基于复值独立分量分析的配电网谐波状态估计

发布时间：2018-02-07 09:43

本文关键词： 谐波状态估计复值独立分量分析谐波电流幅值谐波电流相位相量比例系数　出处：《电网技术》2014年11期 　论文类型：期刊论文

【摘要】：针对独立分量分析算法在谐波阻抗未知条件下无法准确估计谐波电流幅值的问题,提出基于复值独立分量分析法的相量比例系数计算方法,来估计谐波电流的幅值和相位。首先采用复值独立分量分析法估计谐波电流相量初始值;然后考虑到系统侧等效阻抗远小于负荷侧等效阻抗,忽略线性负荷对谐波电流的分流作用,推导出2种不同情况下相量比例系数的计算方法;最终确定谐波电流幅值和相位。利用IEEE 14节点配电网系统和某地区局域电网对该方法进行验证,并与现有独立分量分析法对比,结果表明该方法能在谐波阻抗未知条件下准确地估计出谐波电流幅值和相位。
[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.
【作者单位】：四川大学电气信息学院;
【分类号】：TM73

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