摘要
铁心中剩磁较多时会引起较大幅值的励磁涌流,导致换流变压器保护装置烧毁或误动作,严重影响其正常运行。为了消除剩磁对换流变压器的影响,本文从换流变压器感应线圈一侧的感应能量变化着手,提出了一种基于感应能量的换流变压器剩磁测量方法,其目的是在对换流变压器施加外部激励的基础上,以换流变压器感应线圈一侧产生的能量变化为计算基础,通过拟合感应能量与换流变压器铁心剩磁关系式对其铁心剩磁进行计算。研究所提出的方法执行简便,操作性强,对换流变压器的影响较小,能够为换流变压器剩磁的测量与消除提供理论依据。
When there is too much residual magnetism in the iron core,it can cause a large amplitude of excitation inrush current,leading to the burnout or misoperation of the converter protection device,and seriously affecting its normal operation.In order to eliminate the influence of residual magnetism on converter transformers,this paper proposes a residual magnetism measurement method for converter transformers based on the energy change on one side of the induction coil of the converter transformer,which is the induced energy.The purpose is to calculate the residual magnetism of the converter transformer core by fitting the relationship between the induced energy and the residual magnetism of the converter core based on the energy change generated on one side of the induction coil of the converter transformer,while applying external excitation to the converter transformer.The method proposed is easy to execute,has strong operability,and has little impact on the properties of the converter.It can provide reliable support for the measurement and elimination of residual magnetism in the converter.In addition,the experimental results also confirmed the time saving and economic benefits of this method.
作者
潘志城
张占龙
吕金壮
邓军
谢志成
李丁元
PAN Zhicheng;ZHANG Zhanlong;LYU Jinzhuang;DENG Jun;XIE Zhicheng;LI Dingyuan(Electric Power Research Institute of China Southern Power Grid Co.,Ltd.Ultra High Voltage Transmission Company,Guangzhou 510000,China;State Key Laboratory of Power Transmission Equipment Technology(Chongqing University),Chongqing 400044,China)
出处
《电工电能新技术》
CSCD
北大核心
2024年第10期52-61,共10页
Advanced Technology of Electrical Engineering and Energy
基金
中国南方电网有限责任公司科技项目(CGYKJXM20220310)。
关键词
感应能量
脉冲激励
剩磁测量
换流变压器
induced energy
pulse excitation
residual magnetism measurement
converter transformer
