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《Proceedings of the Csee》 2002-04
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INFLUENCE OF HARMONIC POWERS ON METERING ERROR OF INDUCTION WATTHOUR MERER

DENG Zhi1, XU Bai-yu1, MEI Gui-hua1, CHEN Qing-qian2, ZHANG Zhong-dong2 ( 1.GuangDong Power Test and Research Institute, Guangzhou 510600, China; Head Company of GuangDong Power Groups, Guangzhou 510600 ,China )  
Affection of harmonic distortion on the registration error of induction Watthour meter is noticed for a long time. But measurement result show that the current analysis method can not accurately describe the registration error of induction Watthour meter caused by harmonic distortion because of obvious defect. The registration error is mainly due to harmonic power and harmonic current. This paper mainly analyzes the error caused by harmonic power. This paper first briefly explains the defect of current method. In order to remedy the defect, the analysis method described in this paper is on the basis of magnetic circuit analysis because of more closing to the principle of induction Watthour meter. In contrast to current analysis method, this method can shows the variation of magnetic resistance with frequency, distinguish the working flux and non-working flux in voltage section or current section. This method also points out that the deviation of harmonic power angle is due to magnetic resistance variation of components in voltage section and current section, not merely the result of parameter variation of phase adjusting coil in current section. Experiment analysis show that error models which is the outcome of this method is in accordance with measurement results.
【CateGory Index】: TM933.4
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