Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Charles L. Wagner"'
Autor:
Charles L. Wagner, H. M. Smith
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :3353-3363
The basis for TRV standards both ANSI and IEC were developed about twenty years ago. While the requirements are similar, there are significant differences. These differences are examined with some of the assumptions behind them. With the recent empha
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :1005-1014
Although the use of line-entrance lightning arresters provides absolute protection for an open breaker condition, it represents a costly installation. No line entrance protection represents some risk of breaker damage. Line entrance rod gaps offer a
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :547-553
Modem generator excitation systems provide good voltage regulation at normal system frequency and assist in maintaining transient stability during disturbances. However, a number of abnormal system operating conditions should be considered in evaluat
Autor:
Charles L. Wagner, J. W. Bankoske
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :698-707
The switching surge insulation level of steel tower and wood pole transmission lines operating at system voltage levels of 115 through 500 kV are compared with the switching surge magnitudes that can occur on these systems. High-side and low-side swi
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :1744-1751
Overvoltages on UHV systems may be controlled to a level of 1.5 pu or less. Historically, lightning, line energizing, and line reenergizing overvoltages have been the primary factors in establishing power system design levels. At the new reduced leve
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :628-635
Circuit breakers in this decade will have to satisfy demands, not only for increased ratings but also for reliability, ability to function under multiple contingency situations, reduced environmental pollution, versatility of application, and reduced
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :1032-1044
The results of the first field tests performed to verify the design of the Virginia Electric Power Company 500-kV system are presented. Initial radio influence measurements made on each line section are compared with levels calculated during the desi
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. 83:236-241
A detailed study has been made of the Virginia Electric and Power Copmany (VEPCO) 500-kv transmission sytem to determine optimum insulation levels for the substation equipment. Results of this study depend on both economic and technical consideration
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. 83:402-410
Publikováno v:
IEEE Transactions on Power Apparatus and Systems. :1022-1028
For system voltages above 500 kV the conventional one-step resistor cannot limit switching surge overvoltages to the desired level of 1.7 per unit or less. This paper presents the results of an analog computer study of four possible methods of contro