多直流馈入受端电网交直流相互影响分析框架

  [目的]  现有交直流相互影响相关研究主要采用理论分析或数字仿真等方法就某些方面开展研究，缺乏从全局角度进行全面系统性总结分析，不利于全面分析与整体把握交直流相互影响基本过程与关键环节。  [方法]  在梳理总结大量成果基础上，建立了多直流馈入受端电网交直流相互影响问题总体分析框架；分析了直流换相失败发生、发展、恢复和直流闭锁全过程及相关环节典型参数，研究了交直流相互影响内涵及交直流相互影响途径，总结了常用分析方法及工程实用判据。  [结果]  提炼了交直流相互影响基本过程与核心问题，首次以图示方式提出了多直流馈入受端电网交直流相互影响问题分析总体思路与全景框架。  [结论]  为相关人士进一步深入研究交直流相互影响问题提供了参考借鉴。

AC/DC Interaction Analysis Framework for Load Center Power Grids with Multiple HVDC Infeeds

  [Introduction]  Researches already done on AC/DC interactions in power grid mainly focuses on certain aspects by means of theoretical analysis or digital simulation. With systematic analysis absent, it is not conducive to get a comprehensive understanding of interactions between AC and DC systems.  [Method]  Based on a large number of studies, this paper established a analysis framework for load center power grids with multiple HVDC infeeds. Firstly, occurrence, development, recovery of HVDC commutation failures and blocking were analyzed, and typical parameters were given. Then meanings and mechanisms of AC/DC interactions were studied,commonly used analysis methods and criteria used in practice were summarized.  [Result]  The essence of AC/DC interactions are defined. AC/DC interaction analysis framework for load center grids with multiple HVDC infeeds is proposed schematically for the first time.  [Conclusion]  This paper provides useful reference for further study on AC/DC interaction related problems.