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Power Engineering Review, IEEE

Issue 6 • Date June 1999

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Displaying Results 1 - 8 of 8
  • Electric Power Quality and Artificial Intellignece: Overview and Applicability

    Publication Year: 1999 , Page(s): 5 - 10
    Cited by:  Papers (7)
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  • The California Electricity Market

    Publication Year: 1999 , Page(s): 11 - 12
    Cited by:  Papers (1)
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  • People in the news for professional achievements

    Publication Year: 1999 , Page(s): 30
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    Freely Available from IEEE
  • Height extrapolation of capacity factors for wind turbine generators

    Publication Year: 1999 , Page(s): 48 - 49
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (212 KB)  

    This letter discusses height extrapolation of capacity factors of a wind power plant. The power law is used to arrive at a new mathematical formulation for the vertical adjustments of analytically computed capacity factors. The Weibull statistical model, using cubic mean of wind speeds, is employed for estimating the capacity factors. The new formulation is useful for estimating capacity factors at the time of planning and installation of new wind power stations and upgrading of existing wind stations by capacity addition View full abstract»

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  • Explaining complex power

    Publication Year: 1999
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    The author discusses the exchange between W.E. Kazibwe in the August 1998 issue and D.W. Knudsen in the October 1998 issue of Power Engineering Review. Kazibwe's main point is important: the concept of imaginary (reactive) power is a slippery slope when engineers talk to those without a technical background. Knudsen's main point is equally important: analogies to electrical phenomena can obfuscate instead of clarify. Reactive power, which makes power line voltages sag and substations heat up, is overlooked by most people because it is as difficult to sense as is the similar surging of power in a light bulb. This alternating power is unperceived except by VAr-meters and engineers, as even watthour meters fail to grasp it. A valid analogy from common experience can contribute to a good understanding of the phenomenon, however. Electrical engineers should be able to point out in a simple example the analogs of real power, reactive power, reactive and real power loss, frequency, capacitance, inductance, and various other mysterious electric quantities without needing to resort to the jargon of the “imaginary” or to orthogonal axes View full abstract»

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  • The affine-scaling dual algorithm as an alternative to solve the power system state estimation problem

    Publication Year: 1999 , Page(s): 50 - 52
    Cited by:  Papers (1)
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    A linear programming formulation is employed to solve the power system state estimation problem using an interior point method based on the affine-scaling dual algorithm. This algorithm was selected due to its simplicity and easy direction search toward the optimal. The algorithm was applied successfully to several power systems considering simultaneous measurements containing gross errors. Results show good performance View full abstract»

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  • Advantages of the instantaneous reactive power definitions in three phase system measurement

    Publication Year: 1999 , Page(s): 54 - 56
    Cited by:  Papers (8)
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    The spatial vector concept of the instantaneous apparent power is defined. Some advantages obtained using these definitions in measuring power in a three-phase system and in vector control of electrical machines are discussed. Also, a physical interpretation of these definitions is given based on conventional electromagnetic theory View full abstract»

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  • Application of fuzzy logic to induction motors condition monitoring

    Publication Year: 1999 , Page(s): 52 - 54
    Cited by:  Papers (3)
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    This letter applies fuzzy logic to induction motors condition monitoring. The preliminary results show that fuzzy logic can be used for accurate induction motors fault diagnosis if the input data are processed in an optimized way View full abstract»

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