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Power System Harmonic Analysis under Nonstationary Situations and Its Application Based on Improved FFT Method
Pages: 256-262
Year: Issue:  11
Journal: Transactions of China Electrotechnical Society

Keyword:  谐波分析 非稳态 改进FFT 余弦偶次幂窗;
Abstract: 在分析余弦函数窗频谱特性的基础上,建立基于余弦偶次幂窗改进FFT的谐波分析方法。运用最小二乘拟合法推导建立信号基波与各次谐波的频率、幅值和相位计算修正公式。仿真结果表明:提出的方法能有效克服基波频率波动以及间谐波的影响,谐波参数计算准确度明显提高,适合于非稳态条件下的谐波分析。嵌入式系统应用验证了算法的正确性。
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