农业科技与装备
農業科技與裝備
농업과기여장비
AGRICULTURAL SCIENCE & TECHNOLOGY AND EQUIPMENT
2013年
9期
38-39,42
,共3页
电能质量%Hilbert变换%电压波动与闪变%改进的Prony法
電能質量%Hilbert變換%電壓波動與閃變%改進的Prony法
전능질량%Hilbert변환%전압파동여섬변%개진적Prony법
power qualities%Hilbert transform%voltage fluctuation and flicker%improved Prony method
电压波动与闪变是当前电能质量问题的重要研究对象之一，对其进行有效监测，对于电能质量治理具有重要意义。提出一种基于Hilbert变换与改进的Prony法的参数估计法，该方法能准确提取出信号的包络线，检测出调制分量的幅值、频率等参数信息，采用统计排序法计算出短时闪变值Pst。 MATLAB仿真验证了该算法的有效性与精确性。
電壓波動與閃變是噹前電能質量問題的重要研究對象之一，對其進行有效鑑測，對于電能質量治理具有重要意義。提齣一種基于Hilbert變換與改進的Prony法的參數估計法，該方法能準確提取齣信號的包絡線，檢測齣調製分量的幅值、頻率等參數信息，採用統計排序法計算齣短時閃變值Pst。 MATLAB倣真驗證瞭該算法的有效性與精確性。
전압파동여섬변시당전전능질량문제적중요연구대상지일，대기진행유효감측，대우전능질량치리구유중요의의。제출일충기우Hilbert변환여개진적Prony법적삼수고계법，해방법능준학제취출신호적포락선，검측출조제분량적폭치、빈솔등삼수신식，채용통계배서법계산출단시섬변치Pst。 MATLAB방진험증료해산법적유효성여정학성。
Voltage fluctuation and flicker are currently important research subjects in power quality. Effective monitoring of the two fac-tors is of great significance to ensuring power quality. An evaluating method based on Hilbert transform and improved Prony method is proposed to evaluate the modulating wave. The method can precisely detect the range of the voltage fluctuation as well as the modulation amplitude,frequency and other parameters. The short term flicker value Pst are calculated by the statistical ranking method. The simula-tion data by MATLAB show the accuracy of the theory.
