摘要
电子式互感器以微电子技术和计算机技术为基础 ,所处的工作环境电磁干扰严重 ,易受到外界干扰而影响测量精度 ,并且有些误差是互感器本身结构引起的 ,硬件措施难以消除。提出了用小波变换的软件方法对互感器误差进行校正 ,着重分析了小波变换在信号去噪和以电容分压器作传感元件的电子式电压互感器带俘获电荷重合闸误差校正中的应用 。
Electronic current transducers(ECT)and electronic voltage transformers(EVT)are novel current and voltage measurement apparatus,yet they are susceptible to the environment disturbance which limit their applications This paper presents a software method based on wavelet analysis to calibrate the measurement error of ECT and EVT The bi orthogonal Wavelet transformation(WT)is used which possesses capabilities of fast calculation and line phase Simulation results of signal re noise and error calibration caused by trapped charges of EVT show its feasibility and efficiency
出处
《电工技术学报》
EI
CSCD
北大核心
2002年第6期92-96,共5页
Transactions of China Electrotechnical Society
