By Topic

# IEEE Transactions on Power Delivery

## Filter Results

Displaying Results 1 - 25 of 68

Publication Year: 2008, Page(s):C1 - 1270
| PDF (104 KB)
• ### IEEE Transactions on Power Delivery publication information

Publication Year: 2008, Page(s): C2
| PDF (39 KB)
• ### Fiber-Optics-Based Fault Detection in Power Systems

Publication Year: 2008, Page(s):1271 - 1279
Cited by:  Papers (10)
| | PDF (760 KB) | HTML

A fiber-optics-based sensing network applicable for fault detection in power system is presented. The proposed scheme is secure and immune from interferences. At each monitoring location, passive rugged fiber-Bragg-grating-based sensors are deployed. They use fast and compact magnetostrictive transducers instead of current or potential transformers to translate current-induced magnetic field into ... View full abstract»

• ### Fundamental Phasor Calculation With Short Delay

Publication Year: 2008, Page(s):1280 - 1287
Cited by:  Papers (11)
| | PDF (362 KB) | HTML

Fundamental phasors are used to monitor and control power systems. The conventional method of calculating the phasors is using a Fourier transform, which introduces a delay of at least one fundamental cycle. This paper examines the feasibility of exploiting an alternative using a direct-quadrature (DQ) transformation to calculate the phasors by extracting the fundamental component from a three-pha... View full abstract»

• ### New Method of Live Line Measuring the Inductance Parameters of Transmission Lines Based on GPS Technology

Publication Year: 2008, Page(s):1288 - 1295
Cited by:  Papers (18)
| | PDF (325 KB) | HTML

Based on global positioning system (GPS) technology and differential equation algorithms, a new approach to live line measuring of the inductance parameters of transmission lines with mutual inductance is proposed. The principles and mathematical model of the new method are explained in detail. Data processing by least square algorithm is introduced. To take into account the influence of distribut... View full abstract»

• ### The Measurement of Reactive Energy in Polluted Distribution Power Systems: An Analysis of the Performance of Commercial Static Meters

Publication Year: 2008, Page(s):1296 - 1301
Cited by:  Papers (18)
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This paper presents a comparative analysis of the performances of both a traditional induction meter and various types of commercial static meters for reactive energy in the presence of harmonic distortion. This is a topical issue, since there are several types of static meters on the market, based on different principles of construction. In accordance with current standards, these meters are desi... View full abstract»

• ### Development and Investigation of a New High-Speed Directional Relay Using Field Data

Publication Year: 2008, Page(s):1302 - 1309
Cited by:  Papers (18)
| | PDF (659 KB) | HTML

In this paper, a new high-speed directional relay is proposed. The relay is based on the current and voltage signals before and after fault occurrence. The voltage signal is compensated and then used as a reference. The relay is used for the directional comparison protection of extremely high voltage transmission lines. An evaluation of the suggested directional relay is investigated using recorde... View full abstract»

• ### Impact of Waveform Distorting Fault Current Limiters on Previously Installed Overcurrent Relays

Publication Year: 2008, Page(s):1310 - 1318
Cited by:  Papers (8)
| | PDF (963 KB) | HTML

This paper investigates in detail the impacts of distorted current waveforms, produced by certain types of fault current limiters on time-overcurrent protection relays. A thyristor-based solid-state fault current limiter is chosen as representative of such a device for a case study which investigates its effects on two coordinated protection relays. A detailed software model of the current limiter... View full abstract»

• ### Ground Distance Relaying With Fault-Resistance Compensation for Unbalanced Systems

Publication Year: 2008, Page(s):1319 - 1326
Cited by:  Papers (35)
| | PDF (484 KB) | HTML

Fault resistance is a critical variable in distance relaying. If not considered due to underreaching phenomenon, it may cause the misoperation of ground distance relays for internal faults. Still, as a consequence of the overreaching phenomenon, the unbalanced nature of loads and asymmetry of lines can affect the distance protection operation efficiency. Mainly due to these aspects, there is low p... View full abstract»

• ### Ultrasaturation Phenomenon in Power Transformers—Myths and Reality

Publication Year: 2008, Page(s):1327 - 1334
Cited by:  Papers (11)
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In this paper, the ultrasaturation phenomenon of power transformers during their energization is studied. It is shown that under special conditions, the currents observed after transformer switching on do not contain enough restraining information (e.g., second harmonic), which may lead to protection maloperation. This paper concentrates on a thorough explanation of the problem and possible causes... View full abstract»

• ### Identifying the Primary Fault Section After Contingencies in Bulk Power Systems

Publication Year: 2008, Page(s):1335 - 1342
Cited by:  Papers (23)
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This paper deals with the problem of fault section estimation in electric power systems, undertaken at a control center level and using information about the operation of protection relays and circuit breakers. The developed methodology should be used after the occurrence of contingencies with definitive disconnections, and before beginning the process of network restoration. Due to the absence of... View full abstract»

• ### Modeling and Protection of Hexagonal Phase-Shifting Transformers—Part I: Short-Circuit Model

Publication Year: 2008, Page(s):1343 - 1350
Cited by:  Papers (4)
| | PDF (889 KB) | HTML

Owing to several advantages over traditional phase shifters, applications of hexagonal phase-shifting transformers (PSTs) keep expanding. These transformers are built with unique connections of their windings, neither delta nor wye. Short-circuit modeling and analysis methods are not yet fully established for hexagonal phase shifters. This work is divided into two parts. In this part, a digital mo... View full abstract»

• ### Modeling and Protection of Hexagonal Phase-Shifting Transformers—Part II: Protection

Publication Year: 2008, Page(s):1351 - 1358
Cited by:  Papers (7)
| | PDF (206 KB) | HTML

Owing to several advantages over traditional phase shifters, applications of hexagonal phase-shifting transformers (PSTs) keep expanding. These transformers are built with unique connections of their windings, neither delta nor wye. Modeling and protection methods are not yet fully established for hexagonal phase shifters. This work is divided in two parts. In Part I, a digital model of a hexagona... View full abstract»

• ### Under-Reach Correction in Twin Circuits Without Residual Current Input From the Parallel Line

Publication Year: 2008, Page(s):1359 - 1365
Cited by:  Papers (3)
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Mutual coupling poses difficult problems witnessed during single phase to earth fault, in transmission line protection. In parallel lines on the same right of way, mutually coupled zero-sequence circuits cause error in the apparent impedance seen by the relay. This causes the distance relay at one end of the faulty line to over-reach while the one at the other end to under-reach. Incorrect sensing... View full abstract»

• ### A Universal Fault Location Technique for N-Terminal $({N}geqq 3)$ Transmission Lines

Publication Year: 2008, Page(s):1366 - 1373
Cited by:  Papers (23)
| | PDF (340 KB) | HTML

This paper presents a universal fault location technique for N-terminal transmission lines based on synchronized phasor measurement units. The development of the technique is based on two-terminal fault location technique. The proposed algorithm is different from traditional multiterminal fault location techniques. We apply two-terminal fault location technique to N-terminal transmission lines and... View full abstract»

• ### Analysis of a Sort of Unusual Mal-Operation of Transformer Differential Protection Due to Removal of External Fault

Publication Year: 2008, Page(s):1374 - 1379
Cited by:  Papers (11)
| | PDF (202 KB) | HTML

Several cases of mal-operation of transformer differential protection with second-harmonic blocking after clearance of external fault are reported. These mal-operations all occurred at the nonrestraint region of percentage restraint plane. The previous theory cannot be utilized directly to analyze this phenomenon. Therefore, a mathematical model for analyzing the transient course of external fault... View full abstract»

• ### An Experimental Validation for Broadband Power-Line Communication (BPLC) Model

Publication Year: 2008, Page(s):1380 - 1383
Cited by:  Papers (10)
| | PDF (411 KB) | HTML

Recently, different models have been proposed for analyzing the broadband power-line communication (BPLC) systems based on transmission-line (TL) theory. In this paper, we make an attempt to validate one such BPLC model with laboratory experiments by comparing the channel transfer functions. A good agreement between the BPLC model based on TL theory and experiments are found for channel frequencie... View full abstract»

• ### Assessment of Information Security Levels in Power Communication Systems Using Evidential Reasoning

Publication Year: 2008, Page(s):1384 - 1391
Cited by:  Papers (8)
| | PDF (546 KB) | HTML

The purpose of this paper is to present a framework for assessing information security in power communication systems. The framework consists of dividing the communication system to be analyzed into its subcomponents and linking these to relevant evaluation criteria. In this study, the information security standard ISO 17799 has been used as a point of reference to define such evaluation criteria.... View full abstract»

• ### Indoor Power-Line Communications Channel Characterization Up to 100 MHz—Part I: One-Parameter Deterministic Model

Publication Year: 2008, Page(s):1392 - 1401
Cited by:  Papers (89)  |  Patents (1)
| | PDF (2274 KB) | HTML

Advanced communication technologies have allowed the power-line-communication (PLC) channel to be a transmission medium that enables the transfer of high-speed digital data over the classical indoor electrical wires. The development of PLC systems for Internet, voice, and data services requires measurement-based models of the transfer characteristics of the mains network suitable for performance a... View full abstract»

• ### Indoor Power-Line Communications Channel Characterization up to 100 MHz—Part II: Time-Frequency Analysis

Publication Year: 2008, Page(s):1402 - 1409
Cited by:  Papers (68)  |  Patents (1)
| | PDF (1055 KB) | HTML

Estimations of coherence bandwidth and time-delay parameters from wideband channel sounding measurements made in the 30 kHz-100 MHz band in several indoor environments are described in and taken back in this paper. Powerline communications (PLC) modems rather see a channel which starts almost from 2 MHz . A comparison between coherence bandwidth and time-delay parameters estimated in both frequenc... View full abstract»

• ### Closed-Form Expression of Nakagami-Like Background Noise in Power-Line Channel

Publication Year: 2008, Page(s):1410 - 1412
Cited by:  Papers (13)
| | PDF (354 KB) | HTML

A closed-form expression for the real part of background noise is derived for the power-line channel modeled by Nakagami probability density function. Simulation with various parameters shows the derived expression's validity. The closed-form expression can be of benefit to communication system designers in that it facilitates the design of optimum receiver and its performance evaluation. View full abstract»

• ### A Simple Method for Evaluating Ground-Fault Current Transfer at the Transition Station of a Combined Overhead-Cable Line

Publication Year: 2008, Page(s):1413 - 1418
Cited by:  Papers (9)
| | PDF (266 KB) | HTML

When a substation is fed by a combined overhead-cable transmission line, a significant part of the ground fault current flows through cable sheaths and is discharged into the soil at the transition station where cables are connected to the overhead line. Such a phenomenon, known as ldquofault application transfer,rdquo may result in high ground potentials at the transition station which may cause ... View full abstract»

• ### Impact of Energy End Use and Customer Interruption Cost on Optimal Allocation of Switchgear in Constrained Distribution Networks

Publication Year: 2008, Page(s):1419 - 1425
Cited by:  Papers (2)
| | PDF (496 KB) | HTML

The introduction of new energy carriers, such as natural gas and district heating, to energy systems dominated by electrical power will certainly relieve stress on the power system. Some of the end uses initially served by the power system will be gradually decoupled and served by alternative energy carriers. As a result, the specific customer interruption costs and load profiles will change. In t... View full abstract»

• ### A New Converter Transformer and a Corresponding Inductive Filtering Method for HVDC Transmission System

Publication Year: 2008, Page(s):1426 - 1431
Cited by:  Papers (46)
| | PDF (332 KB) | HTML

A new converter transformer and an inductive filtering method are presented to solve the existing problems of the traditional converter transformer and the passive filtering method of the high-voltage direct current (HVDC) system. It adopts the ampere-turn balance of the transformer as the filtering mechanism. A tap at the linking point of the prolonged winding and the common winding of the second... View full abstract»

• ### Effect of Core Magnetization on Frequency Response Analysis (FRA) of Power Transformers

Publication Year: 2008, Page(s):1432 - 1438
Cited by:  Papers (47)
| | PDF (468 KB) | HTML

This paper presents how the frequency response analysis (FRA) measurements on a transformer can be influenced by magnetization condition of the core. Measurements were performed on two transformers at different magnetization levels to show effects of remanent magnetization in the core due to removal of 3-supply, of relaxation demagnetization and of dc flux on the frequency response of winding impe... View full abstract»

## Aims & Scope

Installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Wilsun Xu
Ph.D., P.Eng.
Dept. Electrical and Computer Eng.
University of Alberta
(9107 - 116 Street)