【摘要】 指出了韩国学者Hyosung Kim提出的p-q-r法在电力系统谐波检测中的局限性,详细讨论了在电压有畸变的情况下用p-q-r法检测三相谐波电流的问题。从p-q-r法的基本理论出发,通过理论分析证明了在电压有畸变的情况下,p-q-r法不能准确地检测出系统的谐波电流。仿真实验表明,当电压畸变较小时,采用p-q-r法进行电流谐波检测,其误差可以忽略,当电压畸变较大时,检测误差较大,不能忽略。更多还原

【Abstract】 The limitation of the p-q-r method, which is put forward by Korean research fellow Mr. Hyosung Kim and applied to power system harmonic detection, is pointed out. The problem that the detecting the harmonics in three phases by p-q-r method under the voltage distortion is researched in detail. Starting from the basic theory of p-q-r method given by Mr. Hyosung Kim and by means of the theoretical analysis, it is proved that when the voltage is distorted, the harmonic currents cannot be accurately detected by p-q-r method. The results of simulation show that when voltage distortion is not serious, the error of the detection can be neglected; when voltage distortion is more serious, the detection error will increase and should not be neglected.更多还原