基于DSP与CPLD的CVT低校高现场测试仪的设计  

Design of testing instrument for high field DSP and CPLD based on CVT low school

作　　者：海志华[1] 魏华[1] 钱辉敏[1] 

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074

出　　处：《自动化与仪器仪表》2015年第2期19-22,共4页Automation & Instrumentation

摘　　要：随着电力系统中输电容量的不断扩大,CVT在中、高压电网中应用日渐广泛。传统的测量大多采用串联或并联谐振升压的方法,其测试接线复杂、搬运困难的缺点日益突出。本文提出了一种基于DSP和CPLD的CVT低校高现场测试仪,分析了装置的整体设计原理及功能,概述了程控放大电路、D/A转换及人机交互的设计。装置采用仿真负荷技术,通过内置多变比的自升压电压标准和感分来测量相应变比的CVT,测试速度快且易于携带,可节省大量的人力物力,满足国家互感器检定规程,保证了关口电能计量的准确性,在电力系统的应用中具有推广作用。With the transmission capacity of the power system is expanding constantly, CVT is used more and more widely in the middle, high voltage grid, The traditional measuring method is generally used in series or parallel resonant boost,but the test of complicated wiring, handling difficult shortcomings increasingly prominent. This paper presents a design of CVT field testing instrument based on DSP and CPLD, analyses the design principle and function of the whole device, summarizes the design of programmable amplifier circuit, D/A conversion and human-computer interaction. The device saves a lot of manpower and material resources, meets the national transformer test procedures, and ensures the accuracy of measurement in gateway energy.

关 键 词：CVT现场测试仪 数字信号处理器 可编程逻辑器件 低校高 电能计量 

分 类 号：TP332.1[自动化与计算机技术—计算机系统结构]