王祥,袁建香,黄金娟,冷学道,沈爱群.一款基于18位ADC的高精度三相标准表的设计[J].电测与仪表,2016,53(18):. WANG Xiang,YUAN Jian-xiang,Huang Jin-juan,LENG Xue-dao,SHEN Ai-qun.Design of High–Precision 3-Phase Reference power meter Based on 18 Bits ADC[J].Electrical Measurement & Instrumentation,2016,53(18):.
一款基于18位ADC的高精度三相标准表的设计
Design of High–Precision 3-Phase Reference power meter Based on 18 Bits ADC
In view of the situation that high-precision 3-phase standard electric energy meter is short in our country, while the price of imported high-precision meter is relatively high, a kind of high-precision standard electric energy meter based on 18 bits of ADC is designed. In addition, the linearity and stability of current sampling become better via the active compensation technique of current transformer; the noise jamming is little and signal is stable via power isolation technique; low-temperature offset inlet foil resistance is adopted for signal sampling, and long-term stability is good; sampling is carried out for 1024 bits every cycle wave, and point-by-point processing method is applied for electric quantity calculation, thus, fast data updating, good real-time, and high measuring accuracy can be obtained. Combining advanced techniques of various aspects and high-quality devices, as per experiment, the accuracy class of this type of 3-phase reference meter for electric energy can reach as high as within 0.01 class ;
