摘要
在国际电工委员会(IEC)电磁兼容标准IEC6100-3-7以及国标GB12326-2000中,电压波动和闪变均被作为衡量电能质量的一项重要指标。本文首先按照IEC推荐的闪变仪的功能和设计规范,在MATLAB环境下建立了模拟式闪变仪的模型,并运用双线性变换法将其变换为数字式系统,给出了IEC数字式闪变仪的各环节数字滤波器的传递函数和运算结构;而后利用累积概率函数曲线(CPF)的单调递减特性,提出了快速计算短时间闪变值的方法。最后,按照IEC推荐标准和试验条件,借助MATLAB的仿真工具,对数字式系统进行了设计与仿真。通过实际测量表明该系统性能良好。
The voltage fluctuation and the flicker are taken as an important index to judge the power quality in IEC6100-3-7 of the EMC standard and GB12326-2000. It is firstly said that the analog model for the flicker meter is implemented under the environment of MATLAB according to the functions and design criterion suggested by IEC. Converting the analog model to a digital system by means of double-linearity transformation, the transfer functions and operating structure for the IEC digital flicker meter have been deduced in the first part. A method for fast calculating the short time flicker valuesis proposed by means of the montonic-decreasing characteristics of the cumulative probability function （CPF） curve. At last, a digital system is designed and simulated according to the IEC standard and with the MATLAB simulation tools, which shows that the system performance is excellent.
出处
《电测与仪表》
北大核心
2009年第4期50-52,62,共4页
Electrical Measurement & Instrumentation
