00

F. Iliceto and A.Capasso, PAS 93, No.5, September/Oktober 1974, p.p 1650-1659 The Dynamic behavior of complex asynchronous motor loads has been investigated by means of a digital computer program base on general equation for

Network equivalent for On-Line System

2010-07-23T02:33:00.000-07:00

Abstract : E.K. Paulson, PAS 93, No. 6, November/December 1974, p.1741 This paper presents and discusses methods for including the influence of unobservable parts of interconnected system upon on-line contingency load-flow calculations for an observable study system, i.e. network equivalent s. Two different methods are described, one using conventional network reduction techniques and the other

Active Network Equivalent for Load Flow studies

2010-07-20T01:47:00.000-07:00

Abstract: R.R. Roberge and M. Etezadi-Amoli, PAS 93, No. 6, November/December 1974, p.1740 This paper develops an active equivalent for a sub-network of an interconnected network and incorporates this equivalent into an efficient

Model Identification using Tie Line Power and Frequency Measurements

2010-07-14T00:53:00.000-07:00

Abstract: M.W. Schwartz, G.L. Park and R.A. Schlueter, PAS 93 No. 6 November/Desember 1974, p.1733 The identification of dynamic model which related power and frequency deviation on a tie-line is investigated. The identification

Dynamic Equivalents From on-line measurements

2010-07-10T00:57:00.000-07:00

W.W. Price, D.N. Ewart, E.M. Gulachenski, and R.F. Silva, PAS 94, No.4 July/August 1975, pp. 1349-1357 This paper presents the result of a feasibility study of a technique for identifying dynamic equivalents or portions of power system from measurements made only within a restricted Study System without intentional Perturbation of the system. The maximum likelihood technique is used to identify

Simplified Representation Of Induction Machine Dynamic

2010-07-07T20:40:00.000-07:00

P.C. Krause and A. Murdoch, III, PAS 94, No. 4, July/August 1975, p.1098 Two simplified, reduce order representations of INDUCTION MACHINE are set forth. One Representations is expressed in term of variables in the synchronously

Disturbance dependent electromechanical equivalent for transient stability studies.”

2010-06-30T00:55:00.000-07:00

T.M. McCauley PAS 94, No.4, July/August 1975, p.1094 (Abstract) This paper describes an automatic method for forming electromechanical equivalent for use in transient stability studies. Pre-fault and post-fault load flow together

Dynamic Single-unit representative of induction motor groups

2010-06-27T22:01:00.000-07:00

M.M.A. Hakim and G.J. Berg, PAS 95 No.1, January/February,1976 pp 155-165. The paper describe a method of representation a group of inductor motor loads by a single-unit equivalent. The dynamic performance of the composite group following supply disturbances is examined using the single unit model. The representation employs the inductor motor steady state equivalent circuit and characteristic

Evaluating Alternative Models for Power System Dynamic Stability Studies

2010-06-24T19:18:00.000-07:00

R.T.H. Alden and P.J. Nolan, PAS 95, No.2, March/April 1976, pp 433-440 A dynamic stability model for detailed stability studies on synchronous power system is presented in such a form that it can be systematically reduced to

Investigation of the reduced order model for induction machine dynamic studies

2010-06-20T00:55:00.000-07:00

K.P.R. Sastry and R.E. Ruridge, PAS 95 No. 3 May/June 1976, pp 962-969 In this paper, a reduced order model of an induction machine is investigated using digital simulation and eigenvalue studies. The models is compared with the

Improving reduced dynamic models of power system

2010-06-18T08:03:00.000-07:00

J.E. VanNess, PAS 95 No. 4, July/August 1976, p. 1013 (abstracts) One Method of Forming a reduced order model for studying the dynamics of large power system allows the configuration of the model to be specified and then varies certain designated parameters in the model to give it the desire eigen values. The Eigenvalues of the system specify the modes of response, and the eigensvectors give

Coherency-Based Dynamic Equivalents: Applications in Transient Stability Studies

2009-12-29T03:48:00.000-08:00

R.W. DeMello, R. Podmore and K.N. Stanton, PAS 95, No.4, July/August 1976, p.1101 (abstracts) The paper describes the development of a method for determining an equivalent dynamic representation of an external power system for

Dynamic Equivalents using operating Data and Stochastic Modeling

2009-12-26T19:41:00.001-08:00

M.A.H. Ibrahim, O.M Mostafa, and A.H. El-Abiad, PAS 95, No.5 September /Oktober 1976, pp. 1713 – 1732 A method is developed to determine equivalent for extensive power systems external to an internal system equiooed with central control computer. These equivalents are needed for different system studies where the internal system is represented in detail, and the external system are represented

Dynamic Equivalents by combination of reduced order Models of System Component

2009-12-20T16:20:00.000-08:00

HY Altalib and P.C. Krause, PAS 95 No.5, September/Oktober 1976 pp 1535 – 1544 Davidson,n Method is used to reduce the order of a one machine infinite bus system with excitation control from a tenth to a fourth order system. This is accomplished by first reducing the machine from seven to third order and excitation system from third to fisrt order and the combining these models to form the

An External System Equivalent Model Using Real Time Measurement for System Security Evaluation

2009-12-20T05:57:00.000-08:00

J.F. Dopazo, M.H. Dwarakanath, J.J. Li, and A.M. Sasson, PAS 96, No.2 March/April 1977, pp 431 – 466 A model for external system equivalent appropriate for real-time system security evaluations proposed. The model has two components, one which models the reaction of the external system to system changes in past time intervals and a second component for adjusting the equipment model to present

Coherency Recognition for transient Stability Studies Using Singular Points

2008-08-03T06:29:00.000-07:00

B.D. Spalding, H.Yee, and D.B Goudie, PAS 96, No.4 July/August 1977, pp. 1368-1375 This paper describes a new method for the recognition of coherent machines for use in transient stability studies. The machine angles are compares for both the stable operating point, and for the unstable singular or equilibrium point corresponding to the system instability excepted to result from the system

A Computer based eigenvalue Approach for Power System Dynamic Stability Evaluation

2008-03-04T04:19:00.000-08:00

H.M. Zein El-Din and ETH Alden, PAS 97 No 2 March April 1978, p. 318 (Abstract) This paper describes a highly efficient computer based procedure for determining system dynamic stability as a function of system parameters. The method is applicable in many practical situations where relatively small number of the system eigenvalue are known to be critical in describing stability. Once a base case,

An RMS Coherence Measure: A basic for Unification of coherence and modal Analysis Model Aggregation Technique

2008-03-04T04:14:00.001-08:00

R.A. Schlueter, H. Akhtar, H. Modir, Paper A 78 533-2, 1978 Summer meeting, Los Angeles. Ca, July 1978. The principal objective of this research is to show that modal analysis and coherency based aggregation procedures can be considered completely parallel model aggregation procedures. Thus it will be shown that modal analysis equivalents are coherency equivalents and that procedures for

Testing of the modal dynamic equivalent technique

2008-03-01T01:00:00.000-08:00

W.W. Price, EM Gulachenski, P. Kundur, F.J Lange, G.C Loehr, B.A. Roth, and R.F. Silva, PAS 97, No.4, July/august 1978 Several technique have been proposed in the literature for constructing dynamic equivalent of power systems for used in stability studies. These techniques exist primarily as research tools and their applicability for use in large scale production studies has not been clearly

GEN-SET

2007-08-05T01:43:00.000-07:00

GENSET is the combination of an electrical generator and an engine mounted together to form a single piece of equipment. This combination is also called an engine-generator set or a gen-set. In many contexts, the engine is taken for granted and the combined unit is simply called a generator. In addition to the engine and generator, engine-generators generally include a fuel tank, an engine

The Fundamental Principle Of Electric Motor

2007-05-05T00:10:00.000-07:00

Electromagnetic motors are based is that there is a mechanical force on any current-carrying wire contained within a magnetic field. The force is described by the Lorentz force law and is perpendicular to both the wire and the magnetic field. Most magnetic motors are rotary, but linear motors also exist. In a rotary motor, the rotating part (usually on the inside) is called the rotor, and the

Electric Motor

2007-05-05T00:07:00.000-07:00

An electric motor converts electrical energy into mechanical energy. The reverse task, that of converting mechanical energy into electrical energy, is accomplished by a generator or dynamo. Traction motors used on locomotives often perform both tasks if the locomotive is equipped with dynamic brakes. Electric motors are found in household appliances such as fans, fridges, washing machines, pool

Equivalent circuit of electrical generator

2007-04-27T06:36:00.000-07:00

Equivalent circuit of generator and load.G = generatorVG=generator open-circuit voltageRG=generator internal resistanceVL=generator on-load voltageRL=load resistanceThe equivalent circuit of a generator and load is shown in the diagram to the right. To determine the generator's VG and RG parameters, follow this procedure: -- Before starting the generator, measure the resistance across its

Generator Consist of

2007-04-26T20:05:00.000-07:00

The parts of a electrical generator can be expressed in either mechanical terms or electrical terms. Although distinctly separate, these two sets of terminology are frequently used interchangeably or in combinations that include one mechanical term and one electrical term. This causes great confusion when working with compound machines such as a brushless alternator or when conversing with people

basic consept of electrical generator

2007-04-26T19:59:00.000-07:00

The electrical generator is somewhat analogous to a water pump, which creates a flow of water but does not create the water inside. The generator moves an electric current, but does not create electric charge, which is already present in the conductive wire of its windings. The construction of a generator is similar to that of an electric motor, and all common types of dynamos could work as

The Key to increase profitability and efficient in electrical distribution

2007-03-23T00:35:00.001-07:00

Digital system had came to solve complexity system of electrical distribution So, Its can reduce the unnecessary hardware and make the system simpler, more reliable and the same for the life cycle cost reduction (investment, operation, maintenance and destruction costs) Do you know SCADA? SCADA (Supervisory Control and Data acquisition) is a system as monitoring and control equipment which

FARADAY’S BASIC DISCOVERY

2007-03-23T00:33:00.000-07:00

Do you know, when the electric machine had been made? In 1831, the scientist Michael faraday discovered that a mechanical motion was introduced to move a closed circuit conductor in magnetic field, an electrical voltage was somehow produced that caused a current to flow. Some scholar have gone so far as to say that this was the most important scientific discovery of all time! Even is this is

How Electricity is generated and brought to consumer?

2007-03-23T00:32:00.000-07:00

Electricity is form of energy and is basically a flow of electrons in its naturally occurring state. It can be observed from battery cell or regulated electric mains supply The Generation of electricity in a power station is a process of energy conversion. Electricity can be generated from burning of oil, coal, gas or from nuclear reaction (uranium, plutonium) or moving water (hydro