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Power Apparatus and Systems, IEEE Transactions on

Issue 12 • Date Dec. 1983

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  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1983 , Page(s): c1 - 40-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1983 , Page(s): c2
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  • The Development of A Fully Synthetic Tape Insulation For Lapped Power Cables

    Publication Year: 1983 , Page(s): 3713 - 3719
    Cited by:  Papers (2)
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    The characteristics of the traditional kraft paper/oil insulation of power transmission cables are the limiting factors of cable performance in some applications. An insulating tape of an oriented polyolefin has been developed to overcome these limitations by improving the operating stress, heat transfer, charging current and SIC of a cable. Results are presented of tests on new materials and small cable samples. The test data are extrapolated to cable designs for 345 and 550 kV. View full abstract»

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  • Installation of 275 kV XLPE Cables in The Long And Steep Slope Tunnel

    Publication Year: 1983 , Page(s): 3720 - 3727
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    This paper describes about the actual laying of 275 kV XLPE cables in Tamahara pumped-storage power station of The Tokyo Electric Power Company, Incorporation which have very steep slope tunnel in the cable route. We have installed 4 circuits of 275 kV XLPE cables which is approximate 7.4 km as a whole length and outdoor terminations and reversed type oil immersed terminations. View full abstract»

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  • Alternative Twelve Pulse Arrangement For Static Var Control Applications

    Publication Year: 1983 , Page(s): 3728 - 3735
    Cited by:  Papers (1)
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    5th and 7th harmonics generated by a static var control system may be eliminated by the conventional twelve pulse arrangement employing wye-wye and wye-delta transformers or by an alternative scheme described in this paper. The alternative scheme offers the advantages that only one transformer is needed and generally less transformer loss is generated. Theoretical analysis and digital simulation of the new scheme are presented. The performances of the alternative scheme under balanced and unbalanced conditions have been investigated. View full abstract»

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  • Nuclear Unit Construction/Fuel-Loading Duration

    Publication Year: 1983 , Page(s): 3736 - 3743
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    Lead time (license, construction, fuel- load) for nuclear units is an important factor in planning for resources to meet future loads. The average lead time estimate has increased by 20 months between 1977 and 1982. Analysis of actual versus estimated lead time shows considerable uncertainty in the estimated lead time. View full abstract»

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  • Bibliography of Static VAr Compensators - Working Group 79.2 on Static VAr Compensators in A.C. Substations of the IEEE Substations Committee

    Publication Year: 1983 , Page(s): 3744 - 3752
    Cited by:  Papers (3)
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    This bibliography was prepared for Working Group 79.2 on Static Var Compensators in AC Substations of the IEEE Substation Committee. This bibliography is the initial issue of published material on Static Var Compensators. Due to the interest expressed in Static Var Compensators for both DC and AC. Applications, there is a need to list" aterial published up to the present day. The bibliography is presented in alphabetical order for the years 1971 to 1982. For the previous years, alphabetical order is observed for the periods 1921 through 1965 and 1966 through 1970. Further editions will be issued from time to time as they become available. View full abstract»

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  • Dynamic Equivalent Power System Models

    Publication Year: 1983 , Page(s): 3753 - 3760
    Cited by:  Papers (3)
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    This paper discribes the use of identification methods for the determination of dynamic equivalent models of portions of a power system. The resulting models are linear models for use in stabilizer design and dynamic stability studies. Data for the models are obtained from a transient stability program where small perturbations of the complex voltage on a bus are made, and the resulting complex currents are measured. Using the above data and linear system identification techniques, linear models are obtained relating the complex current to the complex voltage on the bus. The power system as seen from the bus may then be replaced by the model. An example system of 59 machines and 63 buses is used to demonstrate the method[l]. View full abstract»

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  • Choice Of Model And Topology For External Equivalent Systems

    Publication Year: 1983 , Page(s): 3761 - 3768
    Cited by:  Papers (5)
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    Two sensitivity methods are suggested in this paper for better utilization of the identification approach of dynamic equivalents. Before the identification process starts, these methods can be used to choose the most suitable model for the equivalent external system among several hypotheses. The parameters of the chosen model by these methods are identifiable, and the dynamic equivalent is valid. View full abstract»

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  • Design Of The Measurement System For State Estimation In The Norwegian High-Voltage Transmission Network

    Publication Year: 1983 , Page(s): 3769 - 3777
    Cited by:  Papers (13)
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    A method proposed by Koglin has been used to find an optimal measurement system for static state estimation in the Norwegian high-voltage transmission network. The method is extended in order to obtain a more robust solution in situations with loss of measurements and bad data, and to reduce the computational effort required. The significance of choice of estimation method, load flow situation and network topology is discussed. In addition the optimal measurement system has been compared with manually designed and arbitrarily generated systems. View full abstract»

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  • Analysis Of New Phenomenon Regarding Effects Of Humidity On Flashover Characteristics For Long Air Gaps

    Publication Year: 1983 , Page(s): 3778 - 3782
    Cited by:  Papers (1)
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    The humidity characteristics of positive polarity switching impulse flashover voltage on a rod-plane gap with a gap spacing of 10 m were investigated using an impulse generator newly built for phase-to-phase switching impulse tests at the UHV shiobara Testing Laboratory of CRIEPI. View full abstract»

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  • Testing Of Trapezoidal Integration With Damping For The Solution Of Power Transient Problems

    Publication Year: 1983 , Page(s): 3783 - 3790
    Cited by:  Papers (23)
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    A variation of trapezoidal integration (called trapezoidal integration with damping) for the solution of dynamic equations is described and tested. This method has several advantages over ordinary trapezoidal integration for the simulation of transients in power systems. The method is compared to ordinary trapezoidal integration, backward Euler and Gear 2nd order. The comparison is based upon local truncation error and upon performance of each method as a differentiator. The method is tested using a transmission line model response to a voltage step function, and the response of a HYDC converter with its controllers. Trapezoidal integration with damping is free from numerical problems, even when used as a differentiator; it provides a ready means for obtaining the "average behavior" of a simulator; it is fully compatible with trapezoidal; and it is very accurate. View full abstract»

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  • Stability Simulation Of Wind Turbine Systems

    Publication Year: 1983 , Page(s): 3791 - 3795
    Cited by:  Papers (150)
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    A simulation and digital computer modeling effort is described in which a wind turbine- generator system is adapted for stability evaluation using a large scale transient stability computer program. Component models of the MOD-2 wind generator system are described and their digital model equations are provided. A versatile wind velocity model is described, which provides the capability of simulating a wide variety of wind variations, in addition to the usual network disturbances. Computed results obtained from runs of the enhanced stability program are provided that illustrate the wind turbine-generator system dynamic performance for changes in wind velocity. View full abstract»

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  • Effect Of Test Geometry, Permittivity Matching And Metal Particles On The Flashover Voltage Of Oil/Solid Interfaces

    Publication Year: 1983 , Page(s): 3796 - 3802
    Cited by:  Papers (5)
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    The 60 Hz and lightning impulse flashover voltages of various pressboards, polyethylene and polypropylene in transformer oil were studied. Except for one discrepancy the two widely different test geometries used generally grade the materials in the same order. It is concluded that the difference between materials is due to different discharge propagation properties, and that the propagation is assisted by permittivity mismatch between liquid and solid. Surface structure can also affect the flashover, especially at impulse voltages. At 50 Hz the introduction of solid surfaces can increase the flashover voltage. Metal particles on the interface can reduce average values of the flashover voltage by at least 20 percent and minimum values even more. View full abstract»

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  • Efficiency Improvement Studies Of Low Voltage Three Phase Squirrel-Cage Induction Motors For General Purpose

    Publication Year: 1983 , Page(s): 3803 - 3809
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    With the demand for energy conservation in mind, this paper describes methods to improve the efficiency of Low Voltage Three Phase Squirrel-Cage Induction Motors for General Purpose, used widely in industry and describes the effects of these methods on other characteristics. Characteristics of motors and their costs are influenced by many design elements. This paper describes 25 input elements, put into a computer in order to calculate the design of a motor and 12 variable elements which affect the improvement of efficiency. The 12 elements are valued independently in order to study the effects on efficiency and other characteristics. The results of this study make clear which elements are comparatively effective in improving efficiency. Four design examples of high efficiency motors which combine these effective elements taking into consideration the possible use of magnetic wedges are shown. Then it is pointed out quantitatively that in order to put more effort into improving the efficiency along with compacting its size and lightening its weight as has been pursued up to the present, it is desirable to develop the following technologies. View full abstract»

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  • Determination of Synchronous Machine Electrical Characteristics by Test

    Publication Year: 1983 , Page(s): 3810 - 3815
    Cited by:  Papers (17)
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    A method of obtaining synchronous machine d and q axis impedances by test as function of frequency of d, q components is presented. The test involves running the machine at reduced speeds, with a line-to-line short circuit between phases, and temporarily applying excitation to produce line-to-line short circuit current at fundamental frequency corresponding to the particular running speed. Records of line-to-line voltages and short circuit current, along with measurement of rotor angle, are processed to yield d and q components of voltages, currents and flux linkages which turn out to be periodic functions of the fundamental frequency plus harmonics. Straight forward Fourier analysis yields the complex values of operational inductances or impedances Ld (j2¿), Lq (j2¿), Zd (j2¿) or Zg (j2¿) where ¿is equal to the speed of the machine at which the tests are conducted. View full abstract»

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  • Fast Transient Security Assessment

    Publication Year: 1983 , Page(s): 3816 - 3824
    Cited by:  Papers (13)
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    The growth of large interconnected power systems demands a high degree of security for normal operation. This requirement emerges from the fact that the possible disturbances in large power systems could have catastrophic results. Therefore it is the duty of power system control center to retain the operating point within secure boundaries. In order to control the security of system, one has to monitor and analyze the level of system security and enhance it in case it does not fulfill the system security requirement. The pattern recognition technique which is proposed in this paper is a method suitable for fast, on-line. security assessment. Most of the literature in this area concerns the use of steady state variables for identification purposes; the use of transient measurements, however, has been found to be better suited for the fast classification of operating points with minimal error. One of the salient conclusions of this paper is that the pattern recognition technique is a serious candidate for on-line applications. This favorable conclusion is based on the inclusion of transient state variables in the feature vector. View full abstract»

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  • Power System Security Functions Of The Energy Control Center At The Orange And Rockland Utilities

    Publication Year: 1983 , Page(s): 3825 - 3834
    Cited by:  Papers (3)
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    A new Energy Control Center has been installed and tested at Orange and Rockland Utilities and it has been successfully assisting the control center dispatchers in operating the power system. Power System Security functions are implemented at this control center, including Network Topology and Separated Network Detection, State Estimation and Bad Data Detection, Online Loadflow and Contingency Analysis, and Distribution Factor Fast Contingency Analysis. Besides these real-time oriented functions there is also a study function to help the dispatchers evaluate the security of the system for a future time. View full abstract»

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  • Fast Transient Stability Solution Using An Array Processor

    Publication Year: 1983 , Page(s): 3835 - 3841
    Cited by:  Papers (5)
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    A fast transient stability program for an array processor (FPS AP-120B) connected to a host computer (DEC VAX-11/780) has been developed by using unique technique for improving the speed of transient stability studies. They are solving techniques of differential equations using a modified Euler method, effective use of vector operation, and programming techniques adapted to the array processor. View full abstract»

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  • A Multiprocessor-Based Distance Relay: Design Features And Test Results

    Publication Year: 1983 , Page(s): 3842 - 3849
    Cited by:  Papers (1)  |  Patents (3)
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    This paper describes the prototype of a multiprocessor-based distance protection system for transmission lines. It explains the general structure of the eight parallel microprocessors, analog and digital interface and some of the hardware particularities. The relaying functions include impedance, overcurrent, overvoltage, line check and other algorithms. Also described are special features such as autocalibration, display, and local/remote monitoring The availability reliability and security aspects of the system are discussed. Finally, laboratory test results are reported. View full abstract»

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  • Quadratic Loss Formula For Reactive Dispatch

    Publication Year: 1983 , Page(s): 3850 - 3858
    Cited by:  Papers (5)
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    A loss formula based on the incremental power flow being a reduced form of the power flow is derived. The algorithm for its determination which utilizes the Jacobian matrix is given and the properties of the coefficients characterizing the incremental power flow are discussed. The key concept is the determination of a quadratic form such that second derivatives of the incremental power flow and of the load flow variables agree. The concept lends itself to load flow optimization, in particular for reactive dispatch for which an example (118 bus AEP system) is discussed. The results prove the expected high performance. View full abstract»

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  • Steady State Instability: Simplified Studies In Multimachine Power Systems

    Publication Year: 1983 , Page(s): 3859 - 3867
    Cited by:  Papers (2)
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    Steady State instabilities cause problems in electrical power systems all over the world. Most of the time critical conditions have been undetected by planning and operational studies since the cost of studying the stability of all potential operational conditions becomes prohibitively expensive for large multimachine power systems. This paper shows how classical concepts and techniques can be used in simplified analysis of these systems. Synchronizing and damping torques are formulated in a simple matrix form that permits the exploration of system characteristics and weaknesses. A European power system is used as an example to show the qualities of the proposed techniques. View full abstract»

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  • On-Line Weather-Sensitive And Industrial Group Bus Load Forecasting For Microprocessor-Based Applications

    Publication Year: 1983 , Page(s): 3868 - 3876
    Cited by:  Papers (6)
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    Algorithms are presented for on-line development of a nominal non-weather-sensitive load sequence and a pure weather-sensitive load sequence constructed from a composite residential and commercial weather-sensitive load sequence. These algorithms are intended for microprocessor-based applications, and they obey the realistic requirements of microprocessors. View full abstract»

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  • Decompositions For Optimal Power Flows

    Publication Year: 1983 , Page(s): 3877 - 3884
    Cited by:  Papers (5)
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    The Han-Powell algorithm has proved to be extremely fast and robust for small optimum power flow problems (of the order of 100 buses). However, it balks at full size problems (of the order of 1000 buses). This paper develops a class of decompositions to break large problems down to sizes the Han-Powell algorithm can comfortably tackle. From this class we select one mem- ber-called the Super Hybrid-that seems to work best and describe it in detail. View full abstract»

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  • Thermal Unit Availability Modeling In A Regional Simulation Model

    Publication Year: 1983 , Page(s): 3885 - 3892
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    The System Analysis Model (SAM) developed under the umbrella of PNUCC's System Analysi's Committee is capable of simulating the operation of a given load/resource scenario [1,2]. This model employs a Monte-Carlo simulation to incorporate uncertainties. Among uncertainties modeled is thermal unit availability both for energy simulation (seasonal) and capacity simulations (hourly). View full abstract»

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Aims & Scope

This Transactions ceased production in 1985. The current retitled publication is IEEE Transactions on Energy Conversion and IEEE Transactions on Power Delivery, and IEEE Transactions on Power Systems.

Full Aims & Scope