一种基于混沌振子的电力系统谐波检测新方法

A new detecting method for harmonics in power system using chaotic oscillator

为了解决现有电力系统谐波检测方法普遍存在的对频率相近的谐波、间谐波分辨力不足和抗噪声干扰能力弱的问题,首次引入适应步长型间歇混沌振子解决以上两个问题,并介绍了应用间歇混沌振子进行频率估计的方法。此外,还提出了一种基于相态跃变型混沌振子的正弦信号幅值和相位简化估计方法,用以估计电力谐波和间谐波的幅值、相位参数。最后用一组仿真信号的检测结果,验证了适应步长型间歇混沌振子检测电力系统谐波和间谐波的有效性以及本文提出的信号参数估计方法的准确性。

This paper introduces the adaptive step intermittent chaotic oscillator for the first time to solve the problems of low resolution of close frequency and interharmonics and weak anti-noise ability, and describes two means for estimating frequency. The method of using intermittent chaotic oscillator for frequency estimation is proposed. Besides a simplified method of sine signal amplitude and phase is put forward which is based on phase jump chaotic oscillator for estimating the amplitude and phase of harmonic and interharmonics. Finally, a simulation result of a analog signal is used for verifying the availability and accuracy of the detection and estimation method proposed.