摘要
系统采用FPGA控制模数转换器,将模拟量转化为数字量,由单片机完成数据处理、实现电力参数的交流采样,通过液晶显示器显示频率、相位差、电压和电流的实时值,在过压20%、欠压20%时进行报警,并能定时打印电压,电流、频率及相位差值。实践证明,采用该交流采样方法进行数据采集,通过运算获得的电压、电流有功功率,功率因数等电力参数有很好的精确度和稳定性。
The system adopts FPGA to control the D/A converter, transforms analog quantity to digital quantity, it adopts SCM to finish data processing and realize the alternating current sampling of electric parameters, displays frequency, phase difference and real time value of voltage and current through LCD, alarm will be activated if the voltage is 20% above or below normal level, and the system could print the voltage, current, frequency and phase difference regularly. It has proved that the electric parameters such as the active power of voltage and current, power factors and so on obtained through operation are very accurate and stable, by adapting the A.C. sampling method in data acquisition.
出处
《电测与仪表》
北大核心
2006年第11期16-18,31,共4页
Electrical Measurement & Instrumentation
基金
黑龙江省科技厅攻关资助项目(GC02A118)
