By Topic

Power Apparatus and Systems, IEEE Transactions on

Issue 6 • Date June 1982

Filter Results

Displaying Results 1 - 25 of 70
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Page(s): c1 - 1832-b
    Save to Project icon | Request Permissions | PDF file iconPDF (992 KB)  
    Freely Available from IEEE
  • IEEE Power Engineering Society

    Page(s): c2
    Save to Project icon | Request Permissions | PDF file iconPDF (262 KB)  
    Freely Available from IEEE
  • Harmonic Power Flow Studies Part I - Formulation and Solution

    Page(s): 1257 - 1265
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1325 KB)  

    The conventional Newton-Raphson power flow study has been reformulated to permit the inclusion of non-linear loads. These loads give rise to harmonic signals which propagate throughout the power system. The reformulation is based on the reduction-to zero of the mismatch active power and reactive voltamperes, the imbalahce current at harmonic frequencies, and the mismatch apparent voltamperbs. Conclusions on the existance of positive, negative, and zero sequence signals is made for harmonic frequencies. The harmonic power flow study formulation is illustrated for a three phase full wave bridge rectifier. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Harmonic Power Flow Studies - Part II Implementation and Practical Application

    Page(s): 1266 - 1270
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (670 KB)  

    This is a companion paper to a paper of the same title, Part I, in which the eLectric power flow problem is reformulated to account for harmonic signals which arise from nonLinear loads. In this paper, implementation and practical applications are discussed. The problem of initialization of bus voltages (including harmonics) is considered and convergence of the algorithm is assessed from the theoretical viewpoint and from the results of actual studies. The principal content of this paper is two examples both containing nonlinear loads (rectifiers). View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Impacts of Solar Heating Options Upon Electric Power Systems

    Page(s): 1271 - 1280
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1457 KB)  

    With increased popular emphasis on solar energy in recent years, concern has been raised about possible adverse effects the application of solar energy in residential and commercial sectors could have on electric utilities. Possible problems are deterioration of the generating system load factor, increasing the generating system peak load and placing electric utilities at the mercy of bad weather conditions. Much solar energy research has dealt with the design and construction of individual solar heating systems but has failed to address these potential problems of the large-scale effects of solar energy on electric utilities. In order to evaluate these problems, solar energy research must be coupled with the capability of evaluating generating capacity and electric demand over a realistic planning period. Methods of incorporating solar energy coupled loads into generation planning research have been developed at Rensselaer Polytechnic Institute. An hour-by-hour simulation of a solar-assisted heat pump which utilizes actual weather data is combined with data of the New York State electric power load for the corresponding hours. This information is then processed with a generation planning model that utilizes linear programming to calculate the corresponding optimum generation and operating strategy. This data is then post-processed to determine the implication of solar heating on power generation and primary fuel requirements. By combining actual weather and electric demand data with forecasts of future power generation and electric heating use, a realistic projection of solar heating's impact on New York State utilities is evaluated over the 1980 to 1999 planning period. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Series Capacitor Controls and Settings as Countermeasures to Subsynchronous Resonance

    Page(s): 1281 - 1287
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1470 KB)  

    The investigation of subsynchronous resonance (SSR) [1] by utilities and manufacturers has resulted in proposed and applied methods to mitigate or eliminate SSR damage to turbine- generators. A companion paper [1] presented many of the methods and devices that can be used as countermeasures, solutions or mitigators for the SSR problem, but left to this later paper a discussion of the place of series capacitor controls and settings. The control or adjustment of series capacitors as an SSR countermeasure has also received much attention. This report presents the most common system conditions which lead to large shaft oscillatory torques for turbine- generators connected to series-compensated transmission systems and describes the series-capacitor controls and settings which have been applied or proposed, as countermeasures to limit such torques and torsional interaction [2]. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Study of Universal Motors with Lag Angle Brushes

    Page(s): 1288 - 1296
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2244 KB)  

    A drawing procedure of vector diagrams is presented for the performance analysis of universal motors with lag angle brushes. Using this procedure, some examples are described. They are brush voltage drop, leakage reactance, iron loss angle, and mechanical loss separation etc. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Model for the Evaluation of Impact on Electric Power Systems by Pollution in Mexico City

    Page(s): 1297 - 1304
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1182 KB)  

    In order to completely evaluate alternative solutions to the problems caused by pollution on power systems it is necessary to place these solutions in a proper economic reference frame. A comprehensive model has been developed to provide a means to ascertain the economic impact of pollution and the cost of some alternative solutions. Four separate areas of Mexico City which utilize a 23 kV distribution system have been used as test cases for verification of the proposed model. The results obtained are presented here. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shunt Capacitor Bank Protection Methods

    Page(s): 1305 - 1312
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1363 KB)  

    A "Guide for Protection of Shunt Capacitor Banks," ANSI/IEEE Standard C37.99-1980, has been prepared recently by the, Power System Relaying Committee to assist in the effective application of relays for the protection of shunt capacitor banks used in substations. The various protective considerations along with recommended and alternate methods of protection for the most commonly used capacitor bank configurations are covered. The purpose of this paper is to review some of the highlights of the guide to familiarize the industry with the scope and usefulness of this new document, and to invite considered discussion for the purpose of improving this guide in the future. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Start-Up, Testing, and Performance of the First Bulb-Type Hydroelectric Project in the U.S.A.

    Page(s): 1313 - 1321
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1472 KB)  

    The first bulb-type hydroelectric project in the USA has been completed on the Columbia River near Wenatchee, Washington. This paper discusses the initial start-up, testing and performance of the bulb-type units. Also discussed are operation of the hydraulically operated draft tube gates and their role in the unique sluicing operation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Two-Step Compensation Method for Solving Short Circuit Problems

    Page(s): 1322 - 1331
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1869 KB)  

    This paper reports on the development of a unified approach for the solution of all types of short circuit problems. The basic approach is to consider a fault condition -- a fault type or combination of fault types and associated line outages -- as modifications to the parameters of the branches of the prefault network. An extension, referred to as the two-step compensation method, of the conventional compensation scheme was developed to account for the balanced and unbalanced nature of-the modifications that networks undergo when faulted. The computationally efficient solution scheme was derived by using a decomposition of the modifications according to their balanced and unbalanced nature and exploiting the structural properties of the short circuit problem, notably sparsity. The solution approach is particularly useful for system-wide studies, in which specified fault conditions at a set of specified fault locations are analyzed sequentially, on large systems. A noteworthy feature of the proposed methodology is the natural manner in which mutuals are handled. Results of the application of this approach to investigate a variety of fault conditions on several systems, including a 2278 bus network, are presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic Analysis of Power Systems with Multiterminal HVDC Links and Static Compensators

    Page(s): 1332 - 1341
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1674 KB)  

    The paper presents a generalized small signal model of a multinode power system having multiterminal HVDC links and thyristor controlled static compensators. This model is suitable for the application of modal control techniques for centralised dc power modulation to improve the dynamic stability of the ac-dc system. For practical implementation of the centralised controller, proportional-plus derivative feedback of the output states have been used to shift the dominant modes to prescribed locations. Further a decentralised control scheme based on the control of the static compensator alone and a combination of both static compensator and dc power modulation have been presented in this paper to bring out the differences between the two approaches. An eigenvalue search has been used to optimize the controller gains. Simulation results for a 3-terminal system are presented to highlight the important features of both the modal control and dc power modulation along with reactive power control schemes. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Universal Machine Modeling for the Representation of Rotating Electric Machinery in an Electromagnetic Transients Program

    Page(s): 1342 - 1351
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3003 KB)  

    This paper describes the theory, development and practical application of a new universal machine module, which can be used for the transient analysis of motor/generator phenomena in large and complex power networks. In the general case, doubly-fed electric machines with an arbitrary number of coils and magnetic saturation can be represented. Included are all of the major classes which are of common industrial interest: synchronous and induction machines of 1, 2, or 3 phases, and dc machines. A procedure for maximizing the flexibility of the machine-network interface is explained. Computer implementation has been variably- dimensioned, so that any number of motors or generators can be interconnected with mechanical systems and electric networks of arbitrary size and configuration. Universal machine modeling is now a standard feature of the BPA Electromagnetic Transients Program (EMTP), which is widely used on numerous different computers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Investigation on Test Method of DC XLPE Cable

    Page(s): 1352 - 1362
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2317 KB)  

    There is no standard specification for type test on dc cables except one recommended by CIGRE SC-21 for oil impregnated paper insulated cables up to 600kV. In Japan 250kV class XLPE dc cables were manufactured and subjected to a long term test program including the type test mentioned above. As a result it seems that this type test is not suitable for XLPE cables. This paper presents a new consideration in voltage withstand test for XLPE dc cable based on dc insulation characteristics of XLPE. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Life Performance of Zinc-Oxide Elements Under DC Voltage

    Page(s): 1363 - 1368
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (924 KB)  

    The voltage-current, watt loss, and characteristics of three kinds of ZnO elements were compared when subjected to ac and dc voltages. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Matrix Representation of Three-Phase N-Winding Transformers for Steady-State and Transient Studies

    Page(s): 1369 - 1378
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1733 KB)  

    Detailed transformer representations are needed in the analysis of electromagnetic transients and in the analysis of unbalanced steady-state conditions. This paper describes the derivation of mdels for three- phase and single-phase N-winding transformers in the form of branch impedance or admittance matrices, which can be calculated from available test data of positive and zero sequence short-circuit and excitation tests. The models can be used for many types of studies as long as the frequencies are low enough so that capacitances in the transformer can be ignored. The inclusion of saturation effects is briefly discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Physical Model of Electric Aging and Breakdown of Extruded Pplymeric Insulated Power Cables

    Page(s): 1379 - 1390
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2627 KB)  

    This paper postulates a physical model of electric aging and breakdown of polymeric insulated high voltage cables and substantiates this model with results of tests. In accordance with the model, scission of molecular chains and formation of craters at discharging voids are responsible for the electric aging and voltage breakdown of polymeric insulation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimation of Burn-Through Probability in SF6 Insulated Substations

    Page(s): 1391 - 1399
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1592 KB)  

    Enclosure burn-through in SF6 insulated substations is a rarely occurring event; however, in view of the possibly damaging effects to equipment and personnel, its probability of occurrence warrants a closer examination. This paper presents a model for estimating the likelihood of enclosure burn-through or pressure relief disc bursting during an in-service fault in SF6 substations. Results of a simulation show a 25% burn-through probability per fault in substations with the most probable fault currents in the 50 kA range. The probability of personnel being exposed to the hazardous arcing by-products is discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automatic Adjustment of Generator Voltages in Newton-Raphson Mehtod of Power Flow Solutions

    Page(s): 1400 - 1409
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1639 KB)  

    A method of considering the reactive power (var) limits of generators and their voltage adjustments, as a part of the Newton-Raphson power flow solution, is presented in this paper. The approach considers an extended Jacobian matrix of the standard Newton- Raphson method to include these variables in the problem formulation. Then, by suitable matrix manipulation techniques, the procedure estimates the generator voltage adjustments required to eliminate respective var limit violations. By the use of an efficient logic, the procedure limits the voltage adjustments to a minimum number of generators. The proposed technique complements other automatic adjustment features such as area interchange, transformer tap and phase-shifter controls that are already available with the Newton-Raphson technique. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Survey of Cyclic Load Capabilities of Fossil-Steam Generating Units

    Page(s): 1410 - 1419
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1754 KB)  

    The current practice of placing large-size fossil and nuclear steam-generating units into commercial operation will continue unabated for at least the next 10 years. Such units, intended primarily for base-load operation, generally do not have large load-turndown and two-shift cycling capabilities. Consequently, a loss of operating flexibility is slowly being created with potential future problems for power system operation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Strategic Planning for Power System Reliability and Vulnerability: An Optimization Model for Resource Planning Under Uncertainty

    Page(s): 1420 - 1429
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1871 KB)  

    This paper describes a mathematical optimization model for analyzing a complex problem in power systems planning-evaluation of the cost effectiveness of alternate resource plans that provide an adequate level of peak and strategic reliability. Strategic reliability refers to the vulnerability of the power system to uncertain events such as fuel supply disruptions and unanticipated load growth that leads to adverse mis-matches in supply and demand for power. The model has been used to analyze key issues related to strategic resource planning for reliability, contingency planning, and vulnerability assessment for a major Power Pool in the East. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Human Factors Review of Dispatch Control Centers

    Page(s): 1430 - 1439
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1845 KB)  

    This paper is one of a series prepared for use in Current Operational Problems (COPS) forums with the goal of focusing the attention of the industry on high priority problems faced by those who are involved in the actual operation of power systems. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Qualification Testing of Insulated Aerial Devices Rated 69 kV and Below

    Page(s): 1440 - 1446
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2125 KB)  

    Laboratory and field measurements were made at the American Electric Power System facilities to compare the three methods commonly used in the industry for testing insulation of an aerial lift device rated for live-line maintenance work at 69 kV and below. Charging current was measured into the bucket of an insulated 69 kV aerial lift truck, from the truck body to ground, and from permanently installed electrodes in the insulating boom section. The results from one set of field measurements on a 69 kV transmission line compare the three methods, for which current values were 400 ¿A, 168 ¿A and 8 ¿A, respectively. Of the three methods used, the permanently installed electrodes is the only method that adequately approaches the true leakage current through the boom insulation. Tests also demonstrated that the addition of a shield over the electrode (collector band) increased the measurement resolution by reducing the current reading by about 50%. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Characteristics of Geomagnetically Induced Currents in the B. C. Hydro 500 kV System

    Page(s): 1447 - 1456
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1805 KB)  

    The spectral and spatial characteristics of the geomagnetic field variations and electric field variations are considered in relation to their effect on the resulting geomagnetically induced currents (GIC's) that flow in power systems. Field data on GIC's obtained on the B. C. Hydro 500 kV system are shown to be consistent with the characteristics of the inducing fields. It is shown that because of the spatial characteristics of the electric field, actual GIC's may be higher than would be predicted using the assumption of a uniform electric field throughout the power system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transformer Response to System Switching Voltages

    Page(s): 1457 - 1470
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4176 KB)  

    A section of an actual power system was modelled on a Transient Network Analyzer for the purpose of defining high frequency transient voltages occuring during switching events. The variety of system switching events which were staged produced oscillatory voltages covering a broad band of frequencies. On a digital model of the system autotransformers it was demonstrated that such oscillatory voltages could excite internal natural frequencies, but none of the actual generated waves coincided closely with the particular transformer natural frequency. However, if the applied waveshapes were frequency-scaled to a closer match, internal response voltages of concern could be developed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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