曹虹;王兴国;周泽昕;柳焕章;杜丁香;蔡文瑞;

• 1:电网安全与节能国家重点实验室(中国电力科学研究院有限公司)
• 2:国家电网有限公司华中分部
• 3:华北电力大学电气与电子工程学院

摘要(Abstract)：

串联变压器是统一潮流控制器(UPFC)系统的重要组成元件。由于其特殊的结构及接入系统方式,串联变压器网侧绕组纵向电压随UPFC控制方式变化而变化。同一短路匝比匝间短路时,串联变压器差动电流与网侧绕组纵向电压幅值呈正相关,传统电流差动保护作为串联变压器匝间短路的保护灵敏性和可靠性不足。提出了一种新型的串联变压器匝间保护原理,构建了与网侧绕组纵向电压幅值呈正向线性关系的自适应动作门槛,以及根据两侧电流幅值自动调整的制动量,极大地提高了保护的灵敏性和可靠性,在实际工程中具有良好的应用前景。RTDS仿真结果验证了传统保护的不足及新型保护的优越性能。

关键词(KeyWords)： 统一潮流控制器;串联变压器;匝间短路;网侧绕组纵向电压

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司科技项目：弱电磁耦合元件轻微故障识别及定位技术研究(SGSDZZ00FZJS1800841)~~

作者(Author): 曹虹;王兴国;周泽昕;柳焕章;杜丁香;蔡文瑞;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.0763

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