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J4  2011, Vol. 45 Issue (1): 178-184    DOI: 10.3785/j.issn.1008-973X.2011.01.031
    
Simulation on series harmonic resonance of microgrid
based on modal assessment method
LEI Zhi-li, AI Xin, CUI Ming-yong, LIU Xiao
School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China
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Abstract  

 Modal analysis based assessment method for series harmonic resonance in microgrid and corresponding indices and assessment sequences were proposed after analyzing the feature of microgrid in order to release and avoid the harmful effects of series harmonic resonance and enhance the accommodation of microgrid for equipment producing harmonic distortion. The network matrix eigenvalues of microgrid were calculated. Then harmonic resonance can be identified by the assessment indices derived from the numerical difference between eigenvalues of the matrix under various frequencies. Meanwhile, the effecting area of harmonic resonance was identified by the assessment indices derived by the element values of adjoint vectors of the eigenvalues. Therefore, the severer harmonic distortion can be avoided by changing harmonic emitting equipments locations according to the assessment results. Simulation results show that the  method is rational and effective.



Published: 03 March 2011
CLC:  TM 711  
Cite this article:

LEI Zhi-li, AI Xin, CUI Ming-yong, LIU Xiao. Simulation on series harmonic resonance of microgrid
based on modal assessment method. J4, 2011, 45(1): 178-184.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2011.01.031     OR     http://www.zjujournals.com/eng/Y2011/V45/I1/178


基于模态评估法的微网串联谐振仿真

为了防止和减轻微网中串联谐波谐振的危害,提高微网对谐波输出设备的兼容能力,从微网的特点出发,提出基于模态分析法的微网串联谐波谐振评估方法和相应的评估指标及评估步骤.计算微网网络方程中的特征根,根据特征根在不同频率下的数值结合评估指标判断微网中是否存在谐波谐振,同时根据特征根对应的伴随向量的元素数值结合评估指标确定微网中不同谐波谐振的影响范围,根据评估结果重新确定谐波输出设备的安装位置可以避免微网中出现严重谐波危害,仿真试验的结果证明本文提出的方法准确可靠.

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