基于alpha-beta平面合成曲线特性的对称三相电路谐波分析
发布时间：2019-02-22 12:09
【摘要】：随着非线性负荷的广泛应用,电网中的谐波问题日益严重,实现对谐波的准确测量与分析意义重大。为降低对称三相电路的谐波分析复杂度,提出了基于谐波信号的alpha-beta平面合成曲线周期特性的谐波成分分析方法。该方法首先对单相电量做alpha-beta变换并求取合成曲线的模长及其周期,其次依据合成曲线周期分析电路中可能存在的谐波成分,最后结合谐波信号的总谐波畸变率等信息计算所存在谐波的谐波含有率。分析表明,当合成曲线模长的周期小于四分之一工频周期时,其计算量约为傅里叶分析方法的三分之二。通过对算例的运算验证了所提方法的有效性。
[Abstract]:With the wide application of nonlinear load, the harmonic problem is becoming more and more serious, so it is very important to measure and analyze harmonics accurately. In order to reduce the complexity of harmonic analysis in symmetric three-phase circuits, a harmonic component analysis method based on the periodic characteristic of alpha-beta plane synthesis curve based on harmonic signal is proposed. In this method, first of all, the single phase electric quantity is transformed by alpha-beta and the module length and its period of the synthesis curve are obtained. Secondly, the harmonic components in the circuit are analyzed according to the cycle of the synthesis curve. Finally, the harmonic content rate of harmonics is calculated by combining the total harmonic distortion rate of harmonic signal and other information. The analysis shows that when the period of the module length of the synthetic curve is less than 1/4 power frequency period, the calculation amount is about 2/3 of that of the Fourier analysis method. The effectiveness of the proposed method is verified by an example.
【作者单位】： 武汉理工大学华夏学院;中国电力科学研究院;国网江西省电力科学研究院;
【分类号】：TM711
本文编号：2428213
[Abstract]:With the wide application of nonlinear load, the harmonic problem is becoming more and more serious, so it is very important to measure and analyze harmonics accurately. In order to reduce the complexity of harmonic analysis in symmetric three-phase circuits, a harmonic component analysis method based on the periodic characteristic of alpha-beta plane synthesis curve based on harmonic signal is proposed. In this method, first of all, the single phase electric quantity is transformed by alpha-beta and the module length and its period of the synthesis curve are obtained. Secondly, the harmonic components in the circuit are analyzed according to the cycle of the synthesis curve. Finally, the harmonic content rate of harmonics is calculated by combining the total harmonic distortion rate of harmonic signal and other information. The analysis shows that when the period of the module length of the synthetic curve is less than 1/4 power frequency period, the calculation amount is about 2/3 of that of the Fourier analysis method. The effectiveness of the proposed method is verified by an example.
【作者单位】： 武汉理工大学华夏学院;中国电力科学研究院;国网江西省电力科学研究院;
【分类号】：TM711
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本文编号：2428213
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