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文章摘要
连接交流系统的HVDC线路暂态稳定判别及保护机制
Transient stability and protection scheme of HVDC link connected to AC systems
Received:April 24, 2019  Revised:April 24, 2019
DOI：10.19753/j.issn1001-1390.2020.16.022
中文关键词: 交直流混联系统  暂态稳定性  等面积定则  直流特高压
英文关键词: 
基金项目:国家电网有限公司科技项目：二次设备评价中心基础关键技术研究（201812032）；国网安徽省电力有限公司科技项目：±1100kV特高压直流换流阀故障暂态机理及保护测试技术研究（20192060）
Author NameAffiliationE-mail
gaobo* Electric Power Research Institute,State Grid Anhui Electric Power Company Limited, gpahdl@sina.com 
wangyu Electric Power Research Institute,State Grid Anhui Electric Power Company Limited, 29191808@qq.com 
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中文摘要:
      随着交/直流混联系统不断推广应用，混联系统的保护动作机制决定着系统的稳定性。本文提出了一种交直流混联系统稳定性判别原则，根据直流系统故障后的恢复运行极限时间配置保护。首先分析了交直流混联系统的暂态稳定性模型，推导出了HVDC连接下的电磁功率表达式。其次以两机交直流混联系统为例，分析了暂态稳定的AC/DC等面积定则，给出了故障前、故障中和故障后的分析。根据两机系统暂态稳定判据，提出了直流系统故障下的恢复运行的极限时间，以此配置保护，提高混联系统的暂态稳定性。最后通过仿真算例，分析了影响AC/DC系统暂态稳定性的主要参数，同时说明了本文所提方法的适用性。
英文摘要:
      
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