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文章摘要
一种介质损耗因数在线监测新方法
A Novel Method for Online Monitoring of Dielectric Loss Factor
Received:August 06, 2014  Revised:August 06, 2014
DOI:
中文关键词: 高准确度  改进方法  在线监测  介质损耗因数
英文关键词: High-accuracy  modified method  online monitoring  dielectric loss factor
基金项目:山东省高校科技计划项目(J12LN93)
Author NameAffiliationE-mail
SONG Tao* College of Electronic and Electrical Engineering ZiBo Vocational institute,Zibo,Shandong st222999@126.com 
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中文摘要:
      应用传统方法对介质损耗因数进行在线测量存在许多内在的性能局限,包括同步采样、间谐波和电力系统频率必须保持不变等问题。在频率波动和间谐波都存在的非稳态信号环境下,采用传统方法不能保证测量的准确性。本文提出一种对电力设备介质损耗因数进行在线测量的高准确度改进方法。新提出的包括数据截断和数据叠加的数据处理方法,能够补偿数据频谱泄漏所引起的相位偏移,它能够准确地提取基波信号并计算介质损耗因数。数据仿真和实际工程测量结果表明,新方法不受以上所提局限的影响,具有良好的应用可行性。
英文摘要:
      There are many inherent performance limitations using traditional algorithms for online measurement of dielectric loss factor including synchronous sampling, no inter-harmonics and the power system frequency must be invariable. In a non-stationary signal environment where power frequency fluctuation and inter-harmonic components exist, there is no guarantee of measurement accuracy when using traditional methods. The paper proposes a high-accuracy advanced method for online monitoring of dielectric loss factor of power equipment. The theoretical basis of the advanced algorithm is based on a new data processing procedure including data truncation and data addition which compensates phase distortion as a result of the fact that the spectrum of addition data contains offsets. The algorithm can accurately extract the fundamental signal and calculate the dielectric loss factor. Measured results from simulations and practical engineering projects show that the new algorithm has good application feasibility without being affected by the limitations rendered above.
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