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首先建立了混合有源滤波器无源网络的内部电磁干扰模型,根据三相电流和磁感应压降之间的矢量关系,推导出无源网络等效电抗和等效电阻的数学表达式,以及品质因数和谐振带宽受电磁干扰影响的变化规律。具体分析了三相电抗器摆放位置和间距对上述性能参数的作用特点及强度.指出对称摆放三相电抗器是优化混合有源滤波器无源网络内部电磁兼容性的有效措施。实践验证了文中的电磁兼容性矢量分析方法和结论的有效性和实用性。
First, the internal electromagnetic interference model of the hybrid active power filter passive network is established. According to the vector relationship between the three-phase current and the magnetic voltage drop, the mathematical expressions of the equivalent reactance and equivalent resistance of the passive power network are deduced. Variation of Factors and Resonant Bandwidth Affected by Electromagnetic Interference. The characteristics and intensity of the three-phase reactor placement and spacing on the above performance parameters are analyzed in detail.It is pointed out that the symmetrical placement of three-phase reactor is an effective measure to optimize the electromagnetic compatibility of the passive network of hybrid active filter. The validity and practicability of the electromagnetic compatibility vector analysis method and conclusion in the paper are verified by practice.