中国电力2025，Vol.58Issue(3)：108-118,11.DOI:10.11930/j.issn.1004-9649.202311125
基于磁路耦合的Sen变压器差动保护方案
Sen Transformer Differential Protection Scheme Based on Magnetic Circuit Coupling
摘要
Abstract
As a power flow control device,Sen transformer changes the amplitude and phase of voltage and current at both ends of the access line through gear adjustment to achieve power flow regulation.However,due to its complex and compact wiring form and internal structure,Sen transformers have more complex fault characteristics than ordinary power transformers,which brings difficulties to their ontology protection configuration.In order to solve this problem,this paper analyzes the topology of Sen transformer and establishes a differential protection scheme based on physical principles such as Kirchhoff's current law and electromagnetic induction law.The scheme installs TA at the input end,output end of Sen transformer and the end section of the winding of the excitation unit,and by configuring the Sen transformer with balance differential protection and magnetic balance differential protection,it can reflect the turn-to-turn fault and turn-to-turn fault of each winding of Sen transformer,as well as the short circuit fault of the leads between the windings,which effectively solves the problem of difficult protection configuration for Sen transformer body.Finally,the PSCAD/EMTDC simulation platform is used to verify the feasibility of the proposed scheme,which provides a theoretical support for the subsequent in-depth research and engineering application of Sen transformer.关键词
Sen变压器/磁平衡差动保护/电平衡差动保护Key words
Sen transformer/magnetic balance differential protection/electric balance differential protection引用本文复制引用
郑涛,于佳旭,眭程曦,申由,薛玉石,武剑..基于磁路耦合的Sen变压器差动保护方案[J].中国电力,2025,58(3):108-118,11.基金项目
国家自然科学基金联合基金资助项目(U2166205) （U2166205）
国网河北省电力有限公司科技项目(kj2022-074). This work is supported by Joint Funds of the National Natural Science Foundation of China(No.U2166205),Science and Technology Project of State Grid Hebei Electric Power Co.,Ltd.(No.kj2023-062). （kj2022-074）
