四川电力技术
四川電力技術
사천전력기술
SICHUAN ELECTRIC POWER TECHNOLOGY
2015年
4期
66-69
,共4页
电压闪变%矩阵束算法%低秩近似%谐波
電壓閃變%矩陣束算法%低秩近似%諧波
전압섬변%구진속산법%저질근사%해파
voltage flicker%matrix pencil algorithm%low-rank approximation%harmonics
随着电力系统冲击性负荷的增加，电网中存在的电压波动与电压闪变越趋严重。基于矩阵束算法提出了一种电压闪变参数检测新方法。该方法利用电压闪变信号模型的特殊性质，把它转换为矩阵间的特定关系，从而将难于处理的非线性求解问题简单化，不仅可以准确地提取闪变电压调幅波的频率和幅值，还可以获取相位信息。算法中引入矩阵低秩近似方法使得在求解广义特征值的时候，能更好地抑制噪声干扰，同时减少了计算量。分别对噪声背景下简单闪变和复杂闪变进行仿真分析，结果表明，该方法具有精度好、运算率高、抗噪性强等特点。
隨著電力繫統遲擊性負荷的增加，電網中存在的電壓波動與電壓閃變越趨嚴重。基于矩陣束算法提齣瞭一種電壓閃變參數檢測新方法。該方法利用電壓閃變信號模型的特殊性質，把它轉換為矩陣間的特定關繫，從而將難于處理的非線性求解問題簡單化，不僅可以準確地提取閃變電壓調幅波的頻率和幅值，還可以穫取相位信息。算法中引入矩陣低秩近似方法使得在求解廣義特徵值的時候，能更好地抑製譟聲榦擾，同時減少瞭計算量。分彆對譟聲揹景下簡單閃變和複雜閃變進行倣真分析，結果錶明，該方法具有精度好、運算率高、抗譟性彊等特點。
수착전력계통충격성부하적증가，전망중존재적전압파동여전압섬변월추엄중。기우구진속산법제출료일충전압섬변삼수검측신방법。해방법이용전압섬변신호모형적특수성질，파타전환위구진간적특정관계，종이장난우처리적비선성구해문제간단화，불부가이준학지제취섬변전압조폭파적빈솔화폭치，환가이획취상위신식。산법중인입구진저질근사방법사득재구해엄의특정치적시후，능경호지억제조성간우，동시감소료계산량。분별대조성배경하간단섬변화복잡섬변진행방진분석，결과표명，해방법구유정도호、운산솔고、항조성강등특점。
Voltage fluctuation and voltage flicker have become a serious problem with the rapid increase of impulse load in pow -er system.Based on matrix pencil algorithm , a new method to identify voltage flicker parameters is proposed .This method u-ses the special property of voltage flicker signal model and converts it to the special relationship between matrixes .As a result, the nonlinear question which is difficult to be processed will be simplified .This method not only can accurately extract the fre-quency and amplitude of flicker voltage wave , but also can get accurate information of phase .And the noise effect is restrained because of the low-rank approximation method when the generalized eigenvalue is to be solved .At the same time, the calcu-lated amount is reduced .The simple flicker and complex flicker which are under the back ground of noise are analyzed respec -tively and the simulation results show that the proposed method has high precision , fast operation efficiency and strong anti -nose capacity .
