基于混合卷积窗三谱线插值的介损角测量方法  

Dielectric Loss Angle Measurement Method Based on Mixed Convolution Window with Three Spectral Lines Interpolation

作　　者：张强[1] 王海云[1] 王维庆[1] 萨妮耶·麦合木提 ZHANG Qiang;WANG Haiyun;WANG Weiqing;SANIYE·Maihemuti(Engineering Research Center for Renewable Energy Power Generation&Grid Technology Approved by Education Ministry for Its Establishment Under College of Electrical Engineering,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院可再生能源发电与并网技术教育部工程研究中心,乌鲁木齐830047

出　　处：《电力电容器与无功补偿》2020年第6期125-131,共7页Power Capacitor & Reactive Power Compensation

基　　金：新疆维吾尔自治区高校科研计划自然科学项目(XJEDU2017I002);新疆维吾尔自治区重点研发计划项目(2016B02019);新疆维吾尔自治区“天山雪松”人才培养计划项目(2017XS02);教育部创新团队项目(IRT-16R63)。

摘　　要：快速傅里叶变换在非同步采样下进行介损角测量时,将无法避免地产生频谱泄露和栅栏效应,严重影响了介损角测量时的准确性。文中提出一种基于Hanning与Nuttall混合卷积窗的三谱线插值介损角测量算法,将所提算法与加经典窗算法进行对比分析可知,该混合卷积窗算法具有更快的旁瓣衰减速率和较窄的主瓣宽度,能有效克服因非同步采样造成的介损角测量误差。通过频率变化、谐波含量波动、白噪声影响、采样点变动下的介损角测量仿真实验,进一步验证了文中所提算法的准确性和可靠性。Dielectric loss angle measurement under non⁃synchronization sampling by the use of fast Fourier transform method will inevitably produce spectrum leakage and picket fence effect and will seriously influence the accuracy of dielectric loss angle measurement.In this paper,a kind of dielectric loss angle measurement method based on Hanning and Nuttall mixed convolution window with three spectral lines interpolation is proposed.It is known by comparison and analysis of the proposed algorithm with the classical windows algorithm that the mixed convolution window has faster side lobe attenuation rate and narrow main lobe width and can effectively overcome the dielectric loss angle measurement error caused by non⁃synchronization sampling.The accuracy and reliability of the proposed algorithm are verified further by simulation experiments of dielectric loss angle measurement under frequency variation,harmonic content fluctuation,white noise influence and sampling point variation.

关 键 词：介损角 HANNING窗 Nuttall窗 混合卷积窗 三谱线插值 快速傅里叶变换 

分 类 号：TM51[电气工程—电器]