摘要
针对传统的电能质量参数采集系统处理速度慢、精度低等问题,设计了基于定点DSP芯片ADSP-BF548和高精度模数转换芯片AD7656的电能质量参数高速采集系统。系统采用锁相倍频技术实现同步采样,DSP通过增强型并行外围接口(EPPI)以DMA的方式对AD7656的转换数据进行16位高速并行采集。同时运用DSP芯片通用定时器的"捕捉"工作模式,实现对电网频率的测量。测试表明,该系统精度高,数据处理速度快,具有很高的实时性。
To solve the problem that the traditional power quality parameter acquisition system＇ s slow processing speed, low precision,this paper designed a high-speed power quality parameter acquisition system based on fixed-point DSP chip ADSP - BF548 and high-precision A/D conversion chip AD7656. The system used the phase-lock frequency multiplication technology to achieve synchronous sampling, and the data converted by AD7656 was collected by the DSP through EPPI in the DMA mode. The actual grid frequency achieves high-precision measurement by the use of DSP＇ s general-purpose timer working in capture mode. Tests show that the system has high precision, hihg data processing speed and good real-time capability.
出处
《仪表技术与传感器》
CSCD
北大核心
2011年第10期49-51,共3页
Instrument Technique and Sensor
关键词
电能质量
锁相倍频
数据采集
DSP
AD7656
power quality
phase-lock frequency multiplication
data acquisition
DSP
AD7656
