NDLI: Substation Voltage Upgrading

Content Provider	IEEE Xplore Digital Library
Author	Panek, J. Elahi, H.
Copyright Year	1981
Abstract	Conversion of lines and substations to higher voltage has emerged in the industry as a viable alternative in meeting load growth or transmission requirements. This somewhat unconventional approach offers several advantages. Beyond the practical aspects such as use of available right-of-way and substation site, the economic advantages may be of considerable interest, particularly if some of the original foundations, structure, or equipment can be used with minimal modifications. In recognition of utility industry's needs, Electric Power Research Institute (EPRI) has initiated a research project on "substation voltage upgrading" (RP2794-1). The objective of this project is to explore the possibilities of and to develop methods for substation voltage conversion. This paper summarizes the early findings of this project, including the results of a utility survey and the review of present industry practices and standards. Survey of 48 North American utilities has shown that there exist considerable voltage conversion activities for substations rated up to 242 kV. However, the practice of substation voltage "uprating" (i.e., using some of the original equipment or existing layout/BIL) is very rare, as opposed to complete substation rebuilding, or voltage "upgrading." The present practices in substation insulation design are based on standards, some of which date back to older technologies in overvoltage protection and smaller economic incentives to utilize available margins at lower operating voltages. Figure 1 illustrates the relationships between per unitized recommended BILs versus rated maximum voltage. Since both scales are logarithmic, a constant BIL appears as a straight line.
Starting Page	55
Ending Page	55
Page Count	1
File Size	315409
File Format	PDF
ISSN	02721724
Volume Number	9
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-07-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power generation economics Electrical equipment industry Senior members Voltage control Substation protection Arresters Power transformer insulation Transformers, Regulators and Reactors - c57 Power engineering
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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