136 / 2019-01-25 13:47:31

Research on A New Active Power Measurement Algorithm

window function,filter,active power measurement,non-integer-period sampling,energy accumulation

全体主题 > Power and Energy Measurements

With the widely use of non-linear electrical equipment， the load signal in the smart grids exhibits distortion and dynamic characteristics. Simultaneously, non-integer-period sampling is inevitable in the power and energy estimation of the smart meter, which brings errors to the energy accumulation. In this paper, firstly, a new window is proposed based on the traditional filter power measurement algorithm and the frequency characteristics of the window are analyzed. Then, based on the window and structured model of smart meter, a new active power measurement algorithm is proposed. And then, in simulations, adopting different active power algorithms, the electric energy measurement errors are simulated and analyzed under non-integer-period sampling .These simulated waveforms include sinusoidal envelope and OOK envelope dynamic test signals based on fundamental wave and five kinds of distortion waveforms in IEC62052. Finally, the results show that the proposed filter can effectively improve the accuracy of active energy accumulation.