基于新型负载辨识的瞬时功率分析与计算

发布时间：2018-06-06 14:10

本文选题：负载辨识 + 功率理论　；参考：《电工技术学报》2014年S1期

【摘要】：基于坡印廷定理的瞬时功率的研究为功率理论方向的一个新近热点。此功率理论将坡印廷矢量从物理的电磁场领域应用到电路领域中,能精确地推导出电路中的瞬时功率,并将其分为瞬时有功功率和瞬时无功功率两个部分。但基于坡印廷定理的瞬时功率理论只适用于线性电路与负载突变的非线性电路,却不能鉴别负载渐变的电路。本文提出了将负载等效为电阻和电容并联的负载辨识新方法,此方法可以辨识负载渐变的非线性电路,并且根据负载辨识计算的瞬时功率定义符合实际能量流动。
[Abstract]:The research of instantaneous power based on Poynting theorem is a new hotspot in power theory. This power theory applies Poynting vector from the field of physical electromagnetic field to the field of circuit. The instantaneous power in the circuit can be deduced accurately and can be divided into two parts: instantaneous active power and instantaneous reactive power. However, the instantaneous power theory based on Poynting's theorem can only be applied to linear circuits and nonlinear circuits with sudden load changes, but it can not distinguish the circuits with gradual load changes. In this paper, a new method of load identification, which is equivalent to resistance and capacitance in parallel, is proposed. This method can identify the nonlinear circuit with gradual load change, and the instantaneous power definition of the load identification calculation is in line with the actual energy flow.
【作者单位】：华南理工大学电力学院;
【基金】：国家自然科学基金资助项目(50937001)
【分类号】：TM133

【相似文献】