Research On Electric Energy Measuring Device On The Condition Of Distorted Signals

With the rapid economic development, nonlinear loads in the power system increase, and the structure becomes more complex. Electrical signals in addition to the steady state fundamental and harmonic, but also showing a quasi-periodic, time-varying characteristics of non-steady-state complex, triggering a more complex power flow transformation, not only affect the safe and efficient operation of electrical network, and the existing electric energy measurement method and device design presented new challenges. Therefore, a serious distortion in the current network signal in the condition of electrical energy to achieve accurate and reasonable measure of the electric energy measurement device, has very important significance.Firstly, the article describes the research background, current situation, significance sense of the electric energy measurement and the device in the condition of distorted signals at home and abroad.Secondly, we established a grid of typical non-stationary mathematical model of the signal distortion, in-depth systematic analysis of the direction of the trend of distortion signal power, a power to achieve accurate and reasonable measure of the new method, and wavelet sub-band measurements Methods for signal distortion decomposition under the conditions of measurement of power, in theory, the distortion power to achieve accurate measurements. Finally, the typical distortion of the signal power of simulation experiments, simulation results are given to verify the new method of energy measurement accuracy.Then, this paper proposed a new method of energy measurement based on the theory of electricity metering devices hardware and software design. In the hardware design to DSP + ARM core dual-core architecture, completed the data acquisition module, DSP processing module and the ARM control module design. In software design, software designs of each module are given in the flow chart.Finally, analyze all the errors that may exist in the electric energy measurement device.