【摘要】 研究了基于虚拟仪器的数字闪变仪的设计和实现中的关键技术,提出基于FFT分析法的闪变测量方案和具体实现方式,分析采样参数选择、有效值测量算法、电网频率变化及电网谐波等因素对测量结果的影响,提出相应提高测量精度的对策。设计方法已应用于实际测量仪器的研制。更多还原

【Abstract】 Voltage fluctuation and flicker are two important indices for power quality assessment.With study of the key technology to design digital flicker meter based on virtual instrument,a digital calculation method based on FFT and its concrete realization way are presented.The effects of different sampling parameters,harmonics,and system frequency shifting are investigated and ways to improve measurement accuracy are given.The method discussed has been put into practice. This project is supported by Hunan Province R & D Program(No.20030301).更多还原