三相电网信号的双重Kalman滤波测量方法

发布时间：2018-03-19 22:41

本文选题：三相电网信号　切入点：谐波分析　出处：《电力系统自动化》2017年16期 　论文类型：期刊论文

【摘要】：提出一种基于Kalman滤波器的三相电网信号的谐波分析方法。该算法针对正负序分量的幅值相位和基波的频率,分别建立一个Kalman滤波器,并在两个滤波器之间形成联系。前者的状态变量可以用来计算基波瞬时频率并作为后者的测量;后者的状态变量可以提供前者模型参数。给出了两个滤波器的初始化过程与检测信号突变的方法,从而加快算法的响应速度。仿真验证了三相电网信号的幅值、相位和频率发生突变,幅值和频率同时连续变化,以及处于三相不平衡条件下,双重Kalman滤波测量方法依然准确高效。实验对非理想电网的三相电压、电流信号进行谐波分析,根据分析结果重构的信号误差平均值分别仅为0.67%和1.04%。
[Abstract]:This paper proposed an analysis method for three-phase harmonic signal based on Kalman filter. This algorithm for positive and negative sequence components and harmonic amplitude and phase frequency, respectively, the establishment of a Kalman filter, and contact formation between the two state variable filter. The former can be used to calculate the instantaneous frequency and the latter as a fundamental measurement; state variables the latter can provide the parameters of the model. The former gives a method of initialization process and the detection signal of the two filter mutations, thus speeding up the response speed of the algorithm is verified by simulation. The amplitude of the three-phase power grid signal, phase and frequency of mutations, while the amplitude and frequency of continuous change, and in the unbalanced condition, double Kalman filter measurement method is accurate and efficient. The experiment of non ideal grid voltage, the harmonic analysis of the current signal, according to the results of reconstruction of the letter The mean value of the number error is only 0.67% and 1.04%., respectively.

【作者单位】：浙江大学电气工程学院;
【基金】：浙江省重点研发计划资助项目(2017C01039) 国家自然科学基金资助项目(51377142)~~
【分类号】：TM711;TM935

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