关口电能表测量误差的非线性建模

Non-linear modeling of measurement errors of gateway energy meter

为了明确电网参数与关口电能表测量误差之间的量化关系,准确预测关口电能表的动态测量误差,提出了一种基于非线性自回归外生输入(NARX)模型对关口电能表测量误差与相关电网参数进行非线性建模方法。首先对NARX预测模型进行阐述,以明确非线性模型的基本结构;然后提出测量误差建模的流程;最后通过测试找出影响测量误差的主要电网参数以及模型的最优结构。实验表明,通过该方法所确定的模型能够对电能表的动态测量误差的准确预测。研究结果对提高关口电能表检定效率和识别关口电能表故障具有积极意义。

In order to clarify the quantitative relationship between the grid parameters and the measurement error of the gate energy meter,and accurately predict the dynamic measurement error of the gate energy meter,a measurement error of the gate energy meter based on the nonlinear autoregressive exogenous input(NARX)model non-linear modeling method with relevant grid parameters is proposed.This method firstly elaborates on the NARX prediction model to clarify the basic structure of the non-linear model.Then the measurement error modeling process is proposed.Finally,the main grid parameters that affect the measurement error and the optimal structure of the model are found through testing.Experiments show that the model determined by this method can accurately predict the dynamic measurement error of the energy meter.The research results have positive significance for identifying the faults of the gate energy meter and improving the verification efficiency of the gate energy meter.