谐波分析法用于介损在线监测实测数据的相关问题分析

发布时间：2018-10-22 16:51

【摘要】：大量针对谐波分析法用于介损测量的研究工作都是基于数字信号试验完成的,而针对实际容性设备(试品)进行实测数据研究则可以验证数字信号试验结果的正确性,同时考察算法应用于实测数据时需要注意的问题,因此具有非常重要的实际意义和应用参考价值。研究工作对实际容性试品的电流、电压数据进行测量分析,采用无线电磁发射作为白噪声干扰信号源,电打火火花放电作为脉冲干扰信号源进行了干扰条件下数据的测量分析。研究结果表明:在谐波分析算法应用于实际容性设备的介损测量时,由于存在采样回路间的固有相差和无法保证电压、电流信号采样的完全同时性,会产生理论值和计算值之间的较大误差,应在算法中加入校正环节。验证了较强干扰对谐波分析法应用于介损因数在线监测的准确度有较大影响,而基于"3δ"准则的剔点算法和线性滑动平滑算法具有较好消噪效果的数字信号分析结论。
[Abstract]:A large number of research work on harmonic analysis used in dielectric loss measurement is based on digital signal test, but the accuracy of digital signal test results can be verified by the actual capacitive equipment (test sample). At the same time, it is necessary to pay attention to the application of the algorithm to the measured data, so it has very important practical significance and application reference value. The current and voltage data of practical capacitive samples are measured and analyzed. Wireless electromagnetic emission is used as white noise interference signal source and spark discharge is used as pulse interference signal source to measure and analyze the data under interference condition. The results show that when the harmonic analysis algorithm is applied to the dielectric loss measurement of practical capacitive equipment, because of the inherent difference between the sampling loops and the inability to guarantee the voltage, the current signal sampling is completely simultaneous. The error between the theoretical value and the calculated value will be large, so the correction link should be added to the algorithm. It is verified that strong interference has great influence on the accuracy of harmonic analysis applied to on-line monitoring of dielectric loss factor, and the conclusion of digital signal analysis based on "3 未" criterion and linear sliding smoothing algorithm has better denoising effect.
【作者单位】：郑州电力高等专科学校;河南电力调度中心;
【分类号】：TM934.3

【共引文献】