正弦电路瞬时功率理论研究  

STUDY ON THEORY OF INSTANTANEOUS POWER OF SINUSOIDAL CIRCUIT

作　　者：熊元新[1] 陈允平[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2001年第6期18-20,36,共4页Power System Technology

基　　金：国家自然科学基金资助项目 (5 99770 16 )

摘　　要：针对研究近一个世纪还没有解决的瞬时无功功率界定与定义的问题 ,该文认为应从原始瞬时有功功率、瞬时无功功率界定来研究瞬时功率理论。首先分析了现有功率定义中存在的缺陷 ,系统地给出了正弦稳态电路瞬时有功电流、无功电流 ,瞬时有功功率、无功功率 ,视在功率、平均有功功率 ,平均无功功率和平均视在功率的定义。The definition of instantaneous reactive power in sinusoidal circuit is still a pending problem and should be studied further. The authors consider that the theory of instantaneous power should be studied on the basis of the original definitions of instantaneous active and reactive power. In this paper some defect of the currently used definition of power is analyzed firstly. Then the definitions of the instantaneous active and reactive current, the instantaneous active and reactive power, the instantaneous apparent power, the average active and reactive power and the average apparent power of sinusoidal circuit in steady state are systematically given out. Those definitions are used in the analysis of operation characteristics of sinusoidal symmetrical three phase circuit.

关 键 词：正弦电路 瞬时功率 平均功率 无功功率补偿 电网 

分 类 号：TM714.3[电气工程—电力系统及自动化]