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随着大量非线性负荷接入电网，电力系统谐波和间谐波污染日趋严重，严重影响了电网安全和电能质量。为提高谐波治理的有效性，保证电网的安全、稳定、可靠运行，提出一种基于三线性分解的电力系统谐波和间谐波参数估计算法。对含有谐波和间谐波分量的电力系统频率信号进行分析，可以利用欧拉公式将其转化为空域信号。在接收端利用多时延输出构造具有三线性特征的信号模型，利用复平行因子分析算法完成三线性拟合。仿真结果表明该算法不仅能辨识固定频率，而且能跟踪动态频率，同时还可以实现幅度和相位的精确估计，是一种超分辨率谐波和间谐波参数估计随着大量非线性负荷接入电网，电力系统谐波和间谐波污染日趋严重，严重影响了电网安全和电能质量。为提高谐波治理的有效性，保证电网的安全、稳定、可靠运行，提出一种基于三线性分解的电力系统谐波和间谐波参数估计算法。对含有谐波和间谐波分量的电力系统频率信号进行分析，可以利用欧拉公式将其转化为空域信号。在接收端利用多时延输出构造具有三线性特征的信号模型，利用复平行因子分析算法完成三线性拟合。仿真结果表明该算法不仅能辨识固定频率，而且能跟踪动态频率，同时还可以实现幅度和相位的精确估计，是一种超分辨率谐波和间谐波参数估计算法。“,”With a large number of nonlinear loads integration into the electric power grid, pollution of harmonic and inter-harmonic have become more and more serious. In order to improve the effectiveness of harmonic elimination and ensure the security, reliability and stability of electric power system, an algorithm of harmonic and inter-harmonic parameter estimation based on tri-linear decomposition was proposed. The frequency signal with harmonic and inter-harmonic can be analyzed by transforming the signal to spatial signal with the use of Euler formula. A tri-linear characterized signal model was constructed by using multiple delay output of the receiver. Complex parallel factor (COMFAC) algorithm was used to complete tri-linear fitting. The simulation results reveal that this algorithm not only can recognize the fixed frequency, but also can track the dynamic one. At the same time, it can realize estimation of amplitude and phase. And it is a super resolution algorithm of harmonic and inter-harmonic parameter estimation.