数字化电力电压测量信号的功率放大系统  

Digital power amplifier system for power voltage measuring

作　　者：张方军[1] 徐振[1] 

机构地区：[1]浙江机电职业技术学院电气工程系,浙江杭州310053

出　　处：《电力自动化设备》2005年第8期70-73,共4页Electric Power Automation Equipment

摘　　要：基于电容式电压互感器的电力电压测量现状,对电容分压器驱动负荷能力小,要求二次侧开路或接入高阻抗负载时才能保证测量精度的问题作了分析。提出了应用于电压互感器二次侧的基于数字信号处理器(DSP)的高精度信号放大系统。电压测量放大系统由输入功率因数校正和逆变两部分双环控制系统组成。详细阐述了DSP在逆变系统中的应用、系统的采样和控制时序。基于DSP的电压测量功率放大器的样机已研制,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 application limitation of CVT(Capacitive Voltage Transformer) in voltage measuring is analyzed,which has low load capability and demands open secondary circuit or high impedance to achieve high precision.A high-precision signal amplifier system based on DSP(Digital Signal Processor) is presented for applying in the secondary side of voltage transformer.It consists of two dual - loop control systems:correction and inversion.The application of DSP in the inversion system is expounded in detail,as well as sampling and control sequence.The prototype amplifier has been developed and tested,and the results show its high precision and good performance.

关 键 词：数字信号处理器 功率放大器:数字化逆变器 

分 类 号：TM933.2[电气工程—电力电子与电力传动]