摘要
气体绝缘金属封闭输电线路(GIL)已广泛应用在极端环境和紧凑条件下的电力输送,GIL绝缘可靠性关系到系统运行安全稳定,是其规模化应用的基础和关键。特高压苏–通穿江输电采用GIL管廊输电方式,其距离长、电压高,绝缘结构典型,材料特性复杂,运行工况特殊,研发之初无可以借鉴的经验。针对特高压苏–通GIL综合管廊工程,研究掌握了GIL绝缘子用环氧复合材料电、热、力性能及其随温度的变化规律,结合固化动力学–热–力耦合仿真分析了材料工艺流程,开发了释缓界面应力、屏蔽界面缺陷的半导电界面材料,提出了材料关键性能控制指标;基于多物理场耦合仿真与复杂曲面优化设计方法,优化设计了特高压GIL盆式绝缘子结构,发明了哑铃型三支柱绝缘子,提出了苏–通GIL综合管廊基础单元绝缘子和载流结构配置方案;总结详述了GIL真型绝缘子的放电特性。通过研究解决了特高压交流GIL输电中的关键绝缘问题,掌握了特高压交流GIL的核心技术,为先进GIL输电装备自主研发提供了重要依据,为保障华东特高压交流环网可靠运行提供了有力技术支撑。
Gas insulated metal enclosed transmission line(GIL)has been widely used in power transmission under extreme environment and compact conditions.The reliability of the GIL insulation is related to the safety and stability of power system,which is the basis and the key of large-scale application.UHVAC GIL was applied for the Soochow-Nantong(for short:Sutong)river-spanning transmission,possessing the characteristics of long distance,high voltage,typical insulation structure,complex material and special operating conditions.There is no experience to learn from at the beginning of the research and development.Aiming at the UHV Su-Tong GIL project,we analyzed the electrical,thermal and mechanical properties of the epoxy composite used for GIL insulator,as well as their change law with temperature.The technological process was studied in combination with the curing dynamics-thermal-mechanical coupling simulation.A semi-conductive interface material for relieving interface stress and shielding interface defects is developed,and the key performance control index of the material is proposed.Based on the multi-physical-field coupling simulation and the complex surface optimization design method,the basin insulator and tri-post insulator used in UHV GIL are optimized and designed.Besides,the configuration scheme of insulator and current carrying structure of foundation unit of GIL are also developed.And the discharge characteristics of GIL insulators are summarized in detail.Through the researches,the key insulation problems have been solved and the core technology of UHVAC GIL has been mastered,which provides an important basis for the independent manufacture and application of advanced GIL transmission equipment.A strong technical support also has been provided for the reliable operation of UHVAC loop network in East China.
作者
彭宗仁
张鹏飞
刘鹏
韩先才
杨保利
崔博源
吴泽华
田汇冬
王浩然
PENG Zongren;ZHANG Pengfei;LIU Peng;HAN Xiancai;YANG Baoli;CUI Boyuan;WU Zehua;TIAN Huidong;WANG Haoran(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;China Electric Power Research Institute,Beijing 100192,China;State Grid Corporation of China,Beijing 100031,China;Pinggao Group Co.,Ltd.,Pingdingshan 467001,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2023年第10期4046-4057,共12页
High Voltage Engineering
基金
国家电网公司总部科技项目(5500-202199528A-0-5-ZN)。
关键词
特高压
气体绝缘金属封闭输电线路
材料特性
结构设计
放电特性
ultra high voltage
gas-insulated metal-enclosed transmission line
material characteristics
structure design
discharge characteristics
