三相精密程控标准源的设计与实现  

Design and Implementation of Three-phase Precision Program-controlled Standard Source

作　　者：王伟红 金立 叶丽雅 王培宏 李少白 WANG Weihong;JIN Li;YE Liya;WANG Peihong;LI Shaobai(State Grid Zhejiang Training Center,Hangzhou 310015,China;State Grid Hangzhou Yuhang Power Supply Company,Hangzhou 311100,China)

机构地区：[1]国网浙江省电力有限公司培训中心,杭州310015 [2]国网浙江杭州市余杭区供电有限公司,杭州311100

出　　处：《浙江电力》2022年第4期36-43,共8页Zhejiang Electric Power

基　　金：国网浙江省电力有限公司科技项目(5211JP20008H)。

摘　　要：传统程控标准源无法满足OIML R46电能表国际建议对小电流、谐波输出精度等要求。因此,以提升标准源的稳态输出精度和动态响应速度为目的,在传统程控标准源的基础上,对DDS(直接数字波形合成器)信号生成、数模转换、功率放大、小电流处理、控制策略等作出改进,提出以定频滞环为核心的动态内环和以加窗快速傅里叶变换插值算法为基础的稳态外环相结合的双环控制策略。试验结果表明,所提方案能够有效提升标准源稳态输出精度和动态响应速度。The traditional program-controlled standard source cannot meet the requirements of the OIML R46 standard on small current and harmonic output accuracy.For the sake of improving the steady-state output accuracy and dynamic response speed of the standard source,DDS(direct digital synthesizer)signal generation,digital to analog conversion,power amplification,small current processing and control strategy are modified on the basis of the traditional program-controlled standard source.In particular,the dual loop control strategy based on the dynamic inner loop with constant frequency hysteresis loop its core and the steady-state outer loop based on the interpolating windowed FFT is used.The experiment results show that the proposed scheme can effectively improve the steady-state output accuracy and dynamic response speed of the standard source.

关 键 词：程控标准源 定频滞环 Rife-Vincent(I)窗 快速傅里叶变换 双环控制 

分 类 号：TM933.4[电气工程—电力电子与电力传动]