| 采用3类特征参量比值法的铁磁谐振过电压识别 |
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| 引用本文： | 杜林,李欣,吴高林,邓帮飞.采用3类特征参量比值法的铁磁谐振过电压识别[J].高电压技术,2011,37(9). |
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| 作者姓名： | 杜林 李欣 吴高林 邓帮飞 |
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| 作者单位： | 1. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400030
2. 重庆市电力公司电力科学研究院,重庆,401123 |
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| 基金项目： | 国家创新研究群体基金(51021005); 重庆市科技攻关计划(CSTC2010AC3051)~~ |
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| 摘 要： | 电力系统铁磁谐振过电压时常发生,持续时间长,严重危及电气设备及电网的安全运行。铁磁谐振过电压特征提取及类型识别,有助于有针对性的采取快速抑制过电压的措施,对保障电网安全可靠稳定运行具有重要的现实意义。为此,在变电站实测过电压波形基础上,根据铁磁谐振过电压发生机理及波形特征,将小波变换良好的时频局部化特性和傅里叶变换良好的频域分析能力有机结合,提取了能够有效反映铁磁谐振过电压的3类特征参量,并提出利用这3类比值识别铁磁谐振过电压的方法。该方法理论基础比较直观,识别流程清晰简单,大量现场实测数据验证了该方法在识别铁磁谐振过电压时的有效性和可靠性。
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| 关 键 词： | 过电压在线监测系统 小波变换 傅里叶变换 铁磁谐振 特征提取 谐波次数 比值法 过电压识别 |
Ferro-resonance Overvoltage Identification Using Three Feature Parameters of Ratio Method |
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| DU Lin,LI Xin,WU Gao-lin,DENG Bang-fei.Ferro-resonance Overvoltage Identification Using Three Feature Parameters of Ratio Method[J].High Voltage Engineering,2011,37(9). |
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| Authors: | DU Lin LI Xin WU Gao-lin DENG Bang-fei |
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| Affiliation: | DU Lin1,LI Xin1,WU Gao-lin2,DENG Bang-fei2(1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400030,China,2.Chongqing Electric Power Research Institute,Chongqing 401123,China) |
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| Abstract: | The feature extraction and recognition of ferro-resonance overvoltage is helpful for taking targeted measures to restrain overvoltage quickly,and it is of great significance to guarantee electric power system running in reliable,safe and steady status.Based on the occurring mechanism and waveform features of ferro-resonance overvoltage monitored in the substation,the wavelet transform is effectively combined with the Fourier transform so as to extract three characteristic parameters reflecting on ferro-reso... |
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| Keywords: | overvoltage on-line monitoring system wavelet transform Fourier transform ferro-resonance feature extraction harmonic number ratio method overvoltage identification |
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