摘要
首先分析了干式空心电抗器匝间短路故障模型,在此基础上提出一种基于功角变化的电抗器匝间绝缘故障在线监测方法,功角测量的精度是实现该方法的关键要素。通过比较快速傅里叶变换法、汉宁窗插值快速傅里叶变换法和汉宁窗插值改进基波相位分离法的误差,分析了频率波动和谐波干扰对功角测量的影响。此外,设计了一种由监测装置、干式空心电抗器智能电子设备(IED)和专家软件组成的电抗器匝间绝缘故障在线监测系统。实验结果表明,汉宁窗插值改进基波相位分离法优于快速傅里叶变换法和汉宁窗插值快速傅里叶变换法,且该监测系统可有效地检测出干式空心电抗器匝间短路故障。
The fault model of the inter-turn short circuit of the dry-type air-core reactor is firstly analyzed in this paper,by which an on-line monitoring method of the reactor inter-turn insulation fault based on the changed power angle is proposed.The accuracy of power angle measurement is vital for diagnosing the reactor inter-turn insulation fault.The influence of the frequency fluctuation and harmonic interference on measuring power angle is analyzed by comparing the errors of fast Fourier transformation(FFT),Hanning windowed interpolation FFT and fundamental harmonic separation algorithm improved by Hanning windowed interpolation.An on-line monitoring system of the reactor inter-turn insulation fault is also designed,which consists of the monitoring device,the intelligent electronic device(IED)of dry-type air-core reactor and the expert software.The experiment results show that the fundamental harmonic separation algorithm improved by Hanning windowed interpolation is superior to FFT and Hanning windowed interpolation FFT,and the inter-turn short circuit of the dry-type air-core reactor can be detected precisely by the on-line monitoring system.
作者
黄新波
周岩
朱永灿
曹雯
张龙
邬红霞
HUANG Xinbo;ZHOU Yan;ZHU Yongcan;CAO Wen;ZHANG Long;WU Hongxia(College of Electronics and Information,Xi'an Polytechnic University,Xi'an 710048,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2019年第2期150-155,181,共7页
Automation of Electric Power Systems
基金
陕西省重点科技创新团队计划资助项目(2014KCT-16)
陕西省重点研发计划资助项目(2018ZDXM-GY-040)
陕西省教育厅专项科研计划资助项目(17JK0322)~~
关键词
干式空心电抗器
功角
匝间短路故障
在线监测
基波相位分离法
dry-type air-core reactor
power angle
inter-turn short circuit fault
on-line monitoring
fundamental harmonic separation algorithm
