Transient magnetic circuit method is adopted to calculate the power loss in winding and shading coil. Based on the analysis of heat transfer process in AC contactor, a thermal model is proposed and the temperature fie...Transient magnetic circuit method is adopted to calculate the power loss in winding and shading coil. Based on the analysis of heat transfer process in AC contactor, a thermal model is proposed and the temperature field distribution is simulated with 3-D FEM of ANSYS. Comparison of simulation results with measurements shows that the proposed method is effective.展开更多
面对新能源大规模开发和用能负荷再电气化导致的源荷强不确定性影响,以及电力系统庞大存量资产挖潜增效的重大需求,交流输配电系统柔性化发展趋势愈加凸显。该文提出了柔性交流输配电技术(flexible AC transmission&distribution te...面对新能源大规模开发和用能负荷再电气化导致的源荷强不确定性影响,以及电力系统庞大存量资产挖潜增效的重大需求,交流输配电系统柔性化发展趋势愈加凸显。该文提出了柔性交流输配电技术(flexible AC transmission&distribution technology,FTDT)基本概念和内涵,介绍了电力电子装置主导和电磁型设备为基础的2类柔性技术谱系和装置基本功能。FTDT拓展了传统柔性交流输电系统(flexible AC transmission systems,FACTS)的内涵,将应用范围拓展至配电系统,新增了电磁型设备柔性化技术的内容。FTDT将为新型电力系统的构建和安全高效运行提供系统性解决方案与装备支撑。展开更多
文摘Transient magnetic circuit method is adopted to calculate the power loss in winding and shading coil. Based on the analysis of heat transfer process in AC contactor, a thermal model is proposed and the temperature field distribution is simulated with 3-D FEM of ANSYS. Comparison of simulation results with measurements shows that the proposed method is effective.
文摘面对新能源大规模开发和用能负荷再电气化导致的源荷强不确定性影响,以及电力系统庞大存量资产挖潜增效的重大需求,交流输配电系统柔性化发展趋势愈加凸显。该文提出了柔性交流输配电技术(flexible AC transmission&distribution technology,FTDT)基本概念和内涵,介绍了电力电子装置主导和电磁型设备为基础的2类柔性技术谱系和装置基本功能。FTDT拓展了传统柔性交流输电系统(flexible AC transmission systems,FACTS)的内涵,将应用范围拓展至配电系统,新增了电磁型设备柔性化技术的内容。FTDT将为新型电力系统的构建和安全高效运行提供系统性解决方案与装备支撑。
