电测与仪表2017，Vol.54Issue(1)：51-54,66,5.
基于Fryze时域无功定义的无功电能的准确计量
Accurate measurement of reactive power based on Fryze′s reactive power theory in time-domain
李贺龙 1王雪敏 2赵进全 2王卓 2洪平 2皮李刚2
作者信息
- 1. 中国电力科学研究院,北京100192
- 2. 西安交通大学电气工程学院,西安710049
- 折叠
摘要
Abstract
In allusion to the lack of accuracy of reactive power measurement methods at present under the condition of non-sinusoidal and asymmetry , this paper puts forward a reactive power measurement theory which is applicable to three-phase three-line system under the condition of non-sinusoidal and asymmetry based on Fryze′s reactive power theory in time-domain .According to Fryze′s reactive power theory in time-domain , three-phase instantaneous current can be decomposed into active current component and reactive current component .Then, the value and direction of reactive power of each harmonic can be achieved by FFT analysis on three-phase instantaneous voltage and reactive current component so as to realize the accurate measurement of reactive power of three-phase three-line system under the condition of non-sinusoidal and asymmetry .In this method , the reactive power is divided into positive reactive power and negative reactive power to avoid the offset of inductive reactive power and capacitive reactive power under different harmonic frequency generated by the same harmonic source which is finally verified by Matlab simulation and provides theory basis for accurate measurement of reactive power under the condition of non -sinusoidal and asymmetry .关键词
无功电能计量/非正弦不平衡/Fryze时域无功定义/正向无功功率/反向无功功率Key words
reactive power measurement/non-sinusoidal and asymmetry/Fryze′s reactive power theory in time do-main/positive reactive power/negative reactive power分类
信息技术与安全科学引用本文复制引用
李贺龙,王雪敏,赵进全,王卓,洪平,皮李刚..基于Fryze时域无功定义的无功电能的准确计量[J].电测与仪表,2017,54(1):51-54,66,5.
