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Electric Field and Voltage Distributions along Non-ceramic Insulators

Que, Weiguo
http://rave.ohiolink.edu/etdc/view?acc_num=osu1037387155

Abstract Details

2002, Doctor of Philosophy, Ohio State University, Electrical Engineering.
High voltage insulators are essential for the reliable performance of power systems. All insulators are exposed to electrical, mechanical and environmental stresses. Since an increasing number of non-ceramic insulators are employed by utility companies for their transmission lines, the analysis of their performance is relevant. The performance of non-ceramic insulators is important for both dry and wet conditions. Problems with them are related to the degradation of polymer materials used for the insulator, corona phenomena on the surface, and pollution flashover. These problems are related to the electric field distribution. The dissertation research topic is the investigation of electric field and voltage distributions (EFVD) in the vicinity of non-ceramic insulators. A three-dimensional electric field analysis software package, Coulomb, based on the boundary element method, has been employed for the calculations. Main contributions of the research are: 1. Principles of the full and simplified models as well as the calculation models of dry and clean non-ceramic insulators have been developed. 2. Models of the insulators alone are not sufficient. The detailed modeling of several more major components have been found essential. These major components are the power line tower, the three phase conductors, all conductor hardware, and corona rings. 3. A simple model with a flat polymer insulating sheet between two electrodes and a water droplet on it has been used to simulate the behavior of a droplet on the shed and the sheath region, respectively, of a non-ceramic insulator. 4. Nine models of a four-shed non-ceramic insulator exposed to rain or fog conditions have been developed, following observations during and after aging tests in a fog chamber. The electric field and voltage distribution along wet insulators have been calculated and analyzed. 5. Selected calculations on dry and clean insulators using the Coulomb software pac kage have been verified with an electric field strength meter. The correspondence of calculations and measurements has been reasonably good. 6. Several research issues applied to various practical insulator design aspects have been investigated and discussed. The research described in the dissertation is directly applicable to the field of high voltage insulator design and development.
Stephen Sebo (Advisor)
188 p.
High voltage insulators; non-ceramic insulators; electric field and voltage distributions; rain and fog conditions of polymer insulators; electric field enhancement; insulator design aspects.

Recommended Citations

Citations

  • Que, W. (2002). Electric Field and Voltage Distributions along Non-ceramic Insulators [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1037387155

    APA Style (7th edition)

  • Que, Weiguo. Electric Field and Voltage Distributions along Non-ceramic Insulators. 2002. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1037387155.

    MLA Style (8th edition)

  • Que, Weiguo. "Electric Field and Voltage Distributions along Non-ceramic Insulators." Doctoral dissertation, Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1037387155

    Chicago Manual of Style (17th edition)

osu1037387155
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© 2002, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.