Abstract：Based on the electric energy measurement theory, the formula deduction of the electrical energy measurement under linear and non-linear load in the system which exist harmonics, and pointed out the irrationality of the existing electric energy metering. Then, the SimPowerSyetems module of Matlab was used to verify the accuracy of electronic energy measurement; based on this simulation method, the system exist non-linear load was simulated, the simulation results shows that when the power system contains harmonic, actual consumption of electrical energy for linear user is lower than the measurement of energy measuring electricity, and the actual electricity power consumption of non-linear users is higher than the measurement of electrical energy measurement, so more reasonable method for electric energy metering is needed in further study. Based on the partial least squares regression model, a assessment method about non-linear level was propose, which increase the measuring accuracy of energy measurement under non-linear load.
[1] 冯力鸿. 谐波对电能表计量误差影响的分析[D]. 北京: 华北电力大学, 2008. [2] 赵文春, 马伟民, 胡安. 电机测试中谐波分析的高精度FFT算法[J]. 中国电机工程学报, 2001, 21(12): 83-87. [3] 胡振华, 王海滨, 张健毅. 工业电力系统谐波分析的高精度FFT算法[J]. 电力系统及其自动化学报, 2009(3): 4 6-52. [4] 许仪勋. 谐波对电能计量的影响与对策[D]. 上海: 上海交通大学, 2008. [5] Subjak J S Jr, Mcquilkin J S. Harmonics-causes, effects, measurements, and analysis: an update[J]. Industry Applications, IEEE Transactions on, 1990, 26(6): 1034-1042. [6] Barros J, Diego R I. Analysis of harmonics in power systems using the wavelet-packet transform[J]. Instrumentation and Measurement, IEEE Transactions on, 2008, 57(1): 63-69. [7] 周村和. 关于电容式电压互感器测量谐波电压的问题[J]. 电网技术, 2006(2): 43-46. [8] Girgis A A, Chang W B, Makram E B. A digital recursive measurement scheme for online tracking of power system harmonics[J]. IEEE Transactions on Power Delivery, 1991, 6(3): 1153-1160. [9] 赵勇, 沈红. 谐波源的识别及其与非谐波源的分离方法[J]. 电机工程学报, 2002, 22(5): 84-87. [10] 黄舜, 徐永海. 基于偏最小二乘回归的系统谐波阻抗与谐波发射水平 i 的评估方法[J]. 电机工程学报, 2007, 27(1): 93-97.
2014, Vol. 15 
