摘要
电气设备在电流电压的作用下,在其内部及其附近会产生多种物理场,如电磁场、温度场、流体场、应力场等,并对构成电气设备的电介质、磁介质及导体三类主要材料产生作用,如使绝缘材料因电、热、应力的作用逐渐劣化,使导磁材料饱和产生谐波,在电机类设备中使导体产生相对运动完成机电能量转换。这些物理场(电磁、温度、流体、应力、运动、绝缘)相互耦合、相互作用,构成复杂的多物理耦合场。文中首先简要回顾我国电气工程领域为计算电磁学的发展所做出的贡献;指出电磁多物理场分析贯穿于电气设备的材料研制、设计制造、运行维护的全寿命过程,是决定电气设备经济性、可靠性的"硬核";然后分别介绍电气设备电磁多物理场耦合及运动涡流场耦合数值计算中的若干关键技术;特别指出绝缘材料的放电电压计算/预测是电磁多物理场计算的重要组成部分,亟待加强;进一步结合电气设备智能运维的发展需求,介绍电气设备热点温升、材料参数等基于电磁多物理场分析的智能反演检测研究方面取得的最新成果;最后提出电气设备电磁多物理场自主分析软件平台的开发思路。
Under the effect of current and voltage, multiple physical fields will generate in and near electrical equipment, such as electromagnetic field, temperature field, fluid field, and stress field, etc. These fields will militate against the dielectric medium, the magnetic medium and the conductor, which are three main types of materials constituting the electrical equipment. For example, they will make an insulating material deteriorated gradually due to the effects of electricity, heat and stress, saturate the permeability magnetic material and lead to harmonic generation, and cause relative movements between conductors in motor equipment, thus to complete electromechanical energy conversion. These physical fields(electromagnetic, temperature, fluid, stress, motion and insulation) are coupled and interact with each other to construct complex multiphysical coupling fields. Firstly, this paper briefly reviews the contributions made by the field of electrical engineering in China to the development of computational electromagnetism, and points out that electromagnetic multiphysical field analysis plays a role through the whole life process of material development, design and manufacture, operation, and maintenance of electrical equipment. It is the "hard core" that determines the economy and reliability of electrical equipment. Then, several key technologies in coupled numerical calculation of electromagnetic multiphysical fields and moving eddy current field in electrical equipment are introduced respectively. This paper specially points out that the discharge voltage calculation or prediction of insulating materials is an important component of electromagnetic multiphysical field simulation and needs to be strengthened. Further, based on the development demands of intelligent operation and maintenance of electrical equipment, this paper introduces the latest achievements in applications of electromagnetic multiphysical field analysis for intelligent inversion detection of hot spot temperature rise and material parameters of electrical equipment. Finally, an idea is proposed to develop an independent software platform for electromagnetic multiphysical field analysis of electrical equipment.
作者
阮江军
张宇
张宇娇
王栋
舒胜文
邱志斌
RUAN Jiangjun;ZHANG Yu;ZHANG Yujiao;WANG Dong;SHU Shengwen;QIU Zhibin(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Electric Power Research Institute of State Grid Jiangxi Electric Power Company,Nanchang 330096,China;School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Electric Power Research Institute of State Grid Henan Electric Power Company,Zhengzhou 450052,China;College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Department of Energy and Electrical Engineering,Nanchang University,Nanchang 330031,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2020年第3期739-756,共18页
High Voltage Engineering
基金
国家重点基础研究发展计划(2011CB209404-3)
国家自然科学基金(50977066,51207081,51577106)
湖北省杰出青年基金(2019CFA085)
江西省自然科学基金(20192BAB216028).
关键词
电磁场
流体场
温度场
应力场
绝缘强度
electromagnetic field
fluid field
temperature field
stress field
dielectric strength
