有功功率测量误差分析  

Analysis of Active Power Measurement Error

作　　者：吴舒萍[1] 黄兴平[2] 许建安[1] 

机构地区：[1]福建水利电力职业技术学院,福建永安366000 [2]厦门大学机电系,福建厦门361000

出　　处：《电气自动化》2014年第1期105-106,共2页Electrical Automation

摘　　要：用对称分量分析了三序功率与三相功率间的关系,得出三相功率是同一相序的电压与电流的对称分量函数;三相电路平衡时,用两瓦法能正确测量三相三线电路功率,当三相四线电路不平衡时,用两瓦法测量功率存在误差。Using symmetrical components, this paper analyzes the relationship between 3-sequence power and 3-phase power and concludes that 3-phase power is a function of the symmetrical components of voltages and currents of the same phase sequence. When the 3-phase circuit is in a balanced condition, we can correctly measure the power of the 3-phase 3-wire circuit in the 2-bush method. If the 3- phase 4-wire circuit is not balanced, there might be errors with the power measurement in the 2-bush method.

关 键 词：对称分量 有功功率 三相三线 三相四线 测量误差 

分 类 号：TM993[电气工程—电力电子与电力传动]