摘要
针对电容式电压互感器的电力电压测量中,电容分压器驱动负荷能力小、大负载时测量不准确这一现状,文中提出了一种应用于电压互感器二次测的基于数字信号处理器(DSP)的数字化高精度信号放大系统。采用数字化逆变器来实现电力系统正弦电压信号功率的放大,利用DSP的高速处理能力,实现了逆变系统的高性能和高精度。并在其软件中采用了用于电流预估计的PI控制算法和电压电流的双环控制。实验结果表明,该数字化电力电压信号放大器精度高、性能良好。
The digital high precision signal power amplifier applied in the second winging of capacitive voltage transformer for the high AC voltage measurement in power system resolved the intrinsic problem and disadvantage of low load capability. This digital amplifier consists of a digital inverter that can amplify the sine voltage signal power using a digital signal processor（DSP）. With the high processing ability of DSP, the amplifier achieved high performance and high precision. The digital inverter applies the improved digital PI control arithmetic of the current prediction and the double control loops of voltage and current. The prototype amplifier has been developed and tested ,and the results show its high precision and good performance.
出处
《河南机电高等专科学校学报》
CAS
2007年第2期91-93,共3页
Journal of Henan Mechanical and Electrical Engineering College
基金
国家自然科学基金重点资助项目(50405030)
