# IEEE Transactions on Power Delivery

## Filter Results

Displaying Results 1 - 25 of 78
• ### Computer aided design of synthetic test circuits for high voltage circuit-breakers

Publication Year: 1989, Page(s):1049 - 1055
Cited by:  Papers (6)
| | PDF (455 KB)

The authors describe experience acquired in designing test circuits for high-voltage circuits breakers. Circuit synthesis is achieved numerically, using an iterative method which involves the Laplace transform. Different test circuits are considered that are needed to obtain responses specified by ANSI and IEC standards. The specific interactive software has been created to permit automatic synthe... View full abstract»

• ### Discussion, with reply, of "Test results of personal protective grounding on distribution line wood pole construction" by J.T. Bonner, B. Erga, W.W. Gibbs, and V.M. Gregorius

Publication Year: 1989, Page(s):1127 - 1128
| | PDF (825 KB)

Several comments and criticisms are made concerning the above-named work (ibid., vol.4, no.1, Jan. 1989). In particular, the original authors' claim that the personal protective grounds (single-point ground) method is superior to the working ground and bracket ground methods used for worker protection was questioned.<> View full abstract»

• ### Addendum I to bibliography of gas-insulated substations

Publication Year: 1989, Page(s):1003 - 1020
Cited by:  Papers (2)
| | PDF (1240 KB)

A 343 item addendum is provided to the bibliography that was published in 1982 (see ibid., vol.PAS-101, no.11, (1982)). It is divided into three main sections, dielectric characteristics, substation equipment, and general points. A list of authors is also included View full abstract»

• ### Transient analysis of heat dissipation due to a HVDC ground electrode

Publication Year: 1989, Page(s):916 - 920
Cited by:  Papers (8)
| | PDF (240 KB)

The temperature of the soil surrounding a high-voltage direct-current (HVDC) ground electrode was computed at various points in time using finite difference methods. The temperature response for various ground electrodes was computed using these same techniques. The results were then compared with results obtained experimentally in a laboratory. It is suggested that peak temperature calculations m... View full abstract»

• ### Summary of the Guide for AC generator protection' ANSI/IEEE C37.102-1987

Publication Year: 1989, Page(s):957 - 964
Cited by:  Papers (1)
| | PDF (484 KB)

The material contained in ANSI/IEEE Std C37 102-1987 is briefly described, and some examples are presented. The Guide reviews the generally accepted forms of protection for synchronous generators and their excitation systems. It describes the proper application of relays and other devices and serves as a guide for the selection of equipment to obtain adequate protection. The Guide is primarily con... View full abstract»

• ### Effects of DC ground electrode on converter transformers

Publication Year: 1989, Page(s):995 - 1002
Cited by:  Papers (4)
| | PDF (644 KB)

The effects of transferred DC voltage to a converter station ground from the DC ground electrode were studied with a time-domain analysis model of a converter substation and interconnected system. The model explicitly represents all grounds of the system (AC and DC) and the nonlinear magnetization characteristics of the converter transformer. The transferred DC voltage from DC ground electrode to ... View full abstract»

• ### Lightning protection of pole mounted transformers

Publication Year: 1989, Page(s):1087 - 1095
Cited by:  Papers (10)
| | PDF (780 KB)

The authors present an update on Australian experience with recommended lightning protection of distribution transformers, first implemented in 195/6. It is believed that the major reduction in transformer failure rates is directly attributed to the relocation of HV (high voltage) arresters close to the terminals and to the fitting of LV (low voltage) arresters. The recommended protection has virt... View full abstract»

• ### Insulator pollution performance at high altitude: major trends

Publication Year: 1989, Page(s):1461 - 1468
Cited by:  Papers (36)
| | PDF (592 KB)

A survey of the data available from the literature was conducted in order to assess major trends in insulator performance with altitude. The literature comprised tests on individual insulator strings under natural and artificial conditions along with actual live-line performance. The data covered pollution performance as well as the air-gap breakdown performance of insulators under reduced pressur... View full abstract»

• ### International comparison of HV impulse measuring systems

Publication Year: 1989, Page(s):906 - 915
Cited by:  Papers (8)
| | PDF (784 KB)

The authors studied the agreement between laboratory measurements of full and front-chopped lightning impulses at four national laboratories. First, some general information on how standards are maintained and disseminated is presented together with a brief review of the requirements for HV impulse measurements. Then, the comparative measurements made in the four national laboratories are presente... View full abstract»

• ### Ground resistance-revisited

Publication Year: 1989, Page(s):949 - 956
Cited by:  Papers (29)  |  Patents (8)
| | PDF (860 KB)

The nature of ground resistance is examined to explain the high impedance of faults directly to ground as contrasted to conventionally assumed low-impedance ground faults to neutral conductors or to towers with low footing resistance. High-impedance faults are shown to be inherently nonlinear due to the characteristics of soil. This nonlinearity is shown to be different from that of the arcing bet... View full abstract»

• ### Performance assessment and control of power system relaying

Publication Year: 1989, Page(s):986 - 994
Cited by:  Papers (11)
| | PDF (796 KB)

The author outlines various reliability assessment and performance monitoring methods for power system protection. Particular reference is made to the approach adopted for protection performance assessment and control in China Light & Power Company Ltd. because of the special operation when needed' nature of protection relaying, a probabilistic approach for reliability assessment is adopted w... View full abstract»

• ### Studies on structural integrity for separate-cooling/sheet-winding gas-insulated transformer

Publication Year: 1989, Page(s):1079 - 1086
Cited by:  Papers (2)
| | PDF (624 KB)

Research leading to the development of a separate-cooling sheet-winding gas-insulated transformer is described. Basic models and full-scale models were used to conduct tests on the structural strength of the transformer, and the structural integrity of a 300 MVA transformer was investigated. The sheet winding is shown to have excellent characteristics with respect to the electromagnetic forces occ... View full abstract»

• ### Electrical considerations in establishing working clearances for energized line maintenance

Publication Year: 1989, Page(s):1164 - 1174
| | PDF (1016 KB)

Information on factors affecting the electrical performance of large gaps has led to concerns regarding the adequacy of clearances used for live line work. The ESMOL Working Group on Safety reviewed the factors which affect the electrical component of the phase-to-ground working clearances. These factors are reviewed and areas are identified for further research necessary to relate line designs ba... View full abstract»

• ### Post-arc current in high voltage SF6 circuit-breakers when breaking at up to 63 kA

Publication Year: 1989, Page(s):1056 - 1062
Cited by:  Papers (12)
| | PDF (432 KB)

Post-arc current measurements were made on a high-voltage SF6 circuit breaker. A pyrotechnic device was used to protect the measurement shunt. The tests, performed at high current values between 40 and 63 kA, gave post-arc current levels of 0.5 to 2 A. Interpretation of the experimental results by the generalized Mayr model led to the determination of a set of parameters characteristic... View full abstract»

• ### The implications of the electrogeometric model regarding effect of height of structure on the median amplitude of collected lightning strokes

Publication Year: 1989, Page(s):1450 - 1460
Cited by:  Papers (54)
| | PDF (880 KB)

M. Sargent (1972) concluded that the median current of the lightning strokes collected by a structure increases when the height of the structure is increased. In the present work, it is shown that Sargent's conclusion is applicable only to the case of equal striking distances, and that Sargent's use of too low a median current to flat ground has inadvertently exaggerated the effect of height on me... View full abstract»

• ### Effects of voltage impulses on extruded dielectric cable life

Publication Year: 1989, Page(s):829 - 841
Cited by:  Papers (30)
| | PDF (1108 KB)

Laboratory tests were performed to investigate the effects of lightning and thumping impulses on the performance of various 15 kV cable designs. The cable designs were aged in the laboratory using an accelerated water treeing test. Some samples were subjected to lightning impulses, some were subjected to thumping impulses, and some were aged without impulses applied. The impulse effects were evalu... View full abstract»

• ### Reconfiguration of electric distribution networks for resistive line losses reduction

Publication Year: 1989, Page(s):1492 - 1498
Cited by:  Papers (456)  |  Patents (1)
| | PDF (488 KB)

The authors describe a heuristic method for the reconfiguration of distribution networks in order to reduce their resistive line losses under normal operating conditions. The proposed approach is characterized by convergence to the optimum or a near-optimum solution and the independence of the final solution from the initial status of the network switches. The methodology has been implemented in a... View full abstract»

• ### Intermountain Power Project carrier interference study

Publication Year: 1989, Page(s):1205 - 1216
Cited by:  Papers (2)
| | PDF (888 KB)

The authors summarize the results of an interference study performed for the Intermountain Power Project. Interference by noise generated at the converter stations to open-wire carrier telecommunication lines and to power-line carrier systems is investigated. The frequency range considered is 10-200 kHz. The noise level at the converter stations is estimated using a detailed high-frequency digital... View full abstract»

• ### Electromagnetic interference from digital signal transmission on power line carrier channels

Publication Year: 1989, Page(s):898 - 905
Cited by:  Papers (6)
| | PDF (412 KB)

A procedure is presented to evaluate the electromagnetic field generated by a digital transmission system on multiconductor power-line carrier channels. The vertical component of the electric field and the horizontal component of the magnetic field are defined by approximate formulaes of varying accuracy, depending on the frequency and the distance from phase conductors. Field sources are the curr... View full abstract»

• ### RFI source-locating on power lines-an update

Publication Year: 1989, Page(s):1137 - 1144
Cited by:  Patents (3)
| | PDF (880 KB)

The author describes a practical and efficient means for locating RI (radio interference) and TVI (television interference) sources on power lines, particularly those operating below 70 kV, where most complaints originate. The main emphasis is on locating sparking sources on overhead lines, but the location of RFI sources occurring in underground lines and the location of nonspeaking power line so... View full abstract»

• ### Scheme for accelerated trip for faults in the second zone of protection of a transmission line

Publication Year: 1989, Page(s):942 - 948
Cited by:  Papers (9)
| | PDF (584 KB)

A principle of trip acceleration which reaches to the end of the protected line in a multizone impedance protection is described. An impedance unit with zero sequence current as the polarization value which meets performance requirements against over-reach onto the next transmission line, has been developed. The difficult case where the next transmission line is short is discussed. Test results wi... View full abstract»

• ### The simulation of surge corona on transmission lines

Publication Year: 1989, Page(s):1360 - 1368
Cited by:  Papers (12)
| | PDF (608 KB)

The prediction of surge attenuation and distortion by corona on overhead lines is relevant to both insulation design and overvoltage protection. The authors describe a computational procedure to obtain the corona capacitance from the line geometry, thus avoiding the need to impulse-test full-scale line models. The simulation of surge corona loss by a switched capacitor with constant and voltage-de... View full abstract»

• ### Steep-front short-duration voltage surge tests of power line filters and transient voltage suppressors

Publication Year: 1989, Page(s):1029 - 1036
Cited by:  Papers (4)
| | PDF (668 KB)

Steep-front short-duration voltage surge tests were conducted on commercially available power-line filters and two types of transient voltage suppressors to determine their effectiveness for protection against nuclear electromagnetic pulse (EMP) induced power-line transients. The tested power line filters were single-phase industrial-type units in the 120/208 V and 277/480 V class rated at 100 or ... View full abstract»

• ### A hybrid expert system for faulted section identification, fault type classification and selection of fault location algorithms

Publication Year: 1989, Page(s):978 - 985
Cited by:  Papers (70)
| | PDF (840 KB)

The authors present an expert system developed in Turbo PROLOG to identify faulted sections and interpret protective apparatus operation in large interconnected power systems. This expert system is capable of identifying bus faults, line fault sections, and fault sections in the common area of a specific bus and line. Also, the expert system identifies relays or breaker malfunctions. The expert sy... View full abstract»

• ### Validated techniques for modeling shell-form EHV transformers

Publication Year: 1989, Page(s):1070 - 1078
Cited by:  Papers (24)
| | PDF (900 KB)

An EHV (extremely high voltage) shelf-form autotransformer has been thoroughly instrumented and tested for frequency response and step response. The results have been used to develop and validate computer models for predicting the transient behavior of transformers at the design stage. The models are based on relatively simple constant-parameter circuit models. The procedures have been applied to ... 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)