本文關鍵詞： 諧波狀態(tài)估計 復值獨立分量分析 諧波電流幅值 諧波電流相位 相量比例系數(shù)　出處：《電網(wǎng)技術》2014年11期 　論文類型：期刊論文

【摘要】：針對獨立分量分析算法在諧波阻抗未知條件下無法準確估計諧波電流幅值的問題,提出基于復值獨立分量分析法的相量比例系數(shù)計算方法,來估計諧波電流的幅值和相位。首先采用復值獨立分量分析法估計諧波電流相量初始值;然后考慮到系統(tǒng)側(cè)等效阻抗遠小于負荷側(cè)等效阻抗,忽略線性負荷對諧波電流的分流作用,推導出2種不同情況下相量比例系數(shù)的計算方法;最終確定諧波電流幅值和相位。利用IEEE 14節(jié)點配電網(wǎng)系統(tǒng)和某地區(qū)局域電網(wǎng)對該方法進行驗證,并與現(xiàn)有獨立分量分析法對比,結(jié)果表明該方法能在諧波阻抗未知條件下準確地估計出諧波電流幅值和相位。
[Abstract]:Aiming at the problem that the amplitude of harmonic current can not be estimated accurately by the independent component analysis (ICA) algorithm under the condition of unknown harmonic impedance, a phasor proportional coefficient calculation method based on complex independent component analysis (ICA) is proposed. To estimate the amplitude and phase of harmonic current, we first estimate the initial harmonic current phasor by using complex independent component analysis, and then consider that the equivalent impedance on the system side is much smaller than the equivalent impedance on the load side. Ignoring the shunt effect of linear load on harmonic current, the calculation method of phasor proportional coefficient in two different cases is deduced. Finally, the amplitude and phase of harmonic current are determined. The method is verified by IEEE 14-bus distribution network system and local area network, and compared with the existing independent component analysis method. The results show that this method can accurately estimate the amplitude and phase of harmonic current under the condition of unknown harmonic impedance.
【作者單位】： 四川大學電氣信息學院;
【分類號】：TM73

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本文編號：1494081