CAJ | 학술논문

理想的电能质量信号呈现标准的正弦波形，具有周期性重复的特点。实际的信号虽然可能会出现各种电能质量现象。但是，在各个周期时间内的采样数据仍然具有很强的相似性。根据电能质量信号的这一特点，可以提出一种简单有效的数据压缩方法。首先提取某一个周期时间内的采样数据作为基准，然后将其他周期时间内的数据与该基准作减法处理，保存差值。对差值采取相应的阈值处理，将较小的数值置零，最终结合LZW编码方法实现数据压缩。文中详细地介绍了算法的实现过程和LZW编码的工作原理。利用Matlab平台模拟了几种不同的电能质量现象，进行算法仿真。经验证，该方法实现简单，处理速度快，并且可以取得较好的压缩效果。
이상적전능질량신호정현표준적정현파형，구유주기성중복적특점。실제적신호수연가능회출현각충전능질량현상。단시，재각개주기시간내적채양수거잉연구유흔강적상사성。근거전능질량신호적저일특점，가이제출일충간단유효적수거압축방법。수선제취모일개주기시간내적채양수거작위기준，연후장기타주기시간내적수거여해기준작감법처리，보존차치。대차치채취상응적역치처리，장교소적수치치령，최종결합LZW편마방법실현수거압축。문중상세지개소료산법적실현과정화LZW편마적공작원리。이용Matlab평태모의료궤충불동적전능질량현상，진행산법방진。경험증，해방법실현간단，처리속도쾌，병차가이취득교호적압축효과。
Ideal power quality signal takes the form of standard sine wave and are periodically repeated. Although the actual signal may contain distortions, the sampled data in each period still has strong similarities. Based on the feature, a single yet effective data compression method is presented. First, the sampled data in a period is selected as the basic signal. Then it is subtracted with the data in other periods, and the result is saved. The result value less than the threshold is then set to zero. Finally, the data compression algorithm with LZW encoding is presented. Different power quality signals are simulated with Matlab, and the simulation results show that the proposed method is effective and simple with good compression performance.