绝缘材料的介质损耗角在线检测方法研究

Study on On-line Measurement Method of Dielectric Loss Angle for Insulation Materials

介质损耗因素在线检测中受到各方面因素的限定,包括系统频率波动、谐波及噪声干扰;传统的测量方法计算量大,且受环境干扰下无法保证测量的精度;通过对三角卷积窗和全相位数据处理性能进行分析,提出了一种双卷积窗全相位数据预处理的方法检测介质损耗角,同时改进相位角校正算法;该算法能够准确提取基波相位角,计算出介质损耗角;通过仿真与几种经典方法对比,该算法具有较高的检测精度,受上述因素影响较小。

The on-line detection of dielectric loss factors is limited by various factors,including system frequency fluctuation,harmonic and environmental noise interference.The traditional measurement method can not guarantee the accuracy of measurement because of the large amount of calculation and the disturbance.Based on the analysis of the performance of triangular convolution window and all phase data processing,a new method for detecting dielectric loss angle is proposed,and the phase angle correction algorithm is improved.The algorithm can accurately extract the fundamental phase angle and calculate the dielectric loss angle.Compared with several classical methods,the algorithm has higher detection accuracy and is less affected by the above factors.