摘要
谐波对感应式有功电度表计量的影响一直受到关注,但测量显示,现有的分析方法存在明显缺陷,不足以准确描述谐波引起的计量误差。谐波对感应式有功电度表计量的影响可分解为谐波功率和谐波电流影响的叠加,该文主要分析谐波功率引起的计量误差。该文首先简要说明现有的分析方法所存在的问题,为了突破这些局限,该文将误差模型的推导建立在磁路分析的基础上,因为这更接近感应式有功电度表的工作原理。与现有的分析方法相比,该方法能够反映线路磁阻随频率的变化以及区分电压、电流元件中的工作磁通和非工作磁通,并且指出谐波功角偏移现象是因电压、电流元件中各部件磁阻的变化而产生,而不是只取决于电流元件中相位调整线圈参数的变化。实验分析显示该模型较好的吻合实际测量结果。
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.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第4期138-143,共6页
Proceedings of the CSEE
关键词
谐波功率
感应式有功电度表
计量
计量误差
磁路
Induction Watthour meter
Harmonic powers
Registration error
Magnetic circuit
