电网中非线性负载的日益增加给电能计量特别是谐波电能的计量和谐波分析提出了新的要求.本文采用单片IDT三相计量芯片90E36,实现了宽量程计量和谐波分析功能,90E36特有的DFT计算引擎消除了传统设计中采用的模数转换器A/D和DSP.试验结果表明,谐波电压和电流的分析数据符合IEC标准和国家标准的要求.%The increasing of non-linear load in grid requires new demands for metering, especially for energy metering in harmonic conditions as well as the harmonic data analysis of voltage and current. A new design presented in this paper to achieve wide span measuring, energy metering and data analysis in harmonic condition using a single metering chip 90E36 from IDT company. This design eliminates ADC component and DSP in a traditional design by the DFT engine in 90E36. Test results show harmonic components data of voltage and current complied with both IEC and China National Standards.
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