Seed-Based Transformer Dielectric Fluids Provide Safety, Environmental Responsibility, and Longevity
1.TRANSFORMER HISTORY The very first transformers in the late 1800s were open-construction drytype.Almost immediately, the mineral oil transformer was developed to achieve higher efficiency, better heat dissipation,higher resistance to contamination, higher overload capability, reduced size, and much longer life. More than 100 years later, the major electrical utilities, the most knowledgeable transformer users,still use liquid-filled transformers almost exclusively. Mineral oil requires special consideration for transportation, containment, and spill reporting, remediation, and disposal. Due to environmental concerns and fire safety perceptions, vacuum pressure impregnated (VPI) dry-type and cast-resin transformers have often replaced mineral oil-insulated transformers for in-and near-building installations.For industrial applications, the debate over best transformer type and best applications has fluctuated as the technological,environmental, and economic landscapes have changed.Mineral oil-filled transformers continue to be the traditional choice for outdoor applications with well-established characteristics of～165oC (329oF) fire point, increasing environmental regulation, and a 30+ year life. Mineral oils relatively low fire point can lead, and has led, to transformer fires. As a result, liquid-filled transformer safety codes have evolved which require significant layers of deluge-extinguishing systems, long clearance distances, fire barriers, and/or containment. In fact, transformer fires also occur with dry-type transformers.Perceived dry-type and cast-resin fireresistance has resulted in codes allowing these transformers to be installed in sensitive areas with a false sense of safety.
Jonathan Piel Jerry Corkran
国际会议
2008 China International Conference on Electricity Distribution (CICED 2008)(2008中国国际供电会议)
广州
英文
1-4
2008-12-10（万方平台首次上网日期，不代表论文的发表时间）