文章摘要
翁汉琍,王胜,林湘宁,等.基于波形相似度的抗TA饱和变压器相位差动保护判据[J].电力系统自动化. DOI: 10.7500/AEPS20180412004.
WENG Hanli,WANG Sheng,LIN Xiangning, et al.A Waveform Similarity based Criterion of the Transformer Phase Differential Protection Unaffected by Current Transformer Saturation[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180412004.
基于波形相似度的抗TA饱和变压器相位差动保护判据
A Waveform Similarity based Criterion of the Transformer Phase Differential Protection Unaffected by Current Transformer Saturation
DOI:10.7500/AEPS20180412004
关键词: 变压器  相位差动保护  抗TA饱和  波形相似度  Hausdorff距离算法
KeyWords: transformer  phase differential protection  immune to current transformer saturation  waveform similarity  Hausdorff distance algorithm
上网日期:2019-01-10
基金项目:国家自然科学基金
作者单位E-mail
翁汉琍 梯级水电站运行与控制湖北省重点实验室(三峡大学) honey_weng@163.com 
王胜 梯级水电站运行与控制湖北省重点实验室(三峡大学) 745232821@qq.com 
林湘宁 强电磁工程与新技术国家重点实验室(华中科技大学) xiangning.lin@hust.edu.cn 
陈乐 强电磁工程与新技术国家重点实验室(华中科技大学) chenle_999@foxmail.com 
黄景光 梯级水电站运行与控制湖北省重点实验室(三峡大学) hjg8008@sina.com 
李振兴 梯级水电站运行与控制湖北省重点实验室(三峡大学) lzx2007001@163.com 
摘要:
      针对变压器差动保护中电流互感器(TA)饱和导致保护可靠性与速动性降低的问题,利用波形相似度对变压器区内、区外故障,尤其是TA饱和时两侧电流相位信息进行提取,结合Hausdorff距离算法在波形相似度识别的优势,提出一种基于波形相似度的抗TA饱和变压器差动保护判据,以识别包含TA饱和在内的各种故障情况。通过仿真与动模试验表明,该判据在识别变压器区内、外故障,尤其是TA饱和时均能做出正确判断。且对于噪声干扰的情况仅需做简单处理即可有效识别。
Abstract:
      In order to solve the decreases of the reliability and rapidity of protections caused by current transformer saturation in transformer differential protection, the phase information of the currents on both sides of transformer under conditions of internal and external faults, especially accompanied with current transformer saturation, can be extracted by the waveform similarity algorithm. Combining with the superiorities of the Hausdorff distance algorithm, a waveform similarity based criterion of the transformer phase differential protection, which is immune to the saturation of current transformers, was put forward to identify various fault conditions. The proposed criterion was validated by means of simulation and dynamic analog experiment tests. In addition, for the case of noise interference, the faults can be effectively identified by virtue of simple processing.
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