高电压技术2011，Vol.37Issue(4)：828-833,6.
基于随机子空间和最小二乘法的介质损耗角检测方法
Measurement Algorithm of Dielectric Loss Angle Based on SSI-LS
摘要
Abstract
Dielectric loss angle is the effective means to determine the status of the high voltage apparatus insulation. The key to detect dielectric loss angle is correct extraction of the fundamental wave of voltage and current signal. We introduced a novel method based on the stochastic subspace identification (SSI) and least square(LS) method. The method can accurately extract fundamental wave of voltage and current signal, and gets the phase of fundamental wave, then obtains the accurately dielectric loss angle. Simulation is validated in the variety of real values of dielectric loss angle, frequency fluxion, third-harmonics, direct bias, sampling frequency, sampling dot number and white noise , and is compared with harmonic analysis method. Simulation results show the feasibility and effectiveness of this method.关键词
介损角/随机子空间/最小二乘/谐波分析法/基波/白噪声Key words
dielectric loss angle/ stochastic subspace identification/ least square/ harmonic analysis method/ base wave/ white noise分类
信息技术与安全科学引用本文复制引用
李天云,袁明哲,蔡国伟,白波..基于随机子空间和最小二乘法的介质损耗角检测方法[J].高电压技术,2011,37(4):828-833,6.基金项目
国家自然科学基金(50777007). （50777007）
