摘要
为了满足在并网逆变器中对电压、电流信号高精度测量的要求,设计一种基于FPGA控制的高精度、多通道同步采样的ADS8556的数据采集系统。依据ADS8556的主要性能及特点编写了ADS8556在并行方式下的Verilog代码,并在ModelSim中仿真验证了代码的正确性。最后设计电压电流采样电路,通过Singnal TapⅡ可以观察得出实时采集的数据。实验表明该方案实现的电路测量精度高,采样速率高,完全满足在不平衡电网中对数据测量的要求。
In order to satisfy the accuracy requirements of voltage and electric current signal in grid-connected inverter,the paper develops a ADS8556 data collection system of multichannel,high-precision,synchronous-sampling based on FPGA.Meanwhile,this paper introduces the main feature of ADS8556,then writes the code with Verilog HDL language and simulated with ModelSim.At last,the voltage and current sample circuits are designed,and the collected data can be observed by Signal Tap.Experimental results show that this design has superior characteristics,such as high-accuracy measurement,tall sampling rate,and it meets the requirement of data measurements under unbalanced grid condition.
出处
《湖北工业大学学报》
2016年第5期39-42,共4页
Journal of Hubei University of Technology
