Modeling And Generation Technology Of Symmetric Run Compressed Sensing Test Signal

With the integration of renewable energy distributed power sources and the wide application of high-power dynamic loads such as electric arc furnaces and high-speed railway trains,smart grids show different dynamic characteristics from traditional power grids:rapid random fluctuations and distributed dynamic load currents Large-range volatility of output power of the power supply.This rapid random fluctuation dynamic characteristic has led to a significant increase in the errors of smart meters used for energy measurement.Under the development of the energy Internet,how to effectively detect the errors of smart meters under dynamic conditions in the power grid has become an urgent problem to be solved.First of all,this article explains that under the background of the Internet of Energy,the increase in distributed power sources and high-power loads has led to the out-of-tolerance phenomenon of smart energy meters,and summarizes the current research status of domestic and foreign test signals,especially excitation signals used for smart meter testing.Introduced the development of theoretical research and hardware design based on Compressed Sensing(CS)at home and abroad.Secondly,the principles of dynamic test signal modeling based on run-length mode are given;the existing deterministic dynamic power test signals and random dynamic power test signals and their run-length characteristics are studied.A symmetric run characteristic CS dynamic test excitation signal model is proposed,which extends the run length range of the dynamic test signal,and improves the efficiency of pseudo-random signal testing the error of the electric energy meter.Compared with the proposed CS test signal,the progressive Gaussian distribution characteristic is improved;The symmetrical run CS test signal can be compared and analyzed with the OOK(On-Off Keying)dynamic test signal to verify the validity of the test signal.Then,the electric energy meter test device for generating test excitation signal and error calculation was designed and developed,and the hardware circuit design and software program development of the device control board were completed.Based on the FPGA chip,OOK was generated to determine the test excitation signal and the symmetric run CS dynamic test.The control sequence of the excitation signal and the measurement uncertainty evaluation of the test device prove that the test device developed in this paper is used for the verification of the electric energy meter,and the test result can meet the laboratory test requirements.Finally,the dynamic test system of the electric energy meter was built,and the OOK test signal of different symmetrical run mode and the symmetrical run CS test signal were used as test excitation signals.The dynamic test experiment of the electric energy meter was carried out,and the error test results were given.The relationship expression between the symmetric run compression sensing dynamic test excitation signal and the measurement error of the symmetric run OOK dynamic test excitation signal is analyzed and given.The experimental results show the correctness of the above error relationship,and further explain the symmetric run CS test signal measurement The obtained electric energy meter error can reflect the combined error of multiple OOK test signals.