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为了避免滤波装置的无源部分与电网发生的谐振对滤波器所造成的危害,在考虑谐振的情况下,提出采用谐振检测原理对滤波装置进行了优化配置。通过对配电网节点导纳矩阵特征值的分析,根据阻抗频谱曲线检测谐振出现的位置以及谐振次数,以电网各母线的谐波电压总畸变率为目标函数,得出了滤波器的最优安装位置及滤波器无源支路参数的设计,使滤波器的配置避免谐振的发生。Matlab仿真和实例结果表明,通过谐振检测方法对滤波器进行优化配置能取得良好的滤波效果,避免了谐振的发生,方法切实可行。
In order to avoid the harm caused to the filter caused by the resonance of the passive part of the filter device and the power grid, the filter device is optimally configured by using the principle of resonance detection when considering the resonance. Based on the analysis of the characteristic values of admittance matrix of distribution network node, the position of resonance and the number of resonance are detected according to the impedance spectrum curve. Taking the total distortion of harmonic voltage of each bus as objective function, the optimal filter The design of the installation location and the passive pass filter parameters of the filter makes the configuration of the filter avoid the occurrence of resonance. The results of Matlab simulation and examples show that the optimal filter configuration can achieve good filtering effect through resonance detection method and avoid the occurrence of resonance, and the method is feasible.