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Power Apparatus and Systems, IEEE Transactions on

Issue 4 • Date July 1985

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Displaying Results 1 - 25 of 34
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1985 , Page(s): c1 - 976-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1985 , Page(s): c2
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    Freely Available from IEEE
  • Improvement in the Instrumentation for Partial Discharge Location in Cables

    Publication Year: 1985 , Page(s): 753 - 760
    Cited by:  Papers (2)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2003 KB)  

    An instrument for detecting and locating partial discharges on power cables has been developed. This paper describes some recent improvements that have been incorporated. It also presents new experimental data which show that low level discharges on cables the length of full reels can be located. Documentation is also included which shows that it is possible to locate each of more than one simultaneously operating sources of noise on a cable. View full abstract»

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  • Air Cycle Cooling System for HPOF Cables-Waltz Mill Tests

    Publication Year: 1985 , Page(s): 761 - 767
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    A prototype air cycle cooling system, designed for forced cooling of HPOF pipe-type cable, was built under an EPRI contract. Its main components are a turbine and compressor operated on a single high speed shaft and a compact cable. oil to air heat exchanger. Air cooling is supplemented by a spray water system. Tests were conducted on the prototype unit at the EPRI Waltz Mill Cable Test Facility to evaluate its performance and operating characteristics. This paper briefly describes this equipment and presents the results of the test program. View full abstract»

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  • A Versatile Computer Method for Computation of Conductor Temperatures in Cable Terminations and Pipe Cable Systems

    Publication Year: 1985 , Page(s): 768 - 774
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    A computer method, originally developed for the determination of ampacity and ratings of cable. terminations, has been expanded to cover also the thermal analysis for accurate ratings of underground pipe-type cables. The versatile computer method is able. to handle many situations where the traditional methods are either inaccurate or too complex. The main advantage of the method is its ability tp provide fast solutions in abnormal emergency situations where the traditional methods will tend to produce incorrect ratings. The new computer method will. also be of substantial value in evaluation of new underground pipe-type cable systems or similar installations. View full abstract»

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  • Development of 275 kV Internally Water-Cooled XLPE Cable

    Publication Year: 1985 , Page(s): 775 - 784
    Cited by:  Papers (1)
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    The Tokyo Electric Power Co., Inc. and Dainichi-Nippon Cables, Ltd. have been proceeding with their joint project of developing an 275 kV internally water cooled XLPE cable. This paper is concerned with the general aspects of our developmental achievements so-far. View full abstract»

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  • Nuclear Power Generating Station Operability Assurance Reliability, Availability, and Maintainability Application for Maintenance Management

    Publication Year: 1985 , Page(s): 785 - 789
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    Environmental qualification and equipment warrantee insurance stipulations should be supplemented with a reliable maintainability program structured to identify and control fast failing subcomponents within critical equipment (i. e., critical being related to meeting power production needs or plant safety). Anticipation of equipment subcomponent failures can control unnecessary plant off-line occurrences. Incorporation of reliability, availability, and maintainability considerations into plant maintenance policies on power generation and safety related items have positlve cost benefit advantages. View full abstract»

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  • Compressed -Air Energy Storage (CAES): Overview, Performance and Cost Data for 25MW to 220MW Plants

    Publication Year: 1985 , Page(s): 790 - 795
    Cited by:  Papers (4)  |  Patents (1)
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    Comparative results are presented for the performance and cost data of 25MW-220MW compressed-air energy storage (CAES) power plants. The data include steady-state and dynamic load following characteristics, turbomachinery versus storage costs and siting flexibility for this type of energy storage power plant. Also presented is a description of the various types of air storage geologic formations available in about 3/4 of the United States. View full abstract»

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  • Houston Lighting and Power Company Evaluation of Compressed Air Energy Storage

    Publication Year: 1985 , Page(s): 796 - 802
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    Compressed air energy storage (CAES) is a resource being evaluated by Houston Lighting and Power Company (HL&P). There is underground salt formation suitable for CAES development around HL&P's service area. This paper presents the results of a preliminary economic analysis of a 660 MW CAES plant in 1994 in comparison with a coal/lignite plant. Sensitivity analysis was conducted to examine the effect of off-peak charging energy from outside systems and the effect of gas prices. Results indicated that the CAES plant had a benefit to cost ratio of 1.15 which would be raised above 1.5 if off-system charging energy at a reasonable price could be obtained. Decreasing gas price would favor CAES in comparison with coal or lignite. The CAES plant in operation would save 5 to 13 million mcf of gas per year. View full abstract»

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  • Air Storage Requirements for a 220 Mwe CAES Plant as a Function of Turbomachinery Selection and Operation

    Publication Year: 1985 , Page(s): 803 - 808
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    This paper examines the effects of compressor train selection, turbine operation and the generation/compression cycle for a 220 MWe CAES plant which operates with a HP turbine inlet pressure of 44 bar (638 psia). The required air storage mass for a particular CAES generation/compression cycle is a function of both the total air mass withdrawn (during generation) and the total air mass added (during compression). Thus, the air storage mass is dependent upon both the air mass flow rates and daily operating times for the individual turbine and compressor selected. View full abstract»

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  • CAES: The Underground Portion

    Publication Year: 1985 , Page(s): 809 - 812
    Cited by:  Papers (3)
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    The storage of compressed air underground is a proven and acceptable technique. Solution mined salt caverns, hard rock conventionally mined caverns, and aquifers can be used to successfully store compressed air. This paper will review the experience of underground containers and will discuss the storage of compressed air for Compressed Air Energy Storage (CAES) type facilities. Since the technique of storing air is identical to storing natural gas, the successful long-term experience of natural gas storage projects will be reviewed. View full abstract»

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  • A Retrofit Turbine Automatic Control for Large Steam Turbine-Generators

    Publication Year: 1985 , Page(s): 813 - 816
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    The present trend of upgrading older turbine-generator sets for extended operating life and cycling has generated the need for automatic startup capability in existing power plants. This paper describes a new automatic control system which will interface with existing mechanical-hydraulic or electro-hydraulic controls on large steam turbine-generators in central power stations. It provides push-button control for startup from turning gear through synchronization to a preset load demand. Stresses in high temperature rotors are controlled during this startup operation by automatic selection of appropriate acceleration rates, speed holds, and loading rates. Stresses are controlled during unloading as well. The system utilizes a commercial minicomputer connected to an operating panel, thus providing the versatility necessary to interface with the many variations of turbine-generator Sets in operation. View full abstract»

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  • Implementation of Human Factors Considerations in a Coal Fired Generating Station Control Room

    Publication Year: 1985 , Page(s): 817 - 820
    Cited by:  Papers (1)
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    Fossil fueled generating station control room design has followed a basically classical approach until recent years. However, as technological advances occurred and were retrofitted into these control rooms, some clashes occurred between the environment and the equipment which negatively impacted the operator's effectiveness. One utility's approach toward implementing the incorporation of new technology devices and of solving the resulting human factors problems is discussed. View full abstract»

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  • Steam Turbine Start up Method Based on Predictive Monitoring and Control of Thermal Stresses

    Publication Year: 1985 , Page(s): 821 - 828
    Cited by:  Patents (1)
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    A turbine start up program decision and control method based on rotor thermal stresses has been developed. View full abstract»

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  • New UPS System Configuration that Will Improve Energy Efficiency

    Publication Year: 1985 , Page(s): 829 - 834
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    The Communications/Electronics Facilities Project Office of the Chesapeake Division, Naval Facilities Engineering Command (Code FPO-2), was established as the overall center of technical expertise for the Department of the Navy with respect to engineering, design and construction of Navy communications and electronics facilities. Specialized expertise is required for collection, analysis, and dissemination of technical information relating to high quality uninterruptible power systems, and to monitor advances in the state-of-the-art for applicability with respect to Navy requirements. Inherent in these responsibilities is the coordination of technical and contractual matters relating to the procurement and installation of Uninterruptible Power Supply (UPS) systems which are required to support these facilities. In fulfilling this responsibility, the Communications/Electronics Facilities Project Office awards multi-year procurement contracts for UPS equipment and necessary technical data; provides Integrated Logistic Support (ILS) plans, parts provisioning and software; and establishes the overall configuration management policy for the identification, control and status accpunting of UPS configuation. View full abstract»

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  • Electric Heat Tracing Requirements for Post-Accident Sampling Systems in Nuclear Power Generating Stations

    Publication Year: 1985 , Page(s): 835 - 838
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    Where hydrogen analyzers and remote radiation monitors are used to meet the NRC post-accident sampling requirements, electric heat tracing may be required on the sample lines to prevent condensation of moisture in the lines which would affect the accuracy of the monitoring equipment. View full abstract»

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  • Voltages Induced by Lightning Strokes and Ground-Faults on a Coaxial Telecom Circuit Enclosed in a Composite Earthwire Part I: General Approach and Earth Faults Induced Voltages

    Publication Year: 1985 , Page(s): 839 - 845
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    This paper presents the first part of a comprehensive research program about the problem of maximum induced voltages inside a composite coaxial earthwire for overhead transmission lines (the coaxial pair being used as a private telecommunication circuit). Based on the concept of transfer impedance, one can derive a general four steps calculation procedure valid for both cases of lightning strokes and earth faults. The problem of voltage induced by phase to earth faults is dealt with in Part I where unpublished experimental results on saturation effects in composite earthwire at 50 Hz and a parametric analysis of induced voltages are presented. Practical values of maximum induced voltages are given. View full abstract»

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  • On-Line Contingency Selection Algorithm for Voltage Security Analysis

    Publication Year: 1985 , Page(s): 846 - 856
    Cited by:  Papers (6)
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    Presented in this paper is a new concept in formulating a performance index for contingency selection concerning voltage security anlaysis. The performance index is defined as a second order vector norm in the voltage space. Two types of voltage limits, alarm limit, and security limit, are introduced. Each axis of the voltage space is normalized by the difference between these two limits. Contingency cases in which the performance indices are greater than 1.0 are selected as severe cases and can be ranked in order or severity. This type of normalization results in a clear definition of security. Rapid contingency simulation is performed using essentially noniterative linearized models. Test results indicated reasonable contingency selection and ranking for both a sample test sytsem and an actual power system. View full abstract»

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  • Bad Data Suppression in Power System State Estimation with a Variable Quadratic-Constant Criterion

    Publication Year: 1985 , Page(s): 857 - 863
    Cited by:  Papers (2)
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    This paper reports numerical results on tests of a new bad data suppression strategy for power system state estimation. A transformation-decoupled state estimator [1] is used in conjunction with a variable quadratic-constant criterion whose break even point is designed to track the upper bound of normalized residues of good measurements. Numerical simulations with a 6-bus test system and the IEEE 30-bus system show that the new bad data suppression strategy, is very effective for different systems under many uncertainties in the sizes and numbers of bad data with a moderate measurement redundancy. View full abstract»

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  • Protective Relaying for Tapped High Voltage Transmission Lines

    Publication Year: 1985 , Page(s): 864 - 872
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    It is Ontario Hydro's practice to provide a dual supply to subtransmission or distribution buses supplying loads in excess of approximately 45 MVA. A typical supply station of this type utilizes two transformers which are normally operated in parallel on the low voltage side through circuit breakers, and connected to separate high voltage supply circuits via air break switches. A multi-tapped supply line may cause protection difficulties and the required solutions deviate from the conventional two-ended line protections. In this paper typical protection problems, their solutions and operating experience of the multi-tapped high voltage transmission lines are described. View full abstract»

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  • Feeder Protection and Monitoring System, Part I: Design, Implementation and Testing

    Publication Year: 1985 , Page(s): 873 - 880
    Cited by:  Papers (5)  |  Patents (7)
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    This paper describes the development of a microcomputer-based Feeder Protection and Monitoring System at Texas A&M University. The Feeder Protection and Monitoring System includes an overcurrent relay to provide overcurrent protection for a distribution feeder and it includes an arcing fault detector which identifies some low current faults which are not cleared by overcurrent protection. The system also provides a monitoring capability which supports data storage and remote interaction with a user. The paper describes the design of the system, how the design was implemented, and the testing of three prototypes which were built for research purposes. These units properly demonstrated the overcurrent protection, arcing fault detection and monitoring functions of the system, as well as many of the features of power system automation. View full abstract»

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  • Effect of Surge Wave Reflection Inside a Motor On Voltage Distribution Across Stator Windings

    Publication Year: 1985 , Page(s): 881 - 889
    Cited by:  Papers (6)
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    A study was conducted to evaluate the need for surge protection of large motors in NGL plants. Power system analysis indicated that motor winding insulation can withstand lightning and switching surges. Motor surge protection was not installed as a result. The investigation of subsequent failure of four 21,000 HP motors indicated that motor winding failures occurred due to high magnitude switching surges. The test results of winding insulation surge withstand level and voltage distribution across coils are presented. The repetitive insulation failure of the second coil in all four motors is explained. View full abstract»

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  • Performance of Contaminated Bushing of UHV Transmission Systems

    Publication Year: 1985 , Page(s): 890 - 899
    Cited by:  Papers (3)
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    This paper describes the power-frequency contamination withstand voltage characteristics of a UHV bushing under light contamination condition. The withstand voltage of a UHV porcelain housing under light contamination condition was not in proportion to the effective length. On the other hand, the linear relation between the withstand voltage and the effective length was confirmed for the complete bushing up to the effective length of 12 m. Thus it was clarified that the withstand voltage under light contamination was favorably influenced by the inner components of the UHV bushing. View full abstract»

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  • Comparison of Three Techniques of Partial Discharge Measurements in Power Transformers

    Publication Year: 1985 , Page(s): 900 - 909
    Cited by:  Papers (7)
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    The paper presents a comparison of partial discharge (PD) measurements taken on 140 large power transformers using radio-influence voltage (RIV) meters calibrated in pV according to NEMA 107 Standard and also with the aid of wide-band and narrow-band PD detectors calibrated in pC according to IEC Publication 270. Results are presented in the form of pC/¿V ratios and compared to data from the literature. In conclusion the RIV measuring technique is considered inappropriate for PD measurements on power transformers, although it can be employed to detect the presence of the discharges. View full abstract»

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  • Low Temperature Performance of Naphthenic and Paraffinic Oils in Transformers and Automatic Circuit Reclosers

    Publication Year: 1985 , Page(s): 910 - 917
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    This paper presents, on a comparative basis, the results of tests performed at low temperatures between a reference naphthenic oil and an experimental paraffinic oil in various oil-filled electrical components. These tests demonstrate that the viscous behavior of the paraffinic oil below -20°C renders this oil unacceptable for use in transformers and circuit reclosers. 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