【摘要】 混合式有载分接开关的切换时序设计对其运行损耗、器件寿命与动作可靠性具有显著影响。本文以非对称星型混合式有载分接开关为研究对象，分析了该分接开关的工作状态与动作过程，构建分接开关切换过程数值仿真模型，进一步研究了非对称拓扑结构与初始相位差对正向与反向切换时序过程中损耗的影响。结果表明反向切换产生的过渡损耗小于正向切换。通过分析机械开关与半导体组件的动作误差及误差对切换过程的影响，合理设置切换动作缓冲区，提升切换可靠性。为了缩短切换过程持续时间、减小过渡电阻损耗，通过建立开关动作容限模型，对动作容错范围进行归一化整合处理，去除冗余开关裕量，对混合式有载分接开关的动作时序进行整体优化，提出具有高容错能力且切换时间更短的动作时序。上述研究对提升混合式有载分接开关动作可靠性与快速切换能力、减小电路损耗提供理论指导。更多还原

【Abstract】 The switching timing design of hybrid on load tap changer(OLTC) has a significant impact on its operating loss, device life, and operational reliability. Taking a hybrid OLTC with asymmetric-star topology as the research object, this paper analyzes the working state and action process of the tap changer, constructs a numerical simulation model for the tap changer switching process, and further studies the impact of asymmetric topology and initial phase difference on the loss during forward and reverse switching timing. The results show that the transition loss generated by reverse switching is smaller than that of forward switching. By analyzing the action errors of mechanical switches and semiconductor components and their impact on the switching process, the switching action buffer is reasonably set to improve switching reliability. In order to shorten the duration of the switching process and reduce the loss of transition resistance, this paper establishes a switch action tolerance model, normalizes and integrates the fault tolerance range of the action, removes redundant switch margins, and optimizes the overall action sequence of the hybrid OLTC, proposing an action sequence with high error tolerance and shorter switching time. These above results can provide theoretical guidance for improving the operational reliability and fast switching ability of hybrid OLTC, and reducing circuit losses.更多还原