Development of flickermeter system based on IEC standard
HE Jian-min · Dianli zidonghua shebei · 2003
The measuring principle of IEC flicker is presented and the inf lu ence of filter parame-ters on system is analyzed.The corresponding IIR digital filter is derived with bilinear transforma-tion from the filter proposed by IE C and the practical digital method is given.The statistic calcu-lation of shor t time flicker value has been studied and the measures for decreasing the error are presented.According to the functions and design criteria of flickermeter b rought forward by IEC,a flickermeter system has been designed.Its software is based on LabWindows/CVI virtual instrument development platform.The syste m performance indexes well satisfies IEC design criteria.