Improvement of Mechanical and Electrical Strength of the Cap-and-Pin Type String Insulators

帽针式串绝缘子机械和电气强度的提高

• 批准号: 543761-2019
• 负责人: Kordi, Behzad
• 金额: $ 1.82万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680779
• 关键词: Improvement; Mechanical; Electrical; Strength; Cap

Functionality and reliability of electric power transmission systems highly depend on insulators that isolate conductors from each other, the towers, and the ground. The insulators undertake high electrical mechanical stresses for long periods of time. The insulators must maintain their physical properties and mechanical strength over long periods without deterioration. The good performance of insulators results from using proper materials, suitable design, and modern manufacturing technology. The mechanical and electrical characteristics of an insulator are affected by the static mechanical loads (suspension or tension), dynamic mechanical loads (short circuit, wind, and conductor galloping), temperature, and high electric field. The mechanical loads, temperature, and high electric field can degrade the insulators' performance, which will compromise the quality and reliability of the electric power delivered by the transmission line system.Ideally, transmission line insulators should be inspected regularly to ensure maximum service reliability. However, due to the large number of insulators in service (e.g. over 150M porcelain insulators in North America), this is not practical for utility companies. Improvement of insulator design to make them durable for longer life of service has been a topic of interest for many years. The withstand voltage of insulators will be improved by increasing the mechanical, thermal, and electrical strength. The purpose of the proposed research project is to introduce a new method to design high voltage insulator based on finite element method (FEM) and standardized methodologies of electrical and mechanical tests in partnership with Powertech High Voltage Laboratory. The outcome of this research will provide an optimized design for insulators that will improve both their mechanical and electrical withstand. The improved design will enhance the competence and presence of Powertech Labs in high voltage insulator manufacturing industry.

电力传输系统的功能性和可靠性高度依赖于将导体彼此隔离、塔和地面隔离的绝缘体。绝缘体长时间承受高电气机械应力。绝缘子必须长期保持其物理性能和机械强度而不劣化。绝缘子的良好性能来自于使用适当的材料、适当的设计和现代制造技术。绝缘子的机械和电气特性受静态机械负载（悬挂或张力）、动态机械负载（短路、风和导线舞动）、温度和高电场的影响。机械负荷、温度和高电场会降低绝缘子的性能，从而影响输电线路系统输送电力的质量和可靠性。理想情况下，应定期检查输电线路绝缘子，以确保最大的服务可靠性。然而，由于大量的绝缘子在使用中（例如，在北美超过1.5亿瓷绝缘子），这对于公用事业公司来说是不实际的。改进绝缘子的设计，使其具有更长的使用寿命，多年来一直是人们感兴趣的话题。绝缘子的耐电压将通过增加机械、热和电气强度来提高。拟议研究项目的目的是与Powertech高压实验室合作，引入一种基于有限元法（FEM）和电气和机械测试标准化方法的高压绝缘子设计新方法。这项研究的结果将为绝缘子提供优化设计，提高其机械和电气耐受性。改进后的设计将提高Powertech Labs在高压绝缘子制造行业的竞争力和影响力。