多功能信号源系统设计与数据压缩方法研究  

Design of Multifunction Signal Source System and Research on Data Compression Methods

作　　者：李达 张俊[2,3] 秦明辉[4] 吴仲城 任亭亭 刘雪澄[2,3] LI Da;ZHANG Jun;QIN Minghui;WU Zhongcheng;REN Tingting;LIU Xuecheng(Institute of Physical Science and Information Technology,Anhui University;High Magnetic Field Laboratory,Chinese Academy of Sciences;High Magnetic Field Laboratory of Anhui Province;CSG Smart Electrical Technology Co.Ltd)

机构地区：[1]安徽大学物质科学与信息技术研究院 [2]中国科学院强磁场科学中心 [3]强磁场安徽省实验室 [4]科大智能电气技术有限公司

出　　处：《仪表技术与传感器》2024年第7期51-58,93,共9页Instrument Technique and Sensor

基　　金：合肥综合性国家科学中心资助项目(QGCYY04)。

摘　　要：在智能电网的各种设备安全检测中,需要信号源模拟多种故障信号,重复配置大量试验参数。针对这一需求,设计了一个多功能及操作便捷的信号源系统。该信号源系统能够输出多路可调直流、交流信号,还可配置开入量、开出量信号进行状态序列试验,模拟多种运行故障;利用SQLite存取试验数据,可快速进行多种电气试验,提升检测效率;使用混合熵编码与提升格式的小波变换等算法对录波文件(COMTRADE格式)进行压缩,节省存储空间,较对比算法有更高的压缩比和更低的重构误差。经测试,系统能够实现用户自定义的信号调制,模拟电力系统多种故障信号,在工程现场应用取得了良好的效果。In various security assessments for devices within the smart grid,it is necessary to simulate a variety of fault signals and repeatedly configure numerous test parameters.To address this requirement,a versatile and user-friendly signal source system was designed.This signal source system can not only output multiple adjustable DC and AC signals,but also introduce digital input and output signals to create state sequence tests,thereby simulating various power grid operational faults.Utilizing SQLite for storing and accessing test data enabled rapid execution of various electrical tests,enhancing detection efficiency.By using mixed entropy encoding and lifting-based wavelet transform,recording files were compressed in COMTRADE format.This compression technique not only saved storage space,but also exhibited higher compression ratios and lower reconstruction errors compared to alternative algorithms.Through testing,the system can realize user-defined signal modulation and simulate various fault signals,achieving excellent results when applied in engineering field application.

关 键 词：状态序列 COMTRADE SQLITE 模拟信号源 熵编码 提升格式 小波变换 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]