【摘要】 运用对称分量法原理对经过Furrier变换后的三相不对称,非正弦电压和三相线性不平衡负载电流进行分解,并与其他功率理论方法如电流物理份量法和瞬时无功功率理论对系统的功率现象和定义进行分析和比较。通过比较可见在频域上,对于线性负载系统,应用对称分量法对所有三相四线电压不对称,负载不平衡的线性系统的分解与定义较其他的功率方法更合理。对于三相三线电压不对称,负载为非线性不平衡系统可以先按有功功率潮流方向将系统分拆为2个线性子系统再应用对称分量法分解即可得到最多的电量参数。同时也证明了对该类系统的补偿存在一些难以解决的问题。更多还原

【Abstract】 The 3-phase non-sinusoidal asymmetrical source voltage and 3-line unbalanced load current that were transformed in Furrier transformation would be analyzed with symmetrical component method in the paper,and then compared with current physical components theory and instantaneous reactive power theory.It is reasonable that the symmetrical component method is best among the theories on the 3-phase 4-line power system.For the asymmetrical source voltage and non-linear load current power system,it cut the system into two linear sub-systems according to it’s direction of active power flow and decomposed the voltage and current with symmetrical component method to obtaine more detailed electrical data.However there are some problems of compensating reactive power in the 3-phase asymmetrical voltage 3-line non-linear unbalanced load power system.更多还原