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Power Apparatus and Systems, IEEE Transactions on

Issue 6 • Date June 1984

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Displaying Results 1 - 25 of 61
  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1984 , Page(s): c1 - 1536-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1984 , Page(s): c2
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    Freely Available from IEEE
  • Electric Distribution Protection Problems Associated with the Interconnection of small, disperesed Generation Devices

    Publication Year: 1984 , Page(s): 1121 - 1127
    Cited by:  Papers (22)
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    This paper discusses the results of simulating three potential protection problems associated with the interconnection of rotating-type, small dispersed storage and generation (DSG) devices to the electric distribution system. These simulations were performed as part of a study to address the-adequacy of the electric utility industry's present protection practices and hardware for distribution systems with DSG. The simulations considered phenomena such as the effect of dispersed generati, on infeed on the coordination of fuses, resonance of an isolated section of feeder with a three-phase DSG device, and the islanding of a DSG device on an isolated feeder. The phenomena were simulated for a 12. 47 kV feeder with DSG. A digital computer program was used to calculate the transient currents and voltages produced on the feeder for the three types of phehomena. Results of the simulations indicate that these are concerns which should be considered by electric utilities in the connection of dispersed generation sources to the electric distribution system. View full abstract»

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  • Coordination of Reactive Power Sources to Correct Bus Voltage Violations inan AC-DC System

    Publication Year: 1984 , Page(s): 1128 - 1134
    Cited by:  Papers (2)
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    The paper presents a formulation for coordinating all controll-able reactive power sources, including the DC converters of a multiterminal DC system, to correct bus voltage violations. Based on the formulation, an algorithm using Linear Programming solution technique has been developed. The effectiveness of this algorithm to correct bus voltage violations in a 30 bus, 5 DC terminal AC-DC system under heavy and light load conditions is demonstrated. View full abstract»

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  • Study of Fast Synchronous-Reclosing Method for Parallel AC Line Fault in AC/DC Poer Transmission System

    Publication Year: 1984 , Page(s): 1135 - 1141
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    In the AC/DC parallel system, AC power system is separated into two areas by the parallel AC line trip. As a result, it is necessary to recover from asynchronous operation. A method to close tripped AC line, "Fast synchronous-reclosing method", is proposed here. This paper consists of two parts: (1) Calculation of the frequency difference limit between the two areas. Energy function is formulated on the condition that fast synchronous-reclosing can be completed satisfactorily. (2) Confirmation of the performance of the fast synchronous-reclosing method in the AC/DC parallel line and frequency control before synchronous-reclosing and damping control of the power swing after reclosing, which were studied using an AC/DC simulator. View full abstract»

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  • Integrating Dispersed Storage and Generation(DSG) with an Automated Distribution System

    Publication Year: 1984 , Page(s): 1142 - 1146
    Cited by:  Papers (11)
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    Dispersed storage and generation (DSG) devices connected to an electric distribution system can cause operational problems-reenergization of distribution feeders under repair by utility personnel production of harmonics by DSG power inverters, and voltage regulation because of fluctuating DSG generation¿on an electric utility system. Many of these problems can be overcome by carefully applied automated control schemes. This paper discusses both emergency-and normal-state operations for distribution systems with DSG devices and presents concepts for improving these operations by applying automated control schemes. View full abstract»

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  • Simulation Methods for Optimum Performance Estimation of Analog and Computer Impedance Relays

    Publication Year: 1984 , Page(s): 1147 - 1154
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    This paper develops state models for estimating the optimum performance of analog and computer impedance relays in the presence of noise due to non-fundamental frequency components. An Extended Kalman filter is used to determine the optimum estimates and error covariance of impedance magnitude and phase angle. lt is shown that impedance relays have performance limits dependent upon the amount of noise present. The effects of sampling rate of input signals, data-window used for fault detection, and cut-off frequency of anti-aliasing filter on the performance of a computer relay are also investigated. Digital computer simulation results for both analog and computer impedance relays are presented. View full abstract»

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  • Direct Measurement of Transformer Winding Hot Sport Temperature

    Publication Year: 1984 , Page(s): 1155 - 1162
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5572 KB)  

    Fiber optic temperature sensors were embedded diarectly within the windings of a large auto-transformer to measure hot spot temperatures under a variety of loading conditions. Numerous application problems were encountered, but a substantial amount of usable data was acquired. Sensor readings correlated well with the results from other measuring devices in locations where a direct comparison could be made. It was demonstrated that accurate conductor temperature data can be obtained, but that probe insertion methods are critical. View full abstract»

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  • Marginal Cost Method for Deterministic Hydro Scheduling

    Publication Year: 1984 , Page(s): 1163 - 1169
    Cited by:  Papers (1)
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    A new approach is presented, based on marginal cost methods, for solving the deterministic hydro-scheduling problem. The original dynamic scheduling problem is converted to a resource allocation problem. Several trajectory constraint rules are developed to guarantee the feasibility and optimality of the solution. The basic method is extended to multi-reservoir scheduling problems. These methods are shown to be very computationally efficient. View full abstract»

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  • Hierarchical Economic Dispatch for Piecewise Quadratic Cost Functions

    Publication Year: 1984 , Page(s): 1170 - 1175
    Cited by:  Papers (42)
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    This paper presents a method to solve the economic power dispatch problem with piecewise quadratic cost functions. The solution approach is hierarchical, which allows for decentral i zed computations. An advantage of this approach is the capability to optimize over a greater variety of operating conditions. Traditionally, one cost function for each generator is assumed. In this formulation multiple intersecting cost functions are assumed. This method has appl ication to fossil generation units capable of burning gas and oil , as well as other problems which result in multiple intersecting cost curves for a particular unit. The results show that the solution method is practical and valid for real-time application. The motivation for this research stems from the actual operational and planning problems of a large Southwestern Utility. View full abstract»

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  • Bibliography on Distribution Automation 1969-1982

    Publication Year: 1984 , Page(s): 1176 - 1182
    Cited by:  Papers (1)
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    A bibliography of 161 articles on distribution automation is presented. The articles referenced cover the period from 1969 through 1982 and represent publications originating in North America. The bibliography is presented in two parts. The first part gives a listing by year of the references. The second part gives a subject organization for the bibliography and a cross-index by subject. View full abstract»

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  • Computer-Aided Planning of Distribution Substation and Primary Feeders

    Publication Year: 1984 , Page(s): 1183 - 1189
    Cited by:  Papers (31)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1239 KB)  

    This paper presents an improved technique for optimal planning of substations and primary feeders in power distribution systems. The technique employs an accurate, time-phased cost model and incorporates a flexible planning formulation which suits detailed analysis of limited sized distribution networks as well as approximate analysis of large scale distribution networks. The cost model includes explicit time-dependent fixed and variable charges for planned facilities as well as the cost of power losses. The planning formulation incorporates user-defined constraints on voltage drop in primary feeders. Constraints on radial power flow are automatically set by the algorithm. The planning problem is solved using an advanced, sparsity-based mixed-integer linear programming code. View full abstract»

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  • Comparison Tests of Fourteen Distribution load Forecasting Methods

    Publication Year: 1984 , Page(s): 1190 - 1197
    Cited by:  Papers (27)
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    Fourteen methods of forecasting future distribution system loads are tested in a uniform comparison of forecast accuracy, data needs, and resources.Concentration is on comparison of techniques compatible with modern computer and distribution engineering systems Evaluation is based on usefulness as a planning tool, forecast accuracy, and cost of application. Results are generalized as to applicable situations as a function of utility size and growth rate. View full abstract»

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  • Evaluation of Load Management Effects on Distribution System Design

    Publication Year: 1984 , Page(s): 1198 - 1204
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    This paper describes methods of analysis that were developed to evaluate the effects of load management on distribution system design and operation. The procedures are sufficiently general to allow application to most distribution systems, for residential and small commercial and industrial loads. View full abstract»

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  • Statistical Test of Energy Saving Due to Voltage Reduction

    Publication Year: 1984 , Page(s): 1205 - 1210
    Cited by:  Papers (16)
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    A number of utilities have conducted field tests of the effect of distribution voltage reductions on energy consumption. The tests have been interpreted as giving mixed results. This paper reviews eight tests and statistically analyzes the results. These tests consistently support significant energy savings as a result of voltage reduction. Percent energy savings for each 1% reduction in voltage average 0.76%, 0.99%, and 0.41% for residential, commercial, and industrial class loads, respectively. View full abstract»

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  • New Facilities for Phase-to-Phase Switching Impluse Tests and Some Test Results

    Publication Year: 1984 , Page(s): 1211 - 1216
    Cited by:  Papers (7)
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    CRIEPI has constructed new test facilities at the UHV Shiobara Laboratory in order to carry out full-scale switching impulse flashover tests of UHV transmission lines. The facilities consist of a new impulse generator, an extant impulse generator, an automatic control and measurement system, and towers for specimens. View full abstract»

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  • Economics of Energy Storage Devices in Interconnected Systems - A New Approach

    Publication Year: 1984 , Page(s): 1217 - 1223
    Cited by:  Papers (1)
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    The simulation of energy storage devices in power systems for economic analysis has generally been attempted as a linear program formulation. This report suggests a new method that includes the effect of machine outage and non-linear nature of cost of production of energy. The probability density function (PDF) of hourly loads is the starting point of the method. The method has proposed the concepts of shifting the PDF to a "target" to honor the energy constraints and has shown that the modifications to the PDF can be easily obtained from the cumulative distribution function (CDF) View full abstract»

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  • Resonance in Long Distance Radial Transmission Lines with Static Var Compensation Part I-Frequencies and Mode Shapes

    Publication Year: 1984 , Page(s): 1224 - 1232
    Cited by:  Papers (3)
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    As subsynchhronous resonance and torsional interactions are dangers to be avoided at all costs, it would be reassuring if the resonance frequencies of static VAR compensated transnission lines are all supersynchronous. But are they? Part I provides the groundlwork to the answer, by developing the mathematical tools for the study of the resonance phencmenon based on the iteraction of the shut compensation reactance with the transmission line equations. In order that the actual complexities do not overshadow the fundauental concepts involved, idealistic models are used so that the mathematical relations are simple enough as to provide analytical insights-into the inter-play of basic parameters. Part II proves that a. supersynchronous resonant frequency limit exists. View full abstract»

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  • Resonance in Long Distance Radial Transmission Lines with Static Var Compensation Part II-Supersynchronous Limit

    Publication Year: 1984 , Page(s): 1233 - 1241
    Cited by:  Papers (3)
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    Having developed the background for understanding and analysing the resonance phenanenon-in shunt reactance canpensated transmission line in Part I, this paper proceeds to prove that a supersynchronous resonance frequency limit exists. Based on the model of equal length line sections, this limit occurs at the power angle of 1800. The mathematical framework for analysing resonant frequencies for unequal line sections has also been developed and the numerical results show that the. supersynchronous limit may even occur at power angles less than 180°. View full abstract»

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  • Power System Economic Dispatch Via Network Approach

    Publication Year: 1984 , Page(s): 1242 - 1248
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (924 KB)  

    A new approach, using the bus incremental costs as the key variables to solve the economic dispatch problem of power systems is proposed in this paper. This approach maintians the system configuration, and all the relevant variables (generator schedules and line flows) can be expressed simply in terms of bus incremental costs. By the application of this approach, the problem of economic dispatch is easily converted to a concise set of quasi-linear equations resulting in a solution form which is similar to that of the electric network. This enables one to apply any readily available high speed special large system solution algorithm to handle the dispatching problem. The generation and the transmission limits also can be included in the solution process. View full abstract»

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  • Functional Model of Two-Terminal HVDC Systems for Transient and Steady-State Stability

    Publication Year: 1984 , Page(s): 1249 - 1255
    Cited by:  Papers (5)
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    This committee report documents two-terminal HVDC system model structures for power system stability analysis. These-models are intended for steady-state and transient stability analysis. The DC system structures are limited to two-terminal links; however, the modularity of the control systems will make extension to multi-terminal systems relatively easy. The modularity of the structure will also facilitate the incorporation of newer control schemes for AC/DC systems. View full abstract»

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  • Feasibility of DC Transmission with Forced communication to Remote Loads

    Publication Year: 1984 , Page(s): 1256 - 1262
    Cited by:  Papers (11)  |  Patents (1)
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    Previous researchers have analysed the forced commutated HVDC inverter and have concluded that it could be used to meet the reactive power at the inverter terminals. This investigation is a further technical appraisal involving a two terminal transmission scheme to a remote load with no ac generation at the load. Several possible inverter configurations are discussed. View full abstract»

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  • Impedance and Loss Distribution of Multiple-Deck-Shaped Conductor with IDLE Loop in a Variable Width Slot

    Publication Year: 1984 , Page(s): 1263 - 1269
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    It is familiar that the calculation of the rotor-conductor deep-bar effect of an induction motor is well established. View full abstract»

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  • The Application of N-Phase Generalized Rotating Field Theory to Induction Machines with Arbitrary Stator Winding Connection

    Publication Year: 1984 , Page(s): 1270 - 1276
    Cited by:  Papers (1)
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    N-phase theory applicable to the calculation of the steady state performance of squirrel cage induction motors with arbitrary staor winding connection is presented. The internal voltage equations of the machine incorporate the effects of space harmonics, different turns ratios and angular asymmetry, while the external voltage and current equations incorporate a connection matrix which defines the specific winding arrangement. View full abstract»

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  • Dynamic Performance Analysis of Permanet Magnet Synchronous Motors Magnet Synchronous Motors

    Publication Year: 1984 , Page(s): 1277 - 1282
    Cited by:  Papers (19)
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    Unlike conventional synchronous motors, a permanent magnet motor develops considerable break torque during its asynchronous mode of operation. An accurate prediction of the run-up characteristics of these motors is quite important. This paper presents the results of digital computer simulation of the transient performance of P.M. synchronous motors. This is achieved by the numerical solution of the machine dynamic equations including the effects of saturation. A discussion is provided to show the influence of various design parameters on the motor dynamic performances. Finally test results are included also to show the close agreement between calculated and measured results. 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