【摘要】 以电工理论为基础,分析了非正弦交流电路中,因存在谐波电流而导致产生的畸变功率N,使电路中的视在功率S、有功功率P、无功功率Q不再符合直角三角形的关系,出现了S>（1/2）^P2+Q2的现象。利用S,P,Q 和N构成功率四边形,由S,P和Q计算非正弦交流电路的基波功率因数cos （?）1、总功率因数λ、总位移因数cos （?）、畸变功率N、畸变角（?）N和畸变因数ξ等物理量,对ξ等物理量的表达式做了分析。并用现场实测数据和文中公式对相关物理量进行了实例计算。更多还原

【Abstract】 Based on the electric theory,this paper studies the nonsinusoidal a-c circuit,points out that harmonics current can lead to producing distortion power N ,so that apparent power 5,active power P and reactive power Q no longer match the relation of right-angle triangle,existing S> （1/2）^P2+Q2 ,and the S,P, Q constitute the power quadrangle with the N. If S,P and Q are known,using the power quadrangle can compute the fundamental harmonic power factor cos （?）1 ,the total power factor λ,the total displacement factor cos （?）,the distortion power N,the distortion angle （?）N and the distortion factor ξ ,which are analyzed,and relevant physical quantities are calculated and based on experimental data and the formulae presented.更多还原